Installation / Operation Instruction Manual

10
ELECTRICAL CONNECTIONS
Before any electrical connections are made, be sure that the water heater is full
of water and that the manual shut-off valve in the cold water supply line is
open. Check the rating plate and wiring diagram before proceeding. All wiring
shall be done in accordance with all applicable local and state codes. The
thermostat incorporates a manual reset temperature-limiting device. Please
refer to the Service section for operation of the manual reset.
The thermostat incorporates a manual adjustable temperature indicator to
change the potable water temperature. Please refer to the adjusting thermostat
temperature section for proper instruction for adjusting water temperature.
Turn off all power related to the boiler and heating system before proceeding
with the electrical connections. It is recommended that a disconnect switch be
installed between the boiler and the indirect water heater. This will enable safe
operation and access for service, thermostat adjustment or over temperature
reset.
The thermostat switch is a 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. If you should have any questions, please contact the Service
Department of the manufacturer listed on the rating plate.
Electrical Connections For General Installations:
Connect the wire from the boiler, zone valve or circulator, to the black lead in
the junction box on the indirect water heater. The white lead should be
connected to the return leg to the boiler, zone valve or circulator. This will
enable the indirect thermostat to control the boiler, zone valve or circulator.
If a zone valve is used to control the heating fluid flow, wire the
thermostat from the indirect water heater through the zone valve. This will
enable the indirect water heater thermostat to simulate a single throw wall
thermostat. For example, a 24V zone valve should have the ungrounded leg
wired through the thermostat of the indirect water heater. This will enable the
indirect thermostat to control the zone valve. This should be used if the boiler
is actuated by a zone valve.