27
WHL-004 REV. 12.17.14
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.
NOTICE
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.
Figure 20
– Dip Switch Detail
DIP SWITCH GROUP
DIP SWITCH
OFF
ON
1
– 3
NOT USED
NOT USED
4
NOT USED
NOT USED
5
Gas Type
LP
NG
6
High Fire
Normal
High Fire
7
Low Fire
Normal
Low Fire
Table 16
– DIP Switch Group
SYSTEM CONTROL SETTINGS
MAXIMUM FLAME DETECTING VOLTAGE
2.5V
PRE-PURGE TIME (Tp)
Maximum 10 seconds, minimum 1 second
SAFETY TIME (IGNITING TIME) (Ts)
3.5 seconds
IGNITING INTERVAL TIME
<10 seconds
POST-PURGE TIME (Tip)
3 minutes
OVER-HEATING 1,2,3 PROTECTION DETECTION TIME
<1 seconds
TEMPERATURE SENSOR FAULT DETECTION TIME
<2 seconds
# OF IGNITION ATTEMPTS (Ntl)
10
DHW SET TEMPERATURE RANGE
95
o
F (35
o
C) - 140
o
F (60
o
C)
DHW OFF TEMPERATURE
DHW Target Tempe DHW Differential Temperature
50
o
F (10
o
C)
DHW ON TEMPERATURE
Below DHW Target Temperature 41
o
F (5
o
C)
DHW WATER ON MINIMUM WATER FLOW
.5 gallons (2 liters) (12Hz)
DHW WATER OFF MINIMUM WATER FLOW
.4 gallons (1.5 liters) (8Hz)
Table 17
– System Control Settings
