Service & Maintenance - J&E Hall V3 FUSION Technical Manual

Service & Maintenance
Disconnect the mains electrical supply
before servicing or opening the unit.
The condensing units are designed to give long life
operation with minimum maintenance. However, they should
be routinely checked, and the following service schedule is
recommended under normal circumstances:
The removal of the top, side and front panels ensures that
all parts are accessible.
1. Compressor – Inspect at regular intervals
•
Check for refrigerant leaks on all joints and fittings.
•
Check mountings for tightness and wear.
•
Check operation of crankcase heater.
•
Check electrical connections.
•
Ensure that no abnormal noise or vibration is detected
during test run.
•
Check the compressor oil levels and top up if
required. The oil level should be ½ to ¾ way up the
sight glass (where fitted).
2. Condenser Fan Motor & Blade – Clean and inspect at
regular intervals
•
Check for abnormal noise, vibration, and fan
imbalance.
•
Ensure that the fan motor is clean and spins freely.
•
Check that the condenser fan blade is clean and free
from restriction and damage/imbalance.
•
Note: The fan motor is pre-lubricated, and factory
sealed so no maintenance is necessary.
3. Microchannel Condenser Coil – Clean and inspect at
regular intervals.
•
Remove surface dirt, leaves etc. with a vacuum
cleaner (preferably with a brush or other soft
attachment rather than a metal tube), compressed air
blown from the inside out, and/or a soft bristle (not
wire!) brush. Do not impact or scrape the coil with the
vacuum tube, air nozzle, etc.
•
Do not use any chemicals (including those advertised
as coil cleaners) to wash micro channel heat
exchangers. They can cause corrosion. Rinse only.
Hose the MCHE off gently, preferably from the inside
out and top to bottom, running the water through
every fin passage until it comes out clean. Micro
channels fins are stronger than traditional tube & fin
coil fins but still need to be handled with care. Do not
bang the hose into the coil. We recommend putting
your thumb over the end of the hose rather than using
a nozzle end because the resulting spray is gentler
and the possibility for impact damage is less.
•
Micro channel heat exchangers, because of their fin
geometry, tend to retain water more than traditional
fin & tube coils. Depending on the specific design and
installation of your coil, it may be beneficial to blow
or vacuum out the rinse water from your unit to speed
drying and prevent pooling.
4. Compact Brazed Heat Exchanger (BPHE)
** For EVI Units ONLY
•
Any soldering process done on the heat exchanger
needs to be brazed with a minimum of 45% silver
solder at maximum 450°C (840°F) when soft
Issue: 01.06.2023
soldering and 450-800°C (840-1470°F) when hard
soldering.
•
Do not direct flame at BPHE and use wet rag to avoid
overheating of BPHE.
5. Controls
•
Check settings and operation of pressure switches.
•
Check overload setting.
•
Check fan speed control setting and operation.
6. Power Supply – Inspect at regular intervals.
•
Check the running current and voltage for the
condensing unit.
•
Check the electrical wiring and tighten the wires onto
the terminal blocks if necessary.
7. Refrigerant Charge
•
Check the refrigerant charge by ensuring that the
system is operating correctly, the pressures are as
expected and that the liquid line sight glass shows a
full bore of liquid refrigerant.
•
Carry out a full leak test.
8. Compressor replacement (rotalock connections)
•
The rotalock connections used on some compressor
models are factory sealed with Loctite 554 thread
sealant. If the rotalock connections need to be
disassembled (e.g., compressor change), then they
should be thoroughly cleaned and Loctite 554
reapplied before reassembly. In case of difficulty
undoing the connections due to the sealant, apply
heat to the rotalock using a heat gun for several
minutes and then loosen using hand tools whilst hot.
Replacement of the 'O' ring seal may be required.
Please see Table 13 for the recommended torque
tightening values.
9. Unit decommissioning and disposal
•
At the end of the unit's useful life, a suitably qualified
engineer should decommission it. The refrigerant and
compressor oil are classed as hazardous waste and as
such must be reclaimed and disposed of in the correct
manner, including completion of waste transfer
paperwork. The unit components must be disposed of
or recycled as appropriate in the correct manner.
10. Warranty
•
The warranty as provided by J & E Hall on its
products is subject to correct application, siting, and
installation procedures together with subsequent
recorded maintenance/servicing carried out in
accordance with our recommendations. Failure to do
so could result in the withdrawal of our warranty.
Please go to our website for our detailed warranty terms
www.jehall.co.uk
and conditions:
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