Installation Guide

61 Page
SETTING THE TEMPERATURE ON THE PCB (WITHOUT BUILT-IN
CONTROLLER or REMOTE CONTROLLER)
There are two preset temperatures (120°F (50°C) and 140°F (60°C)) that you can select when the tem-
perature controller is inoperable. To do so, adjust the appropriate DIP switch as shown in the table below.
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.
Normal Operaon
Owner's Guide
NOTE: Only change the switches with dark squares. The dark squares indicate the correct DIP
switch positions.
The temperature has been preset at the factory to 120 °F (50 °C).
Middle bank of DIP switches
120 °F (50 °C)
DEFAULT
140 °F (60 °C)
1 2 3 4 5 6
ON
No.5 : OFF
1 2 3 4 5 6
ON
No.5 : ON
WARNING
 DO NOT adjust any other DIP switches except the No. 5 of the middle bank
of DIP switches for the setting temperature.
 Turn off the power supply to the water heater before changing the DIP
switch settings.
 Failure to observe these warnings could lead to carbon monoxide poison-
ing, severe personal injury, or death.
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
 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 10.0 GPM (38 L/min) for the
540P model.
 The temperature setting, along with the supply
temperature of the water will determine the flow
rate output of the unit.
 Please refer to the temperature vs. gallons per
minute charts on p. 76 to determine the likely flow
rates based on your local ground water temperature
and your desired outlet water temperature.
 Refer to the table to the top right for typical household plumbing fixture flow rates to determine what
the water heater can do in a household application.
 Based on the United States Department of Energy
method of testing water heater output, the water
heater is rated for gallons per minute (GPM) (liters
per minute (L/min)) for Natural Gas and Propane,
when raising the water temperature by 77 °F (43 °C)
(from 58 °F to 135 °F (14 °C to 57 °C)). See the chart
on the right.
Unit: GPM (L/min)
Model Flow rate
540P
Indoor
4.9 (15.1)
Outdoor
Middle bank
of DIP switches
Lower bank of
DIP switches
Upper bank of
DIP switches