REMKO RXS xxx H - Manual (Page 13)

Tightness check
Once all the connections have
been established, the pressure
gauge station is attached as
follows to the Schrader valve (if
fitted):
red = small valve
= injection pressure
blue = large valve
= suction pressure.
Once connected, perform a
tightness test using dried nitrogen.
The tightness test involves
spraying a leak detection spray
onto the connections. If bubbles
are visible, the connections have
not been properly made.
Re-tighten the connection or
prepare a new flange.
If the tightness test is successfully
completed, depressurise the
refrigerant pipes and start a
vacuum pump with an absolute
final partial pressure of min. 10
mbar to remove the air in the pipe.
Any humidity present in the pipes
is also removed.
A vacuum of min. 20 mbar
must be created!
CAUTION
The time required to generate
the vacuum is dependent on
the pipework volume of the
indoor unit and the length of the
refrigerant pipes. This always takes
at least 60 minutes.
Once any foreign gases and
humidity have been completely
extracted from the system, the
valves on the pressure gauge
station are closed and the valves
on the outdoor component are
opened as described in the chapter
on "Commissioning".
Condensation
connection
If the temperature falls below
the dew point, condensation will
form on the cooling fins in heating
mode.
The lower part of the outdoor
component housing is formed in
the shape of a collection tray. The
condensate connection included
in the scope of delivery is to be
attached here.
■
The condensation pipe should
have a fall of min. 2 %. This
is the responsibility of the
customer.
If necessary, fit vapour diffusion
tight insulation.
■
When operating the unit at
outdoor temperatures below
0 °C, ensure the condensation
pipe is laid to protect it against
frost. The lower part of the
housing is also to be kept frost
free by the customer, in order
to ensure permanent draining
of the condensate.
If necessary, fit supplementary
pipe heating.
■
After completed routing, check
for unobstructed condensation
discharge and ensure that a
permanent seal is provided.
Electrical connection
A mains supply cable and six-core
control cable must be laid to the
outdoor component and indoor
unit respectively.
We recommend that screened
control cables are used with
a minimum cross-section of
1.5 mm².
Connecting the outdoor
component
Before making the connection,
observe the following notes:
■
Customers should install a
terminal box in the vicinity of
the outdoor component.
We recommend that a main/
repair switch is installed.
■
Voltage is supplied to the
indoor unit through the
connection cable between the
outdoor component and indoor
unit.
■
Details concerning the electrical
protection of the system are
given in the technical data.
■
If the outdoor component is
installed on a roof, ensure it
is protected against lightning
strikes.
Check all plugged and clamped
terminals to verify they are
seated correctly and making a
permanent contact. Re-tighten
as required.
CAUTION
Additional sensor and control
cables may be required on
some indoor units.
NOTE
All electrical installation
work should be performed
by specialist contractors.
Isolate the voltage supply
when connecting the electrical
terminals.
CAUTION
13