Technical information

Remote Air Cooled Condenser14
Setpoint adjustment
Setpoint adjustment is defined as the temperature at which the relay de-energizes. Use the setpoint dial
on the front of the controller to adjust the setpoint.
Differential adjustment
Differential adjustment is defined as the change in sensor temperature between energizing and de-
energizing the relay. Use the potentiometer marked “DIFF” to adjust the temperature differential.
Adjusting the A350A/B
Set the A350A/B for the desired operation:
1. Remove the A350A/B cover by loosening the four cover screws.
2. Set the heating/cooling jumper blocks to the desired mode of operation. Position the jumper
blocks vertically for heating or horizontal for cooling.
Note: Verify that the heating/cooling jumper blocks are in the proper position before
powering the System A350A/B modules. If the jumper blocks on the control or
staging modules are installed in the wrong position, the device will activate the relay
in response to the opposite signal. The heating or cooling equipment will remain
energized until the error is corrected.
Electrical Hazard:
Disconnect power to avoid possible electrical shock or
equipment damage. More than one disconnect may be required to completely de-
energize the equipment.
Note: Make all wiring connections in accordance with all national and local codes.
Use copper conductors only. Do not exceed electrical ratings.
3.Adjust the differential potentiometer (DIFF) on the A350 to 3°F.
4. Replace the cover, and secure in place with the four captive screws. Move the setpoint dial to the
desired position.
A350A/B Board Layout and Terminal
Locations
S350A/B Board Layout and Terminal
Locations
Setpoint Dial
24V
COM
VDC
SEN
DIFF
(Differential
Potentiometer)
Relay LED
Indicator
Module
Connector
Heat
Cool
COM NO
NC
Cover
screw
Jumper
Block
Relay
DIFF
(
Di
ff
erential
Potentiometer)
Module
Connector
Jumper
Block
Heat
Cool
Module
Connector
Offset
Potentiometer
Relay LED
Indicator
Cover
screw
NC
COM
NO
Relay