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PART 4 – HEATER CONTROL AND WIRING
A. CONTROL
A surface mounted control is provided and mounted inside of the control access compartment. There is an
insulation blanket under the control access cover to ensure accurate readings of water temperature. The control is
factory set at 120
o
F for your safety (see scald danger warning above). The differential is fixed at 3
o
to 5
o
(not
adjustable).
B. WIRING
Wiring is to be done in accordance with all applicable local and state codes. Turn off all power related to the boiler
starting and wiring procedures. It is recommended that a disconnect switch be installed between the boiler control
and water heater.
PART 5 – OPERATING THE HEATER
Boiler high limit should be at least 20
o
F higher than the heater temperature. Set the low limit of the boiler control
at the minimum setting – this will call the burner on to satisfy the tank control.
We recommend a water heater temperature setting of 120
o
F. However, a lower temperature setting may be
required to comply with local and state codes for normal operation. The differential is fixed at 3
o
to 5
o
. You may
prefer a setting of either higher or lower water temperature. A mixing valve in conjunction with a high temperature
setting may be used for high demand applications (spas, hot tubs, whirlpools).
If draining of the heater is necessary, open the temperature and pressure valve or a hot water tap to prevent
vacuum buildup in the tank and piping.
Risk of scald injury increases as you increase water temperature.
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