Condensate Assembly - Lennox G71MPP SERIES Unit Information

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Installation instructions manual (72 pages)

User's information manual (6 pages)

Table Of Contents

Table of Contents

Enlarged version

1 − Determine which side condensate piping will exit the

unit. Remove plugs from the condensate collar at the

appropriate location on the side of the unit.

NOTE − The condensate trap is factory−shipped with

two rubber O−rings and two rubber clean−out caps

installed. Check to make sure that these items are in

place before installing the trap assembly.

2 − Install condensate trap onto the condensate collar.

Use provided HI/LO screws to secure two upper

flanges of the trap to the collar. Use provided sheet

metal screw to secure bottom trap flange to side of

unit. See figure 34.

NOTE − In upflow and downflow applications, con-

densate trap must be installed on the same side as

exhaust piping.

CAUTION

DO NOT use a power driver to tighten screws which

secure condensate trap to cabinet. Screws should

be hand−tightened using a screw driver to avoid the

possibility of damage to the trap assembly.

3 − The grey−colored condensate trap (101661−01) pro-

vided with the unit is manufactured using ABS materi-

al. This is the only trap that is to be used with this unit.

Use ABS to PVC transition solvent cement to glue a

field−provided PVC coupling or PVC pipe to the trap.

Install a tee and vent pipe near the trap.

NOTE − The condensate trap drain stubs (both sides)

have an outer diameter which will accept a standard

3/4" PVC coupling. The inner diameter of each stub

will accept standard 1/2" diameter PVC pipe.

NOTE − Vinyl tubing may be used for condensate

drain. Tubing must be 1−1/4" OD X 1" ID and should be

attached to the drain stubs on the trap using a hose

clamp.

4 − Glue the field−provided drain line to the tee. Route the

drain line to an open drain. As an alternate, clear vinyl

tubing may be used to drain condensate away from

the trap. Secure the vinyl tubing to the drain stubs on

the trap using a hose clamp. Do not overtighten the

hose clamp.

Condensate line must be sloped downward away from

condensate trap to drain. If drain level is above con-

densate trap, condensate pump must be used. Con-

densate drain line should be routed within the condi-

tioned space to avoid freezing of condensate and

blockage of drain line. If this is not possible, a heat

cable kit may be used on the condensate trap and line.

Heating cable kit is available from Lennox in various

lengths; 6 ft. (1.8m) − kit no. 26K68; 24 ft. (7.3m) − kit

no. 26K69; and 50 ft. (15.2m) − kit no. 26K70.

Do not use copper tubing or existing copper

condensate lines for drain line.

5 − If unit will be started immediately upon completion of

installation, prime trap per procedure outlined in Unit

Start−Up section.

6 − Glue the provided cap onto the unused condensate

drain line stub.