SPX Cooling Technologies 92-1322C - Manual (Page 6)

6
/ Installation /
Control Panel
The control panel is suitable for outdoor mounting, and may be mounted
on the tower, but not inside the tower. Wire the heaters to the panel. Wire
the panel to the branch circuit supplying power to the heater.
The field supplied branch circuit disconnect switch and the branch circuit
protective device (fusing or circuit breaker) shall be sized in accordance
with the NEC/CEC rules for actual load. The total heater load can be
calculated as shown below.
If the heater control panel is furnished with an optional disconnect, in-
stallation of the panel in relationship to the heater element shall be in
accordance with the NEC/CEC rules.
The main incoming conduit hub and the main power termination points are
sized for 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 to determine the sum total KW of all the heaters connected to it or
use the nameplate rating to determine the wire size required. To calculate
amp draw for a particular installation use the following formulas:
Should water be drained, either intentionally or accidentally, from
the basin, the basin heater MUST be checked manually to insure the
power source to the heating element is OFF. Although equipped with
a low liquid level sensor probe, contaminants on or around the probe
may cause false readings allowing the element to remain energized
under low or no water conditions. Do not re-energize the unit until
the sensor probe is fully submerged in water.
IF THE UNIT IS ENERGIZED WHILE THE SENSOR PROBE IS NOT
FULLY SUBMERGED IN WATER, COMBUSTION/FIRE MAY RESULT,
WHICH COULD DAMAGE OR DESTROY THE TOWER AND MAY CAUSE
DAMAGE TO PERSONS OR PROPERTY NEARBY.
KW x 1000
Voltage
= Amperage for Single Phase Applications
KW x 1000
1.7312 x Voltage
= Amperage for Three Phase Applications
or
Caution