American Water Heater 318281-000 Startup / System Settings, S3, S4, Recommended setting

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 flow Display range -40 to +482 °F

hP:

Operating hours counter Display channel

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 flow 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 is permanently 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 will be flashing and the operating hours will be set to 0. In order to finish the reset procedure the set button (3) must be pressed in order to confirm.

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.

Once the final 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

2.0to 40.0 °F Default setting 12.0

Recommended setting: 10.0

Shows the current system configuration 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