Compact Unit / Utility Heater
14
Operating Instructions and Owner’s Manual
L1
ACB COOL
ACB HEAT
ACC LOW
ACC
ACC
HTG ACC
CWB BLWR
THERMOSTAT
24 VAC (HOT)
FLAME SENSOR
PSW RTN
PSW OUT
HIL RTN
HIL OUT
SPK ELE
VLV RTN
VLV OUT
GND
24 V POWER (R)
MAN BLOWER (G)
HEAT 1 (W1)
GND PRO THER
24 V (COMM) (C)
24V
120 V
Transformer
Black
White
Combustion Blower
Black
Fan
White
Black
White
L1
(HOT)
N
(NEUTRAL)
EQUIPMENT
GROUND
Flame
Sensor
Flame Rollout
Switch
Air Switch
Red
Flame Rollout
Switch
Igniter
Gas Valve
Equipment Ground
Blue
Yellow
White
Blue
Black
Orange
Blue
LADDER DIAGRAM
1
2
1
5
2
1
6
3
4
R
G
W
C
R
G
W
C
R
G
W
C
2
Red
White
OPTIONAL THERMOSTAT INSTALLATION
IT IS RECOMMENDED TO USE 18AWG WIRE WHEN INSTALLING THE
THERMOSTAT. CONNECT ANALOG THERMOSTAT WIRING TO TERMINALS
‘R’ AND ‘W’ AS ILLUSTRATED ON THE SCHEMATIC DIAGRAM OR
CONNECT A DIGITAL/WiFi THERMOSTAT TO ‘R’ ‘W’ ‘C’ AS ILLUSTRATED.
NOTE: THERMOSTAT TERMINAL CONNECTIONS ARE MOUNTED ON THE
BACK PANEL OF THE HEATER.
EXTERNAL THERMOSTAT TERMINAL STRIP WANING:
DO NOT
CONNECT
LINE POWER TO THE THERMOSTAT TERMINAL STRIP.
24 Vac POWER
OPTIONAL FAN CONTROL
HEAT 1
COMMON
THERMOST
AT WIRING CONNE
CT
OR ON HEA
TER
NOTE -
IF ANY WIRE IN THIS APPLIANCE IS REPLACED,
IT MUST BE REPLACED WITH WIRE OF LIKE SIZE,
RATING AND INSULATION THICKNESS.
WARNING -
ELECTRIC SHOCK HAZARD CAN CAUSE INJURY
OR DEATH. UNIT MUST BE GROUNDED IN
ACCORDANCE WITH NATIONAL AND LOCAL
CODES.
DISCONNECT ALL POWER BEFORE SERVICING!
MAXIMUM LOAD NOT TO EXCEED
20VA AT 24V, CLASS 2
(2) S47 USED IN
75, 80 AND 125 ONLY
DESCRIPTION
KEY
COMPONENT
A3 CONTROL BOARD (PCB)
B3 MOTOR CIRCULATION
B6 MOTOR-COMBUSTION AIR INDUCER
C4 CAPACITOR-BLOWER MOTOR 1
C5 CAPACITOR-INDUCED DRAFT MOTOR
DL36 RELAY-RELAY (N/A TO THESE MODELS)
GV1 VALVE-GAS
S10 SWITCH-PRIMARY GAS
S18 SWITCH-COMB AIR BLOWER
S47 SWITCH-FLAME ROLLOUT
T1 TRANSFORMER-CONTROL
BLACK
WHITE
CHASSIS GROUND
CONNECT CHASSIS
GROUND TO
EARTH GROUND
L1
CMB
BLWR
ACC
ACC
BL
A
CK
WHITE
CAPACITOR USED IN 125 ONLY
C5
C4
BL
A
CK
WHITE (COM)
GREEN
B3
B6
A3
LINE VOLTAGE FIELD INSTALLED
ANALOG THERMOSTAT WIRING
A3
GND
BLUE
YELLOW
GV1
SPARK
ELECTRODE
FLAME
SENSOR
BLUE
BROWN
(1)S47
(2)S47 ORANGE
24VAC
HOT
FLAME
1 TO 6
P1 ON BOARD
PRES. SW.
RETURN
PRES. SW.
OUT
HIGH LIMIT
SW. RETURN
HIGH LIMIT
SWITCH
OUT
GAS VLV
RETURN
GAS VLV
OUT
CAPACITOR USED IN
75, 80 AND 125 ONLY
S18
BROWN
RED
S10
WIRING DIAGRAM
12
0V
BL
A
CK
BL
UE
WHITE
GREEN / YELL
O
W
24
V
Blue/Black
ANALOG
DIGITAL / WiFi
DIGITAL / WiFi THERMOSTAT WIRING
