26
Heater Control Panel (Optional)
1. Carefully plan the location of the control panel. Measure the factory supplied probe
cord length. Do not attempt to change the cord length.
2. After selecting the installation site, mount the control panel with four 5/16” (field
supplied) bolts through the mounting feet on the enclosure.
3. The main incoming power hub and the main power termination points are sized for
wires based on the total nameplate kW and voltage. The actual load for a particular
installation may be less. Either compute the actual load on the heater control panel
(the total kW of all the heaters connected to it) or use the nameplate rating to
determine the wire size required. The field supplied branch circuit disconnect switch
and the branch circuit protective devices (fusing or circuit breaker) should be sized
per NEC or local code requirements.
4. Connect the incoming power wire conduit to the incoming power hub provided on the
control panel. Make sure the connection is water tight and secure. Pull the incoming
power wire into the control panel enclosure and make connections per the control
panel-wiring diagram.
5. Connect the heater power wire conduit(s) to the heater power wire hub(s) provided on
the control panel. Make sure the connection is watertight and secure. Pull the heater
power wire into the control panel enclosure and make the connections per the control
panel wiring diagram. Conduit connections to multiple heaters should run until the
conduit terminates at the last heater. Jumpering from one heater to the next is not
recommended.
6. If the heater has a thermal cutoff, wire the cutoff back to the terminal block in the
panel per the wiring diagram. This is a Class 1 circuit and can be in the same conduit
as the power wiring. If there are two or more heaters, connect the cutoffs in series as
shown in the wiring diagram.
7. If alternative conduit hubs are drilled, or if supplied hubs are not used, replace the
plastic protective caps inside the hubs with steel plugs.
8. If leakage or condensation is likely to occur in the conduit runs leading to the control
panel, install a drain in the bottom of the control panel and form a conduit loop.
9. Verify operation by following the “Stand Alone BAC Heater Control Panel” in the
Series 1500 Operation & Maintenance Manual.
NOTES:
1.
The heater control panel should
be within sight of the heater if
a disconnect switch option is
selected.
2.
Maintain a water level at least
2” over the heaters by ensuring
proper operation of make-up
water level control. Low water
may lead to over temperature
conditions near the heater.
3.
All power wiring should have
a temperature rating of 167°F
(75°C), and be rated for the
number of wires in the conduit.
4.
The wiring should be sized
for the quantity of incoming
wires in the conduit and the
amperage of the branch circuit
protective device as directed by
the NEC/CEC, or any other local
directives.
5.
If non-metallic conduit is used,
provide a circuit grounding
conductor that meets NEC/CEC
requirements. Ground lugs are
provided in the heater control
panel.
