COSTAN TECHNICAL DOCUMENTATION
REVISION STATUS
TRUE COPY
PAGE 12 OF 18
PRODUCT:
EPTAGLOO
ORD
DATE
CHANGE ORDER
OF THE SIGNED
DATE OF 1st ISSUE
A
18.Dec.2008
UPDATE
ORIGINAL
13/June/07
DOC. no. QSM0000406A
CHAP. No.:
040
B
28.July.2009
UPDATE
C
CHAPTER:
INSTALLATION
C
23.Feb.2010
RANGE
EXTENSION
D
11.Nov..2010
SAFETY VALVE ADDED
ISSUED BY MKT
may have loosened them. Check the wiring of the electrical panel and make sure that the cable
sheaths do not touch the refrigerant pipes or the compressor. Also ensure that no component
undergoes wear due to friction.
Refrigerating connection
The equipment is supplied including;
•
set of filtering elements (cartridges)
•
pressurized dry-air in the refrigerating circuit.
The pipework for connection to the system are located at the rear of the equipment. When
delivered, the discharge pipe leading to the condenser is blocked; all other valves leading to the
open are closed. Take off the copper disks, open the taps and scavenge the pressurized air before
connecting the unit up to the system. Use a stiff annealed copper pipe suitable for refrigeration
systems.
Certain basic rules have to be followed when setting up R404A systems. Brazing must be done in
nitrogen gas atmosphere to prevent the formation of system-damaging residue. It is most
important that the fitter keep to the following instructions:
•
Use nitrogen gas suitable for refrigeration purposes, which is marked "R".
•
Connect one end of the pipe to be brazed to the nitrogen tank using a pressure-reducing valve.
To adjust the pressure correctly, remember that the flow of nitrogen must be only just perceived
by the palm of the hand. Braze as usual.
Place BOA flexible vibration absorbers between the equipment and the system’s fixed pipes;
install shutoff valves on the discharge and condenser return lines, on the liquid line and on the
suction line, referring to the connection diagrams contained in the equipment’s technical literature
and to the instructions in the Use and Maintenance Instructions for refrigerating systems
QSM000446A_ (for systems serviced by Epta).
Fit one pressure gauge connection (Schrader valve) on the suction stretch and one on the liquid
line for evacuating (vacuum) operations and for the leak test.
Introduce an initial amount of oil into the oil reserve through the filling connection 1/4”SAE
located on the inlet valve (shut the valve beforehand) until the oil level reaches the upper viewer.
The approximate amount to be let in ranges from 6 to 16 liters, depending on the reservoir model
installed (HCYR 80, HCYR 120 or HCYR 200). Then open the valve. When located externally,
safety valves (pressure relief valves) must be suitably protected from getting soiled and affected
by the elements;
The position of outdoor-leading relief pipework branching off from the safety valves must ensure
that no obstruction hazard exists and must avoid any personal or property damage when the
refrigerant is released. Complete suction line insulation.
The equipment termed "refrigerating unit" cannot work on its own and must be included in the set
termed "system”. When inoperative and not connected up to a system, some pack versions contain
pressure vessels, that, due to a possible refrigerant accumulation, may entail a potential hazard in
case of fire. Such vessels, named liquid receivers, are duly protected by safety valves ensuring
refrigerant discharge.
If the pack is delivered without an on-board liquid receiver, it is the installer's responsibility
to fit the receiver with suitable safety valves providing for refrigerant discharge at the time
when the pack is connected up to the other system components, i.e. to pressure vessels that
may be subject to a pressure rise in case of fire.
Neither the unit nor the system include vessels containing an independent source of heat.
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