EGS-I&S-01
12
TROUBLE SHOOTING GUIDE
PROBLEM CAUSE
SOLUTION
Boiler does not operate
Refer to boiler installation instructions
Check main service switch
Check fused disconnect
Circulator does not operate
Check power supply
Replace as necessary
Improper aquastat setting calibration
Turn tank aquastat to appropriate or setting
Zone valve does not open (if used)
Check power supply
Replace as necessary
Electrical problem (relay, wiring, 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 Maintenance
Clogged cold water filter or
Clean or replace filter or strainer
boiler supply strainer (if used)
Aquastat set too high
Lower aquastat setting. See Operating Instructions
Improper system plumbing
Compare to plumbing in Water Connections
Improper system wiring
Compare to wiring in Electrical Connections
Aquastat setting too low
Adjust aquastat to higher setting.
See Operating Instruction
Undersized boiler with no
Rewire for priority
priority to domestic hot water
Peak use of hot water is greater
Determine peak usage and compare to tank capacity
than tank storage capacity
Faulty tank aquastat
Replace aquastat
Excessive demand
Reduce demand or consider larger tank
Faulty aquastat
Replace aquastat
Boiler high limit set too low
Increase boiler high limit setting
No hot water
at faucet
Water at
faucet too
hot
Insufficient
hot water
Boiler cycles
more per day
in summer
2/06-Printed in USA
