Troubleshooting Guide - Lochinvar EGS-I&S-01 Installation & Service Manual

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