Bosch Appliances GWH 2400 ES NG manual Fan speed adjustment, Total vent length calculation, Intake

Maintenance and service

6.7Fan speed adjustment

Installation adjustment: Flue pipe length setting for minimum power - P2.

After installing the GWH 2400 ES, the minimum power fan speed must be selected to compensate for variation in vent pipe length.

Total vent length calculation

BDetermine the total length of all straight sections of vent pipe and enter in table 17, line 1.

BCount the number of 90° elbows used and enter that value in line 2. (Do not count end terminal and first elbow after the appliance).

BCount the number of 45° elbows used and enter that value in line 3.

BRepeat steps 1 through 3 for air intake pipe and enter those values in the intake section of table 17.

BAdd line 4 from Exhaust to line 4 of Intake and enter result in line 5.

This is the total equivalent vent length.

Exhaust

1	Straight section length	__ x 1 =		____
2	90° elbows (qty)	__ x 2.5 =		____
3	45° elbows (qty)	__ x 1.25 =		____
4		Total:		____
Intake
1	Straight section length	__ x 1	=	____
2	90° elbows (qty)	__ x 2.5	=	____
3	45° elbows (qty)	__ x 1.25	=	____
4		Total:		____
5	Total equivalent vent length =			____

Table 17Determining vent length combination (see example in Table 18)

Example

Exhaust

•7 - 3' straight sections

•1 - 1' straight section

Total length 22'

• 2 - 90° elbow. Intake

• 5 - 3' straight sections

Total length 15'

• 2 - 90° elbows.

Example
Exhaust
Straight section length	22 x 1 =	22
(feet)
90° elbows (qty)	1 x 2.5 =	2.5
45° elbows (qty)	0 x 1.25 =	0
Total:		24.5
Intake
Straight section length	15 x 1 =	15
(feet)
90° elbows (qty)	1 x 2.5 =	2.5
45° elbows (qty)	0 x 1.25 =	0
Total:		17.5
Total equivalent vent length =		42

Table 18Determining vent length combination example Note: Do not count 1st elbow and terminators

Total maximum length not to exceed 52

ift.

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