Bedienungsanleitung Dimplex SI 130TU (Seite 21 von 56) (Deutsch, Englisch, Französisch)

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www.glendimplex.de 452237.66.52a · FD 0204 EN-5

SI 130TU English

7Installation

7.1 General

The following connections need to be established on the heat

pump. The hydraulic integration diagram must be adhered to:

Flow and return of the brine (heat source system)

Flow and return of the heating system

Temperature sensor

Voltage supply

7.2 Connection on the heating side

CAUTION!

Flush the heating system prior to 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.

Once the heat pump has been connected to the heating sys-

tem, it must be filled, de-aerated and pressure-tested.

CAUTION!

The maximum test pressure in the heating circuit and the

brine circuit is 6.0 bar.

This value must not be exceeded.

The following points must be observed when filling the system:

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

drinking water quality.

(colourless, clear, free of sediments)

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

pore size 5 µm).

Scale formation in domestic hot water heating systems cannot

be avoided, but in systems with flow temperatures below 60 °C,

the problem can be disregarded. With high-temperature heat

pumps and in particular with bivalent systems in the higher per-

formance range (heat pump + boiler combination), flow tem-

peratures of 60 °C and more can be achieved. The following

standard values should therefore be adhered to with regard to

the filling and make-up water according to VDI 2035, sheet 1:

The total hardness values can be found in the table.

Fig. 7.1:Guideline values for filling and make-up water in accordance with

VDI 2035

For systems with an above-average specific system volume of

50 l/kW, VDI 2035 recommends using fully demineralized

water and a pH stabiliser to minimize the risk of corrosion in the

heat pump and the heating system.

CAUTION!

With fully demineralized water, it is important to ensure that

the minimum permissible pH value of 7.5 (minimum

permissible value for copper) is complied with. Failure to

comply with this value can result in the heat pump being

destroyed.

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 system.

This can be accomplished, for example, by installing a dual dif-

ferential pressureless manifold.

The frost protection function of the heat pump manager is ac-

tive whenever the heat pump manager and the heat circulating

pumps are ready for operation. The system must be drained if

the heat pump is taken out of service or in the event of a power

failure. If heat pump systems are implemented in buildings

where a power failure cannot be detected (holiday homes etc.),

the heating circuit should be operated with suitable frost pro-

tection.

7.3 Heat source connection

The following procedure must be observed when making the

connection:

Connect the brine pipe to the heat source flow and return of the

heat pump.

The hydraulic integration diagram must be adhered to.

CAUTION!

The supplied dirt trap must be inserted in the heat source inlet

of the heat pump to protect the evaporator against the ingress

of impurities.

The brine must be produced prior to charging the system. The

brine concentration must be at least 25 %. This guarantees

frost protection up to approx. -14 °C.

Only monoethylene glycol or propylene glycol-based antifreeze

may be used.

The heat source system must be de-aerated and checked for

leaks.

CAUTION!

The brine must contain at least a 25 % concentration of a

monoethylene glycol or propylene glycol-based antifreeze,

which must be mixed before filling.

NOTE

ºººº

If necessary, the operating range can be extended to a brine

inlet temperature of -10 °C. In this case, the minimum brine

concentration must be adjusted to 30 %. (Freezing

temperature -17 C°).

CAUTION!

The maximum test pressure in the heating circuit and the

brine circuit is 6.0 bar. This value must not be exceeded.

CAUTION!

A suitable de-aerator (micro bubble air separator) must be

installed in the heat source circuit by the customer.

Total heat

output in kW

Total alkaline earths

in mol/m³ and/or

mmol/l

Specific system volume

(VDI 2035) in l/kW

< 20 20 < 50 50

Total hardness in °dH

< 50 2.0 16.8 11.2

< 0.111

50 - 200 2.0  11.2 8.4

200 - 600 1.5 8.4 < 0.111

> 600 < 0.02 < 0.111

1. This value lies outside the permissible value for heat exchangers in heat

pumps.

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