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Page
TEMPERATURE SETTINGS ON THE PCB
(WITHOUT REMOTE CONTROLLER)
WARNING
• Adjust the appropriate DIP switches according to model and temperature as shown
below. DO NOT adjust the other DIP switches.
• Turn off the power supply to the water heater before changing the DIP switch set-
tings.
• Failure to observe these warnings could lead to carbon monoxide poisoning, severe
personal injury, or death.
• There are 2 preset temperatures , 120 °F (50 °C) and 140 °F (60 °C), that you can select by changing the DIP
switch settings on the computer board without the remote controller. See below.
• To reduce the risk of scalding, install Thermostatic Mixing Valves (temperature limiting valves) at each point
of use.
• When the remote controller is in normal operation, the set temperature of the remote controller is given
priority over the set temperature of the DIP switch settings.
The temperature has been preset at the factory to 120 °F (50 °C).
Computer board
120 °F (50 °C)
DEFAULT
140 °F (60 °C)
No. 9 : OFF
No. 9 : ON
240HX3/340HX3
OFF
ON 1 2 3 4 5 6 7 8 9 10
OFF
ON 1 2 3 4 5 6 7 8 9 10
Bank of
DIP switches
NOTE:
The dark squares indicate the correct DIP switch positions.
(Lower bank of DIP switches)
120 °F (50
°C)
DEFAULT
140 °F (60 °C)
OFF
ON 1 2 3 4 5 6
No. 5 : OFF
OFF
ON 1 2 3 4 5 6
2 3 4 5 6
No. 5 : ON
540HX3
Computer board
Upper bank of
DIP switches
Lower bank of
DIP switches
FLOW
Appliance/Use
Flow rate
GPM (US)
L/min
Lavatory Faucet
1.0
3.8
Bath Tub
4.0 – 10.0
15.2 - 37.8
Shower
2.0
7.5
Kitchen Sink
1.5
5.6
Dishwasher
1.5
5.6
Washing machine
4.0
15.2
Household Flow Rates
Taken from UPC 2006
• The flow rate through the water heater is limited to a
maximum of 6.6 GPM (25 L/min) for the 240HX3 model, 8.0
GPM (30 L/min) for the 340HX3 model, and 10.0 GPM (38 L/
min) for the 540HX3 model.
• The flow rate capacity of the water heater will vary based on
temperature difference of the set temperature and supply
water temperature. Flow Capacity tables are located on page
63.
• The table to the right provides typical household plumbing
fixture flow rates.
Normal Operation
Owner's Guide
Summary of Contents for 240HX3
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