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3. The wiring diagrams contained in this manual are to be used for reference purposes only.
4. Refer to these diagrams and the wiring diagrams of any external controls used with the installation when wiring the water heater.
Read, understand, and follow all wiring instructions supplied with the controls.
5. Do not disconnect the power supply when the water heater is in normal operation.
NOTE: For additional electrical protection, the use of a whole house surge protector is recommended. Damage caused by power
surges is not covered by the warranty.
If the water heater display does not come ON, first check the plug. Also check the electrical panel circuit breaker and reset it if
necessary. If the circuit breaker trips again, do not reset. Disconnect the plug and have a qualified technician diagnose the problem.
B. DIP SWITCHES
There is one DIP switch. DIP switches 6 and 7 need to be set to OFF for the water heater to operate normally.
DIP SWITCH GROUP
DIP SWITCH
1 – 3
4
5
6
7
Table 16 – DIP Switch Group
SYSTEM CONTROL SETTINGS
MAXIMUM FLAME DETECTING VOLTAGE
PRE-PURGE TIME (Tp)
SAFETY TIME (IGNITING TIME) (Ts)
IGNITING INTERVAL TIME
POST-PURGE TIME (Tip)
OVER-HEATING 1,2,3 PROTECTION DETECTION TIME
TEMPERATURE SENSOR FAULT DETECTION TIME
# OF IGNITION ATTEMPTS (Ntl)
DHW SET TEMPERATURE RANGE
DHW OFF TEMPERATURE
DHW ON TEMPERATURE
DHW WATER ON MINIMUM WATER FLOW
DHW WATER OFF MINIMUM WATER FLOW
Table 17 – System Control Settings
NOTICE
Figure 20 – Dip Switch Detail
NOT USED
NOT USED
Gas Type
High Fire
Low Fire
DHW Target Temperature + DHW Differential Temperature
OFF
NOT USED
NOT USED
LP
Normal
Normal
2.5V
Maximum 10 seconds, minimum 1 second
3.5 seconds
<10 seconds
3 minutes
<1 seconds
<2 seconds
10
o
o
o
95
F (35
C) - 140
o
o
50
F (10
C)
Below DHW Target Temperature 41
.5 gallons (2 liters) (12Hz)
.4 gallons (1.5 liters) (8Hz)
ON
NG
High Fire
Low Fire
o
F (60
C)
o
o
F (5
C)
WHL-004 REV. 12.17.14
27
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