16. Turn on the electric power and gas supply to the boiler.
17. Reset the low pressure switch. For instructions, see
Resetting the gas high / low pressure
.
18. Tune the gas valve. For instructions, see
Adjusting the gas valve (EX 400, EX 500) on page
.
7.3 Replacing the fan, gas valve, and burner in EX 750
and EX 800 models
This section documents the following maintenance procedures for EX 700 and EX 850 models:
Replacing the fan
Replacing the gas valve
Replacing the burner.
Fan
Mixing device
High pressure switch
Three- (3) wire Molex plug
96
Section: Service and maintenance
Содержание EX Series
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