Bedienungsanleitung REMKO ML 525 DC (Seite 28 von 68) (Englisch)

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6.2 Connecting the refrigerant

piping

The refrigerant piping is connected (responsibility

of the customer) on the back side of the units.

Please note that a flare connection is only permis-

sible outside the enclosed room. If this is not pos-

sible on site, the connection of the indoor unit must

be established as a permanent connection (e.g.

soldered).

It may be necessary to fit a reducer or flared

adapter to the indoor unit. These fittings are

included with the indoor unit as an accessory kit.

Once installed, the connections should be insu-

lated to make them vapour dif

fusion proof.

NOTICE!

Installation should only be performed by author-

ised specialists.

NOTICE!

The unit is factory filled with dry nitrogen for

leak testing purposes. The pressurised nitrogen

is released when the union nuts are undone.

NOTICE!

Use only tools which are approved for use in an

HVAC environment. (z. B.: bending pliers, pipe/

tubing cutters, de-burrers and flaring tools). Do

not cut refrigerant pipes with a saw.

NOTICE!

All work must be carried out in a way that pre-

vents dirt, particles, water etc. from entering,

refrigerant lines!

The following instructions describe the installation

of the cooling cycle and the assembly of the indoor

unit and the outdoor unit.

1. The required pipe diameters are given in the

table "T

echnical data".

2. Install the indoor unit and connect the refrig-

erant piping as described in the operating

manual for the indoor unit.

3. Use the wall or floor brackets to fit the out-

door unit against structural parts approved to

support the static load (refer to the installa-

tion instructions for the brackets).

4. Ensure that structure-borne sound is not

transferred to parts of the building. Use vibra-

tion dampers to reduce the ef

fects of struc-

ture-borne sound!

5. Lay the refrigerant piping from the indoor unit

to the outdoor unit. Ensure that the fasten-

ings are adequate and if necessary

, take

appropriate oil return measures!

6. Remove the factory-fitted protective caps and

union nuts on the connections. These should

be used later in the installation process.

7. Before flanging the refrigerant piping, ensure

that the union nut is fitted on the pipe.

8. Prepare the laid refrigerant pipings as shown

below (

Fig. 30 and Fig. 31).

9. V

erify that the shape of the flange is correct

(Fig. 32).

10. First connect and hand-tighten the refrigerant

piping to ensure it is correctly seated.

11. Then tighten the fittings with 2 appropriately-

sized open-ended spanners. Use one

spanner to counter the force when tightening

the fitting (Fig. 33).

12. Use insulation hoses which are designed for

this temperature range and are dif

fusion

proof.

13. Observe the permitted bending radius for the

refrigerant piping during installation. Never

bend a pipe twice in the same place. Brittle-

ness and cracking can result.

14. Apply appropriate heat insulation to the

installed refrigerant piping, including con-

nector

15. T

ake the same action at the shut-off valves

for all subsequent refrigerant piping.

REMKO ML series

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