Maximum Vent Length Table; Upflow/ Hprizontal Venting Table; Vent And Inlet Air Connections - Trane AUH1B040A9241A Installer's Manual

Upflow/horizontal, downflow/horizontal, gas-fired, direct vent condensing furnaces

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Installer's manual (40 pages)

Table Of Contents

Table of Contents

15 minutes before handling. Cure time varies according

to fit, temperature and humidity.

NOTE:

Follow venting instructions carefully when using PVC cement.

IMPORTANT:

All joints must be water tight. Flue condensate is somewhat

acidic, and leaks can cause equipment damage.

Connection of the pipe and collar of the combustion air

inlet should just be a friction fit. It is recommended that

the inlet air joint be sealed with RTV type sealant to allow

the joint to be separated for possible future service. The in-

let and vent pipes must be properly supported throughout

the entire length.

Connection of the vent pipe to the vent collar should also

be accomplished using RTV type sealant. This type sealant

provides a connection which remains flexible and can be

separated in the future if service needs require the removal

of the vent pipe for service or clearance. See Figure 24.

NOTE:

To ensure proper operation at the vent lengths indicated,

the combustion air inlet and vent terminals should be in

the same pressure zone. Terminating the vent and inlet in

different pressure zones will change the maximum vent

lengths and may cause nuisance tripping of the pressure

switch(es). The amount of change can not be predicted.

The selection of the inlet and outlet terminal locations are

the responsibility of the designer/installer. If the installer

chooses separate pressure zones for the terminals, the

combustion air inlet termination must be in the higher

(more positive) pressure zone.

MAXIMUM VENT LENGHT TABLE

MAXIMUM VENT LENGTH:

2" PIPE

& FITTINGS

MODEL

*UH1B040A9241A

*UH1B060A9361A

*UH1B080A9421B

*UH1C080A9601A

NOT ALLOWED

*UH1C100A9481A

NOT ALLOWED

*UH1D100A9601A

NOT ALLOWED

*UH1D120A9601A

NOT ALLOWED

NOTES: * - First letter may be "A" or "T"

1. FOR DURAVENT MANUFACTURED MODULAR VENTING SYSTEMS THAT ARE APPROVED IN TABLE 10, EQUIVALENT VENT LENGTHS MAY BE DIF-

FERENT FROM WHAT IS SHOWN ABOVE. REFER TO THE VENTING SYSTEM MANUFACTURER'S INSTALLATION INSTRUCTIONS FOR APPROPRIATE

VENTING DIAMETERS AND EQUIVALENT LENGTHS.

2. Minimum vent length for all models: 3' horizontal or 3' vertical.

3. DO NOT MIX PIPE DIAMETERS IN THE SAME LENGTH OF PIPE OUTSIDE THE FURNACE CABINET (Except adapters at the top of the furnace). If different

inlet and vent pipe sizes are used, the vent pipe must adhere to the maximum length limit shown in the table above (See note 6 below for exception). The inlet pipe

can be of a larger diameter, but never smaller than the vent pipe.

4. MAXIMUM PIPE LENGTHS MUST NOT BE EXCEEDED! THE LENGTH SHOWN IS NOT A COMBINED TOTAL, IT IS THE MAXIMUM LENGTH OF EACH (Vent

or Inlet air pipes).

5. One SHORT radius 90° elbow is equivalent to 10' of 4" pipe, 10' of 3" pipe, or 8' of 2" pipe. One LONG radius elbow is equivalent to 6' of 4" pipe, 7' of 3" pipe, 6'

of 2.5" pipe, or 5' of 2" pipe. Two 45° elbows equal one 90° LONG elbow.

6. The termination tee or bend must be included in the total number of elbows. If the BAYAIR30AVENTA termination kit is used, the equivalent length of pipe is 5

feet. BAYVENT200B equivalent length is 0 feet.

7. Pipe adapters are field supplied (except for the *UH/DH2D120 models).

8. For Canadian applications, venting systems must meet ULC-S636 requirements.

18-CD29D1-11

UPFLOW/ HORIZONTAL VENTING TABLE

DIRECT VENT (2 PIPE SYSTEM) -

MAXIMUM TOTAL EQUIVALENT FEET FOR

VENT AND INLET AIR PIPES (See Notes)

2-1/2" PIPE

3" PIPE

& FITTINGS

100