Lochinvar 399, 999 - 750 service manual Operation, C, For Your Safety Read Before Operating, D, E

Installation and Service Manual

Field Provided Jumper Wire

Required for Mode 3 Operation

Remote On/Off

						Remove Factory Jumper
						if Jumper Wire is Added.
HeatDem1				HeatDem2
STAGE 1		STAGE 2		STAGE 3		STAGE 4
1C	1NO	2C	2NO	3C	3NO	4C	4NO
	CONTINUOUS			INTERMITTENT

		A1	A2		A3	B1	B2	B3
					Figure 42B
CONNECTIONSFIELD	REMOTE ON/OFF BOILER OR WATER HEATER
	Priority or O.A.
	Lockout Override
	Remote On/Off
	(Optional)
	HeatDem1					HeatDem2
	STAGE 1			STAGE 2		STAGE 3		STAGE 4
	1C	1NO		2C	2NO	3C	3NO	4C	4NO
		CONTINUOUS				INTERMITTENT
		A1		A2	A3	B1	B2	B3

Figure 42C

BOILER WITH DOMESTIC HOT WATER PRIORITY OR I/O RESET OVERRIDE

FIELDCONNECTIONS	STAGE 2
	STAGE 1
	HeatDem1				HeatDem2
	STAGE 1		STAGE 2		STAGE 3		STAGE 4
	1C	1NO	2C	2NO	3C	3NO	4C	4NO
		CONTINUOUS			INTERMITTENT
		A1	A2	A3	B1	B2	B3

Figure 42D

2 STAGE (High/Low Fire) BOILER OR WATER HEATER

CONNECTIONS	STAGE 4
	STAGE 3
	STAGE 2
FIELD	STAGE 1
	HeatDem1				HeatDem2
	STAGE 1		STAGE 2		STAGE 3		STAGE 4
	1C	1NO	2C	2NO	3C	3NO	4C	4NO
		CONTINUOUS			INTERMITTENT
		A1	A2	A3	B1	B2	B3

Figure 42E

4 STAGE (High/Low Fire) BOILER OR WATER HEATER

HeatDem1			HeatDem2
STAGE 1	STAGE 2		STAGE 3		STAGE 4
1C 1NO	2C	2NO	3C	3NO	4C 4NO
CONTINUOUS			INTERMITTENT
A1	A2	A3	B1	B2	B3
OK				OK
COM		FAIL	COM		FAIL

CONTINUOUSLY INTERMITTENTLY

MONITORED MONITORED

EXAMPLE DEVICES:

HIGH/LOW GAS, AUX. HI-LIMIT

AUX. LIMITS, EXT. FLOW SWITCH

Figure 42F

FIELD INSTALLED SAFETY DEVICES

OPERATION

FOR YOUR SAFETY READ BEFORE OPERATING

A.This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

B.BEFORE OPERATING, smell around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle to the floor.

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