NuAire BPS HP-CO Series Service Manual

1.0 SAFETY PRECAUTIONS
Before servicing or carrying out repairs to the unit, make sure
you read all the "Safety precautions".
1.1 Hazard Symbols
Warning: Describes precautions that should be observed
to prevent danger of injury or death to the user.
Caution: Describes precautions that should be observed
to prevent damage to the unit.
1.2 Important Information
Warning:
•Carefully read the labels affixed to the main unit.
•Only a trained and qualified technician should carry out
repair and service work on this unit.
•EN378-4 specifies that anyone working on flammable
refrigerants systems should receive training which includes
the following:
*Knowledge of legislation, regulation and standards
relating to flammable refrigerants;
*Detailed knowledge of and skill in handling flammable
refrigerants, personal protective equipment, refrigerant
leakage prevention, handling of cylinders, charging,
leak detection, recovery and disposal.
•Improper service or repair by the user /other may result in,
electric shock, fire, explosion or water leakage.
•Any copper tube used to replace refrigerant piping shall
be seamless copper tube of Type ACR (hard or annealed)
complying with sound engineering practice of PED/PE(S)R.
•Use the specified cables for wiring. Make the connections
securely so that any outside forces acting on the cables are
not applied to the terminals. Inadequate connection and
fastening may generate heat and cause a fire.
•Never repair the unit with unspecified parts always use
approved Nuaire parts. If the unit is repaired improperly,
electric shock, explosion or fire may result.
•When handling this product, always wear protective
equipment e.g. Gloves, full arm protection namely boiler suit,
and safety glasses. Improper handling may result in injury.
•If the pressure switch, thermal switch, or other protection
device is shorted or operated forcibly, or parts other than
those specified by Nuaire are used, fire or explosion may
result.
1.2.1 Tools & Equipment
Warning:
•Tools should be rated for use in a Zone 2 area or have been
suitably tested for use with flammable refrigerants. Type 'n'
protection according to EN60079-15 is deemed as suitable
for this application. This is not intrinsic safety.
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
BPS HP-CO
Boxer Packaged Solution
with Heat Pump
Service Manual
•A flammable gas detector should be used to monitor the air
in the work area. If an electronic leak detector is used it must
be safe and sensitive to the flammable refrigerant.
•Refrigerant recovery machines must be assessed for use
with flammable refrigerants. Approval must be sought from
the manufacturer before using a standard HFC recovery
machine with any flammable refrigerant.
•More accurate scales are necessary when charging small,
critical charged systems with some flammable refrigerants
An accuracy of ±5 g is often necessary.
•A dry powder or CO2 fire extinguisher must be available at
the location.
•A suitable ventilation fan should be used when working
inside if there is insufficient natural ventilation. Procedures
The work area must be well ventilated with no source of
ignition within 3 m of the system and the service equipment
such as a vacuum pump and recovery machine.
•The vacuum pump should be controlled by a switch outside
the 3m zone (the vacuum pump's switch should not be
used as it is a source of ignition) and the pump should
be located in a well-ventilated area. Prior to un brazing
joints the flammable refrigerant must be removed from the
system, and the system filled with nitrogen. Faulty electrical
devices and compressors must be replaced with like for like
components.
•To dispose of this product, consult your dealer. Do not use a
leak detection additive.
1.2.2 Before Service
Caution:
•Do not install the unit where combustible gas may leak and
keep away from any fire source.
•If the gas leaks and accumulates around the unit, an
explosion may result.
•Ground the unit. Do not connect the ground wire to gas
or water pipes, lightning rods, or telephone ground lines.
Improper grounding may result in electric shock.
•Install the power cable so that tension is not applied to the
cable. Tension may cause the cable to break and generate
heat which may, in turn, cause fire.
•Install a leak circuit breaker, as required. If a leak circuit
breaker is not installed, electric shock may result.
•Use power line cables of sufficient current carrying capacity
and rating. Cables that are too small may leak, generate
heat, and cause a fire.
•Use only a circuit breaker and fuse of the specified capacity.
A fuse or circuit breaker of a larger capacity or a steel or
copper wire may result in a general unit failure or fire.
•Be very careful regarding product transportation. Two
people should be used to carry products of 20kg or more.
22. 05. 23. Document Number 672055
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