Burnham 79A, AL-26A, 53A, 40A manual VII. Trouble Shooting, Problem Cause Solution

VII. Trouble Shooting

PROBLEM	CAUSE	SOLUTION
No hot water at faucet	Boiler does not operate	Refer to boiler installation instructions
		Check main service switch
		Check fused disconnect
	Circulator does not operate	Check power supply
		Check shaft coupling
	Improper aquastat setting or calibration	Turn tank aquastat to higher setting
	Zone valve does not open (if used)	Check power supply
	Electrical problem (relay, wiring, fuse, etc. )	Check fuse and replace
		Check circuit breaker and reset (if applicable)
		Check power supply
	Scale build-up	If boiler, circulator and tank are operating satisfactorily, coil
		may have scale coating. See Section VI: Service Instructions
	Clogged cold water filter or boiler supply	Clean or replace filter or strainer
	strainer (if used)
Insufficient hot water	Aquastat setting too low	Adjust aquastat to higher setting
	Undersized boiler with no priority to	Rewire for priority
	domestic hot water
	Peak use of hot water is greater than tank	Determine peak usage and compare to tank volume
	storage capacity
	Scale build-up	If boiler, circulator and tank are operating satisfactorily, coil
		may have scale coating. See Section VI: Service Instructions
	Faulty tank aquastat	Replace aquastat
Water at faucet too hot	Aquastat set too high	Lower aquastat setting
	Improper system plumbing	Compare plumbing to Section III: Piping
	Improper system wiring	Compare wiring to Section IV: Electrical
Boiler cycles more	Excessive demand	Reduce demand or consider larger tank
than 5 times per
day in summer	Faulty aquastat	Replace aquastat
	Boiler high limit set too low	Increase boiler high limit setting
	Scale Build-up	If boiler, circulator and tank are operating satisfactorily, coil
		may have scale coating. See Section VI: Service Instructions

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