International comfort products G9MVE A3 Series Installation Instructions Manual page 16

INSTALLATION INSTRUCTIONS
Condensate Drain Connection
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 drain trap
heaters, electric heat tape and/or RV antifreeze is recommen-
ded for these installations.
CAUTION
!
PROPERY 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.
DO NOT trap 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 32º F (0º 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 32º F (0º C), a Condensate Freeze Protection kit
is required. The kit includes a condensate trap with heat pad
and replaces the factory installed condensate trap. Refer to the
Accessory section of the Specification Sheets 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 edition of the National Standard Plumbing Code
2009, in the US or the National Plumbing Code of Canada
2010 in Canada.
Upflow/Downflow Orientation
In the Upflow or Downflow orientation, the condensate trap is
inside the furnace casing. The condensate drain must be
routed from the trap through the furnace casing. The
condensate drain can be routed through the left or right side of
the casing. (The left or right side is as you are viewing/facing
the furnace from the front.)
An indoor coil condensate drain or humidifier drain can be
connected to the external furnace condensate drain provided:
a. The drains are not hard piped together, and
b. There is an air gap at the point where the two drain
lines meet or
16
c. All condensate piping is at least 1/2 in. PVC and
NOTE: On narrower casings, it may be easier to remove the
condensate trap, connect the drain line components and
re-install the condensate trap. Read the steps thoroughly to
familiarize yourself with the required steps.
For Right Side Condensate Drain:
1. Remove the 7/8−in. knock−out from the right side of the
casing. (See Figure 12 for suggested knockout removal
technique.)
2. Remove the pre−formed rubber drain elbow and two
spring clamps from the loose parts bag.
3. Slide a spring clamp 1−in. (25 mm) down the plain end
(the end without the formed grommet) of the drain elbow.
4. From inside the casing, insert the formed grommet end
of the elbow through the 7/8−in. knockout in the casing.
5. Pull the grommet through the casing from the outside
until it is seated in the knockout
6. Attach the plain end of the drain elbow to the outlet stub
on the drain trap. Secure the drain elbow to the trap with
the spring clamp.
The remaining drain line can be constructed from field supplied
1/2−in. CPVC or 3/4−in. PVC pipe in compliance with local
building codes. A factory−supplied 1/2−in. CPVC to 3/4−in PVC
adapter is supplied in the loose parts bag for use as required.
7. Install the adapter or connect the 1/2−in. CPVC pipe by
sliding a spring clamp over the open end of the grommet
on the outside of the furnace casing.
8. Open the spring clamp and insert the long end of the
adapter of the 1/2−in. CPVC pipe into the outlet stub on
the drain elbow.
9. Connect
code−approved drain, or to a condensate pump
approved for use with acidic furnace condensate and
compatible with mineral and vegetable oils, such as
canola oil.
Allow at least 1/4−in. per foot (20 mm per meter) of slope down
and away from the furnace in horizontal sections of drain line.
TIPS FROM CONTRACTORS: Contractors have found that
temporarily removing
applications while performing the steps below, makes upflow
left−side drain connections easier.
Figure 12
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate protective clothing, safety glasses and
gloves when handling parts, and servicing furnaces.
Specifications subject to change without notice.
Gas Furnace: (F/G)9MVE
there is a relief tee at the top of condensate drain
piping as shown below:
additional condensate
the inducer
Knockout Removal
CAUTION
!
piping to a
assembly in upflow
L12F019
440 01 4401 02