A.O. Smith AHD 290 - Manual (Page 54)

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1. User guide
The AHD 290 comes with a factory setup, which enables an immediate start
of the unit. The factory setup is basic and must be adjusted to the operational
requirements and demands of the individual home, in order to obtain the optimum
operating benefit from the unit.
1.1 Use
User menu
The value of a menu item is shown when pressing the key/key combination
below. The value may be changed with the arrows when the key/key combination
is held down simultaneously. The control will return to standard indication if no
buttons have been pressed for app. 15 seconds.
P1: Heat Pump ON/OFF
On this button it is possible to change the function between:
standby and automatic operation after setpoint P3. (step 0, step 1)
Step 0: The heat pump is now off and only the control is active.
Step 1: The heat pump is in operation mode and drives after
setpoint thermostat P3.
P2: Operation for the electrical cartridge
The heat pump comes with an extra electrical cartridge for heating of
the sanitary hot water. On this button it is possible to turn on the elec-
trical cartridge if required. By adjusting the setpoint to 1 the electrical
cartridge will turn on after setpoint P5 (operating
thermostat for the electrical cartridge). The electrical cartridge is not
on if this setpoint it set to 0.
Note! When the ambient temperature is under 8°C or over 35°C the
electrical cartridge will turn on even if P2 = 0.
P3: Operating thermostat for heat pump
The required sanitary water temperature may be set between
0 - 55°C, which is heated up by the heat pump.
Factory setting: 52°C
Max. water temperature: 55°C
P4: Stop defrosting
The level and operating thermostat buttons are pressed simultaneous-
ly
As a standard setting, the defrosting period ends when the tempera-
ture has reached 10°C. During extraordinary operating conditions, it
may be necessary to change this temperature. The temperature may
be adjusted between 0-25°C.
Factory setting: 10°C
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