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 the minus sign once to scroll down one step and press the right arrow once. Press CANCEL
to return to the starting 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 Adaptation of the heating system
The circulation pump settings may have to be adjusted to fit the heating system, for instance an underfloor heating or radiator system.
The delta temperature (the difference between the supply line and return line) should be 7–10°C. If this is not reached, the flow of the
circulation pump may need adjusting depending on the applicable heating system.
The circulation pump must provide sufficient flow in the system. This to ensure that the defrosting of the outdoor unit is secured and to
allow the heat pump to start.
Sufficient flow is indicated by an "F" in the default display (flow sensor closed).
Commissioning
iTec
Thermia Värmepumpar VIJSR102
41
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