Install Instructions

33
Installation & Service Manual
5 Electrical connections
This appliance is wired for 120 VAC service. The appliance,
when installed, must be electrically ground ed in accordance
with the requirements of the authority having jurisdiction or
in the absence of such re quire ments, with the latest edition
of the National Electrical Code ANSI/NFPA No. 70. When
the unit is in stalled in Canada, it must conform to the CSA
C22.1, Ca na di an Electrical Code, Part 1 and/or local Electrical
Codes.
1. All wiring between the appliance and field
in stalled devices shall be made with type T wire
[63° F(35° C) rise].
2. Line voltage wire exterior to the appliance must be
enclosed in approved conduit or approved metal clad
cable.
3. The pump must run continuously when the appliance is
being fired.
4. To avoid serious damage, DO NOT en er gize the
appliance until the system is full of water. Serious
damage may result.
5. Provide the unit with proper overload protection.
6. Install a wall thermostat on the inside wall. DO NOT
install the thermostat in an area affected by drafts,
sunlight, light fixtures, hot or cold water pipes or near a
fireplace. See “Room Thermostat or Remote Thermostat
Connection to Terminal Strip” (this page), for prop er
wiring con nec tion.
Room Thermostat or Remote Thermostat
Connection to Terminal Strip
A room thermostat or remote temperature control may be
connected to the boiler. The room ther mo stat should be
installed on an inside wall, away from the influences of drafts,
hot or cold water pipes, lighting fixtures, televisions, sun rays
or fire plac es. Follow the manufacturers instructions supplied
with the ther mo stat for proper installation and ad just ment.
The boiler is equipped with a terminal strip on the left side of
the control panel to allow easy connection (FIG. 5-1, inset A).
Remove the jumper between the R1 and W1 terminals on
the terminal strip. Refer to the chart in this section (Table
5A) to determine maximum allowable length and wire gauge
recommended to connect the switching con tacts of the room
thermostat to the R1 and W1 terminals on the terminal strip.
Connection to the terminal strip will allow the room thermostat
to make and break the 24VAC boiler control circuit turning
the boiler on and off based on the room ambient temperature
re quire ments. Set the boiler operating temperature control as
described in Temperature Control Settings on page 36.
B
IMG00278
A
Figure 5-1_Terminal Strip Connections
Auxiliary Power Venting Connection to
Terminal Strip
A terminal connection strip is provided for ease of connection
of auxiliary power venting systems, see FIG. 5-1, inset B. A field
supplied power venter can be interlocked into the appliance’s
control circuit via a 24 VAC relay, which will be powered from
this location when a call for heat has been established. A device
proving switch can be interlocked back to the appliance to
ensure its operation before the appliance is allowed to fire. For
additional information, reference the wiring diagram on page
49 of this manual.
TABLE - 5A
TERMINAL STRIP WIRING
Wire Gauge
Allowable Length
Maximum
12 GA 100 ft.
14 GA 75 ft.
16 GA 50 ft.
18 GA 30 ft.