Unitary products group WHOLE HOUSE DEHUMIDIFIER Spezifikationen PDF herunterladen (Seite 15)

035-17477-002 Rev. D (1202)

Unitary Products Group 15

The intake/vent should be located either through the wall

(horizontal or side vent) or through the roof (vertical vent).

Care should be taken to locate side vented systems where

trees or shrubs will not block or restrict supply air from enter-

ing or combustion products from leaving the terminal.

Also, the terminal assembly should be located as far as pos-

sible from a swimming pool or a location where swimming

pool chemicals might be stored. Be sure the terminal assem-

bly follows the outdoor clearances listed in Table 3 for U.S.

installations. In Canada, refer to CAN/CGA-B149.1 or.2

Installation Code (latest edition-Venting Systems and Air

Supply).

COMBUSTION AI R/ VENT PI PE SI ZI NG

To select the propeTable 4 or Table 5. The size will be deter-

mined by a combination of furnace model, total length of run,

and the number of elbows required. The following rules must

also be observed.Long radius elbows are required for all

units.

1. Long radius elbows are required for all units.

2. Elbows are assumed to be 90 degrees. Two 45 degree

elbows count as one 90 degree elbow.

3. Elbow count refers to combustion air piping and vent pip-

ing separately. For example, if the table allows for 5

elbows, this will allow a maximum of 5 elbows in the

combustion air piping and a maximum of 5 elbows in the

vent piping.

4. Three vent terminal elbows (two for vent pipe and one for

air intake pipe) are already accounted for and should not

be counted in the allowable total indicated in the table

(see vent termination section). These parts are shown

shaded.

For downflow/horizontal models, the two additional

elbows required for the air intake pipe entry into the

burner box are also accounted for and should not be

counted. These parts are shown shaded.

For downflow/horizontal models only two additional

elbows are also accounted for and also should not be

counted. These parts are shown shaded.

5. Combustion air and vent piping must be of the same

diameter.

6. All combustion air/vent pipe and fittings must conform to

American National Standards Institute (ANSI) standards

and American Society for Testing and Materials (ASTM)

standards D1785 (Schedule 40 PVC), D2665 (PVC-

DWV), F891 (PVC-DWV Cellular Core). D2241 (SDR-21

and SDR-26 PVC), D2261 (ABS-DWV), or F628 (Sched-

ule 40 ABS. Pipe cement and primer must conform to

ASTM Standards D2564 (PVC) or D2235 (ABS).

7. The use of flexible connectors or no hub connectors in

the vent system is not allowed. This type connection is

allowed in the combustion air pipe near the furnace for

air conditioning coil accessibility.

FIGURE 17 : Air Intake and Vent Locations -

Downflow/Horizontal

OPTIONAL

LEFT SIDE

COMBUSTION

AIR PIPE

ROUTING

COMBUSTION

AIR PIPE

CONNECTS TO

COLLAR ON

BOTTOM OF

BURNER BOX

VENT PIPE PASSES

THROUGH TOP PANEL

Table 4:

INTAKE/VENT PIPING - 2 PIPE SYSTEM

Models P*UR/

FG9-UP/G9T-UP

Pipe

Size

Max. Elbows vs. One Way Vent

Len gt h ( Ft.)

E lbow co un t do es not includ e t he elbows required for

th e ter min ation. S ee Step 4 un der Com b ustion Air/Ven t

Pipe Sizing

5 - 40 45 50 75

40 / 37 / 1000 / A

2” 6 5 4 N/A

60 / 55 / 1000 / B

80 / 75 / 1200 / B

80 / 75 / 1600 / C

100 / 95 / 1400 / C

100 / 95 / 2000 / C

40 / 37 / 1000 / A

3”8765

60 / 55 / 1000 / B

80 / 75 / 1200 / B

80 / 75 / 1600 / C

100 / 95 / 1400 / C

100 / 95 / 2000 / C

120 / 112 / 2000 / D

3" Only 6 5 4 N/A

140 / 130 / 2 000 / D

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 63 64

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