YIA-ST-1A1 — IsoFlow absorption chiller with Buffalo pumps, models YIA-ST / YIA-HW

Вид документа	Інструкція
Виробник	JCI
Моделі	YIA-ST-1A1, YIA-ST-14F3, YIA-HW-1A1, YIA-HW-14F3
Група обладнання	other
Мова документа	англійська
Розмір файлу	1.7 МБ

Про документ

Installation instructions for York IsoFlow single-stage absorption chillers fitted with Buffalo pumps, available in steam or hot water heat source versions from unit size 1A1 through 14F3. The unit is a self-contained, forced circulation refrigeration system using de-ionized water as refrigerant and 55% concentrated lithium bromide solution as absorbent.

Ключові дані

Heat source options	Steam (ST) or Hot Water (HW)
Unit sizes	1A1 thru 14F3
Refrigerant	De-ionized water
Absorbent	55% concentrated lithium bromide solution
Max steam pressure (design level B)	15 PSIG (103 kPa)
Max steam temperature (design level B)	337°F (169°C)
Max hot water entering temperature (design level B)	266°F (130°C)
Generator working hot water pressure	up to 150 PSIG (1034 kPa)

Застосування

Steam heat source cooling (YIA-ST)
Hot water heat source cooling (YIA-HW)
Indoor installations only — not suitable for outdoor installation

Особливості

Forced circulation system with solution pump, refrigerant pump and purge pump
Generator-condenser shell mounted on top of absorber-evaporator shell assembly
IsoFlow™ micro panel control center and power panel
Available as one-piece or two-piece shipment (sizes 12F1 thru 14F3 always shipped in two sections)
Quiet and free of vibration; spring-type vibration eliminating mountings not required
Double-wall design in evaporator section to prevent sweating
Optional factory insulation of cold surfaces

Технічні дані

Parameter	Value
Model nomenclature	YIA – ST/HW – size (1A1 thru 14F3) – design level – electrical code
Electrical options	17 = 208-3-60; 28 = 230-3-60; 46 = 460-3-60; 58 = 575-3-60; 50 = 380-3-50
Machine room temperature	no higher than 104°F, no lower than 35°F
Storage/shipment temperature limit	must not be stored below 35°F
Foundation leveling	concrete, level within 1/4 inch at four mounting legs
Recommended service clearance	min. 42 inches each side of unit; tube pull space equal to one unit length on one end; 60 inches opposite end; 20 inches above unit
Nitrogen shipping charge (two-piece units)	approximately 2 psig
Water nozzle connections	victaulic suitable for 150 PSIG DWP ANSI (standard); 150 or 300 PSIG DWP flanges optional
Strainer requirement	#10 mesh in chilled water line; #50 mesh fine mesh steam strainer in steam supply
Rupture disk (hot water units only)	carbon graphite, ruptures above 15.0 PSIG; mounting screws torque max 15-1/2 ft.-Lbs
Steam control valve location	between 48 and 120 inches (1.2 m to 3.0 m) from generator steam inlet flange
Full load steam pressure	9-12 PSIG (62 to 88 kPa) range down to vacuum at part load
Hot water control	factory-supplied 3-way diverting valve with electronic actuator
Power panel disconnect	100 amp, non-fused, service disconnect switch
Control power	115V, 50/60 Hz, 10 amps via factory mounted CPT
Field wiring	#14 AWG copper wire for one way distance less than 175 feet; #12 AWG for more than 175 feet and no more than 300 feet
Pump starter holding coils	115VAC, 50/60 Hz; max total 1.0 amp inductive at 115VAC
Ground lugs	suitable for wire sizes between #14 to 1/0 AWG
Hot surface insulation	2 inch thick, 3 lb. density fiberglass
Cold surface insulation	3/4 inch, closed-cell foam
Solution drums	30 gallon capacity
Refrigerant drums	55 gallon capacity

Варіанти замовлення

Model number structure: YIA – ST – 1A1 – 46 – B – S = York IsoFlow Absorption Chiller – heat source (ST = Steam, HW = Hot Water) – unit size (1A1 thru 14F3) – electrical (17/28/46/58/50) – design level – special (special tubes, contract job). Related forms: 155.16-PA1, 155.16-PA1.1, 155.16-PA1.2, 155.16-PA2, 155.16-W1, 155.16-W3, 155.16-W4.

Selected tables

Unit weights and dimensions (Table 1)

Unit	L×W×H (ft-in)	Maint. clearance	Shipping wt (lbs)	Oper. wt (lbs)	Max rig wt (lbs)
1A1	12-2½ × 5-1 × 7-7¼	10-8	8,900	8,700	10,900
1A2	14-2½ × 4-4 × 7-7¼	12-8	9,800	9,700	12,100
2A3	16-2½ × 4-4 × 7-7¼	14-8	10,800	10,600	13,500
2A4	18-2½ × 4-4 × 7-7¼	16-8	11,700	11,500	14,500
2B1	16-2½ × 4-10 × 8-7¾	14-8	13,400	13,300	17,400
3B2	18-2½ × 4-10 × 8-7¾	16-8	14,800	14,600	18,800
3B3	20-2½ × 4-10 × 8-7¾	18-8	16,200	16,000	20,900
4B4	22-2½ × 4-10 × 8-7¾	20-8	17,600	17,400	23,100
4C1	18-2½ × 5-5 × 9-10¾	16-8	18,500	18,200	25,100
5C2	20-2½ × 5-5 × 9-10¾	18-8	20,200	19,900	27,800
5C3	22-2½ × 5-5 × 9-10¾	20-8	21,800	21,500	30,000
6C4	24-8½ × 5-5 × 9-10¾	23-2	23,500	23,200	32,500
7D1	20-2½ × 6-6¼ × 11-7¾	18-8	28,700	28,400	39,400
7D2	22-2½ × 6-6¼ × 11-7¾	20-8	32,200	31,900	43,700
8D3	24-8½ × 6-6¼ × 11-7¾	23-2	35,700	35,400	48,000
8E1	22-6¼ × 7-2¼ × 12-7	20-8	39,000	38,600	53,100
9E2	25-0¼ × 7-2¼ × 12-7	23-2	43,400	43,000	59,100
10E3	27-6¼ × 7-2¼ × 12-7	25-8	48,500	48,100	65,600
12F1	25-0¼ × 7-10¼ × 13-10½	23-2	55,100	44,400	78,300
13F2	27-6¼ × 7-10¼ × 13-10½	25-8	59,700	48,100	86,000
14F3	30-6¼ × 7-10¼ × 13-10½	28-2	63,700	50,600	90,600

Electrical ratings (Table 3), sample rows verbatim

Chiller model	Voltage-Ph-Hz	Solution pump KVA / FLA / LRA	Refrig. pump FLA / LRA	Purge pump FLA / LRA	Panel amps	Total elem. ampacity	Min fuse
1A1	200/208-3-60	12.5 / 51.0	12.5 / 51.0	2.3 / 12.2	5.0	32.2	45
1A1	230-3-60	12.0 / 55.0	12.0 / 55.0	2.2 / 11.0	4.3	30.4	45
1A1	380-3-50	6.5 / 23.0	6.5 / 23.0	1.2 / 6.0	2.6	16.7	20
1A1	460-3-60	6.0 / 27.5	6.0 / 27.5	1.1 / 5.5	2.2	15.2	20
1A1	575-3-60	4.9 / 24.0	4.9 / 24.0	0.9 / 8.0	1.7	12.4	15
3B2	200/208-3-60	20.0 / 78.0	12.5 / 51.0	2.3 / 12.2	5.0	39.7	60
3B2	230-3-60	19.0 / 80.0	12.0 / 55.0	2.2 / 11.0	4.3	37.4	60
3B2	380-3-50	6.5 / 23.0	6.5 / 23.0	1.2 / 6.0	2.6	17.8	20
3B2	460-3-60	9.5 / 40.0	6.0 / 27.5	1.1 / 5.5	2.2	18.7	30
3B2	575-3-60	7.7 / 33.0	4.9 / 24.0	0.9 / 8.0	1.7	15.3	20
14F3	200/208-3-60	40.7 / 118.0	33.0 / 107.0	2.3 / 12.2	5.0	80.9	125
14F3	230-3-60	36.8 / 130.0	30.0 / 118.0	2.2 / 11.0	4.3	73.2	110
14F3	380-3-50	14.0 / 65.0	14.0 / 65.0	1.2 / 6.0	2.6	31.7	45
14F3	460-3-60	18.4 / 65.0	15.0 / 59.0	1.1 / 5.5	2.2	36.6	50
14F3	575-3-60	15.0 / 52.0	12.0 / 47.0	0.9 / 8.0	1.7	29.6	45

Note: all purge pump ratings are for the Welch model 1402.

Текст документа

ISOFLOW ABSORPTION CHILLERS
WITH BUFFALO PUMPS
INSTALLATION INSTRUCTIONS Supersedes: 155.16-N3 (1094) Form 155.16-N3 (899)

MODELS
STEAM
YIA-ST-1A1 THRU YIA-ST-14F3
HOT WATER
YIA-HW-1A1 THRU YIA-HW-14F3

00101VIP
IMPORTANT!
READ BEFORE PROCEEDING!
GENERAL SAFETY GUIDELINES

This equipment is a relatively complicated apparatus. During installation, opera-
tion, maintenance or service, individuals may be exposed to certain components
or conditions including, but not limited to: refrigerants, oils, materials under pres-
sure, rotating components, and both high and low voltage. Each of these items
has the potential, if misused or handled improperly, to cause bodily injury or death.
It is the obligation and responsibility of operating/service personnel to identify and
recognize these inherent hazards, protect themselves, and proceed safely in com-
pleting their tasks. Failure to comply with any of these requirements could result in
serious damage to the equipment and the property in which it is situated, as well as
severe personal injury or death to themselves and people at the site.

This document is intended for use by owner-authorized operating/service person-
nel. It is expected that this individual possesses independent training that will
enable them to perform their assigned tasks properly and safely. It is essential
that, prior to performing any task on this equipment, this individual shall have read
and understood this document and any referenced materials. This individual shall
also be familiar with and comply with all applicable governmental standards and
regulations pertaining to the task in question.

SAFETY SYMBOLS

The following symbols are used in this document to alert the reader to areas of
potential hazard:

DANGER indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.

WARNING indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.

2 YORK INTERNATIONAL
FORM 155.16-N3

CAUTION identifies a hazard which could lead to damage to the ma-
chine, damage to other equipment and/or environmental pollution. Usu-
ally an instruction will be given, together with a brief explanation.

NOTE is used to highlight additional information which may be helpful to
you.

CHANGEABILITY OF THIS DOCUMENT

In complying with YORK’s policy for continuous product improvement, the infor-
mation contained in this document is subject to change without notice. While
YORK makes no commitment to update or provide current information automati-
cally to the manual owner, that information, if applicable, can be obtained by con-
tacting the nearest YORK Applied Systems Service office.

It is the responsibility of operating/service personnel to verify the applicability of
these documents to the equipment in question. If there is any question in the mind
of operating/service personnel as to the applicability of these documents, then
prior to working on the equipment, they should verify with the owner whether the
equipment has been modified and if current literature is available.

YORK INTERNATIONAL 3
TABLE OF CONTENTS
NOMENCLATURE .............................................................................................. 6

INTRODUCTION ................................................................................................. 7

ADVANCED PREPARATION .............................................................................. 7
INITIAL INSPECTION OF UNIT ........................................................................... 7

FOUNDATION .................................................................................................... 8

LEVELING THE UNIT ......................................................................................... 8
SHIPMENT ......................................................................................................... 8

SOLUTION AND REFRIGERANT SHIPMENT ..................................................... 8

UNIT RIGGING ................................................................................................... 10
One Piece Unit Shipment ............................................................................. 10

Two Piece Unit Shipment ............................................................................. 10

UNIT ASSEMBLY CONNECTIONS FOR TWO PIECE SHIPMENTS ................... 12
INSTALLING THE ABSOLUTE PRESSURE GAUGE .......................................... 19

COMPLETING THE PURGE PUMP CONNECTIONS .......................................... 19

UNIT WATER PIPING ......................................................................................... 19
Strainers ...................................................................................................... 20

Absorber and Condenser Water Piping ......................................................... 20

RUPTURE DISK AND RELIEF PIPING ............................................................... 21
INLET STEAM PIPING ....................................................................................... 21

Inlet Steam Piping Components ................................................................... 22

STEAM CONDENSATE RETURN SYSTEM ....................................................... 24
Condensate Return System Components ..................................................... 24

HOT WATER PIPING ......................................................................................... 30

Inlet and Outlet Hot Water Piping ................................................................. 31
ELECTRICAL CONNECTIONS ............................................................................ 33

INSULATION ....................................................................................................... 41

Insulation Tips .............................................................................................. 41
INSTALLATION CHECK LIST .............................................................................. 41

4 YORK INTERNATIONAL
FORM 155.16-N3

LIST OF ILLUSTRATIONS
Fig. Page
1 Isolation Pads .............................................................................................................................................. 8
2 Model YIA IsoFlowTM Absorption Chiller Major Components ......................................................................... 9
3 Unit Rigging ................................................................................................................................................. 10
4 Unit assembly for models 1A1 thru 2A4 ....................................................................................................... 13
5 Unit assembly for models 2B1 thru 4B4 ....................................................................................................... 14
6 Unit assembly for models 4C1 thru 6C4 ....................................................................................................... 15
7 Unit assembly for models 7D1 thru 8D3 ....................................................................................................... 16
8 Unit assembly for models 8E1 thru 10E3 ..................................................................................................... 17
9 Unit assembly for models 12F1 thru 14F3 .................................................................................................... 18
10 Purge Pump ................................................................................................................................................ 19
11 Installation of Flow Switches ........................................................................................................................ 20
12 Typical cooling tower piping ......................................................................................................................... 21
13 Unit inlet steam piping ................................................................................................................................. 23
14 System 1 - Atmospheric condensate return system .................................................................................... 28
15 System 2 - Vacuum condensate return system ........................................................................................... 29
16 System 3 - Vacuum condensate return system when inlet steam and outlet condensate are under vacuum ....... 30
17 Diverting service for Honeywell valve ............................................................................................................. 31
18 Diverting service for Fisher valve ................................................................................................................... 31
19 Typical hot water piping system ................................................................................................................... 32
20 System water pump and flow switch interface details .................................................................................. 36
21 Steam and hot water unit field wiring ............................................................................................................ 37
22 IsoFlowTM micro panel control center component locations .......................................................................... 38
23 IsoFlowTM power panel component locations ............................................................................................... 39
24 IsoFlowTM power panel component locations ................................................................................................ 40

LIST OF TABLES
Table
1 Unit weights and dimensions ....................................................................................................................... 11
2 Shell and tube volumes ................................................................................................................................ 27
3 Electrical ratings .......................................................................................................................................... 34
4 Approximate insulation for hot and cold surfaces ......................................................................................... 42
5 Unit Charge Quantities ................................................................................................................................ 43

OTHER RELATED PUBLICATIONS
Form number Description
155.16-PA1 Field control modifications diagram for millennium control center
155.16-PA1.1 Dimensions and physical data for Steam Heat source units
155.16-PA1.2 Dimensions and physical data for Hot Water heat source units
155.16-PA2 Field connections for micro panel control center
155.16-W1 Wiring diagram for units with Franklin pumps
155.16-W3 Wiring diagram for CE coded units with Franklin pumps
155.16-W4 Wiring diagram for all units with Buffalo pumps

OTHER IMPORTANT MATERIALS
Installation Check list and request for authorized start-up engineer

(back cover)

YORK INTERNATIONAL 5
NOMENCLATURE

The model number denotes the following characteristics of the unit:

YIA – ST – 1A1 – 46 – B – S

MODEL SPECIAL
York IsoFlow Absorption Chiller Special Tubes
Contract Job

HEAT SOURCE DESIGN LEVEL
ST = Steam
HW = Hot Water

UNIT SIZE ELECTRICAL
1A1 thru 14F3 17 = 208-3-60
28 = 230-3-60
46 = 460-3-60
58 = 575-3-60
50 = 380-3-50

6 YORK INTERNATIONAL
FORM 155.16-N3

INTRODUCTION
This instruction describes the installation of an IsoFlow In selecting a site, consider structural support, access
Absorption Chiller with Buffalo pumps. The IsoFlow for service and tube pull area on either end of the unit.
unit is a complete self-contained, forced circulation re- (Tube pull area is approximately equal to the length of
frigeration system using steam or hot water as the acti- the main shell). Follow standard engineering practice in
vation medium. De-ionized water is used as the refrig- designing the piping system and other services. Ad-
erant and 55% concentrated lithium bromide solution is equate support must be provided for system pip-
used as an absorbent. The system consists of a gen- ing so that no weight is placed on the unit water
erator-condenser shell mounted on top of an absorber- boxes and connecting nozzles.
evaporator shell assembly. The system also utilizes a
solution pump, refrigerant pump, purge pump and inter- A minimum of 42 inches of service space is recom-
connecting piping. See Fig. 1 for major component and mended along each side of the unit. Tube pull space
piping locations. equivalent to one unit length must be provided on one
end of the unit. On the other end, opposite the tube pull
For more detailed information about design, specifica- end, a space of 60 inches is recommended for service
tions or operations on the particular unit you are install- clearance. There should be at least 20 inches of space
ing, please contact your local YORK office. above the unit.

When using this manual, the installer should pay par- YORK IsoFlowTM chillers are quiet and free of vibra-
ticular attention to the words: DANGER, WARNING, tion. Therefore, spring-type vibration eliminating
CAUTION and NOTE. These words are followed by mountings are not required. Mounting pads should be
symbols to alert the reader of areas of potential hazard. used, however, when the unit is installed in an area where
For further explanation see the safety section at the even mild noise would be objectionable, such as near a
front of this document. conference room, sleeping area or on a roof. If this is
the case, it is recommended to seek the advice of an
The contractor is advised to become thoroughly famil- acoustical consultant.
iar with the operation, installation, maintenance and ser-
vice requirements of the YORK IsoFlowTM chiller. Care- YORK IsoFlowTM chillers are not suitable for out-
ful study of the factory submittal drawings and this door installations. They must not be stored in tem-
manual is recommended. YORK representatives are peratures below 35°F. The machine room must be
available to answer any questions and to coordinate enclosed, well lighted and properly ventilated to keep its
delivery of the unit and its accessories. temperature no higher than 104°F and no lower than
35°F. Relative humidity in the machine room must never
YORK should be advised by the contractor of the sched- reach the saturation point. Condensation of moisture may
uled start-up time so that qualified personnel can be made cause corrosion and damage to electrical components.
available on that date. YORK requires a minimum of
four weeks advance notice to schedule a start-up and INITIAL INSPECTION OF UNIT
to have the lithium bromide solution delivered to the
jobsite. The shipment should be checked on arrival to see that
all major pieces, boxes and crates are received. The
ADVANCED PREPARATION unit should be checked on the trailer or rail car when
received, before unloading, for any visible signs of dam-
It is recommended to do a first-hand job site inspection age. Any damage or signs of possible damage should
to ensure a smooth installation process for your YORK be reported to the transportation company immediately
IsoFlowTM absorption chiller. Check all factory submit- for their inspection. YORK will not be responsible
tals and drawings to verify unit clearances, overall di- for any damage in shipment or at the job site or
mensions and weight. Electrical requirements, steam or loss of parts.
hot water pressure and temperature, foundation dimen-
sions should also be verified before the chiller arrives.

YORK INTERNATIONAL 7
INITIAL INSPECTION OF UNIT (CON’T) SHIPMENT

When received at the jobsite, all containers should be Model sizes 1A1 thru 10E3 are shipped as completely
opened and contents checked against the packing list or assembled units. Model sizes 12F1 thru 14F3 are shipped
shipping orders. Any material shortage must be reported in two sections and are factory charged with dry nitro-
to YORK immediately! (Refer to Shipping Damage gen.
Claims Form 50.15-NM).
Units shipped in two sections are assembled at the fac-
FOUNDATION tory to complete the piping and then are disassembled
for ease of shipment. The generator/condenser shell is
The foundation must be able to support the full weight shipped as one assembly; the absorber/evaporator shell,
of the unit when fully charged with refrigerant and so- heat exchanger, solution pump, refrigerant pump, vacuum
lution. The foundation must be made of concrete and pump/purge system, and micropanel/power panel are
level within 1/4 inch at the four mounting legs of the shipped as the other assembly.
unit. For foundation and unit dimensions see YORK
forms 155.16-PA1.1 and 155.16-PA1.2. On all units, whether they are one-piece assembly ship-
ment or split shipment, have the the following parts as
shipped loose: control valve (either steam or hot water),
chilled or tower water flow switches, absolute pressure
gauge, alcohol, heat conductive compound, 4 oz medi-
cal vial, vacuum pump hose, and various small fittings
and fasteners to field assemble the above to the unit.

SOLUTION AND REFRIGERANT SHIPMENT
LD00936
* Compressed thickness of isolation pad assembly Starting with orders released after January 1, 1999 the
procedure for ordering and shipping the solution and re-
NOTE: Floor to be level within 1/4". Place optional isolation pads
under all four feet as shown. (No bolting to floor required.) frigerant is changing.

FIG. 1 North America and Canada orders YORK Customer
Service will place an order with the solution supplier
and send a release form to the YORK service office
LEVELING THE UNIT
responsible for the chiller start-up. The service office is
then responsible for completing and forwarding the re-
Steam Units – Whether a unit is shipped as a com-
lease form to the supplier 2 weeks before they require
plete one-piece shipment or as a separate two-piece
shipment of the solution and refrigerant. The solution
shipment, a 1/2" fill-piece is attached under the feet of
and refrigerant will then ship in barrels, direct from
the lower shell at the generator steam entering end of
the solution supplier, to the jobsite.
unit. This should always be on the right hand side of the
unit when looking at the micropanel. The 1/2" longitudi-
International orders, if solution is purchased with the
nal inclination is to ensure that all possible condensate
IsoFlowTM chiller, YORK Customer Service will place
gets drained when the unit is shutdown in order to avoid
an order with the solution supplier. The solution and re-
“flushing” at unit start-up. For transverse leveling align-
frigerant will ship in barrels with the chiller to the port
ment, place a level on the top of the shell end sheet at
for packaging and consolidation.
each end of the unit.
Please note the refrigerant is De-ionized water and will
Hot Water Units – There is no inclination requirement
ship in barrels. Regular tap water can no longer be used
for hot water units. The longitudinal alignment of the
as refrigerant. See page 42 for unit charge quantities.
unit should be checked by placing a level on the top
center of the condenser shell. Transverse alignment
should be checked by placing a level on the top of the
shell end sheet at each end of the unit.

8 YORK INTERNATIONAL
YORK INTERNATIONAL
MAJOR COMPONENT LOCATION

REFRIGERANT CONDENSATE PURGE OIL TRAP SOLUTION SOLUTION REFRIGERANT HIGH TEMPERATURE GENERATOR CONDENSER
LINE TO EVAPORATOR CHAMBER SUPPLY DUMP ANTI-FREEZE CUTOUT SWITCH OUTLET BOX
(TYP 2) LINE TO VALVE LINE HT1
GENERATOR
POWER
PANEL

SOLUTION
SIGHT GENERATOR
GLASS

SOLUTION
LINE TO
ABSORBER
SPRAYS EVAPORATOR

ABSORBER

REFRIGERANT LINE
TO EVAPORATOR
SERVICE SPRAYS
VALVES SOLUTION
PUMP
PURGE
SOLENOID REFRIGERANT ADC
VALVE PURGE
OUTLET BOX REFRIGERANT FLUSH
PUMP
LEVEL FLOAT LINE
REFRIGERANT
CHAMBER PUMP
EDUCTOR
REFRIGERANT (1F) 28377A
PUMP AUTOMATIC
SOLUTION RETURN

FORM 155.16-N3
CUTOUT FLOAT ISOLATION DECRYSTALLIZATION
LINE FROM
(3F) VALVES PIPE (ADC)
GENERATOR
ISN MICRO
CONTROL PANEL
FIG. 2 – MAJOR COMPONENT LOCATIONS FOR ISOFLOWTM CHILLERS
9
FIG. 3
LD00937

UNIT RIGGING
ONE PIECE UNIT SHIPMENT shipments are built such that the rigger can set the two
sections together without disturbing the unit piping.
For lifting the unit, sling vertically. Position slings around
the unit, at the girth bands provided under the lower shell.
On multiple two-piece shipments, make
Use extreme care so as not to sling against, or on any
projecting brackets, pipes, fittings or any apparatus which
sure the upper and lower shells are
may be damaged under the weight of the unit. Do not matched correctly. Match identification
lift the complete unit by slinging the upper shell or numbers are stamped on each shell end
using the holes in the end sheets. See Fig. 3 - A. sheet. DO NOT MISMATCH THE UP-
PER AND LOWER SHELLS!
After rigging the unit to its final position, remove the
skids before lowering the unit into position. Use shims 1. Installing the lower shell - Check the foundation and
as necessary so that the unit sits squarely on the foun- set the lower shell in position in the manner described
dation. While mounting bolts are not required, holes are for the complete assembly. Use proper jacks or roll-
provided for bolts in each mounting foot for securing ers. See Fig. 3 -B.
the unit in areas known to experience earth tremors or 2. Installing the upper shell - Disconnect the skids from
seismically active areas. the top shell assembly. Using slings around the top
shell at the girth bands, hoist the top shell assembly
TWO PIECE UNIT SHIPMENT into position above the bottom shell assembly. Use
tapered pins at two opposite corners of the top shell
All units are available as a two piece shipment for easy to align the corner brackets as the top shell is low-
of transportation and handling. Larger units (12F1 thru ered onto the bottom shell assembly. Install the four
14F3) are always shipped in two sections. Two piece bolts at the corner brackets. See Fig. 3 - B.

10 YORK INTERNATIONAL
FORM 155.16-N3

TABLE 1 – UNIT WEIGHTS AND DIMENSIONS

UNIT WEIGHTS AND DIMENSIONS
*Maintenance
Overall Dimensions Approx. Shipping Approx.
Model clearance
(Feet - Inches)** Weight (lbs) Operating
Unit (feet - inches)
Weight (lbs)
Length Width Height (either end) Total Max. Rig
1A1 12 - 2-1/2 5-1 7 - 7-1/4 10 - 8 8,900 8,700 10,900
1A2 14 - 2-1/2 4-4 7 - 7-1/4 12 - 8 9,800 9,700 12,100
2A3 16 - 2-1/2 4-4 7 - 7-1/4 14 - 8 10,800 10,600 13,500
2A4 18 - 2-1/2 4-4 7 - 7-1/4 16 - 8 11,700 11,500 14,500
2B1 16 - 2-1/2 4 - 10 8 - 7-3/4 14 - 8 13,400 13,300 17,400
3B2 18 - 2-1/2 4 - 10 8 - 7-3/4 16 - 8 14,800 14,600 18,800
3B3 20 - 2-1/2 4 - 10 8 - 7-3/4 18 - 8 16,200 16,000 20,900
4B4 22 - 2-1/2 4 - 10 8 - 7-3/4 20 - 8 17,600 17,400 23,100
4C1 18 - 2-1/2 5-5 9 - 10-3/4 16 - 8 18,500 18,200 25,100
5C2 20 - 2-1/2 5-5 9 - 10-3/4 18 - 8 20,200 19,900 27,800
5C3 22 - 2-1/2 5-5 9 - 10-3/4 20 - 8 21,800 21,500 30,000
6C4 24 - 8-1/2 5-5 9 - 10-3/4 23 - 2 23,500 23,200 32,500
7D1 20 - 2-1/2 6 - 6-1/4 11 - 7-3/4 18 - 8 28,700 28,400 39,400
7D2 22 - 2-1/2 6 - 6-1/4 11 - 7-3/4 20 - 8 32,200 31,900 43,700
8D3 24 - 8-1/2 6 - 6-1/4 11 - 7-3/4 23 - 2 35,700 35,400 48,000
8E1 22 - 6-1/4 7 - 2-1/4 12 - 7 20 - 8 39,000 38,600 53,100
9E2 25 - 0-1/4 7 - 2-1/4 12 - 7 23 - 2 43,400 43,000 59,100
10E3 27 - 6-1/4 7 - 2-1/4 12 - 7 25 - 8 48,500 48,100 65,600
12F1 25 - 0-1/4 7 - 10-1/4 13 - 10-1/2 23 - 2 55,100 44,400 78,300
13F2 27 - 6-1/4 7 - 10-1/4 13 - 10-1/2 25 - 8 59,700 48,100 86,000
14F3 30 - 6-1/4 7 - 10-1/4 13 - 10-1/2 28 - 2 63,700 50,600 90,600

NOTES:
* Maintenance clearance for: 1. End opposite tube maintenance - 7'–0" minimum
2. Front and rear of unit 3'–0" minimum

** Add 8 inches to height dimension for skid allowances on assembled units and to each selection on units shipped knocked down.

YORK INTERNATIONAL 11
UNIT ASSEMBLY CONNECTIONS FOR TWO-PIECE SHIPMENTS

Units shipped in two pieces are charged with nitrogen Carefully follow the notes on each figure when assem-
at a pressure of approximately 2 psig. This charge should bling the top shell to the bottom shell.
be retained until the unit piping is to be completed, at
which time nitrogen pressure will be relieved. The ni- All piping must be checked and cleaned of all dirt and
trogen is relieved from the bottom shell through one of foreign material. DO NOT use oil on internal surfaces
the charging/sample valves located on the unit piping. of the system, including shipped-loose filler pieces. Once
For the top shell, relieve the nitrogen charge through a inside the system oil can seriously harm unit perfor-
coupling plug. Any threaded plugs removed must be re- mance.
installed by using Loctite thread sealer 565. Do not use
teflon tape for thread sealing on any YORK ab- Special care must be exercised to keep
sorption machine. dirt and other foreign materials out
of the pipes while the unit is open and
Welded connections – On two-piece shipment units during the process of opening the unit.
welding is necessary to complete many connections.
Caps and flat plates should be removed
These lines usually have closure caps or flat plates cov-
just prior to assembly. If there is any
ering the openings. All cutting or welding on any ab-
sorption chiller must be done in accordance to delay in the work and the pipes will
YORK form 155.17-M3. be open for a number of hours, the
ends of the pipe must be taped shut
The unit model number for each unit is stamped on the and a nitrogen blanket applied to the
unit data plate which is attached to the side of the YORK unit. DO NOT USE ANY BACK-UP
micropanel. Match the model you are assembling with RINGS WHEN WELDING PIPES.
the correct assembly drawing shown in Figs. 4 thru 9.

12 YORK INTERNATIONAL
YORK INTERNATIONAL

FORM 155.16-N3
LD04712
FIG. 4 – UNIT ASSEMBLY FOR MODELS 1A1 THRU 2A4
13
14

YORK INTERNATIONAL
FIG. 5 – UNIT ASSEMBLY FOR MODELS 2B1 THRU 4B4
LD04713
YORK INTERNATIONAL

FORM 155.16-N3
FIG. 6 – UNIT ASSEMBLY FOR MODELS 4C1 THRU 6C4 LD04714

15
16

YORK INTERNATIONAL
LD04715
FIG. 7 – UNIT ASSEMBLY FOR MODELS 7D1 THRU 8D3
YORK INTERNATIONAL

FORM 155.16-N3
FIG. 8 – UNIT ASSEMBLY FOR MODELS 8E1 THRU 10E3 LD04716

17
18

YORK INTERNATIONAL
LD04717

FIG. 9 – UNIT ASSEMBLY FOR MODELS 12F1 THRU 14F3
FORM 155.16-N3

INSTALLING THE ABSOLUTE PRESSURE GAUGE UNIT WATER PIPING

The absolute pressure gauge is shipped separately for When the assembly of the unit is complete, and unit is
field installation. Mount the gauge on the gauge bracket level, the condenser water and chilled water piping may
which is located on the lower shell of the unit adjacent be made.
to the purge piping. Use #10-24 UNC x 1 inch long flat
head machine screws and #10-24 UNC hex nuts. Make As standard, the unit nozzles will be provided with
sure the gauge is absolutely vertical by placing a level victaulic connections suitable for 150 PSIG DWP ANSI
on the side edge of the gauge before tightening the flanges for 150 or 300 PSIG DWP are provided only as
mounting screws. The gauge can be connected to the an option. The piping must be installed in accordance
manometer isolation hand valve via tubing. When doing with accepted piping practice and any applicable local
so, make sure the hand valve is in the closed position. piping codes. Provide adequate temperature and pres-
sure wells or taps on all supply and return piping.
COMPLETING THE PURGE PUMP CONNECTIONS
All water piping must be adequately
The purge pump should already be mounted on the side supported and braced independent of
of the unit with a special adaptor fitting, tee and ball the chiller. No strain is to be placed
valve installed at the discharge port of the purge pump. on the unit nozzles and/or connection
The suction port of the purge pump must be connected flanges.
to the oil trap canister connection which is located above
the purge pump. As part of the unit ship loose parts, The piping should be arranged with offsets for flexibil-
there should be two hose clamps and a length of wire ity, and adequately supported and braced independently
reinforced clear 3/4" I.D. tubing. Use this tubing and of the unit to avoid strain on the unit and vibration trans-
clamps to complete the connection between the purge mission. Hangers must allow for alignment of pipe. Iso-
pump suction port and the oil trap. lators (by others) in the piping are not necessary but
may be desirable, and may be required by customer
specifications.

Upon completion of piping, a connection in each line as
OIL close to the unit as possible should be opened, by re-
TRAP moving the flange bolts or coupling and checked for
DISCHARGE
piping alignment. If any of the bolts are bound in their
PORT holes, or if the connection springs are out of alignment,
the misalignment must be corrected by properly sup-
SUCTION
PORT porting the piping or by applying heat to anneal the pipe.

If the piping is annealed to relieve
stress, the inside of the pipe must be
cleaned of scale before it is finally
bolted in place.

Inlet and outlet nozzle connections are identified by la-
bels placed adjacent to each nozzle. Provide adequate
temperature and pressure wells or taps on all supply
and return piping. A chilled water flow switch is sup-
plied as a ship loose item, which must be installed in
LD04564 either the supply or return chilled water circuit close to
the unit. See Fig. 11. YORK highly recommends always
FIG. 10 – PURGE PUMP mounting the flow switches in a horizontal length of pipe
with the switch in a vertical position. It is not recom-
mended to mount the flow switches in a vertical pipe
with an upward flow due to the fact that minimum flow
may not be substantial enough to lift the switch’s paddle.
YORK INTERNATIONAL 19
NOTES:

1. Adjust the Flow Switch Paddle to the size
of the pipe in which it is to be used. Trim
extended paddle to the “L” dimension as
follows:

DIAMETER OF PIPE “L” DIMENSION
(INCHES) (INCHES)
5 4-5/8
6 5-5/8
8 AND LARGER FULL PADDLE

2. The Flow Switch is to be installed and up-
right, as shown.

3. Screw the Flow Switch in position so that
the paddle is at a right angle to the liquid
flow. (Arrow mark on side of casting must
point in same direction as liquid flow.)

4. The Flow Switch can be installed in either
LD00939 the inlet flow or outlet flow connections.

ITEM DESCRIPTION 5. Before installing Item 2 , make sure it is 1
inch long maximum.
1 Switch, Flow Control
2 Coupling, Pipe, 1” x 1” Lg.
3 Compound, Heat Conductive

FIG. 11 – INSTALLATION OF FLOW SWITCH

A condenser and/or hot water flow switch is shipped and chiller must be very carefully cleaned before start-
only as an order option but must be used in each instal- up.) If pumps are remotely installed from chiller, strain-
lation. See unit shipping papers if these switches are ers should be located directly upstream of the chiller.
supplied.
ABSORBER AND CONDENSER WATER PIPING
Foreign objects which could lodge in, or block flow
through, the cooler and absorber tubes must be cleaned The absorber and condenser water piping should be in
or flushed before being connected to the chiller pumps, accordance with the drawings for the specific system.
or other equipment. The tower water must be piped into the absorber nozzle
and out the condenser nozzle. A factory installed well is
STRAINERS located in the absorber inlet nozzle on the absorber inlet
water box. This nozzle should also have an inlet sticker
Permanent strainers (supplied by others) are required attached near it to help the installer identify which nozzle
in both the cooler and tower water circuits to protect is the inlet. It is also necessary to field fabricate the
the chiller water coils and controls, etc. The strainer cooling water crossover pipe from the absorber to the
should be a #10 mesh and be installed in the entering condenser, the material must be field supplied to do this.
chilled water line, directly upstream of the chiller. Wa- This pipe diameter must be the same size as the other
ter piping circuits should be arranged so that the pumps tower water connections, and have the same pressure
discharge to maintain essentially constant chilled and rating. Arrange the crossover pipe so that cleaning of
tower water flows through the unit at all load condi- the absorber, evaporator and condenser tubes can eas-
tions. If pumps discharge through the chiller, the strainer ily be accessible.
may be located upstream from the pumps to protect
both pump and chiller. (Piping between strainer, pump See Fig. 12 for tower water piping.

20 YORK INTERNATIONAL
FORM 155.16-N3

LD00941

FIG. 12 – TYPICAL COOLING TOWER PIPING

RUPTURE DISK AND RELIEF PIPING INLET STEAM PIPING
(HOT WATER UNITS ONLY) (REFER TO FIG. 13)

Only the IsoFlowTM absorption chillers that operate on The design level “B” IsoFlowTM absorption chiller is de-
hot water require a rupture disk. This disk is supplied by signed for a maximum pressure of 15 PSIG (103 kPa),
the factory and is sent with the chiller ship loose parts. with a maximum steam temperature of 337°F (169°C).
The rupture disk is made of a carbon graphite material All steam field piping should be installed in accordance
that will rupture should the unit pressure exceed 15.0 with any local, state or federal codes that may apply.
PSIG. This will protect the unit should there ever be a Piping should be adequately supported and braced inde-
tube rupture or the extremely unlikely case of abnor- pendent of the chiller. The support system must account
mally high refrigerant vapor pressure inside the unit. for the expansion and contraction of the steam piping,
The disk mounts between two neoprene gaskets (also avoiding the imposition of strain on chiller components.
shipped loose) and two steel flanges. Use graphite on Steam piping should be designed in accordance with
the screw threads and torque the screws that hold the good engineering practice.
rupture disk to a max of 15-1/2 ft.-Lbs.
A typical steam piping diagram is laid out in Fig. 13.
On the 4" schedule 40 stub provided, butt weld other The steam supply may be either low pressure steam or
sections of 4" pipe and route piping over and down to high pressure steam reduced to low pressure steam.
terminate approximately 10"- 12" above a floor drain. Both steam supply and condensate pipes must be prop-
Use adequate pipe supports and stand offs to ensure erly sized and pitched to prevent liquid hammering.
that no weight from the relief piping is bearing on the Steam mains should be sized in accordance with the
rupture disk or its flange. All relief piping must be in- required steam flow and acceptable pressure drop.
stalled in accordance with local, state or federal codes. Wherever possible, the steam supply line to the absorp-

YORK INTERNATIONAL 21
tion unit should be taken off the main steam supply line Steam Separator – The steam separator is installed in
from the top side to minimize the possibility of conden- the steam supply line and is used to separate any liquid
sate carry-over. Additional consideration should be given present in the steam. This condensate liquid would nor-
to steam flow velocity, especially in those applications mally be piped through a steam trap back to the con-
where noise is a factor. Generally speaking, steam ve- densate tank. The steam trap will prevent any steam
locities up to 6,000 fpm (30 m/s) will not produce an from blowing through the separator into the condensate
objectionable noise level. Always pitch steam supply return system. The use of a steam separator and trap
line to prevent hammering. will allow only dry steam to enter the unit at all times.

The factory supplied steam control valve must be in- All IsoFlowTM absorption chillers must operate with only
stalled 4 to 10 feet (1.2 m to 3.0 m) from the generator dry steam going into the generator. If dry steam can be
steam inlet flange in order to minimize the pressure drop supplied without the use of a steam separator, then it is
from the valve exit to the generator inlet. not necessary to install one. In cases where the chiller
is located close to the boiler or is supplied with super-
The following is a description of each component on the heat, the steam reaching the chiller may already be dry.
steam entering side of the steam piping. Refer to Fig. However, since any liquid present in the steam supply
13 for the actual recommended component location. entering the generator will reduce the heat input, it is
important to include a steam separator - unless it is truly
INLET STEAM PIPING COMPONENTS not necessary.

Manual Block Valve – This valve is installed to manu- Pressure Reducing Valve – A pressure reducing valve
ally shut off the steam supply to the unit, thus allowing must be used if the steam pressure to the chiller is greater
ease of serviceability if required. than 15 PSIG (103 kPa). For applications where the
steam supply pressure is known to fluctuate, it is recom-
Desuperheater – A desuperheater must be used up- mended that a steam pressure regulating valve be used.
stream of all controls when the steam supply has a tem-
perature in excess of 337° F (169°C). This is for all When needed, a steam pressure reducing valve suitable
design level “B” units only. If the unit is not a design for dead-end service must be provided in the steam sup-
level “B”, and it was not sold for Hi-temp. generator ply piping ahead of the steam control valve. This pres-
applications then the maximum design steam tempera- sure reducing valve should be sized on the basis of the
ture would be 285°F (140°C). The flow of coolant to pressure drop and absorption unit full load steam flow
the desuperheater should be automatically controlled to requirements, not on the basis of steam supply pipe size
maintain a constant steam supply temperature to the (which can result in an oversized valve). The pressure
absorption unit within the limits specified. Suitable auto- reducing valve should be provided with stop valves on
matic means should be provided to remove any conden- both inlet and outlet and a full size bypass with a globe
sate which may accumulate. Test thermowells should valve to permit manual operation during maintenance.
be provided in the steam inlet and outlet from the
desuperheater to check its operation. Two pressure reducing valves, one large and one small,
piped in parallel may be desirable for those applications
Steam Strainer – A fine mesh steam strainer (#50 with continued operation at low loads or where highly
mesh) is used to capture any impurities in the steam variable upstream pressures exist. The smaller valve
supply line. These impurities may manifest themselves would be set at a slightly higher pressure than the large
in the form of dirt, rust, or precipitates. This strainer will valve so it will stay open at low flow rates while the
prevent the chiller system components from getting large valve closes, thus protecting the seat of the larger
plugged. Plugged components will reduce system ca- valve. The use of two steps of steam pressure reduction
pacity and increase maintenance costs. A pressure gauge may be desirable on applications with pressure differen-
must be installed just before and after the steam strainer. tials in excess of 100 PSIG (690 kPa). The noise gener-
If the pressure drop as read from these two gauges ated in a single step of reduction may be objectionable.
increases to an unacceptable level, the steam strainer
should be removed and cleaned.

22 YORK INTERNATIONAL
FORM 155.16-N3

P = Pressure Gauge
TW = Test Thermowell STEAM CONTROL

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