Lochinvar 500, 90 Temperature Adjustment, Pump Wiring for a Heating Boiler, Notice

5Electrical connections

Pump Wiring for a Heating Boiler

The heating boiler circulating pump must be purchased locally. The maximum 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 added to the boiler’s current draw to determine the minimum wire size for 120 volt service.

TABLE - 5B

AMP DRAW DATA FOR

STANDARD FIRING CODES

		Maximum
Firing Control	Model	Total AMPs /
		120VAC
	CB 315	.5
M9	CB 360	.5
	CB 399	.5
	CB 500	.5
	CW 90	1.5
	CW 135	1.5
*F1	CW 180	1.5
	CW 199	1.5
	CW 225	1.5
	CW 270	1.5
	CW 315	1.5
*F9	CW 360	1.5
	CW 399	1.5
	CW 500	1.5

*1.0 AMPs added for “PM” water heaters

IGNITION MODULE

TEMPERATURE

CONTROL

PUMP RELAY

MANUAL RESET

HIGH LIMIT (IF EQUIPPED)

TRANSFORMER

INTERMITTENT PILOT SYSTEM M9 CONTROL PANEL

Figure 5-2_Control Panel Assembly 90-135,000 BTU/hr

Installation & Service Manual

TEMPERATURE

CONTROL

IGNITION

MODULE

PUMP

RELAY

MANUAL RESET

HIGH LIMIT (IF EQUIPPED)

TRANSFORMER

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.
	Return water temperatures must not be
￿ WARNING
	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.

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