935CA: 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
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
• There is an air gap at the point where the two drain lines meet or
• All condensate piping is at least 3/4” PVC and there is a relief tee at
the top of condensate drain piping as shown , see
Fig. 11
.
A200069
A200070
A200071
Fig. 10 – Example of Field Drain Attachment (Not Allowed)
A200072
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.
