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INSTALLATION
13.4 HEATING SYSTEM
PARTICLE FILTER (INTEGRATED IN 6-11 SYSTEM)
A particle filter for the heating system is included in the delivery of 6-11
Combi and should be installed on the connection for the heating
system's return line.
The particle filter is installed in the return heating pipe to
the heat pump ( [E21.V101], chapter 11.2.2).
HEAT CARRIER PUMP
Factory setting for the heat carrier pump is ext. in ( Figure 22). The
factory setting (ext. in) on the heat carrier pump must not be changed
using the dial, the pump settings are controlled from the control unit.
Fig. 22
SAFETY VALVE AND EXPANSION VESSEL
An expansion vessel sized according to the system requirements and
pressure relief safety valve should be fitted as per stated in
Chapter 11.2.1.
WARNING:
▶ Never block the safety valve outlet.
13.5 SITING THE APPLIANCE
Noise transfer to adjacent areas must be taken into consideration when
choosing a position for the heat pump ( Chapter 11.3 for sound
levels).
13.6 PIPEWORK PREPARATIONS
▶ Connection pipes for the collector system, heating system and
possible hot water should be installed in the premises to the heat
pump location.
▶ An expansion vessel, a safety group and a pressure gauge should be
mounted in the heating circuit.
▶ Mount the filling unit in a suitable place in the collector circuit.
24
ext. in
min
min
max
max
6 720 641 855-33. 1I
13.7 FLUSHING THE HEATING SYSTEM
FOLLOW THE GUIDANCE OF BS7593:
Treatment of water in domestic hot water central heating and also the
flushing guidelines below.
NOTICE: Artificially softened water must not be used to
fill the central heating system.
NOTICE: If required the fitting of a magnetic particle
system filter can be fitted to the heating return pipe
work.
FLUSHING THE SYSTEM
▶ Fill the system with cold water and check for leaks.
▶ Open all drain cocks and drain the system.
▶ Close drain cocks and add a suitable flushing agent compatible with
aluminium at the correct strength for the system conditions in
accordance with the manufacturer's instructions.
The pH value of the system water must be less than 8 or the
appliance guarantee will be invalidated.
▶ Circulate the flushing agent before the heat pump is connected.
▶ Run the system at normal operating temperature as directed by the
manufacturer of the flushing agent.
▶ Drain and thoroughly flush the system to remove the flushing agent
and debris.
▶ It may be necessary to use a power flushing machine to aid the
cleansing procedure in some circumstances.
▶ Close the drain cocks and refill with fresh water and a suitable
inhibitor.
▶ Vent any air from the boiler and system.
▶ Clean the particle filter.
INHIBITOR/ANTIFREEZE
Add a suitable inhibitor or combined inhibitor/anti-freeze, if the system
is exposed to freezing conditions, to the heating system in accordance
with BS7593 and manufacturer's guidelines. In special cases where
increased protection is required Gylcol can be added with a maximum
concentration of 15%, Heat Pump performance will decrease.
WARNING: Sealing agents
▶ Normally the addition of sealing agents to the system
water is not permitted as this can cause problems
with deposits left in the heat exchanger.
▶ In cases where all attempts to find a micro leak have
failed, Worcester, Bosch Group supports the use of
Fernox F4 leak sealer.
13.8 SETTING UP
▶ Remove packing, taking care to observe the instructions on the
packing.
▶ Remove the supplied accessories.
▶ Install the supplied adjustable feet and adjust the height.
13.9 HEAT INSULATION
All heat transfer and collector circuits must have suitable heat and
condensation insulation according to applicable norms.
6 720 806 768 (2013/02)
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