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3.3.2 Splitting/Installation of air handling unit sections Connector pipes must be insulated to the extent required.
RX/HC with full refrigerant circuit
For separation/installation to other air handling unit sec-
tions, see the separate installation instructions for each
GOLD.
RX/HC with split refrigerant circuit
The outer section in RX/HC housing the compressor is pre-
filled with refrigerant, the other outer section is prefilled
with nitrogen.
RX/HC is divided into three sections, see the separate
installation instructions for each GOLD.
All brazing must be carried out with a shield gas.
All the cover panels at the rear of the air handling unit
(torx screws) are to be removed to gain access for contin-
ued work.
NOTE! The sections must not be transported when
the cover plates are removed.
NOTE!
The work below may only be performed by certified
refrigeration technicians.
There are lead-throughs in the lower edge of the centre
section for a supply air fan on the lower level. There are
pipe lead-throughs in the upper edge of the upper level
for a supply air fan. See the basic circuit diagram.
There are four refrigerant pipes (of which two to the sub-
cooling circuit) in each outer section. The refrigerant pipes
are closed at the ends. Braze loose ends on all refrigerant
pipes.
There are connector pipes supplied in some of the outer
sections.
Refrigerant pipes and connector pipes are numbered 1-4.
Refrigerant pipe 1 should be paired with connector pipe 1
etc.
Basic circuit diagram
Outer section
Centre section Outer section
Upper level
Lower level
-/+
Refrigerant pipes
Connector pipes
(4 pcs.)
Pipe lead-throughs (4 pcs.)
The illustration shows RX/HC as seen from the back in an air handling
unit with the supply air fan on the lower level. The refrigerant pipes are
placed on the top edge of the upper level with the supply air fan on the
upper level, see dashed lines.
We reserve the right to alter specifications.
Refrigerant pipes
(4 pcs.)
Pipe lead-throughs (4 pcs.)
This can occur during or after installation of connector
pipes.
The connector pipes are delivered in appropriate lengths
and do not need to be cut.
NOTE! In order to facilitate access, work to solder the con-
nector pipes is to be started in the outer section with coil.
Solder the connector pipes on the refrigerant pipes in the
outer section with coil.
The outer section (with coil) is slid into the centre section,
at the same time as the connector pipe is guided through
the centre section via the rubber seals in the pipe lead-
throughs. Be careful not to damage the pipes!
Outer section
with coil
Upper level
Lower level
-/+
Screw the outer section (with coil) to the centre section.
The outer section with compressor is slid into the centre
section.
-/+
Screw the outer section (with compressor) to the centre
section.
Solder the connector pipes to the refrigerant pipes in the
outer section (with compressor).
Connect hoses marked HP, LP and LIQUID to each service
outlet in the centre section (behind the inspection cover).
(4 pcs.)
Leakage test, vacuum the refrigerant circuit and open the
taps (x4) to fill the whole circuit with refrigerant.
Install fan/filter parts to RX/HC and connect electrical quick
connectors, see the separate installation instruction for
GOLD.
GB.RXHCF.191011
Centre section
Outer section
Centre section
with compressor
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