Service Handbook

Condensing Models: On-Demand Water Heater Service Handbook • 19
TROUBLESHOOTING
DIP SWITCH SETTINGS
Use this section to verify DIP switch settings.
Each DIP switch has a specific function as shown in the following tables. Generally, they
should not require adjustment.
Verify the function of each DIP switch carefully before changing any settings.
If you have questions, contact the technical service department.
Table 5: DIP Switch Settings
Position switches as indicated by the black squares.
NO. FUNCTIONS ON POSITION
1 Gas type Propane Disable
2 Natural gas Disable
3
4
5
FM+, FM- and Input-
(Fan motor speed is increased automaƟcally.
6
7
InstallaƟŽŶ seƫŶŐƐ
8 N/A N/A N/A (Default)
9 Output temperature
seƫŶŐƐ
140 °F (60
°C) 120 °F (49 °C)
(Default)
10* ĞĂĐƟvaƟŽŶ of the exhaust temperature control Enable Disable
(Default)
Temperature set
120 °F (49 °C)
DEFAULT
140 °F (60 °C)
OFF
ON
123456789 10
OFF
ON
123456789 10
DEFAULT
No.3: OFF
No. 4: OFF
No.5: OFF
OFF
ON
12345678910
Propane
OFF
ON
123456789 10
Natural
Gas
OFF
ON
123456789 10
Outdoor model
No. 6 : OFF
No. 7 : ON
OFF
ON
1
2
3
4
5
6
789
10
Set DIP switches shown
in the table below.
VenƟŶŐ
2 inch 3 inch 4 inch
^ŝŶŐůĞƉŝƉĞ Two-pipe ^ŝŶŐůĞ pipe
Two-pipe &
ƐŝŶŐůĞ pipe
OFF
ON
123456789 10
5 to 6.5 Ō .
OFF
ON
123456789 10
5 to 20 Ō . (DEFAULT)
OFF
ON
123456789 10
5 to 45 Ō . (DEFAULT) 5 to 50 Ō . (DEFAULT)
OFF
ON
123456789 10
OFF
ON
1
2
3
4
5
6
78
9
10
21 to 40 Ō.
OFF
ON
123456789 10
41 to 70 Ō.
OFF
ON
1
2
3
4
5
6
78
9
10
46 to 70 Ō.
OFF
ON
1
2
3
4
5
6
78
9
10
51 to 100 Ō.
N/A
N/A
N/A
N/A
Set DIP switches shown in the table below depending on the vent length.
OFF POSITION
DANGER!ŽŶŽƚĂĚũƵƐƚ/WƐǁŝƚĐŚEŽϭϬǁŝƚŚŽƵƚŐƵŝĚĂŶĐĞĨƌŽŵƚŚĞƚĞĐŚŶŝĐĂůƐĞƌǀŝĐĞĚĞƉĂƌƚŵĞŶƚdŚĞŽŶůLJƟŵĞ
DIP switch 10 should be set to ON is when your unit is being hooked up to CAT III/IV metal vent with a maximum temp.
ƌĂƟŶ
Ő
ŽĨϰϴϬΣ&dŚĞEŽϭϬ/WƐǁŝƚĐŚĚĞĂĐƟǀĂƚĞƐƚŚĞĞdžŚĂƵƐƚƚĞŵ
Ɖ
ĞƌĂƚƵƌĞĐŽŶƚƌŽůǁŚĞŶƐĞƚƚŽƚŚĞKE
Ɖ
ŽƐŝƟŽŶ
*
For correct settings, see Table 6, p. 20 and Table 7, p. 21.)
Bank of DIP Switches
Figure 9.