| Вид документа | Технічний документ |
|---|---|
| Виробник | JCI |
| Код документа | Water-Source-Heat |
| Сторінок | 20 |
| Мова документа | англійська |
| Розмір файлу | 1.1 МБ |
Текст документа
Waterside Economizer Engineering Guide
Waterside
Economizer
Water Source Heat Pump
Applications
Sequence of Operations
Performance Data
Correction Factors
Dimensional Data
Electrical Schematics
Form: 146.15-EG1 (1217)
Supercedes: N/A
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Table of Contents
Waterside Economizer Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Sequence of Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermostat Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DDC Control Mode (SMART Equipment Controls). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Correction Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Water Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Air Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Condensate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Revision Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Waterside Economizer
According to the U.S. Energy Information Administration, HVAC
systems consume 25% to 49% of a typical office building’s energy use.
Improving the efficiency of the HVAC system makes a major impact
on overall energy use and provides significant savings to the building
owner. Adding an economizer to an HVAC system makes cooling more
energy efficient by using resources such as cool air or water in place of
operating a compressor. Depending on design conditions, economizers
can provide up to 100% of cooling load requirements.
JCI waterside economizer option allows the use of a building’s interior
loop water to provide “free” cooling. It works by passing air through
a coil cooled by loop water rather than through a coil cooled by
mechanical refrigeration. The economizer contains a water-to-air heat
exchanger, a 3-way valve, and controls that manage the flow of water
through the heat exchanger. The economizer is mounted in line with the heat pump’s return air flow. When cooling is
required and the building loop water temperature is below the economizer setpoint, typically 45°F, water is passed through
the economizer. Air is drawn through the cool economizer and the heat pump’s compressor is turned off. Cooling is then
provided by the economizer, reducing energy use.
JCI Advantage
The greatest benefit of the JCI waterside economizer is energy savings. A heat pump’s compressor consumes the
majority of power required to provide cooling. Turning the compressor off provides substantial savings. An added benefit
is improved life of the compressor through lower run hours and less cycling. When mandated by code, the waterside
economizer can also help buildings comply with ASHRAE Standard 90.1. See “JCI Code Review” for information on the
requirement of economizers on WSHPs.
Waterside economizers have advantages over airside economizers as well. Because they are not directly subject to
outdoor air conditions, waterside economizers can provide longer operating hours and better humidity control. They also
have fewer mechanical components and are less prone to failure. Airside economizers can fail in the open position, leading
to much higher energy costs.
Typical Applications
Candidates for waterside economizers include commercial buildings that have simultaneous heating and cooling loads. For
example, during cool weather a building may require heating around the perimeter and at the same time require cooling
for the core space. The perimeter heating will cool the loop water which in turn flows through the economizers that are
cooling the core space. The heat absorbed from the core space is then put back into the loop, providing higher efficiencies
for both heating and cooling. Waterside economizers are also a good fit for buildings where it is difficult to use an airside
economizer. An example of this would be a multi-story building using separate air handlers for each floor and no central air
delivery system.
4
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Application Notes
Application Notes
Single compressor units with waterside economizers are only available with ECM fan motors and stainless steel drain pans.
Dual compressor units with waterside economizers may require a higher static blower package to compensate for the
added pressure drop. In either case, careful consideration of the CFM requirements should be taken into account when
using waterside economizers.
Standard Mode
In standard operating mode, water flows through the inlet to the 3-way valve, bypasses the economizer coil, and flows
directly into the inlet of the coaxial heat exchanger inside the heat pump.
Economizer mode
In economizer operating mode, water flows through the inlet to the 3-way valve, continues through the economizer coil,
and then into the inlet of the heat pump. The tee port on the 3-way valve is closed off in economizer mode.
5
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Sequence of Operations
Thermostat Mode
An additional thermostat control will be factory provided on water source heat pumps equipped with waterside economizer
that will be controlled through standard thermostat signals. A temperature sensor is factory installed on the inlet water
connection to the economizer. The economizer thermostat will be set in the factory to enable economizer operation when
the incoming water temperature falls below 45°F. If the temperature is above this setpoint, normal mechanical cooling is
enabled. Please refer to the schematic provided for more information on thermostat mode.
DDC Control Mode (SMART Equipment Controls)
Water source heat pumps equipped with waterside economizer option that require communication with the building
management system (BMS) will need the SMART Equipment Controls option as well. A factory installed sensor will be
installed with the SMART Equipment Controls controls that will read the incoming water temperature. Based on the
setpoint, the SMART Equipment Controls will determine whether the unit shall operate in standard cooling mode or
in economizer mode. Factory default is 45°F and can be adjusted through the BMS. Please consult SMART Equipment
Controls Application Guide for specific details of control sequence of operations.
6
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Performance Data
RB Series Waterside Performance Data
Waterside Airside Cooling Capacity
Model Delta P Sensible
GPM psig ft. hd. CFM Total Btu/hr
(in. w.g.) Btu/hr
024 6 0.8 1.8 800 0.23 24,477 19,478
030 8 1.3 3.1 1,000 0.33 29,537 23,697
036 9 1.9 4.4 1,150 0.25 38,181 29,441
Vertical
042 11 1.8 4.2 1,400 0.26 44,771 34,789
048 12 2.1 5.0 1,600 0.32 48,651 38,472
060 15 3.5 8.1 1,900 0.30 62,414 47,714
070 18 4.1 9.5 2,100 0.28 71,672 53,971
024 6 1.0 2.3 800 0.18 25,896 20,300
030 8 1.7 3.9 1,000 0.27 33,317 25,548
Horizontal
036 9 1.4 3.2 1,150 0.21 38,117 29,445
042 11 2.1 4.9 1,400 0.24 48,236 36,462
048 12 2.5 5.8 1,600 0.30 53,222 40,616
060 15 2.6 6.0 1,900 0.26 65,411 49,783
070 18 3.2 7.4 2,100 0.25 75,252 56,014
3/13/15
RG Series Waterside Performance Data
Waterside Airside Cooling Capacity
Model Delta P Sensible
GPM psig ft. hd. CFM Total Btu/hr
(in. w.g.) Btu/hr
024 6 1.2 2.7 800 0.14 28,403 21,486
030 8 2.0 4.6 1,000 0.20 36,362 27,050
036 9 1.5 3.6 1,150 0.19 39,581 29,909
Vertical
042 11 2.5 5.7 1,400 0.18 52,063 38,020
048 12 2.9 6.7 1,600 0.22 57,559 42,459
060 15 3.6 8.3 1,900 0.23 69,670 50,951
070 18 3.5 8.2 2,100 0.23 78,293 57,550
024 6 0.6 1.4 800 0.12 26,898 20,831
030 8 1.1 2.6 1,000 0.17 33,549 25,885
Horizontal
036 9 1.5 3.4 1,150 0.18 39,840 30,264
042 11 1.8 4.2 1,400 0.16 50,365 37,359
048 12 2.1 5.0 1,600 0.20 55,962 41,858
060 15 2.7 6.4 1,900 0.21 69,193 51,654
070 18 3.4 7.8 2,100 0.21 78,773 57,755
3/13/15
7
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Performance Data cont.
RK Series Waterside Performance Data
Waterside Airside Cooling Capacity
Model
GPM psig ft. hd. CFM Delta P (in. w.g.) Total Btu/hr Sensible Btu/hr
024-026 8 1.2 2.87 800 0.11 31,404 22,593
030 8 1.2 2.87 900 0.13 33,289 24,518
036-038 9 1.3 2.94 1,200 0.14 41,764 31,793
Vertical
042 11 1.6 3.67 1,300 0.13 48,857 35,999
048-049 12 1.9 4.32 1,500 0.16 54,625 40,782
060-064 15 2.5 5.79 1,800 0.18 67,153 49,607
070-072 18 3.5 8.18 2,000 0.21 76,538 55,758
024-026 8 1.2 2.71 800 0.10 31,533 22,751
030 8 1.2 2.7 900 0.12 33,413 24,766
Horizontal
036-038 9 1.2 2.86 1,200 0.13 41,862 31,615
042 11 1.5 3.51 1,300 0.12 49,404 36,229
048-049 12 1.8 4.13 1,500 0.15 55,437 41,177
060-064 15 2.9 6.6 1,800 0.16 70,507 51,010
070-072 18 3.3 7.73 2,000 0.19 76,998 55,954
3/13/15
RL Series Waterside Performance Data
Waterside Airside Cooling Capacity
Model
GPM psig ft. hd. CFM Delta P (in. w.g.) Total Btu/hr Sensible Btu/hr
Horizontal
080 22 1.0 2.3 2,600 0.15 91,509 68,872
095 24 1.2 2.7 2,800 0.16 100,274 74,831
120 28 1.6 3.6 3,600 0.24 123,397 93,349
080 22 1.9 4.3 2,600 0.16 96,506 71,324
095 24 2.5 5.8 2,800 0.15 113,644 80,924
120 28 2.2 5.1 3,600 0.18 129,742 97,238
Vertical
160 35 1.8 4.1 5000 0.13 191,896 140,078
180 45 2.8 6.5 5,600 0.15 226,916 161,648
240 60 4.6 10.5 7,600 0.25 287,542 208,758
300 75 6.9 15.9 9,500 0.36 337,654 249,294
3/13/15
8
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Correction Factors
Entering Fluid Total Sensible
Temperature Deg °F Btu/hr Btu/hr
45 1.000 1.000
50 0.819 0.899
55 0.641 0.799
60 0.478 0.657
65 0.360 0.494
70 0.241 0.330
3/13/15
Water Pressure
Waterside economizer coils are designed to handle a maximum fluid side working pressure of 500 psig. Pressure drop
values published in the waterside economizer performance tables only account for the economizer coil. The heat pump
pressure drop published in the specification catalogs shall be added to this pressure drop. Pressure drop is calculated with
rated flow as stated in the table at 45 F entering fluid temperature.
Air Pressure
Published air side pressure drop only accounts for the economizer coil and shall be added to the heat pump pressure
drop. Pressure drop is calculated with a wet coil at 80 F/67 F (db/wb) return air temperature. Please verify the required
CFM can be delivered to the space with the extra resistance of the economizer coil along with the design external static
pressure.
Condensate
All horizontal heat pumps must be externally trapped and vented according to mechanical code requirements. The
condensate drains should be tied together as illustrated below. Most vertical units are internally trapped on the heat pump
and will need externally trapped at the waterside economizer drain.
9
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Dimensional Data
Single Compressor Vertical
MOUNTS FLUSH WITH TOP PANEL
CONTROLS FOR
THERMOSTAT
OPERATION
"C"
"B"
WATER INLET
"A" NOT SUPPLIED
FIELD INSTALLED WATER OUTLET
DK > ^ Z/ ^ DK > ^ Z/ ^ DK > ^ Z/ ^ Η Η Η Η Η Η FILTER RACK WIDTH
Z ^sϬϮϰͲϬϯϬ ϳ͘Ϯ ϮϮ ϮϮ͘Ϯ Ϯ͘Ϯ
Z ^sϬϯϲ Z'^sϬϮϰͲϬϯϬ ϳ͘Ϯ Ϯϲ Ϯϲ͘Ϯ Ϯ͘Ϯ
Z ^sϬϰϮͲϬϰϴZ'^sϬϯϲͲϬϰϭ Z<sϬϮϰͲϬϯϬ ϳ͘Ϯ ϯϬ Ϯϲ͘Ϯ Ϯ͘Ϯ
Z ^sϬϲϬ Z'^sϬϰϮͲϬϰϴ Z<sϬϯϲͲϬϯϴ ϳ͘Ϯ ϯϬ ϯϭ͘Ϯ Ϯ͘Ϯ
Z ^sϬϳϬ Z'^sϬϲϬ Z<sϬϰϮͲϬϰϵ ϳ͘Ϯ ϯϰ ϯϭ͘Ϯ Ϯ͘Ϯ
Z'^sϬϳϬ Z<sϬϲϬͲϬϳϮ ϳ͘Ϯ ϯϴ ϯϭ͘Ϯ Ϯ͘Ϯ
All dimensions in inches.
10
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Dimensional Data cont.
Single Compressor Horizontal
"C"
"D"
"B"
"E"
"A"
DK > ^ Z/ ^ DK > ^ Z/ ^ DK > ^ Z/ ^ Η Η Η Η Η Η Η Η Η Η FILTER RACK WIDTH
Z ^,ϬϮϰͲϬϯϬ ϳ͘Ϯ ϭϳ͘Ϯ ϰϮ ϮϮ͘ϳ ϰϰ͘ϲ Ϯ͘Ϯ
Z ^,Ϭϯϲ Z'^,ϬϮϰͲϬϯϬ ϳ͘Ϯ ϭϵ͘Ϯ ϰϮ ϮϮ͘ϳ ϰϰ͘ϲ Ϯ͘Ϯ
Z ^,ϬϰϮͲϬϰϴ Z'^,ϬϮϰͲϬϯϬ Z<;^ͬdͿ,ϬϮϰͲϬϯϬ ϳ͘Ϯ ϭϵ͘Ϯ ϰϱ ϮϮ͘ϳ ϰϳ͘ϲ Ϯ͘Ϯ
Z ^,ϬϲϬ Z'^,ϬϮϰͲϬϯϬ Z<;^ͬdͿ,ϬϯϲͲϬϯϴ ϳ͘Ϯ Ϯϭ͘Ϯ ϰϴ Ϯϱ ϱϬ͘ϲ Ϯ͘Ϯ
Z ^,ϬϳϬ Z'^,ϬϮϰͲϬϯϬ Z<;^ͬdͿ,ϬϰϮͲϬϰϵ ϳ͘Ϯ Ϯϭ͘Ϯ ϱϯ Ϯϱ ϱϱ͘ϲ Ϯ͘Ϯ
Z'^,ϬϮϰͲϬϯϬ Z<;^ͬdͿ,ϬϲϬͲϬϲϰ ϳ͘Ϯ Ϯϭ͘Ϯ ϲϭ Ϯϱ ϲϯ͘ϲ Ϯ͘Ϯ
Z<;^ͬdͿ,ϬϳϬͲϬϳϮ ϳ͘Ϯ Ϯϭ͘Ϯ ϲϴ Ϯϱ ϳϬ͘ϲ Ϯ͘Ϯ
WATER INLET
All dimensions in inches. CONTROLS FOR
THERMOSTAT
OPERATION
WATER OUTLET
NOT SUPPLIED
FIELD INSTALLED
11
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Dimensional Data cont.
1+ (&2120,=(5 237,21
RK080-120 ECONOMIZER OPTION
/()7 5(7851 6+2:1
(LEFT RETURN SHOWN)
7.00
89.00 25.00
287/(7
ECONOMIZER DRAIN
ACCESS PANEL
SEE DETAIL "A"
2.00
1 3/8" O.D. CONNECTIONS
14.70
,1/(7
FIELD INSTALLED
3-WAY VALVE
ASSEMBLY
LEFT RETURN
DETAIL "A" AS SHOWN
RIGHT RETURN
FLIPPED 180°
12
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Dimensional Data cont.
19 (&2120,=(5 237,21
RL080-120 ECONOMIZER OPTION
5,*+7 5(7851 6+2:1
(RIGHT RETURN SHOWN)
2.87" ADDITIONAL WIDTH
FOR FILTER RACK
7.21
61.00
37.75
FIELD INSTALLED
13
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Dimensional Data cont.
721 9(57,&$/
723 ',6+&$5*( Z (&2120,=(5 6,'( ',6&+$5*(
&21752/ %2;
/()7 5(7851
&21752/ %2;
5,*+7 5(7851
6(&21'$5<
6(59,&( $&&(66
&3 &3
:$7(5 $3 :$7(5
&211(&7,216
5,*+7 5(7851
$3 &03 &211(&7,216
5,*+7 5(7851
&03
>ĞŐĞŶĚ
W с ů Ğ ŶĂ Ğ ^Ğ ŝĐĞ WĂŶĞů &3
&3 $3 $3
&03 W с ůŽ Ğ ^Ğ ŝĐĞ WĂŶĞů &03 $03
$03
W с ŽŶ Žů ĐĐĞ WĂŶĞů 6(&21'$5<
6(59,&( $&&(66
DW с Žŵ Ğ Ž ^Ğ ŝĐĞ WĂŶĞů
6(&21'$5<
&21752/ %2; 6(59,&( $&&(66 &21752/ %2;
6(&21'$5< /()7 5(7851 5,*+7 5(7851 6(&21'$5<
6(59,&( $&&(66
723 9,(:
6(59,&( $&&(66
/ 25 5 5(7851
LQ LQ
FP FP
LQ LQ LQ LQ
FP FP FP FP
LQ LQ
FP FP
LQ '5$,1 &211(&7,21
FP
LQ LQ 723 3$1(/ &29(5
FP FP LQ LQ
FP FP
LQ LQ
FP FP
LQ
FP
LQ LQ
LQ FP FP
FP
LQ
FP
LQ LQ LQ LQ LQ
LQ FP FP FP
FP FP FP
$/7(51$7,9( (/(&75,& &211(&7,216
14
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Dimensional Data cont.
LQ
FP
LQ
FP
6,'( 9,(: LQ
FP
/ 25 5 5(7851
LQ LQ
FP FP
LQ
FP LQ
FP
LQ
FP
LQ LQ
FP FP LQ LQ
FP FP
$,5 &2,/6
$,5 &2,/6
LQ $,5 ,1/(7 /()7 5(7851 5,*+7 5(7851 $,5 ,1/(7
FP LQ
723 25 6,'( ',6&+$5*( FP
LQ LQ
FP FP
LQ LQ
FP FP
(/(&75,&$/ &211(&7,216 (/(&75,&$/ &211(&7,216
LQ LQ LQ
'5$,1 &211(&7,216 FP FP LQ FP
2 ' FP '5$,1 &211(&7,216
LQ 2 '
FP LQ
FP
LQ :$7(5 287 LQ
FP :$7(5 287
)37 )37 FP
LQ LQ
:$7(5 ,1 FP :$7(5 ,1
LQ )37 FP
)37 LQ
FP FP
LQ LQ
FP FP
LQ LQ
FP FP
15
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Electrical Schematics
24 VAC Thermostat Mode
Aurora
Base
Control
LO R C O/B G Y1 Y2 W DH
P1
TB3
LO
24 VAC
(+)BIN
R
(-) COM C
(+)SEN O/B
T G
Orange (109)
Red (108) Violet (110) Thermostat
Yellow (111)
A99 Y1
Y2
Sensor
A419 W
DH
Temperature
Controller
TB1 TB2 O/B Comp Y1 C
R
T1 T2 NC C NO PS1 PS2
Orange (101)
Red (102)
Violet (104)
24V 3-Way
Valve
Black (103)
5 2
1
3
R1 4
Yellow (105)
Black/White (106)
Gray/White (107)
Legend
Factory Low Voltage Wiring Thermistor
Factory Line Voltage Wiring T
Field Low Voltage Wiring Relay Coil
Field Line Voltage Wiring
Optional Block Switch - Condensate Overflow
DC Voltage PCB Traces
Field Zone Sensor Wiring Switch - High pressure
Internal Junction Switch - Low pressure
Quick Connect Terminal
L1 Field Wiring Lug Polarized connector
3 2 1
Ground
G Light Emitting Diode - Green
Relay Contacts – N.O., N.C.
Capacitor Y Light Emitting Diode - Yellow
Fuse
R Light Emitting Diode - Red
TB1 – Terminal Block 1
TB2 – Terminal Block 2
TB3 – Terminal Block 3
NO – Normally Open
NC – Normally Closed
R1 – Relay
PS1 – Power strip 1
PS2 – Power strip 2
16
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Notes
17
WATERSIDE ECONOMIZER ENGINEERING GUIDE
Revision Guide
Pages: Description: Date: By:
All First Published Aug 2017 JM
18
Product: Water Source Heat Pump
Waterside Economizer
Document Type: Engineering Guide
Form: 146.15-EG1 (1217)
Supercedes: N/A
*146.15-EG1*
146.15-EG1 12/17Документ виробника, опублікований як довідковий матеріал на обладнання, яке ми постачаємо. Правовласник може попросити прибрати його — приберемо.