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15 Setting the DIP Switches
The location of DIP switch bank
The DIP switch bank is placed on the circuit board.
How to change the DIP switches
1. Disconnect the electrical power to the Combi
Boiler before changing the DIP switches.*
2. Open the front cover of the Combi Boiler (4
screws).
3. Adjust the DIP switches.
4. Close the front cover of the Combi Boiler (4
screws).
5. Reconnect the electrical power to the Combi
Boiler.
* Failure to perform this step will result a "73" code
displayed on the Operation Display and a cease in
operation.
If this occurs, disconnect, then reconnect the
electrical power to the Combi Boiler to reset the
system.
DIP Switch Listing
[For using 2 in. SV Conversion Kit]
Turn ON DIP switch #3.
[For installing at an altitude of 2,000 ft (610 m) or
higher]
Change DIP switch #5 and #6 by following the table
below.
High elevation adjustment
0-2,000 ft (0-610 m)
2,001-4,000 ft (611-1,219 m)
4,001-7,000 ft (1,220-2,134 m)
7,001-10,000 ft (2,135-3,048 m)
68
Setting the DIP Switches
OFF
ON
1 2 3 4 5 6 7 8
●
ON =
/ OFF =
DIP switches
#5
○
●
○
●
[For adjusting to accommodate longer vent runs]
• When using PVC/CPVC/PP material
Change DIP switch #7 and #8 by following the table
below.
Vent length condition
Less than 33 ft using 2 in. (50 mm) pipe
①
②
33 ft or more using 2 in. (50 mm) pipe
Less than 50 ft using 3 in. (75 mm) pipe
③
50 ft or more using 3 in. (75 mm) pipe
④
Refer to page 22 for more details on
• When using flexible pipe for chimney
Change DIP switch #7 by following the table below.
(DuraVent® - Flex Through Chimney w/ Air Intake
(Only 3 in.))
Vent
length
switch
condition
Short
length
Long
length
* The maximum vent length includes elbows.
(Centrotherm® - Flex Through Chimney w/ Air Intake
(Only 3 in.))
Vent
length
switch
condition
Short
length
Long
length
* The maximum vent length includes elbows.
○
#6
○
○
●
●
①
Maximum equivalent
DIP
vent length*
V (Vertical)
#7
+
H (Horizontal)
○
< 50 ft (15 m)
●
50 ft (15 m)–75 ft (22.5 m)
DIP
Maximum equivalent
vent length*
#7
Exhaust vent
V (Vertical) + H (Horizontal):
○
< 50 ft (15 m)
Air Intake:
< 50 ft (15 m)
Exhaust vent
V (Vertical) + H (Horizontal):
●
50 ft (15 m)–75 ft (22.5 m)
Air Intake:
< 75 ft (22.5 m)
●
○
ON =
/ OFF =
DIP switches
#7
#8
○
○
●
○
○
●
●
●
to
.
④
●
○
ON =
/ OFF =
Equivalent
length
Flexible pipe:
1 ft (0.3 m)
Rigid pipe:
1 ft (0.3 m)
90° elbow:
5 ft (1.5 m)
45° elbow:
3 ft (0.9 m)
●
○
ON =
/ OFF =
Equivalent
length
Flexible pipe:
1 ft (0.3 m)
Rigid pipe:
1 ft (0.3 m)
90° elbow:
5 ft (1.5 m)
45° elbow:
3 ft (0.9 m)
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