Leak test – REMKO RKS 435 H User Manual

Page 11

10.� Che�k that the border ha�� the

�orre�t ��hape (Figure ).�

11.� �ir��t �onne�t the refrigerant

pipe�� to the blo�king valve�� by
hand to en��ure a �orre�t fit.�

12.� Then permanently ��e�ure the

��rew atta�hment�� u��ing 2
��panner�� of appropriate ��ize.�
While tightening, alway�� hold
with a ��panner (Figure ).�

13.� �it the two in��talled refrigerant

pipe��, in�luding the �onne�tor��,
with appropriate heat in��ula-
tion.�

14.� Only u��e in��ulation ho��e�� that

are ��uitable for u��e and ��uf-
fi�iently re��i��tant to diffu��ion in
the relevant temperature range.�

Additional installation in-
structions

■�

When the outdoor unit i�� u��ed
in �ombination with �ertain in-
door unit��, the refrigerant pipe��
may need to be �onne�ted in
a different way.� �f ��o, fit the

�f ��o, fit the

redu�ing or expanding ��rew
atta�hment�� upplied to the
indoor unit.�

■�

�f the ba��i� length of the �on-
ne�tion line i�� greater than 5m,
refrigerant mu��t be added to
the ��y��tem during initial opera-
tion.�
See “Adding refrigerant” ��e�-
tion

Leak test

On�e all �onne�tion�� have been
made, the manometer ��tation i��
atta�hed to the �orre��ponding
S�hrader valve �onne�tion��, if fit-
ted:
red

�� mall valve

�� inje�tion pre��ure

blue �� large valve

�� large valve

�� u�tion pre��ure

After �onne�tion, the leak te��t i��
performed with dry nitrogen.�

The leak te��t involve�� praying
the �onne�tion�� fitted with leak
dete�tion ��pray.� �f bubble�� an be

�f bubble�� an be

��een, the �onne�tion i�� not fitted
�orre�tly.�
�n thi�� a��e, tighten the ��rew at-
ta�hment or �reate a new border.�

After a ��u��e��ful leak te��t, the
ex�e�� pre��ure i�� removed from
the refrigerant pipe�� and a va�uum
pump with an ab��olute final partial
pre��ure of at lea��t 0.�01 mbar i��
��tarted up to �reate a va�uum in
the pipe��.� Thi�� al��o remove�� any

Thi�� al��o remove�� any

re��idual moi��ture from the pipe��.�

A vacuum of at least
0.05 mbar abs. must be
created!

CAUTION�

The time taken to �reate the
va�uum depend�� on the pipe
volume in the indoor unit and the
length of the refrigerant pipe��, but
the pro�e�� definitely take�� at lea��t
0 minutes

.�

On�e foreign ga��e�� and moi��ture
have been �ompletely removed
from the ��y��tem, the valve�� on the
manometer ��tation are �lo��ed and
the valve�� on the outdoor unit are
opened a�� de��ribed in the “�nitial
operation” ��e�tion.�

Only tools that are approved
for use on refrigeration equip-
ment may be used.
Pipe cutters, deburrers and
bordering tools.

NOTE

Correct border shape

Tightening with 1

��t

��panner

Holding with
2nd ��panner

Tightening screw attachments

Tightening

torque:

1 4

“ 12-16 Nm

3 8

“ 28-32 Nm

1 2

“ 40-44 Nm

5 8

“ 64-68 Nm

This manual is related to the following products:

RKS 448 H