ICP G9MAC Series, Installation Instructions Manual

16

440 01 4201 03

Specifications subject to change without notice.

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 tube.

9. Connect additional condensate piping to a

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.

Figure 12

Example of Field Drain Attachment

A11276

OPEN STAND

PIPE FOR

A/C OR

HUMIDIFIER

DRAIN

TEE

TO OPEN

DRAIN

TIPS FROM CONTRACTORS: 

Contractors have found that

temporarily removing the inducer assembly in upflow

applications while performing the steps below, makes upflow

left

−

side drain connections easier.

For Left Side Condensate Drain Connection:

1. For left side condensate drainage, the drain line is routed

from the condensate trap, behind the inducer (upflow) or

gas valve (downflow) and out through the left side of the

furnace casing. A pre-formed 1/2

−

in. CPVC “Z” pipe is

provided with the furnace. The “Z“ pipe is long enough to

extend across the casing for drain connections.

2. Locate the “Z” pipe. Remove the pre-formed drain tube

and four spring clamps from the loose parts bag.

3. The “Z” pipe is connected to the condensate trap and the

outside of the furnace by modifying the formed rubber
drain tube as shown in  

Figure 14

.

4. Remove the formed grommet from the rubber drain tube

by cutting the elbow along the vertical line located about

1 3/8

−

in. (35 mm) away from the formed grommet. See

Figure 13

. DO NOT DISCARD THE FORMED

GROMMET OR THE RUBBER ELBOW. Both of these

pieces will be used.

Assemble and route the drain line to the opposite side of the

furnace as detailed below:

5. Remove the knock

−

out from the left side of the casing.

(See 

Figure 13

 for suggested knockout removal

technique.)

6. From the outside of the casing, insert the angled end of

the ”Z” pipe through drain hole in the left side of the

casing and behind the inducer or gas valve. Allow the ”Z”

pipe to temporarily rest on the blower shelf (upflow) or

burner box (downflow). (

NOTE:

 When the inducer

housing has been removed to ease installation in upflow

applications, this step is not needed.)

7. After inserting the “Z” pipe through the casing, slide a

spring clamp over each end of the “Z” pipe.

8. From inside the casing, insert the short end of the formed

grommet cut from the rubber drain tube through the

7/8

−

in. drain knockout in the casing.

9. Pull the grommet through the casing from the outside

until it is seated in the knockout.

10. Align the ”Z” pipe with the long end of the grommet inside

the furnace and insert slightly. The angled end of the

tube at the other side of the casing should be facing the

front of the furnace.

11. Slide a spring clamp over the end of the remaining

rubber drain tube.

12. Attach the drain tube to the angled end of ”Z” pipe and

the drain trap outlet stub. Adjust the length of ”Z” pipe

inserted into the grommet at the opposite side of the

furnace as necessary for proper fit and positioning. In

both upflow and downflow orientations, the ”Z” pipe

should NOT be resting on any sheet metal parts.

13. Secure the rubber elbow to the drain trap and the ”Z”

pipe with spring clamps.

14. Secure the grommet to the ”Z” pipe 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.

15. 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 the furnace casing.

16. Open the spring clamp and insert the long end of the

adapter or the 1/2

−

in. CPVC pipe into the outlet stub on

the drain tube.

17. Connect additional condensate piping to a

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.

NOTICE

The field-supplied, accessory horizontal drain trap grommet

is ONLY REQUIRED FOR DIRECT VENT APPLICATIONS. It

is NOT required for applications using single-pipe or ventil-

ated combustion air venting.

TIPS FROM CONTRACTORS: 

When installing the furnace

horizontally, use the entire drain elbow (that is, do NOT cut as

shown in 

Figure 14

) to connect the trap to the drain line. This

helps to prevent bumps and shocks to the drain line from

damaging the furnace drain trap. Avoid misalignment of the

drain pipe which may cause kinks in the elbow.

Horizontal Orientation

1. The condensate trap outlet extends 2

−

in. (51 mm) below

the furnace casing. Leave enough clearance between

the furnace and the furnace platform for the trap.

2. To allow for servicing the trap, the condensate drain

elbow in the loose parts bag can be used to make a

coupler to allow for future service of the condensate trap

and drain line.