Technical data

OPERATION
6 720 803 687 (2012/11)46
6.2.24 COMMISSIONING OF THE AIR TO WATER HEAT PUMP AT
OUTSIDE TEMPERATURES OUTSIDE THE STANDARD
OPERATING RANGE
The air to water heat pump must only be commissioned if the entire
system, including condensing boiler, is connected and ready for
operation. At outside temperatures in excess of 21 °C or below -9 °C, the
air to water heat pump will not start in standard mode, as there is no heat
demand [for the heat pump] in this temperature ranges.
The “Service mode” function of the hybrid control module enables the air
to water heat pump to be commissioned outside the standard operating
temperature range.
Setting “Service mode” at the hybrid control module:
▶ Press “Back” until the parameter list is displayed. (“c” is displayed on
the right hand side of the display).
▶ Turn "Rotary selector" until "5C" is displayed.
▶ Push “Rotary selector” once.
default “0” begins to flash.
▶ Turn the “Rotary selector” to change the value to “1”.
▶ Press the “Rotary selector” to set the value.
“Service mode” is now activated.
6.2.25 INFORMING THE CUSTOMER AND HANDING OVER THE
TECHNICAL DOCUMENTS
▶ Make your customer familiar with the entire heating system and the
operating instructions of the hybrid system.
▶ Turn the system off and then back on to show your customer how the
unit works.
▶ Using the operating instructions, explain to your customer how to act
in case of emergencies. e.g. when there is a fire.
▶ Hand over the technical documents to your customer and together
with your customer complete the separate commissioning report and
sign it.
7 OPERATION
The hybrid control module regulates the hours at which the air to water
heat pump and the condensing boiler operate, subject to the parameters
selected at the FW200.
▶ Never interrupt the power supply to the hybrid manager and the
external unit during normal operation.
7.1 AUTOMATIC DEFROST FUNCTION
At low temperatures ( 7 °C), ice forms on the external unit.
In the outside temperature range from +7 °C to -9 °C the heat from the
heating system water is briefly used to defrost the external unit
automatically. During defrosting, the heat source continues to be
available for heating the heating water.
The defrost process takes approximately 5 minutes.
7.2 SYSTEM SHUTDOWN
7.2.1 REGULAR SYSTEM SHUTDOWN
Taking the hybrid system out of use:
▶ Ensure any current or pending heat demands are removed. To do this
switch the FW200 room controller to frost protection mode (refer to
FW200 installation manual) and allow the system to stop under it's
own control.
▶ When the system has stopped, wait at least 5 minutes before
interrupting the power supply to the hybrid manager. The hybrid
manager, outdoor unit or the boiler could be damaged if the unit is
switched off before 5 minutes of idle time.
7.2.2 SYSTEM EMERGENCY SHUTDOWN
Explain to your customer how to act in case of emergencies, e.g. when
there is a fire or when refrigerant escapes.
▶ Never risk your own life. Your own safety is paramount.
▶ Close the main fuel shut-off valve. Only if safe to do so.
▶ Isolate the heating system from the mains power supply by means of
the heating system emergency stop switch or the appropriate
domestic fuse/circuit breaker. Only if safe to do so.
“Service mode” resets automatically after 20 minutes.
The air to water heat pump only starts if the return
temperature lies between 20 °C and 50 °C. It may be
necessary for the condensing boiler to initially raise the
return temperature to 20 °C before the air to water heat
pump can start.
NOTICE: Frost damage!
When the heating system is switched off, it can freeze up
if there is a frost.
▶ In case of a risk from frost, protect the heating system
against frost damage. To do so, drain the heating
water at the lowest drain point of the heating system.
When draining also ensure that the air vent at the
highest point in the heating system is open.
The hybrid manager regulates the hours at which the air
to water heat pump and the condensing boiler operate,
subject to the parameters selected at the FW200
programming unit or at the hybrid control module.
▶ Never interrupt the power supply to the hybrid
manager and the external unit during normal
operation.
Only interrupt power via the installation room fuse/
circuit breaker in emergencies.
For any other purpose follow the procedure described
above.