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Electrical Connections continued-
The thermostat switch is a single pole, single throw device. The
field connections shall be used as a control for one leg of the
electrical circuit. The thermostat switch can be used in the range of
24 to 480 volts with a maximum current load of 15 amps. Any and
all wiring shall be sized and installed to satisfy the voltage and
amperage used. All wiring shall be done in accordance with all
applicable local and state codes.
GENERAL INSTALLATIONS
If a circulator is used to control the heating fluid flow from the
water heater to the boiler, a zone relay is required between the
water heater thermostat and the boiler. Connect the white wire on
the water heater to one leg of the circulator. The second leg of the
circulator is to be connected to "L2" (120V neutral). Connect the
white wire on the water heater to one leg of the zone relay. The
second leg of the zone relay is to be connected to "L2" (120V
neutral). The contact side of the zone relay is to be connected to
the boiler operating control (see figure 5). Connect the black wire
on the water heater to "L1" (120V hot). These connections enable
water heater thermostat to control the circulator, the zone relay,
and the boiler operating control.
Figure 5 – Electrical Connection with Circulator
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