Troubleshooting Guide, Important Notice, Problem, Causes

TROUBLESHOOTING GUIDE

IMPORTANT NOTICE

These instructions are primarily intended for the use of qualified personnel specifically trained and experienced in the installation of this type of heating equipment and related system components. Installation and service personnel may be required by some states to be licensed. Persons not qualified shall not attempt to install this equipment nor attempt repairs according to these instructions.

PROBLEM	CAUSES	SOLUTIONS
1)When room thermostat is turned on,	1)No power to the boiler.	1)Check circuit breakers, disconnect
boiler does not operate.		switch. Make sure power is on.
	2)Defective room thermostat or discon-	2)Check continuity on thermostat and
	nected wire in thermostat circuit.	wiring circuit. Replace thermostat, or
		repair wiring connections.
	3)Defective transformer.	3) Check secondary voltage. If no 24V,
		replace transformer.
	4)Defective pump relay.	4) Check relay coil or contacts. Replace
		as required.
	5)Defective pump.	5) Replace pump.

2)When room thermostat is calling for	1)For standing pilot models pilot,	1)Light pilot burner. (Follow lighting
heat, pump is on, but burners will not	burner not lighted.	instructions on rating plate.)
turn on.	2)If pilot burner will not stay lighted,	2)Check thermocouple MV generation.
	thermocouple or gas valve may be	If less than 25MV (open circuit), re-
	defective.	place thermocouple. If between 25-
		35 MV, replace gas valve.
	3)Gas knob in "Pilot" position.	3)Turn knob to "ON" position.
	4)For automatic ignition models,	4)Turn gas knob to "ON". If ignition
	gas valve knob is in "off" position.	module locks out, reset by interrupt-
		ing power to boiler.
	5)Vent switch is open.	5) Check for blockage of venting system
		or disconnected vent piping. After
		problem is corrected push button to
		reset, or replace single-use type vent
		switch.
	6)Roll-out switch is open.	6)Check for blockage of flue or sooted
		heat exchanger. After problem is
		corrected push button to reset or re-
		place single use type roll-out switch.
	7)High limit is open.	7)Setting may be too low. Check water
		flow and adjust setting to obtain 20-
		30°F temperature rise.
	8) Fast Response Temperature	8)Red LED on circuit board will be ON
	Sensor probe is defective.	to indicate a loose sensor connection
		or a shorted sensor. Check terminal
		connectors or replace sensor as re-
		quired.
		NOTE: Red LED will also be ON if
		sensor temperature exceeds 300°F or
		drops below - 20°F. It will turn OFF
		when sensor temperature returns to
		the proper range. Yellow LED will be
		ON if temperature exceeds 240°F. It will
		turn off when sensor temperature falls
		below 180°F. When either Red or Yel-
		low LED is ON, boiler will be shut down.
	9) Fast Response Temperature	9)Check voltage across output and
	sensor board is defective.	common terminals. If no 24V is pres-
		ent, replace board.

TROUBLESHOOTING GUIDE

IMPORTANT NOTICE

PROBLEM

CAUSES

SOLUTIONS

1)When room thermostat is turned on,

1)No power to the boiler.

1)Check circuit breakers, disconnect

boiler does not operate.

switch. Make sure power is on.

2)Defective room thermostat or discon-

2)Check continuity on thermostat and

nected wire in thermostat circuit.

repair wiring connections.

3)Defective transformer.

replace transformer.

4)Defective pump relay.

as required.

5)Defective pump.

5) Replace pump.

2)When room thermostat is calling for

1)For standing pilot models pilot,

1)Light pilot burner. (Follow lighting

heat, pump is on, but burners will not

burner not lighted.

instructions on rating plate.)

turn on.

2)If pilot burner will not stay lighted,

thermocouple or gas valve may be

If less than 25MV (open circuit), re-

defective.

place thermocouple. If between 25-

35 MV, replace gas valve.

3)Gas knob in "Pilot" position.

3)Turn knob to "ON" position.

4)For automatic ignition models,

4)Turn gas knob to "ON". If ignition

gas valve knob is in "off" position.

ing power to boiler.

5)Vent switch is open.

or disconnected vent piping. After

problem is corrected push button to

switch.

6)Roll-out switch is open.

heat exchanger. After problem is

7)High limit is open.

flow and adjust setting to obtain 20-

30°F temperature rise.

8) Fast Response Temperature

Sensor probe is defective.

quired.

NOTE: Red LED will also be ON if

drops below - 20°F. It will turn OFF

when sensor temperature returns to

the proper range. Yellow LED will be

below 180°F. When either Red or Yel-

9) Fast Response Temperature

9)Check voltage across output and

sensor board is defective.

ent, replace board.