WWW.BALTIMOREAIRCOIL.COM
26
PT2
Operation Considerations for
Accessories
Basin Heater (Optional)
One or more electric immersion heaters prevent the cold water basin from completely
freezing over and damaging the unit during shutdown or standby. The heaters are sized
for the specific unit. The heating element has an enclosure that is suitable for outdoor
use. Annually, inspect the basin heater prior to the risk of reaching freezing operating
conditions.
NOTICE:
The basin heater is not
designed to prevent icing during
unit operation.
Figure 7.
Basin Heater
NOTICE:
The heater control panel
temperature/low level control can
only be used with the supplied
combination temperature/water
level sensor probe. Please contact
your local BAC Representative for
replacement parts.
Stand Alone BAC Heater Control Panel (Optional)
The heater control system consists of a heater control panel and a combination
temperature/water level sensor. The stainless steel sensor probe with 1/2” NPT mounting
fitting has an on/off relay output that de-energizes the heaters whenever the basin water
temperature is above 45°F (7.2°C), or whenever the sensor probe is not fully submersed.
The control panel enclosure is suitable for outdoor use.
The control system utilizes a combination temperature/low water level control sensor,
which is powered by a transformer in the control panel. When the sensor provides a signal
to the control panel, the panel sends a control voltage to the magnetic contactors. When
energized, the magnetic contactors supply line voltage to the heaters. Annually inspect the
heater control system prior to the risk of reaching freezing operating conditions.
Operation
Ensure that the heating element is completely
submerged before energizing the main
disconnect. De-energize, lock out and tag out
power to the basin heater prior to draining the
cold water basin. For installations that have
a BAC Controls Enclosure, please consult the
submittal packet provided with the unit and
contact your local BAC Representative for
support. For installations that use a stand alone
BAC heater control panel, see below.
6
