Manual Dimplex LA 35TUR plus (page 20 of 56) (English, German, French)

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EN-6 452163.66.06 · FD 9612 www.dimplex.de

English LA 35TUR+

6.2 Condensate pipe

Condensate that forms during operation must be drained off

frost-free. To ensure proper drainage, the heat pump must be

mounted horizontally. The condensate pipe must have a mini-

mum diameter of 50 mm and must be fed into a sewer in such a

way that it is safe from frost. Do not discharge the condensate di-

rectly into clearing tanks or cesspits, as aggressive vapours or a

condensed water pipe which has not been laid in a frost-free

manner could destroy the evaporator.

ATTENTION!

The frost line can vary according to the climatic region. The regulations

of the countries in question must be observed.

7Assembly

7.1 General

The following connections need to be established on the heat

pump:

Heating system flows and returns

Hot water circuit flow and return

Condensate outflow

Control line to the heat pump manager

Voltage supply

7.2 Connection on heating side

The heating system connections on the heat pump are to be

made inside the device. Refer to the device information for the

connection sizes. An optional pipe kit is available as an acces-

sory, which can be used to lead the connections out to the side.

Use a spanner to firmly grip the transitions 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

liquefier could cause the heat pump to completely break down.

ATTENTION!

The dirt trap included in the scope of supply is to be installed in the heat

return before the heat pump.

Cleaning and maintenance instructions can be found in the dirt

trap's installation and operating instructions.

Once the heat pump has been connected to the heating system,

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. 5µm).

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 performance

range (heat pump + boiler combination), flow temperatures 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 hard-

ness 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.

ATTENTION!

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.

Note:

For operation of the heat pump with the four-way reversing valve,

it is essential to set up the hydraulic connections according to the

instructions included in the scope of supply of the valve. The in-

structions give a description of the precise procedure for the cor-

rect assembly of hydraulics. Non-observance of this will lead to

restrictions in the operation of the heat pump.

Important:

The notes/settings in the instructions of the heat pump manager

must always be observed and carried out accordingly; not doing

so will lead to malfunctions.

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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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