Install Instructions

16
A. WIRING REQUIREMENTS
1. All wiring must be a minimum of 18 gauge and
installed in accordance with:
a. U.S.A. - National Electrical Code and any other
national, state or local code requirements having
jurisdiction.
b. Canada - C.S.A. C22.1 Canadian Electrical Code
Part 1 and any other national, provincial and local
code requirements having jurisdiction.
2. If original wire supplied with appliance must be
replaced, Type 90ºC or its equivalent must be used.
3. Refer to control component instructions packed with
boiler for application information.
4. An optional service switch may be installed in water
heater electrical circuit. This switch would only shut
off the water heater, not the home heating system. Do
not shut off water heater if there is a chance of
freezing.
5. All electrical contacts shown do not have power
applied - off the shelf condition. See Figures 5.1
through 5.9.
B. CIRCULATORS
Priority relay must be sized for total amp draw of all
circulators.
C. ZONE VALVES
Transformer must be sized for maximum load of all zone
valves.
D. SNAP SET CONNECTION
1. For easy wiring between water heater thermostat and
boiler controls see Installation Wiring section Figures
5.1 through 5.9.
2. Make sure snap set is firmly snapped together after
wiring.
Electrical shock hazard can cause severe personal
injury, death or substantial property damage.
Disconnect power before installing and/or servicing.
WARNING
4. INSTALLATION – WIRING
INSTALLATION - WIRING