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5
Electrical connections
General information
ELECTRICAL SHOCK HAZARD – For your
⚠WARNING
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.
A 120 VAC, 15 Amp, 1 ph, 60 Hz circuit is required for
operation of the appliance controls.
The appliance, when installed, must be electrically grounded and
bonded in accordance with the requirements of the authority
having jurisdiction or in the absence of such requirements, with
the latest edition of the National Electrical Code ANSI/NFPA
No. 70. When the unit is installed in Canada, it must conform
to the CAE C22.1, Canadian Electrical Code, Part I and/or local
Electrical Codes. Multiple units connected in a Cascade must
be grounded to the same ground connection.
1.
All wiring between the appliance and field installed
devices shall be made with type T wire [63°F (35°C)
rise].
2.
All line voltage wire exterior to the appliance must be
enclosed in approved conduit or approved metal clad
cable.
3.
The circulating pump must run continuously when
the appliance is being fired.
4.
To avoid serious damage, DO NOT energize the
appliance until the system is full of water. Ensure that
all air is removed from the heat exchanger and piping
before beginning initial operation.
may result if the appliance is operated without proper
flow.
5.
Provide the appliance with proper overload protection.
DO NOT block access to the electrical cover
NOTICE
plate when installing electrical conduit.
Figure 5-1_Control Panel Component Location
LOW VOLTAGE
BOARD
44
Serious damage
MAIN CONTROL
BOARD
TRANSFORMER
ON/OFF
SWITCH
Installation & Operation Manual
3-way automatic bypass valve wiring
If the piping loop was disassembled for shipping or needs to be
fitted with an outdoor enclosure, connection or disconnection
of the 3-way automatic bypass valve will be required. Wiring
connections should be made to the appropriately numbered
terminals on the 3-way automatic bypass valve as follows:
TABLE-5A
3-Way Automatic Bypass Valve Wiring
FIELD
Wire
Color
3-Way Valve
1
Blue
3
Black
4
Red
Note: Orientation of the valve connections may vary from what
is shown. Care should be taken to ensure wires are connected to
the appropriate terminals, see FIG. 4-8 on page 42 of this manual.
Power must be removed and the clutch
⚠WARNING
button must be depressed before attempting
to manually operate the valve, or damage to
the 3-way valve may occur.
TABLE-5B
Remote Wire Connection
Wire
Gauge
12 GA
14 GA
16 GA
18 GA
LWCO/SWITCH
LOCATION
WIRE HARNESS
CONNECTIONS
BREAKER
LOCATION
OPTIONAL
AUXILIARY
HIGH LIMIT
LOCATION
RELAY
FACTORY
Low Voltage
Board
COM
Terminal #7
CW
Terminal #6
CCW
Terminal #5
Maximum
Allowable Length
100 ft.
75 ft.
50 ft.
30 ft.
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