9 Starting up
Now it's time to start the system and do the final settings and adjustments.
9.1 Starting the system
Set the heat pump to the desired operating mode in the menu INFORMATION -> OPERAT. The following operating modes are available:
Parameter Meaning
(OFF)
The installation is fully switched off. This mode is also used to acknowledge certain alarms. To select OFF as op-
erating mode, press once to scroll down one step and press once. Press CANCEL to return to the start-
ing point without changing.
AUTO Automatic operation with both heat pump and auxiliary heater permitted. If the number of power stages for
auxiliary heating are set to zero (SERVICE -> AUX. HEATER -> MAX STEP) only AUTO or COMPRESSOR can be
selected as operating mode.
COMPRESSOR Operation with only compressor permitted. (No hot water produced, operation with auxiliary heater not permit-
ted.)
AUX. HEATER Operation with only auxiliary heater permitted.
HOT WATER Operation with heat pump for hot water production and auxiliary heater during peak heating charging (anti-
legionella function).
MANUAL TEST Only displayed when the value for MANUAL TEST is set to 2 in the SERVICE menu. Outputs that control compo-
nents are activated manually.
Remember that it takes time for the heat pump to heat a cold house. It
is best to let the heat pump work at its own pace and NOT raise or al-
ter any values in the control system to try to heat it up more rapidly.
If there is an alarm in conjunction with installation it usually means
that there is air in the system.
Caution In the event of longer periods of downtime and risk of ice build-up in
the system, the heat pump must be drained of water.
9.2 Cold start function
The "COLD START" function is activated when the system temperature is <=20° C and the outdoor unit fails to start. The immersion
heater starts, it runs until the outdoor unit starts and the supply line temperature reaches >20° C. The display text will say "COLD START"
during this process.
The cold start function activates immersion heater step 1, regardless of operating mode.
Commissioning
iTec XT
AWIXT01CG0102 Thermia AB
46
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