TP-M11
14
Locate outlets at least 6 inches from
outside walls or window coverings.
Return Ductwork
Return air plenum should be the same
cross sectional area as the air handler
return air opening. In vertical
installations, a conventional return air
drop and elbow is acceptable. IT is
recommended that the return duct /drop
be acoustically lined for 6 feet nearest
the air handler.
Risk of Freezing
Steps must be taken to prevent the hot
water coil from freezing. Coils that have
failed due to freezing and damage
caused by frozen coils are not covered
under warranty.
HRV and Fresh air connections
Fresh air and HRV connections to
ductwork can pose a risk of dumping cold
air into ductwork during periods of stand-
by or continuous run. Calculate mixed
air stream temperatures and provide
interlock controls to prevent freezing
conditions.
Evaporator coils
Evaporator cooling coils that are
mounted above the hot water coil pose a
risk to the hot water coil in the event that
the compressor contactor on the
condenser sticks in the on position.
When the call for cooling is satisfied, the
blower will stop running and allow cold
air from the evaporator coil to fall on to
the hot water coil.
Attic and crawl spaces
Air handlers may be located in areas
subject to freezing conditions. It is
necessary to protect the hot water coil
from freezing.
ELECTRICAL
Warning!
- Make sure unit is properly
grounded. Locate air handler on a
separate electric circuit, or use the same
circuit as the water heater or boiler.
Air handler wiring diagrams are located
on the blower for easy reference during
installation and servicing.
Nameplate data is located on the side of
the unit.
All air handlers operate on
115VAC/1ph/60hz line voltage. All
control circuits are 24 VAC. One leg of
the 24 VAC is grounded to the chassis.
Thermostat
The
thermal-pac™
and
thermal-duct™
air handlers are compatible with most
standard heat/cool, heat pump, “electric
heat”, “gas heat”, set-back or electronic
thermostat. Some electronic
thermostats (primarily “power robbing”
types) require the addition of a resistor
between the W & C terminals
and the Y & C terminals. This is usually
covered in the thermostat instruction
manual. A 1,000 ohm, 5 watt resistor on
each of the W and Y terminals will
usually be enough to drain the current
required to power the thermostat. Some
