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Troubleshooting Guide continued-
PROBLEM
Water at
faucet too hot
Insufficient
hot water
Boiler cycles
more than 5
times per day
in summer
CAUSE
Aquastat set too
high
Improper system
plumbing
Improper system
wiring
Aquastat setting
too low
Undersized
boiler with no
priority to
domestic hot
water
Peak use of hot
water is greater
than tank
storage capacity
Faulty tank
aquastat
Excessive
demand
Faulty aquastat
Boiler high limit
set too low
30
SOLUTION
Lower aquastat
setting. See Section
VII.
Compare plumbing to
Section V: Water
Connections.
Compare wiring to
Section VI: Electrical
Connections.
Adjust aquastat to
higher setting. See
Section VII.
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.
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