7
300 - 600 kW Unit (15 hp optional)
Electrical Wiring
ELECTRIC SHOCK HAZARD. Any installation
involving electric heaters must be performed
by a qualified person and must be effective-
ly grounded in accordance with the National
Electrical Code to eliminate shock hazard.
1. Electric wiring to heater must be installed in ac-
cordance with the National Electrical Code, Inter-
national Electrical Code and/or with local codes by
a qualified person.
2. Electrical wiring to heater should be contained in
rigid conduit or sealed in flexible conduit to keep
corrosive vapors and liquids out. If high humidity is
encountered, the conduit should slope away from
the heater.
3. If flexible cord is employed, a watertight connector
should be used for entry of the cord. Outdoor appli-
cations require liquid-tight conduit and connectors.
4. The current carrying capacity of the power supply
leads should exceed the heater amperage by at
least 25%. Be sure to consider the ambient operat-
ing temperature and apply the appropriate correc-
tion factor to the ampacity rating of the wire.
5. The unit is completely wired. The only wiring nec-
essary is to terminals L1, L2, and L3 in the control
panel and the ground lug in the control panel.
ELECTRIC SHOCK HAZARD. Disconnect all
power before installing or servicing heater.
Failure to do so could result in personal injury
or property damage. Heater must be installed
or serviced by a qualified person in accordance
with the National Electrical Code, NFPA 70.
6. Jog the motor by pushing the push button marked
START, located on the front of the panel. This test
is to check pump rotation and the unit should be
turned off immediately upon learning the direction
of rotation.
7. The pump rotation should be as indicated by ar-
rows on motor. If direction of rotation is wrong, re-
verse the input leads (L1 and L3) at the master cir-
cuit breaker. Momentarily start the pump to check
rotation.
8. Turn off power before checking electrical connec-
tions. All electrical connections should be checked
and tightened if necessary. They may loosen dur-
ing transit.
A minimum 257˚F (125˚C) insulated wiring
should be used.
Note: The control panel wiring diagram is typically in-
cluded inside the control panel enclosure. If missing, a
copy can be obtained by contacting your local Chro-
malox representative.