Bosch 11 KW Instruction Manual download pdf (Page 24)

INSTALLATION

6 720 806 768 (2013/02)24

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.

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.

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.

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.

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.

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.

The particle filter is installed in the return heating pipe to

the heat pump ( [E21.V101], chapter 11.2.2).

WARNING:

▶ Never block the safety valve outlet.

6 720 641 855-33. 1I

min

max

min

max

ext. in

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.

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.

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Bosch 11 KW Instruction Manual Page 24

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