Service manual

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL
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10.5 Low Voltage Thermostat with Multiple Heaters (Models UHA[X][S]300 - 400)
NL
Gnd.
L
N
Gnd.
120V-60 Hz
NOTE: If both the heat and fan only operations are to be used, two relays will be required per group of heaters.
supply circuit
Low Voltage Thermostat
RC
W
G
Y
1
2
3
4
5
6
COIL COIL
Black
Black
White Red
Transformer Relay
FRONT VIEW BACK VIEW
NL
Gnd.
Heater 2
Heater 1
Purple
Red/Yellow
Model Relay Type Relay Part Number Max. Number of Heaters
UHA[X][S]300 - 400 DPST 90436300 2