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6-pIN CONNECTOR gCI-3A (23L53) CONTROL BOARD
FLAME
SENSOR
MAXIMUM LOAD NOT TO EXCEED
20VA AT 24V, CLASS 2.
COM
S18
DISCONNECT ALL POWER
BEFORE SERVICING.
FOR PROPER GROUNDING,
REFER TO LOCAL CODES.
ORANGE
S10
DESCRIPTION
1(S47)
KEY
COMPONENT
A3
CONTROL, BURNER, IGNITION
B3
MOTOR, FAN
SPARK
B6
MOTOR, COMBUSTION AIR BLOWER
6VI
VALVE, GAS
ELECTRODE
510
LIMIT, PRIMARY, GAS
518
SWITCH, COMB, AIR BLWR PRONE
(1) S47
SWITCH-FLAME ROLLOUT 1
(2) S47
SWITCH-FLAME ROLLOUT 2
T1
TRANSFORMER CONTROL
T1 24V
120V
BLACK
L1
WHITE
N
CWB
BLWR
L1
EQUIPMENT
GROUND
wIRINg SCHEMATIC FOR UNITS wITH
BLUE
24V POWER (R)
A3
R
24VAC
HOT
F5
ONLY WITH
MANUAL FAN
BLOWER (G)
BROWN
PSW
G
5
RTN
RED
PSW
2
HEAT 1 (W1)
OUT
W
HIL
1
RTN
BLUE
6 HIL
OUT
2(S47)
YELLOW
VLV
3
RTN
GV1
VLV
4
OUT
GND PROGRAMMABLE
THERMO.
24V COMMON (C)
C
GND
YELLOW
LINE VOLTAGE FIELD INSTALLED
CLASS II 24 VAC FIELD INSTALLED
DENOTES OPTIONAL COMPONENTS
A3
HTG
ACB
ACB
ACB
ACC
ACC
ACC
LOW
HEAT
COOL
B6
B3
enerco | Compact Unit Heater
OPTIONAL THERMOSTAT INSTALLATION
IT IS RECOMMENDED TO USE 18AWG WIRE
WHEN INSTALLING THE THERMOSTAT.
CONNECT THERMOSTAT WIRING TO
TERMINALS 'R' AND 'W' AS ILLUSTRATED ON
THE SCHEMATIC DIAGRAM.
NOTE: IF ANY OF THE ORIGINAL WIRE AS
SUPPLIED WITH THE APPLIANCE MUST BE
REPLACED, IT MUST BE REPLACED WITH
WIRING MATERIAL HAVING A TEMPERATURE
RATING OF AT LEAST 105
C.
°
WARNING-
ELECTRIC SHOCK HAZARD, CAN CAUSE INJURY
OR DEATH, UNIT MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES.
SET THERMOSTAT HEAT ANTICIPATION
ROBERTSHAW VALVE............ .4
WIRE DIAGRAM
GAS FIRED UNIT HEATER DSI-IGNITION
MHU45LP
MHU45NG
HSU45LP
HSU45NG
MHU75LP
MHU75NG
HSU75LP
HSU75NG
60006
REV.
LADDER DIAgRAM
14
operating Instructions and owner's Manual
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