59CU5A: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
11
L12F012
Fig. 8 – Air for Combustion, Ventilation, and Dilution for Outdoors
L12F013
Fig. 9 – Air for Combustion, Ventilation, and Dilution from Indoors
CONDENSATE TRAP
The condensate trap is a field installed trap. A bag of loose parts needed
to install the trap is provided with the furnace. How to install the trap is
shown in the Installation section of this manual. Only use the trap
provided with the furnace.
Condensate Drain Connection
DO NOT trap condensate water in the drain line in any other location
than at the condensate drain trap supplied with the furnace. If possible,
DO NOT route the drain line where it may freeze. The drain line must
terminate at an inside drain to prevent freezing of the condensate and
possible property damage.
Special precautions MUST be made if installing furnace in an area
which may drop below 32° F (0° C). This can cause improper operation
or damage to the equipment. If the furnace environment has the potential
of freezing, the drain trap and drain line must be protected. In areas
where the temperature may be below 32° F (0° C), a Condensate Freeze
Protection heat tape kit is strongly recommended. Refer to the Accessory
section of the Product DataSpecification for current kit number. A
self-regulating, shielded and waterproof heat tape rated at 3 to 6 watt per
foot (10 to 20 watt per meter) at 115 volt, 40°F (4°C) may be used to
provide freeze protection of the remaining condensate drain line. Wrap
the drain trap and drain line with the heat tape and secure with
appropriate plastic ties. Follow the heat tape manufacturer’s
recommendations. Prime the trap before furnace operation.
The condensate drain line must be supported and/or secured per local
codes. Supports and clamps should be spaced to prevent the drain line
from sagging or being dislocated from the furnace or termination point.
In the absence of local codes, consult the current edition of the National
Standard Plumbing Code, in the U.S.
An indoor coil condensate drain or humidifier drain can be connected to
the external furnace condensate drain provided:
• The drains are not hard piped together, and
WARNING
!
CARBON MONOXIDE POISONING AND PROPERTY
DAMAGE HAZARD
Failure to follow this warning could result in property damage, personal
injury or death.
The condensate trap provided with furnace must be installed per the
furnace installation instructions. Do not modify the trap or substitute a
different trap.
*Minimum dimensions of 3‐in. (76mm)
NOTE
: Use any of the following combinations of openings:
A & B, C & D, D & E, F & G
* Minimum opening size is 100 sq in. (64516 sq. mm) with
minimum dimensions of 3‐in. (76mm)
{
Minimum of 3‐in. (76mm) when type‐B1 vent is used.
NOTICE
!
The condensate trap extends below the underside of the casing in the
horizontal position. A minimum of 6⅜-in. of physical clearance is
required and 1-in. of additional clearance is recommended between the
casing side and the furnace platform for the trap to extend out of the
casing in the horizontal position. Allow at least 1/4-in. per foot of slope
down.
CAUTION
!
FROZEN AND BURST WATER PIPE HAZARD
Failure to protect against the risk of freezing may result in property
damage.
Special precautions MUST be made if installing furnace in an area
which may drop below freezing. This can cause improper operation or
damage to equipment. If furnace environment has the potential of
freezing, the drain trap and drain line must be protected. The use of
accessory electric heat tape and/or RV antifreeze is required for these
installations.
CAUTION
!
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in burst water pipes and/or
property damage.
If a condensate pump is installed, a plugged condensate drain or a failed
pump may cause the furnace to shut down. Do not leave the home
unattended during freezing weather without turning off water supply
and draining water pipes or otherwise protecting against the risk of
frozen pipes.
