Johnson Controls Residential Gas TM9V MP - Manual (Page 17)

438335-UIM-B-0509
Johnson Controls Unitary Products 17
CONDENSATE DRAIN TERMINATION
A condensate sump pump MUST be used if required by local codes, or
if no indoor floor drain is available. The condensate sump pump must
be approved for use with acidic condensate.
CONDENSATE DRAIN TRAP AND DRAIN FREEZE
PROTECTION
Special precautions MUST be made if installing furnace in an area
which may drop below freezing. This can cause improper operation or
damage to the equipment. If the furnace is installed in an area that has
the potential of freezing, the drain line must be protected. Use a 3 to 6
Watt per foot at 115 vac, 40ºF (4.4°C) self-regulating, shielded and
waterproof heat tape. Wrap the drain line outside of the furnace with the
heat tape and secure with ties. Follow the heat tape manufacturer's rec-
ommendations.
FIGURE 23: Typical. Combustion Pipe Drain Tee.
Connect to Drain
Trap
Combustion Air Pipe
Tee with Drain Trap
Exhaust Pipe
DO NOT terminate condensate drain in a chimney, or where the
drain line may freeze. The line must terminate at an inside drain to
prevent freezing of the condensate and possible property damage.
DO NOT trap the drain line at any other location than at the conden-
sate drain trap supplied with the furnace.
Liquid anti-freeze will cause damage to internal plastic parts of this
furnace. DO NOT attempt to winterize the furnace using liquid
anti-freeze.