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5 Electrical connections
Installation & Service Manual
Pump Wiring for a Heating Boiler
The heating boiler circulating pump must be pur chased
locally. The max i mum load for the pump switched by the
internal pump relay must not exceed 1 HP. The current draw
for a field installed 120 VAC pump MUST be add ed to the
boiler’s current draw to de ter mine the minimum wire size for
120 volt service.
TEMPERATURE
CONTROL
IGNITION
MODULE
MANUAL RESET
HIGH LIMIT (IF EQUIPPED)
TRANSFORMER
PUMP
RELAY
INTERMITTENT PILOT SYSTEM M9 CONTROL PANEL
IGNITION MODULE
TRANSFORMER
MANUAL RESET
HIGH LIMIT (IF EQUIPPED)
PUMP RELAY
TEMPERATURE
CONTROL
Figure 5-2_Control Panel Assembly 90-135,000 BTU/hr
Figure 5-3_Intermittent Pilot System 500,000 Btu/hr
Control Panel
Temperature Adjustment
Operating Temperature Control
NOTICE
The temperature controller is pre-set
at the factory with test settings. You
may need to adjust the settings to meet
your specific needs.
ƽ WARNING
Return water temperatures must not be
less than 140°F. If lower return water
temperatures are required, follow the
instructions for Low Temperature Bypass
Requirements or Three-Way Valves, see
page 29.
TABLE - 5B
AMP DRAW DATA FOR
STANDARD FIRING CODES
Firing Control
Model
Maximum
Total AMPs /
120VAC
M9
CB 315
.5
CB 360
.5
CB 399
.5
CB 500
.5
*F1
CW 90
1.5
CW 135
1.5
CW 180
1.5
CW 199
1.5
CW 225
1.5
CW 270
1.5
*F9
CW 315
1.5
CW 360
1.5
CW 399
1.5
CW 500
1.5
*
1.0 AMPs added for “PM” water heaters