Danfoss DHP-R 26 Bedienungsanleitung

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Danfoss Heat Pumps

DHP-R

Electrical Installation Instructions

VWBME102

VWBMD102Electrical Installation Instructions DHP-R – 2

Danfoss DHP-R 20 . . . . . . . . . . . . . . . . . . . . . 4–10

Danfoss DHP-R 26 . . . . . . . . . . . . . . . . . . . .11–17

Danfoss DHP-R 35 . . . . . . . . . . . . . . . . . . . . 18-24

Danfoss DHP-R 42 . . . . . . . . . . . . . . . . . . . . 25-31

Danfoss DHP-R 21 H . . . . . . . . . . . . . . . . . . 32-38

Danfoss DHP-R 25 H ..................39-45

Electrical Installation

Danfoss DHP-R heat pumps are internally prepared at the factory. The wiring that requires connec-

tion are the power supply (5 core) and the wiring between the outer control cabinets and the heat

pump.

No separate operating voltage needs to be connected to the heat pump, however, if required a

separate operating voltage can be connected to the terminal block marked 2L1 and the bridge

between L1 and 2L1 can be removed. If separate operating voltage is supplied, it must be clearly

marked that external voltage is attached to the heat pump, if the operating power is not connected

through the same circuit breaker as the power supply.

All wiring must be routed according to the applicable regulations under the supervision of an elec-

trician and dimensioned to the applicable regulations, observe any local regulations, contact the

power company if uncertain.

On the rear side at the left-hand lower edge there are cable lead-ins.

The electrical installation must occur with the fixed prelaid cables and an all pole circuit breaker in

the fixed installation.

NOTE! Bridge between terminal block 123 and 124

When connecting a pressure or flow switch in the coolant circuit, remove the bridge between ter-

minal block 123 and 124 (this bridge is connected at the factory)

If the coolant pump is to be started and stopped via separate external switch (passive cooling), this

is connected to terminal block 127-128, potential free connection.

WARNING! The circuit breaker must be switched off to stop the current to the heat pump.

NOTE! The control computer sensor cables transfer small weak currents, ambient interference can

affect them and give incorrect information to the control computer. It is therefore important that

care is taken when laying the cables. The low current cables must be kept well separated from the

high current cables. It is important that the low current cables are routed parallel to the high current

cables and are kept at a distance of at least 25 cm at lengths of up to 100 m, after that the distance

increases.

Contents

VWBMD102 Electrical Installation Instructions DHP-R – 3

Important information

Before the heat pump is supplied with voltage you must ensure that the heating system and coolant

system are filled and bled of air otherwise the circulation pumps can be damaged.

If the electrician wishes to test his connections before the above is carried out, this should only done

when it has been checked that the coolant pump, the condenser pump, the hot gas pump and the

compressor are disconnected.

󰥎

24 VAC 1 must not be connected together with:

• 24 VAC 2

• 24 VDC

• Other equipment that uses 0-10V control signal

• Signal ground GND

24 VAC 2 must only be used as power supply to:

• External equipment that requires 0-10V control

signal

• Auxiliary modules

The two separate 24 VAC circuits must never be connected to each other or to protective ground.

The total power load on 24 VAC 1 respectively 24 VAC 2 must not exceed 50VA.

VWBMD102

Electrical Installation Instructions DHP-R – 4

VWBMD102 Electrical Installation Instructions DHP-R – 5

VWBMD102

Electrical Installation Instructions DHP-R – 6

VWBMD102 Electrical Installation Instructions DHP-R – 7

VWBMD102

Electrical Installation Instructions DHP-R – 8

VWBMD102 Electrical Installation Instructions DHP-R – 9

VWBMD102

Electrical Installation Instructions DHP-R – 10