25
Page
To determine the dimension of a
system
Determine the vent diameter (D) and the total vent length based on the number of water
height (H). See the table below.
•
Total vent length (L)="H"+"W" +
(Number of Elbows x 5)
•
Vent diameter="D"
WARNING
•
A Non-Return Valve must be installed for each water heater.
This prevents
the escape of combus
ƟŽŶ
gas through non-opera
ƟŶŐ
appliances.
• For detailed ins
ƚƌƵĐƟ
ons on the common-ven
ƟŶŐ
system, refer to the
ins
ƚƌƵĐƟŽŶƐ
that are packaged with the vent parts or web site.
*Diameters of pipes are in accordance with Centrotherm's
ƐƉĞĐŝĮ
ca
ƟŽŶƐ͘
**One elbow is equivalent to 5
Ō
(1.5 m) linear length, and the maximum number of elbows is 5.
NOTICE
• Regarding the clearances
between the exhaust
termina
ƟŽŶ
and the
to pp. 26
to 28.
• Insert bird screen in
elbow terminals.
Common-ven
ƟŶŐ
system
Vent
Diameter*
(D)
Max.
No. of
water
heaters
Max. V
ĞƌƟ
cal and
Horizontal
(Total) Vent Length** (L)
DIP switch se
ƫŶŐƐ
4 in.
(110 mm)
2
25
Ō
(7.6 m)
240 Indoor/340 Indoor
OFF
ON 1 2 3 4 5 6 7 8 9 10
No. 6 : ON / No. 7: OFF
540 Indoor
(Upper bank of
DIP switches)
OFF
ON 1 2 3 4 5 6 7 8
No. 3 : ON / No. 4: OFF
5 in.
(125 mm)
2
50
Ō
(15.2 m)
3
20
Ō
(6.1 m)
6 in.
(160 mm)
2
100
Ō
(30.5 m)
3
75
Ō
(22.9 m)
4
50
Ō
(15.2 m
5
25
Ō
(7.6 m)
6
20
Ō
(6.1 m)
8 in.
(200 mm)
3
100
Ō
(30.5 m)
4
100
Ō
(30.5 m)
5
85
Ō
(25.9 m)
6
65
Ō
(19.8 m)
7
50
Ō
(15.2 m)
8
41
Ō
(12.5 m)
10 in.
(250 mm)
5
100
Ō
(30.5 m)
6
100
Ō
(30.5 m)
7
100
Ō
(30.5 m)
8
100
Ō͘
(30.5 m)
"H"
Intake
Exhaust
"D"
Elbow terminal
Elbow terminal
"W"
Non-Return Valve
• Adjust the appro-
priate DIP switches
l
e
d
o
m
o
t
g
n
i
d
r
o
c
c
a
as shown in the
le
Ō
table. DO NOT
adjust the other DIP
switches.
(Refer to p. 19 for
the loca
ƟŽŶ
of the
DIP switches.)
• Turn
Žī
the power
supply to the water
heater before chang-
ing the DIP switch
se
ƫŶŐƐ͘
• Failure to observe
these warnings
could lead to carbon
monoxide poisoning
or death.
WARNING
Printed on 12/6/2017 8:34 AM CT
