Rheem 136-1826 installation instructions If okay replace ignition module

Electrical continued
3.	Pilot lights -	Main burner cyles.
		Intermittent Ignition Module
			• Poor ground connection	Check ground connection.
				Install or replace.
4.	Pilot lights -	Main burners do not light.		Check for spark
				1. Spark stays on while pilot is on.
				• Check for loose ignition wire.
				• Check for poor ground.
				• Check flame coverage of both
					spark and grounded electrodes.
				• If okay replace ignition module
				2. Spark goes out and pilot stays on:
				• Check voltage at MV; MV/PV
					terminals.
				- Voltage @ 24 VAC - replace
					main gas valve.
				- Voltage not at 24 VAC - replace
					module.
				Voltage should read 24 VAC.
				If valve does not open:
				1st operator - replace valve
				2nd operator- replace operator
				assembly.
		3.	Mechanical Modulating Valve.	Check dial setting on valve and set to
				meet	requirements.
				Unit keeps cycling on electrical limits -
				adjust temperature setting on valve.
		4.	Failure to pump.	Pump not primed.
				Pump rotation wrong direction.
				•	Check motor leads- reverse
				to obtain proper rotation.
				Speed too low-
				•	Check for proper voltage at
				motor.
				Total head too high.
		5.	Pump capacity insufficient.	Check for
				•	Air leaks in suction line.
				•	Clogged impeller.
				•	Strainer clogged.
				•	Excessive suction lift.
				•	Insufficient positive suction
				head.
				Total head greater than design.
				Worn impeller.
		6.	Rapid coupling wear.	Misaligned or bent shaft,
				Sagging motor mounts.
		7.	Pump loses prime.	Check for air leaks.
				Check water seal in stuffing box.
				Check suction lift and pump design
				curves.
		8. Overload.		Check head on pump if too low
				throttle discharge.
		9.	Mechanical noise.	Check alignment. Correct if found.
				Check for vapor binding and reduce
				temperature to meet design.
				Check shaft and bearings.
				Check piping for correct alignment
				and support.

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