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20
Vertical
12" (30cm)
Intake
2" (50mm)
or
3" (75mm)
Exhaust
2" (50mm)
or
3" (75mm)
Plastic Rain Cap*
(PRC-1)
*Not supplied with water
heater, order separately.
Increaser coupling**
**Not supplied with water heater,
order separately.
PVC-2CT
or
PVC-3CT***
*** 3" (75mm) pipe and 2"×3"Increaser couplings
require when using PVC-3CT.
Increaser couplings need to be used just prior
to PVC-3CT.
2" pipe
3" pipe
3" pipe
2"×3"Increaser
coupling
e.g.) PVC-2CT installation
<
Maximum Vent length when using PVC-2CT or PVC-3CT
>
Number of
pieces**
Number of
pieces**
Short length using 3" (75mm)
pipe
Short length using 2" (50mm)
pipe
Long length using 2" (50mm)
pipe
Long length using 3" (75mm)
pipe
** Table assumes straight vent pieces are 3’ (0.9m) each.
Shorter or longer vent pieces may also be used up to
the maximum allowed vent length.
** Table assumes straight vent pieces are 3’ (0.9m) each.
Shorter or longer vent pieces may also be used up to
the maximum allowed vent length.
Vent length condition
࠙
Dip Switch Adjustment
ࠚ
Dip switches
1
#7
#8
ON=
OFF=
2
3
4
2” Pipe
3” Pipe
* Not including the termination.
* Not including the termination.
3
0.9
1
6
1.8
2
9
2.7
3
12
3.6
4
15
4.5
5
18
5.4
6
21
6.3
7
24
7.2
8
27
8.1
9
30
9.0
10
33
9.9
11
36
10.8
12
39
11.7
13
42 12.6
14
45 13.5
15
48 14.4
16
51 15.3
17
54 16.2
18
57 17.1
19
60 18.0
20
6
Vent length*
Elbows
ft
m
0
4
5
1
2
3
3
0.9
1
6
1.8
2
9
2.7
3
12
3.6
4
15
4.5
5
18
5.4
6
21
6.3
7
24
7.2
8
27
8.1
9
30
9.0
10
33
9.9
11
36 10.8
12
39 11.7
13
42 12.6
14
45 13.5
15
48 14.4
16
51 15.3
17
54 16.2
18
57 17.1
19
60 18.0
20
63 18.9
21
66 19.8
22
69 20.7
23
72 21.6
24
75 22.5
25
78 23.4
26
81 24.3
27
84 25.2
28
87 26.1
29
90 27.0
30
93 27.9
31
96 28.8
32
99 29.7
33
100 30.0
34
Vent length*
Elbows
ft
m
0
5
6
7
8
1
2
3
4
1
2
1
3
4
3" (75mm) pipe and 2"×3" increaser
coupling requires when using PRC-1.
PRC-1
3" (75mm) pipe
2" (50mm) pipe
2"×3" increaser coupling