3. Slide assembled kit with rain shield REMOVED through hole.
NOTE:
Do not allow insulation or other materials to accumulate inside of pipe assembly when installing it through hole.
Roof terminations—Locate assembly through roof to appropriate height as shown in Fig. 40.
Sidewall terminations—Locate assembly through sidewall with rain shield positioned no more than 1-in. from wall as shown in Fig. 40.
4. Disassemble loose pipe fittings. Clean and cement using same procedures as used for system piping.
5. Check required dimensions as shown in Fig. 40.
TWO-PIPE TERMINATION KIT
Determine an appropriate location for termination kit using the guidelines provided in section
″
Vent Termination: General
″
in this instruction.
1. Cut 2 holes, 1 for each pipe, of appropriate size for pipe size being used.
2. Loosely install elbow in bracket and place assembly on combustion-air pipe.
Roof terminations—Loosely install pipe coupling on properly cut vent pipe. Coupling must be positioned so bracket will mount as shown
in Fig. 40.
For applications using combustion-air pipe option, indicated by dashed lines in Fig. 40, install 90° street elbow into 90° elbow, making a
U-fitting. A 180° U-fitting may be used.
Sidewall terminations—Install bracket as shown in Fig. 40.
For applications using vent pipe option indicated by dashed lines in Fig. 40, rotate vent elbow 90° from position shown in Fig. 40.
3. Disassemble loose pipe fittings. Clean and cement using same procedures as used for system piping.
4. Check required dimensions as shown in Fig. 40.
MULTIVENTING AND VENT TERMINATIONS
When 2 or more PG9MAB Furnaces are vented near each other, each furnace must be individually vented. NEVER common vent or breach vent
PG9MAB furnaces.
(Direct Vent/2-Pipe System ONLY)-When 2 or more PG9MAB furnaces are vented near each other, 2 vent terminations may be installed as shown
in Fig. 40, but next vent termination must be at least 36 in. away from first 2 terminations. It is important that vent terminations be made as shown
in Fig. 40 to avoid recirculation of flue gases.
PROCEDURE 8—CONDENSATE DRAIN
A.
General
Condensate trap is shipped installed in the blower shelf and factory connected for UPFLOW applications. Condensate trap must be RELOCATED
for use in DOWNFLOW and HORIZONTAL applications.
Condensate trap MUST be used for all applications.
An external trap is not required when connecting the field drain to this condensate trap.
The field drain connection (condensate trap or drain tube coupling) is sized for 1/2-in. CPVC, 1/2-in. PVC, or 5/8-in. ID tube connection.
Drain pipe and fittings must conform to ANSI standards and ASTM D1785, D2466 or D2846. CPVC or PVC cement must conform to ASTM
D2564 or F493. Primer must conform to ASTM F656. In Canada, use CSA or ULC listed schedule 40 CPVC or PVC drain pipe, fittings, and
cement.
When a condensate pump is required, select a pump which is approved for condensing furnace applications. To avoid condensate spillage, select
a pump with an overflow switch.
CAUTION: UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit operation.
Unit must not be installed, operated, and then turned off and left in an unconditioned structure during cold weather when temperature
drops to 32°F and below unless drain trap and drain line have adequate freeze protection. See Service and Maintenance Instructions
for winterizing procedures. (See Fig. 16.)
Furnace condensate is mildly acidic, typically in the pH range of 3.2 to 4.5. Due to corrosive nature of this condensate, a condensate pH neutralizing
filter may be desired. Check with local authorities to determine if a pH neutralizer is required.
B.
Application
The furnace, A/C, and humidifier drains may be combined and drained together. The A/C drain must have an external, field-supplied trap prior
to the furnace drain connection. All drain connections (furnace, A/C, or humidifier) must be terminated into an open or vented drain as close to
the respective equipment as possible to prevent siphoning of the equipment’s drain.
Table 12—Vent Termination Kit for Direct Vent/2-Pipe System
DIRECT VENT (2-PIPE) TERMINATION KIT
TERMINATION SYSTEM
DIAM. OF COMBUSTION AIR AND VENT
PIPES (IN INCHES)
2-in. Concentric Vent Kit
Single Penetration of Wall or Roof
1, 1-1/2, 2, or 2-1/2
3-in. Concentric Vent Kit
Single Penetration of Wall or Roof
2-1/2, 3 or 4
2-in. Termination Bracket Kit
2-Pipe Termination System
1, 1-1/2 or 2
3-in. Termination Bracket Kit
2-Pipe Termination System
2-1/2, 3 or 4
—47—
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