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Installation and Operation Manual RTC 12i - www.regulus.eu
4. COMMISSIONING
4.1. Initial start up
Commissioning must be carried out by a service provider with a valid authorization issued by
REGULUS.
Commissioning checklist:
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Check that the heat pump and system are filled with water, air bled.
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Check connections for leaks.
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Check that both the sensors and the circulation pump are connected to the power supply.
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Switch on the heat pump through the controller.
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When the system heats up, check that the connections are properly tight, the system is
vented, supplying heat and possibly hot water (heating test and leak test).
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Set the required heating curves and time programs.
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Inform the future user about the location of the main switches, circuit breakers and their
function.
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Inform the future user about other safety features and indicators (safety valves, pressure
gauges, analogue thermometers, etc.) and their functions.
-
Inform the future user about the controller control, user menu, etc.
The service provider shall fill in
the Checklist
and the heat pump owner shall sign it.
4.2. Troubleshooting
If a fault occurs, you should always contact the installation company that installed your unit. If the
supplier considers that the fault is caused by a material or design defect, the installation company
will contact the supplier and repair the defect. Always report the serial number of the heat pump
(indicated on the label on the back of the heat pump).
Air in system
If you hear a raspy sound from the heat pump, make sure that it is completely air bled. If necessary,
top up the system to operating pressure. If the problem persists, call a technician to determine the
cause.
Error messages
All error messages and information texts are displayed on the controller that controls the heat pump.
For more information, consult the instructions for the corresponding controller.
Heating water circulation
If the circulation between the indoor unit and the outdoor unit slows down or stops completely, the
high pressure switch closes. Possible causes are:
-
defective / undersized circulation pump
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air in pipes
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clogged condenser
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other obstacles to water flow
Defrosting
The fan stops during the defrosting cycle, but the compressor is still running. Melted ice flows
into the condensate tray under the heat pump. As soon as defrosting is completed, the fan starts
up again and a cloud of fumes formed by moist air may form for a short time. This is a perfectly
normal phenomenon that disappears after a few seconds. On frosty days, check for ice in unusual
places (heat pump legs, condensate tray, fan, etc.). Possible causes can be: defective defrosting
automation, lack of refrigerant (leakage), extreme weather conditions.
