8
Field wiring
ELECTRICAL SHOCK HAZARD – For
your safety, turn off electrical power supply
before making any electrical connections
to avoid possible electric shock hazard.
Failure to do so can cause severe personal
injury or death.
Wiring must be N.E.C. Class 1.
If original wiring as supplied with boiler
must be replaced, use only type 105°C
wire or equivalent.
Boiler must be electrically grounded as
required by National Electrical Code
ANSI/NFPA 70 – latest edition.
Installation must comply with:
1. National Electrical Code and any other national, state,
provincial, or local codes, or regulations.
2. In Canada, CSA C22.1 Canadian Electrical Code Part 1,
and any local codes.
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
WARNING
NOTICE
CAUTION
IMG00269
HIGH VOLTAGE
JUNCTION BOX
Figure 8-1 Remove Metal Junction Box Cover
Low voltage connections
1. Route all low voltage wires through the knockouts in the
bottom front right side, just under the control panel, as
shown in FIG. 8-2.
2. Connect low voltage wiring to low voltage connection board
as shown in FIG. 8-3 on page 48 of this manual and the
boiler wiring diagram.
IMG00246
LOW VOLTAGE
CONNECTION BOARD
LOW VOLTAGE
WIRING KNOCKOUTS
Figure 8-2 Routing Field Wiring
46
Installation & Service Manual
Do not run low voltage wires next to high
voltage wires in the same conduit.
NOTICE
Line voltage connections
1. Remove the cover of the metal junction box as shown in
FIG. 8-1.
2. Connect 120 vac power wiring using wire nuts (field
supplied) to the labeled line voltage terminal wires in the
junction box.
3. Provide and install a fused disconnect or service switch
(15 amp recommended) as required by the code.
4. Wire the boiler pump (maximum 1.8 amps) to the
labeled wires inside the junction box.
5. When connecting a domestic hot water (DHW) pump
(maximum 1.8 amps), connect using field supplied wire
nuts to the labeled wires inside the junction box.