American Water Heater 318281-000 Instruction Manual page 27

STARTUP / SYSTEM SETTINGS
The AC power cord should be plugged in to an appropriate 115V outlet. The controller will enter an initialization phase
in which the operating control lamp will flash red and green. After the initialization period the controller will be in
automatic operation with the default settings active.
The pre-adjusted system scheme is ARR 1. Other system settings are available, but this setting should not be
changed for the system included in this package.
The controller is now ready for operation. The following system settings should be made as indicated. The operational
system channels are listed in order of appearance by pressing the forward (1) button.
COL:
Collector Temperature
Display range: -40 to +482 °F
TST:
Tank temperature
Display range: -40 to +482 °F
S3, S4:
Additional sensor temperature
Display range -40 to +482 °F
TRF:
Temperature return fl ow
Display range -40 to +482 °F
hP:
Operating hours counter
Display channel
Once the fi nal display channel is reached the remaining system setting channels may only be accessed by holding the forward
(2) button down for approximately 2 seconds. The following setting channels will then be shown:
ARR:
System arrangement setting
DTO:
Switch-on temperature diff.
Adjustment range
2.0 to 40.0 °F
Default setting 12.0
Recommended setting: 10.0
Shows the current collector temperature.
Shows the current tank temperature (from tank bottom
sensor).
Shows the current temperature of the corresponding optional
sensor (without control function).
S3 and S4 are only indicated if the temperature sensors are
connected.
Shows the current temperature of the optional temperature
return fl ow sensor (S4) when the heat quantity measurement
option is activated.
The operating hours counter adds up the solar operating
hours of the pump. Full hours are shown on the display.
The total operating hours can be reset. When the operating
hours channel is selected the symbol
shown in the display. The set button (3) must be pressed for
approximately 2 seconds in order to go into the reset mode
for the counter. The display symbol
the operating hours will be set to 0. In order to fi nish the reset
procedure the set button (3) must be pressed in order to
confi rm.
In order to interrupt the reset procedure no button should be
pressed for about 5 seconds. The controller will automatically
return to the indication mode with the previous total.
Shows the current system confi guration setting. Arrangement
1 should be used for the system in this package and this
setting should not be changed.
Primarily the controller works in the same way as a standard
differential controller. If the switch-on difference, DT O
(collector temperature sensor reading minus the tank sensor
reading), is reached the pump is activated.
27
is permanently
will be fl ashing and