Bedienungsanleitung Dimplex LA 11MSR (Seite 18 von 48) (Deutsch, Englisch, Französisch)

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English

LA 11MSR

6.2 Heating System Connection

The heating system connections on the heat pump have a

1" external thread. Route the connection hoses out of the device

in a downwards direction. Use a spanner to firmly grip the transi-

tions when connecting the heat pump.

Before connecting the heating water system to the heat pump,

the heating system must be flushed to remove any impurities,

residue from sealants, etc. Any accumulation of deposits in the

liquifier could cause the heat pump to completely break down.

For systems in which the heating water flow can be shut off via

the radiator or thermostat valves, an overflow valve must be in-

stalled in a heating bypass behind the heat pump by the cus-

tomer. This ensures a minimum heating water flow rate through

the heat pump and helps to avoid faults.

Once the heating system has been installed, it must be filled, de-

aerated and pressure-tested.

Consideration must be given to the following when filling the sys-

tem:

Untreated filling water and make-up water must be of drink-

ing water quality (colourless, clear, free from sediments)

Filling water and make-up water must be pre-filtered (pore

size max. 5 µm).

Scale formation in hot water heating systems cannot be com-

pletely avoided, but in systems with flow temperatures below

60 °C the problem can be disregarded.

With medium and high-temperature heat pumps, temperatures

above 60 °C can be reached.

The following standard values should therefore be adhered to

concerning the filling water and make-up water (according to VDI

2035 Sheet 1):

Minimum heating water flow rate

The minimum heating water flow rate through the heat pump

must be assured in all operating states of the heating sys-

tem. This can be accomplished, for example, by installing either

a dual differential pressureless manifold or an overflow valve.

The procedure for adjusting an overflow valve is described in the

Chapter Start-Up. When the minimum flow rate is undershot, the

plate steel exchanger in the refrigerating cycle can freeze, which

can lead to total loss of the heat pump.

NOTE

The use of an overflow valve is only recommended for panel heating and

a max. heating water flow of 1.3 m³/h. System faults may result if this is

not observed.

Antifreeze (frost protection)

Heat pump systems, which cannot be guaranteed to be frostfree,

should be equipped with a drainage option (see Fig.). The anti-

freeze function of the heat pump manager is active whenever the

heat pump manager and the heat circulating pump are ready for

operation. If the heat pump is taken out of service or in the event

of a power failure, the system has to be drained. The heating cir-

cuit should be operated with a suitable antifreeze if heat pump

systems are implemented in buildings where a power failure can

not be detected (holiday home).

6.3 Electrical Connection

A standard three-core cable is used for connecting the heat

pump to the power supply.

The cable must be provided by the customer. The conductor

cross section is selected in accordance with the power consump-

tion of the heat pump (see Appendix Device Information) and the

applicable VDE (EN) and VNB regulations.

A disconnecting device with a contact gap of at least 3 mm (e.g.

utility blocking contactor or power contactor) as well as a 1-pole

circuit breaker must be installed in the power supply of the heat

pump by the customer (tripping current in compliance with the

Device Information).

The control voltage is supplied via the heat pump manager.

The heat pump manager has a 230 V AC-50 Hz power supply.

Connect the controller in compliance with its own operating in-

structions (16 A fuse).

ATTENTION!

The control line is essential for the operation of air-to-water heat pumps

for outdoor installation. The control line must be laid separately from the

mains cable. It is not permissible for the customer to extend the control

line.

The control line (not included in scope of supply) is connected to

the heat pump manager using a multipole plug connector. Use

the plug connector located on the base of the heat pump adja-

cent to the cable gland in the base plate. More detailed informa-

tion can be found in the operating instructions of the heat pump

manager.

See Appendix Circuit Diagrams for detailed information.

Total heat

output in [kW]

Total alkaline earths

in mol/m³ and/or

mmol/l

Total

hardness in dH

up to 200 2.0 11.2

200 to 600 1.5 8.4

> 600 < 0.02 < 0.11

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