| Вид документа | Бюлетень виробу |
|---|---|
| Виробник | JCI |
| Код документа | a350a-b-electronic-temperature-control |
| Група обладнання | A350A/B Temperature Control with Relay Output |
| Сторінок | 10 |
| Мова документа | англійська |
| Розмір файлу | 0.2 МБ |
Текст документа
FANs 930, 930.5, 125, 121
Product/Technical Bulletin A350
Issue Date 0614
System 350™
A350A/B Electronic Temperature Control
The A350A/B Series is an on/off electronic
temperature control with a Single-Pole, Double-Throw
(SPDT) relay output and a Light-Emitting Diode (LED)
relay status indicator. Designed to operate with both
heating and cooling equipment, this control includes
an adjustable differential and an interchangeable
temperature sensor.
As are all System 350™ products, the A350A/B is
housed in a NEMA 1, high-impact plastic enclosure.
The modular design provides easy, plug-together
connections for quick installation and future
expandability.
Figure 1: A350 Series Electronic
Temperature Control
Features and Benefits
Modular Design Enables stage, display, and power modules to
be purchased and installed as needed
Plug-together Connectors Eliminates wiring between modules and
and 35 mm DIN Rail reduces installation costs
Mounting
Two Standard Models Reduces inventory by encompassing
Cover Wide Setpoint temperature ranges required to support the
Ranges majority of Heating, Ventilation, Air
-30 to 130°F (-34 to 55°C) or Conditioning, and Refrigeration (HVAC/R)
90 to 250°F (32 to 121°C) applications
Wide Adjustable Differential Enables the user to match equipment cycle
of 1 to 30F° (0.6 to 16.7C°) rate and/or sequencing for a given application
Field-Selectable Mode Operates in both heating and cooling
Jumpers applications
Available with Either Helps deter accidental and unauthorized
External or Concealed adjustments
Setpoint
Interchangeable Increases versatility and serviceability
Temperature Sensors
© 2014 Johnson Controls, Inc. 1
Part No. 24-7664-44, Rev. D www.johnsoncontrols.com
Code No. LIT-930010
A pplication
The A350A/B Temperature Control can be used as IMPORTANT: Use this A350A/B Electronic
a standalone device or in conjunction with other Temperature Control only as an
System 350 plug-together modules to control single or operating control. Where failure or
multiple-stage HVAC or refrigeration equipment. malfunction of the A350A/B control
Typical applications include: could lead to personal injury or
frozen/refrigerated food cases property damage to the controlled
equipment or other property,
cooling tower control additional precautions must be
designed into the control system.
beverage/milk coolers Incorporate and maintain other
chiller staging devices, such as supervisory or
alarm systems or safety or limit
space temperature control controls, intended to warn of or
protect against failure or malfunction
A typical System 350 Temperature Control of the A350A/B control.
arrangement includes the following:
IMPORTANT: Utiliser ce A350A/B Electronic
A350A/B Temperature Control Temperature Control uniquement en
tant que dispositif de régulation.
S350 Stage Modules
Lorsqu'une défaillance ou un
D350 Digital Temperature Sensor/Setpoint Display dysfonctionnement du
Module A350A/B control risque de provoquer
des blessures ou d'endommager
Y350R Power Module (or Class 2 l'équipement contrôlé ou un autre
24 VAC transformer) équipement, la conception du
système de contrôle doit intégrer des
A99B Series Temperature Sensor dispositifs de protection
supplémentaires. Veiller dans ce cas
à intégrer de façon permanente
d'autres dispositifs, tels que des
systèmes de supervision ou
d'alarme, ou des dispositifs de
sécurité ou de limitation, ayant une
fonction d'avertissement ou de
protection en cas de défaillance ou
de dysfonctionnement du
A350A/B control.
2 System 350 A350A/B Electronic Temperature Control Product/Technical Bulletin
Setpoint Adjustment
O peration
Setpoint is defined as the temperature at which the
The A350A/B Temperature Control operates on A350A/B’s relay de-energizes. Use the Setpoint Dial
24 VAC and provides an SPDT relay output. A front on the front of the A350A/B to adjust setpoint. See
panel LED lights to indicate when the relay is Figure 2.
energized. Adjustable features include:
setpoint Differential Adjustment
differential Differential is defined as the change in sensor
temperature between energization and de-
heating/cooling mode energization of the relay. Adjustment of the A350A/B
differential is made using the potentiometer marked
IMPORTANT: All System 350 Controls are DIFF. See Figure 2 for its location. Refer to Table 5 for
designed for use only as adjustment ranges.
operating controls. Where an
operating control failure would
24V
result in personal injury and/or
COM
loss of property, it is the VDC
Setpoint
responsibility of the installer to Dial
SEN
add devices (safety, limit controls) Module
Connector
that protect against, or systems
(alarm, supervisory systems) that DIFF
warn of, control failure. (Differential
Potentiometer) Jumper Block
Position
Relay
LED Indicator Relay Heating
Cooling
NC NO
Figure 2: A350A/B Board Layout and
Terminal Locations
Heating/Cooling Mode Adjustment
With Heating mode selected, the differential is below
setpoint. The relay and LED indicator will de-energize
as the temperature rises to the setpoint. As the
temperature drops to the setpoint minus the differential
setting, the relay will energize and the LED illuminates.
Refer to Figure 6.
With Cooling mode selected, the differential is above
setpoint. The relay and LED indicator will de-energize
as the temperature drops to setpoint. As the
temperature rises to the setpoint plus differential
setting, the relay will energize and the LED illuminates.
As shipped from the factory, the heating/cooling
jumper blocks are installed in the horizontal (cooling)
position. See Figure 2.
System 350 A350A/B Electronic Temperature Control Product/Technical Bulletin 3
S350C Slave Stage Modules
A dd-On Modules
S350C Slave Stage Modules receive power and
The S350 Stage Modules, D350 Digital Temperature sensor input from the A350 control. S350C Slave
Display Module, and Y350R Power Module connect Stage Modules perform switching functions based
together and plug into the A350 via a connector on its upon the A350’s sensor information. (Setpoint and
right side. The maximum number of add-on modules is differential are selected independently at the S350C.)
listed in Table 1. For more information on these modules, refer to the
System 350TM S350C Temperature Slave Stage
Table 1: Maximum Number of S350 Stage Module Product/Technical Bulletin (LIT-930084).
Modules per A350A/A350B
Power Number Number Number S350P Proportional Stage Modules
Source of S350A of S350A of S350A S350P Proportional Stage Modules receive power,
or S350C or S350C or S350C setpoint, and sensor input from the A350 control.
Modules Modules Modules The S350P responds with an analog 0-10 VDC and
Allowed (with (with 0-20 mA output signal. This is based upon the A350’s
1 S350P) 2 S350P) setpoint and sensor information, with the offset,
Allowed Allowed throttling range, and minimum output selected at the
Y350R 9 6 4 S350P.
External 9 8 7 For more information on these modules, refer to the
Class 2 System 350TM S350P Proportional Plus Integral
Transformer Temperature Stage Module Product/Technical Bulletin
(LIT-930086).
Note: For each S350P added, the number of S350A
or S350C Stage Modules that can be used
with a Y350R decreases by two. If an external D350 Temperature Sensor/Setpoint
transformer is used, the number of S350A and Display Module
S350C Stage Modules used decreases by The D350 receives power, sensor, and setpoint
one for each additional S350P. information from the A350. A 3-digit Liquid Crystal
Diode (LCD) gives continuous read-out of the sensed
S350A On-Off Stage Modules temperature. Pushing the PRESS FOR SETPOINT
button on the front of the D350 causes the setpoint of
S350A On-Off Stage Modules receive power, setpoint, the adjoining A350 to be displayed.
and sensor input from the A350 control. S350A Stage
Modules perform switching functions based upon the
A350’s setpoint and sensor information, with the offset Y350R Power Module
and differential selected at the S350A. The Y350R provides a convenient method of powering
For more information on these modules, refer to the System 350 modules from a 120 or 240 VAC power
System 350 S350 Temperature, S351 Humidity, and source. The Y350R supplies power to the modules.
S352 Pressure On/Off Stage Modules See Figure 5 for a typical wiring diagram where a
Product/Technical Bulletin (LIT-930080). Y350R is used to power the A350.
For more information on this module, refer to
System 350TM Y350R Power Module
Product/Technical Bulletin (LIT-930090).
4 System 350 A350A/B Electronic Temperature Control Product/Technical Bulletin
D imensions
Mounting Slots
3/16 (4)
for No. 6 Screws
1/2 (13)
2 15/16
(75)
5 (127)
4 (102)
1 9/16 2 3/8 (61)
DIN Rail
(40) 7/16 (11) Mount 1 3/16 (31)
Sensor
3 (76) Conduit
1/4 (6) Hole
2 3/8 (61)
7/8
9 3/4 (248) (22)
7/8
(22)
Figure 3: A350A/B Control Dimensions, in. (mm)
System 350 A350A/B Electronic Temperature Control Product/Technical Bulletin 5
Sensor
I nstallation and Wiring Note: If sensor is mounted less than 50 ft
(15.2 m) from the A350A/B,
The A350A/B Temperature Control is housed in a shielded cable is not required.
compact NEMA 1 plastic enclosure designed for A350A/B S350A D350
standard 35 mm DIN rail mounting. The A350A/B is not
position sensitive but should be mounted for convenient L1 24
wiring and adjustment. Four key-slot mounting holes on 2 VAC
the back of the control case are provided for surface
mounting. Add-on modules must plug into the right side 24V
of the A350A/B control. COM
VDC
Note: When mounting the System 350 modules to rigid SEN
conduit, attach the hub to the conduit before
securing the hub to the control enclosure.
L1
! WARNING: Risk of Electric Shock.
2
Load Load
Disconnect the power supply
before making electrical
Figure 4: Typical Wiring Diagram for A350A/B
connections. Contact with
components carrying hazardous Powered by an External 10 VA Transformer
voltage can cause electric shock
and may result in severe Sensor Connection
personal injury or death. Shielded cable is not generally required for sensor
AVERTISSEMENT:Risque de décharge wiring on runs of less than 50 ft (15.2 m), but is
électrique. recommended for lengths greater than 50 ft (15.2 m).
When using shielded cable, isolate and tape the shield
Débrancher l'alimentation avant
at the sensor. Connect the shield to the COM sensor
de réaliser tout branchement
terminal on the A350A/B. (See Figure 2 for terminal
électrique. Tout contact avec des
location.) The A99BA-200C sensor, which includes
composants porteurs de tensions
shielded cable, is available if needed.
dangereuses risque d'entraîner
une décharge électrique et de Note: At the maximum cable lengths listed in Table 2,
provoquer des blessures graves, no more than 1F° (0.6C°) error in the sensed
voire mortelles. temperature will result due to wire resistance.
All wiring must conform to the National Electrical Table 2: Recommended Maximum Sensor
Code and/or local regulations. Cable Lengths
Note: For maximum electrical rating of control, see Wire Shielded Cable Length*
label inside the control cover or Specifications
Gauge Feet Meters
section. Use copper conductors only.
Consult the typical wiring diagrams (Figures 4 and 5) 14 AWG 800 244
for proper wiring and terminal designations. 16 AWG 500 152
18 AWG 310 94
20 AWG 200 61
22 AWG 124 38
* Values provided are for 2-wire stranded cable.
6 System 350 A350A/B Electronic Temperature Control Product/Technical Bulletin
Various A99B Series Temperature Sensors Table 3: Sensors Included With A350A/B
and mounting hardware are available for use Controls
with A350 Series Controls. See Tables 3 and
6. The sensor must be connected to the COM Control Sensor Included
and SEN terminals on the four-position Sensor lead length is 9-3/4 in. (0.25 m)
terminal strip located at the top left of the A350AA-1C A99BB-25C; Range: -40 to 212°F
printed circuit board (Refer to Figures 2, 4,
(-40 to 100°C)
and 5.). The sensors are not polarity sensitive.
A350AA-2C A99BC-25C; Range: -40 to 248°F
The sensor must be mounted so that it can (-40 to 120°C)
accurately sense the temperature of the
controlled medium. A350AA-3C A99BB-25C; Range: -40 to 212°F
(-40 to 100°C)
A350AB-1C No Sensor Included
A350AB-2C No Sensor Included
A350AB-5C No Sensor Included
A350BA-1C A99BB-25C; Range: -40 to 212°F
(-40 to 100°C)
A350BA-2C A99BC-25; Range: -40 to 248°F
(-40 to 120°C)
A350BB-1C No Sensor Included
For more information regarding sensor options
and installation, refer to the A99B Series
Temperature Sensors Product/Technical Bulletin
(LIT-125186).
Sensor
Shield (Connect
to COM on A350)
A350A/B Y350R S350A S350A S350A D350
120 VAC
Load Load Load Load
Figure 5: System 350 Powered by Y350R Module
System 350 A350A/B Electronic Temperature Control Product/Technical Bulletin 7
A djustments
Follow this procedure to set up the A350A/B for the Note: The A350A/B setpoint is factory calibrated at
desired operation. midscale to a tolerance of +/- 1F° (0.6C°).
Setpoint tolerance at the extreme ends of the
1. Remove the A350 cover by loosening the
setpoint ranges in relation to the printed scale
four captive cover screws.
can be +/- 3F° (1.7C°). The D350 Display
2. Set the heating/cooling jumper blocks to the Module is unaffected by this tolerance shift.
desired mode of operation. Position the jumper Use the D350 for the most accurate setpoint
blocks vertically for heating or horizontally for selection.
cooling. (See Figure 2.)
IMPORTANT: Verify that the heating/cooling
C heckout Procedure
jumper blocks are in the proper Follow this procedure to verify that the A350A/B is
position before powering the connected and functioning properly.
System 350 modules. If the
jumper blocks on the control or 1. Make sure installation and wiring connections are
staging modules are installed in according to job specifications before applying
the wrong position, the device power. (Refer to Figure 6 for an example of a
will activate the relay in response multistage application.)
to the opposite signal. The 2. Make the necessary adjustments and electrical
heating or cooling equipment will connections.
remain energized until the error 3. Put the system in operation and observe at least
is corrected. three complete operating cycles before leaving the
installation.
3. Adjust the differential potentiometer (DIFF) on the
A350 as needed. (Figure 6 is an example of a
multistage application.) The stage module’s offset T roubleshooting
and differential can be set independently. If the control system does not function properly, verify
(+) ON that the proper mode is selected on each module
(Heat/Cool, Direct Acting/Reverse Acting). Proceed as
Differential
follows to determine the cause of the problem:
ON
1. Make sure proper voltage is applied to the A350
Differential
OFF control.
OFFSET
Setpoint a. Connect a digital voltmeter (DVM) between
Temperature OFF the 24V and COM terminals located on the
OFFSET
OFF OFFSET
control’s left side terminal block (See Figure 2.)
Differential
OFFSET
ON = Energized
If an external transformer is used, select AC
OFF volts on the DVM and verify that the voltage is
OFF= De-energized
Differential
between 20 and 30 VAC.
(-) ON OFF
If a Y350R Power Module is used, select DC
Differential
volts on the DVM and verify that the voltage is
ON
between 16 and 38 VDC.
ON b. If the DVM reading is within the indicated
A350 S350A S350A S350A S350A voltage range, proceed to Step 2.
Stage 1 Stage 2 Stage 3 Stage 4 Stage 5
Cooling Heating c. If the DVM reading is not within the indicated
Jumper Set To voltage range, correct the wiring, replace the
Y350R, or replace the external transformer.
Figure 6: Typical Multistage
Heating/Cooling Application
4. Replace the cover, and secure in place with the
four captive screws. Move the setpoint dial to the
desired position.
8 System 350 A350A/B Electronic Temperature Control Product/Technical Bulletin
2. Check temperature sensor for proper resistance. 3. Check the A350 for proper operation.
a. Take an accurate, independent temperature Note: Steps 1 and 2 must be performed first.
reading at the sensor location.
a. Adjust the setpoint dial to at least 40°F (22°C)
b. Disconnect the sensor from the control. Using below the sensor temperature determined in
an ohmmeter, measure the resistance across Step 2.
the two sensor leads. Consult Figure 7 to
b. Increase setpoint by slowly turning the dial
verify sensor conformance.
until the control relay and LED turn On and
°F Temperature °C Off.
260
240 120 c. If the relay does not perform as indicated in
220 100 Table 4, replace the A350.
200
180 80
160 Table 4: A350 Relay Troubleshooting
140 60
120 N.O. Contact Setpoint
100 40 Action LED
80 Status Dial Setting*
60 20
40 Heating On Closed (Ts) = Sp - Diff
0
20
0 -20 Heating Off Open (Ts) = Sp
-20
-40 -40 Cooling On Closed (Ts) = Sp + Diff
500 700 900 1100 1300 1500 1700 1900 2100
Cooling Off Open (Ts) = Sp
Resistance (Ohms)
Figure 7: Temperature vs. Resistance *(Ts) is sensed temperature, and (Sp) is setpoint
Chart for the A99B Series Sensor temperature.
c. If the resistance varies substantially from the
optimal resistance for that temperature, the
sensor or wiring must be replaced.
R epairs and Replacement
Do not make field repairs or perform calibration.
Note: The sensor reading indicated by the D350 may Replacement controls and A99B Temperature Sensors
differ from thermometer readings due to sensor are available through the nearest Johnson Controls
tolerances, time constants, accuracy of representative. See Tables 5 and 6 for ordering
thermometer, and other factors. information.
O rdering
Table 5: System 350 Products
Item Product Code Description
Number
A350 Temperature Controls A350AA-1C Range: -30 to 130°F; Adjustable Differential: 1 to 30F°
(With Temperature Sensors) A350AA-2C Range: 90 to 250°F; Adjustable Differential: 1 to 30F°
A350AA-3C Range: -30 to 130°F; Adjustable Differential: 1 to 30F° (concealed setpoint)
A350BA-1C Range: -35 to 55°C; Adjustable Differential: 0.5 to 17C°
A350BA-2C Range: 30 to 120°C; Adjustable Differential: 0.5 to 17C°
A350 Controls Without A350AB-5C Range: 90 to 150°F; Adjustable Differential: 1 to 30F°
Sensors A350AB-1C Range: -30 to 130°F; Adjustable Differential: 1 to 30F°
A350AB-2C Range: 90 to 250°F; Adjustable Differential: 1 to 30F°
A350BB-1C Range: -30 to 130°F; Adjustable Differential: 1 to 30F°
Digital Temperature Setpoint D350AA-1C Fahrenheit Scale
Display Modules D350BA-1C Celsius Scale
On/Off Stage Modules S350AA-1C Fahrenheit Scale
S350AB-1C Celsius Scale
Slave Stage Modules S350CC-1C Dual Scale (°F and °C)
Proportional Stage Modules S350PQ-1C Dual Scale (°F and °C)
Power Module Y350R-1C 120/240 VAC, 50/60 Hz Input; Rectified Class 2, 24 VAC Output
System 350 A350A/B Electronic Temperature Control Product/Technical Bulletin 9
Table 6: System 350 Accessories
Item Product Code Description
Number
Enclosure BOX10A-600R Outdoor PVC sensor enclosure; includes wire nuts
Wall Mount Plate TE-6001-4 Includes sensor mounting clip
Cover T-4000-2644 For wall mount plate
Mounting Clip A99-CLP-1 Surface mounting clip for the A99B Temperature Sensor
Duct Mounting TE-6001-1 Duct-mounting hardware with handy box for A99B sensor
Duct Mounting TE-6001011 Duct-mounting hardware without handy box for A99B sensor
Conduit Adaptor ADP11A-600R 1/2 in. Snap-fit EMT conduit adaptor (box of 10)
Immersion Well WEL11A-601R For liquid sensing applications
Sun Shield SHL10A-603R For use with outside sensors in sunny locations
DIN Rail Sections BKT287-1R 12 in. (0.3 m) long
BKT287-2R 39-1/3 in.(1.0 m) long
DIN Rail End Clamp PLT344-1R Consists of two end clamps
Cables for Remote Mounting WHA29A-600R 3 ft (0.9 m) This can also be used to daisy chain S350 Stage Modules together.
of D350 Display Module WHA29A-603R 25 ft (7.6 m)
WHA29A-604R 50 ft (15.2 m)
S pecifications
Product A350A/B Electronic Temperature Control
Supply Voltage Y350R Power Module: Input: 120/240 VAC 50/60 Hz
Output: 24 VDC, unfiltered, 10 VA, Class 2
External Source: 24 VAC, 50/60 Hz Class 2 (20-30 VAC)
Note: Only one supply voltage source may be used.
Power Consumption 1.4 VA
Ambient Temperatures Operating: -30 to 150°F (-34 to 66°C)
Shipping: -40 to 185°F (-40 to 85°C)
Humidity 0 to 95% RH non-condensing; maximum dew point: 85°F (29°C)
Setpoint Adjustment Range See Table 5.
Differential Adjustment Range See Table 5.
SPDT Relay Output 120V 208 to 240V
Horsepower: 1/2 1/2
Full Load: 9.8A 4.9A
Locked Rotor: 58.8A 29.4A
Non-Inductive: 10A at 24 to 240 VAC
Pilot Duty: 125 VA at 24 to 240 VAC
Sensor Replaceable positive temperature coefficient sensor
Reference resistance: 1035 ohms at 77°F (25°C)
Material Case and cover: NEMA 1 high-impact thermoplastic
Agency Listings UL Listed, CCN XAPX, File E27734
UL Listed for Canada, CCN XAPX7, File E27734
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these
specifications, consult Johnson Controls Application Engineering at 1-414-524-5535. Johnson Controls, Inc. shall not be liable for damages
resulting from misapplication or misuse of its products.
Controls Group
507 E. Michigan Street
P.O. Box 423 Printed in U.S.A.
Milwaukee, WI 53201 www.johnsoncontrols.com
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