J&M CellarPlus 70-S1/S3, Техническое руководство

Страница: 12 / 32

Issue: 01.06.2023 Page 9
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Connect a vacuum pump and vacuum gauge to the
system.
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Ensure all gauge manifold and service valves are in an
open position.
•
Evacuate the system until vacuum is below 250 microns
(0.25 torr).
Note: A triple evacuation procedure is recommended for
all new systems or where moisture is suspected.
•
Once the system is isolated and the vacuum pump is
switched off, any rise in pressure indicates that either
there may be a leak in the system or moisture is still
present. In this case, recheck the system for leaks, repair
as necessary, and then repeat the evacuation
procedure.
•
Once evacuation is completed satisfactorily, the vacuum
pump and vacuum gauge can be removed. At this point,
the refrigerant charge can be added to the system as
required. Refrigerant R448A and R449A must be
charged in liquid form to avoid change of chemical
properties.
•
Ensure an adequate liquid charge (4~5barg) has been
introduced to the high side of the system before
starting the compressor.
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The remaining charge is slowly throttled into suction
side until the installation has reached a level of stable
nominal condition during operation.
Charging liquid
into the suction side of the system should ONLY be
done with a metering device.
Ensure a minimum
operating pressure 0.5barg is maintained when
adding refrigerant to the suction side, otherwise
overheating of the compressor may occur. Use
calibrated weighing scales to record the amount of
refrigerant added to the system.
•
Stop the filling once obtain sufficient suction superheat
and liquid subcooling, remove the cylinder from circuit.
Refrigerant charge by judging the liquid sight
glass does not guarantee as 100% correct
way.
Drainage
The evaporator drain pan fitting is supplied
loose and must be fitted on site.
Correct fitting is vital to ensure leak
– free operation. The
lock nut and the aluminium washer on the drain fitting MUST
be fitted the right way around; otherwise, it will not tighten
against the drip tray. One side of the nut has an angled
recess
– this must be facing towards the drip tray. The fitting
does not require any sealant, but a small amount of silicon
sealant can be applied between the flared face of the fitting
and the drip tray if so desired.
The accessories bag is tied to the indoor unit’s fan guard and
consists of:
•
instruction manual,
•
1pcs aluminum alloy drain fitting 1 ” -14UNF male
thread,
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1pcs hexagon locknut and
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1pcs aluminium washer
To install the drain fitting, firstly unscrew the drain pan from
the indoor unit. Locate the drain fitting into drain pan, insert
washer and followed with locknut to secure the drain fitting
to the drain pan. Then refit the drain pan to the unit. Follow
Figure 13 to install the drain fitting in the correct way.
Figure 13: Drain Fitting Assembly
The locknut only requires hand tightening and then pinching
up with a spanner. Do not over tighten, else the threads may
strip from the nut and damage the tray.
Recommended minimum drainpipe diameter is 25mm or 1
”.
The drainpipe material could be either copper or plastic. It
is not recommended to use flexible hose as it tends to kink
easily which might cause blockage and water to back up in
the unit.
Electrical
The mains electrical supply to the outdoor unit
must be via a suitable motor rated circuit
breaker or fuse. A mains isolator is NOT fitted
to all units. Therefore, an additional isolator is
required.
3phase condensing unit comes with scroll
compressor: live wires need correctly
terminated at terminal block for the
compressor to rotate in correct direction
(compression).
The rocker switch on the front of the indoor units is for
isolating power to the indoor fan and electronic controller
only.
J & E Hall cellar systems require a 230V/1/50 supply to the
indoor units and either a 230V/1/50 or a 400V/3/50
supply to the outdoor unit (depending on outdoor unit model
chosen). They are not suitable for any other supply voltages
(other than a deviation of +/- 10% of the above values) and
are not suitable for 60 Hz supplies.
•
Refer Table 4: Electrical Data and Requirements , to size
the power supply cable. Cable types need to be
selected to suit the application and the electrical
installation should conform to the current local
standards.
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Cables to the indoor units should be routed through the
‘U’ shaped cut -out in the bottom of the removable air
grille at the side of the units and into the rear of the
electric box.
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Cables to the outdoor unit should be routed through the
cable glands on the rear of the unit.
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Connect the mains supplies as per the wiring diagrams.