Manual Buderus SSB512 (page 28 of 68) (English)

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6720818454 (2016/02) US SSB

28 | Installation

Wall Terminal Material Supplier Part Number

3" (80 mm) parallel stainless steel Flex-L 46546901

3” (125 mm)

4” (100mm)

Concentric kits

PVC or CPVC IPEX IIa

196006 (PVC), 197009 (CPVC)

196021 (PVC), 197021 (CPVC)

3” (125mm)

Wall termination kit

PVC IPEX IIa 081219

3” (125 mm)

4” (100mm)

Low prole termination kit

PVC IPEX IIa

196985

196986

3” (80 mm)

twin pipe termination

PVC/parallel stainless steel ANSI/ASTM D1785 or Field Controls 46600203

4” (100 mm)

twin pipe termination

PVC/parallel stainless steel ANSI/ASTM D1785 or Field Controls 46600204

3” (80 mm) twin pipe termination PP

M&G Duravent PolyPro or

Centrotherm InnoFlue

3PPS-HTP (M&G Duravent) or

ISLPT0303 (Centrotherm)

4” (100 mm) twin pipe termination PP M&G Duravent PolyPro 4PPS-HTP (M&G Duravent)

3” (80 mm) single pipe termination PP M&G Duravent PolyPro 3PPS-HST (M&G Duravent)

3” / 5” (80/125 mm) concentric

termination

M&G Duravent PolyPro or

Centrotherm InnoFlue

3PPS-HKL (M&G Duravent) or

ICWS3539 (Centrotherm)

4” / 6” (100/150 mm)

concentric termination

M&G Duravent PolyPro or

Centrotherm InnoFlue

4PPS-HK (M&G Duravent) or

ICWS4639 (Centrotherm)

Tab. 6 Wall terminals

4.7.4 Vent and combustion air pipe length [For single boiler

installations]

The maximum length for vent and combustion air pipes can be found in

the following table. Please note the length is for each vent / combustion

air pipe and not combined.

SSB255 SSB399 SSB512

3” (80 mm) 100 ft (30 m) 20 ft (6 m) 20 ft (6 m)

4” (110 mm) 165 ft (50 m) 100 ft (30 m) 100 ft (30 m)

5” (130 mm) 165 ft (50 m) 165 ft (50 m) 165 ft (50 m)

Tab. 7 Equivalent length for PVC and CPVC pipes

In the following tables are listed the equivalent length for PVC/CPVC

pipes and PP pipes:

3” (80 mm) 4” (100mm)

1 ft vent pipe 1 ft 1 ft

45° elbows 2.5 ft 4 ft

90° elbows 5 ft 7 ft

Tab. 8 Equivalent length for PVC and CPVC pipes

3”

(80 mm)

4”

(110 mm)

5”

(130 mm)

6”

(150 mm)

8”

(200 mm)

1 ft vent pipe 1 ft 1 ft 1 ft 1 ft 1 ft

1 ft ex pipe 2 ft 2 ft 2 ft N/A N/A

45° elbows 3 ft 5 ft 6 ft 6 ft 13 ft

90° elbows 7 ft 12 ft 14 ft 14 ft 19 ft

Tee 12 ft 19 ft 21ft 22 ft 29 ft

Tab. 9 Equivalent length for PP pipes

For the equivalent vent length of Stainless Steel AL29-4C venting

material and the roof and wall terminals please refer to the installation

manual of the vent system supplier.

To calculate the allowed length of a vent and combustion air system

follow this example:

When using a SSB255 with 3” (80 mm) PP system with 3 x 45° -elbows

and a 90° -elbow as termination, the total venting equivalent length for

each pipe [vent or combustion air] may not exceed 100 ft. ( 30 m).

3 × 45°-elbow = 3 x 3 ft. (0.91 m) = 9 ft. (2.7 m)

1 × 90°-elbow terminal = 7 ft. (2.1 m).

Total friction loss equivalent =16 ft. (4.8m)

Total venting length for this example is:

SSB255 = 100 ft. (30 m) - 16 ft. (4.8m) = 84 ft. (25.60 m) each for the

intake and exhaust piping.

When the total ue system equivalent length is veried it is necessary to

set the par N° 99 “Flue length range” according to the total length of the

installed ue system as dened in the following table:

Value

for par

System with Max.

eq. length of

20+20 ft

System with Max.

eq. length of

100+100 ft

System with Max.

eq. length of

165+165 ft

1 From 0 to 10 ft From 0 to 50 ft From 0 to 82 ft

2 From 11 to 20 ft From 51 to 100 ft From 83 to 165 ft

3 From 21 to 30 ft From 101 to 150 ft From 166 to 248 ft

4 From 31 to 40 ft From 151 to 200 ft From 249 to 330 ft

Tab. 10 Value for the par N° 99 depending on the sum of equivalent

length of vent and combustion air pipe

Dening the correct value to assign to par N° 99 follow this

example:

When using a SSB399 with 4” (110 mm) PP venting material the

maximum equivalent length is 100 feet for both vent and combustion

air piping. Consider the equivalent length of vent pipe is 56 ft. and the

combustion air pipe is 42 ft. First step is to verify that both the vent and

combustion air pipe is less than 100 ft:

56<100 : veried

42< 100 : veried

The sum of equivalent length of vent and combustion air pipe is:

56+42=98 ft. See Tab. 10 for dening parameter 99.

Row 2 - System with Max eq. length of 100 ft + 100 ft. The example

provided a total equivalent length of 98 ft. which falls in between 51 - 100

ft found on row 2. So par N° 99 = 2.

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