Emergency Operation, E Series; How To Activate Emergency Operation; Maintaining Your Heat Pump; Working On The Heat Pump - IVT Greenline D14 Manual To Installation, Commissioning And Maintenance

Emergency operation, E series

If a fault occurs that you cannot remedy, the plant can operate in emergency mode. In this mode the
circulation pump and electric heater are started manually by turning the thermostat wheel on the
electric heater. To get both heating and hot water, the 3-way valve must be set at intermediate
position (the 3-way valve is built-in in the E series) WARNING! Must not be activated during
normal operation.
To reset the alarm: Turn the electric heater thermostat wheel to the required temperature (see
following pages, pos 6). Reset the 3-way valve to manual operation in an intermediate position so
that the electric boiler can heat both the heating system and the immersion heater.
PLEASE NOTE: The control panel alarms for a power failure in emergency operations.

Maintaining your heat pump

Your heat pump normally requires little maintenance, but we recommend occasional checking to
ensure that your heating installation is giving the best possible performance. The description
sometimes refers to a heat pump component. You will find these on page 28 for models 14-16
and page 29 for models 20-40.

Working on the heat pump

•
Switch off the electrical supply before commencing work on the heat pump. Usually there is an
isolating switch on the wall before the heat pump.
•
Only an accredited refrigeration company is permitted to work on the heat transfer fluid circuit.
The installation contains gases that may form toxic fumes when combined with discharges and
naked flames. The gas that forms may cause choking even at low concentrations. If it should leak,
evacuate the room until it has been thoroughly aired.

Normal maintenance

Points to check a few times a year:
•
Sight glass (pos 7): When the heat pump starts, and during rapid temperature changes, you can
sometimes see bubbles in the liquid in the heat transfer fluid circuit for a minute or so. This is
normal.
If there are always bubbles in the sight glass: Contact the installer.
Sight glass
•
Expansion vessel: If the heat pump has a plastic expansion vessel connected to the heat transfer
circuit the level must not fall below 1/3 (the vessel is mounted outside the heat pump).
For low fluid level: With the pump working, remove the lid to the valve at the top of the vessel
and open the valve. Fill with antifreeze or clean water (simplest with a watering can). Shut the
valve again and screw on the lid.
Ball valve with lid