POWERCIAT LX ST/HE/XE
EN-
52
13.4.2 - Precautions for connecting the compressor
power terminals
These precautions must be applied during an intervention that
requires the removal of the power conductors connected to the
compressor supply terminals.
The tightening nut of terminal (6) supporting the isolator (7) must
never be loosened, as it ensures terminal tightness and
compressor leak tightness.
The tightening of phase lug (4) must apply the torque between
counter nut (5) and tightening nut (3): During this operation a
counter-torque must be applied at counter nut (5). Counter-nut
(5) must not be in contact with the tightening nut of terminal (6).
1. Torque application to tighten the lug
2. Avoid contact between the two nuts
3. Lug tightening nut
4. Flat lug
5. Counter-nut
6. Terminal tightening nut
7. Isolator
13.5 - Tightening torques for the main
fastenings
Screw type
Use
Value
(N.m)
(N·m)
Metal screw D = 4.8
Condensing module, housing supports
4,2
Screw H M8
Condensing module, compressor fixing
18
Taptite screw M10
Condensing module, chassis - structure fixing,
control box fixings, compressor fixings,
oil separator fixing
30
Taptite screw M6
Piping support, cowling
7
Screw H M8
Piping clip
12
Screw H M6
Piping clip
10
Nut H M10
Compressor chassis
30
Nut H M10
Hydraulic pump chassis
30
Screw H M8
Filter drier cover
35
Screw H M12
Economiser port flange
40
Screw H M16
Oil separator flanges, suction flanges
110
Screw H M16
Heat exchanger water boxes
190
Screw H M20
Suction flanges
190
Nut 5/8 ORFS
Oil line
65
Nut 3/8 ORFS
Oil line
26
Nut H M12/M16
Victaulic collars on suction piping
60/130
Self-locking Nut M16
Compressor fixing
30
The tightening of the connections at the compressor
terminals requires special precautions. Please refer
to the chapter below.
13.6 - Condenser coil
We recommend, that coils are inspected regularly to check the
degree of fouling. This depends on the environment where the
unit is installed, and will be worse in urban and industrial
installations and near trees that shed their leaves.
For coil cleaning, two maintenance levels are used, based on
the AFNOR X60-010 standard:
13.6.1 - Level 1
12.6.1.1 - Recommendations for maintenance and cleaning
of MCHE (microchannel) condenser coils
-
Regular cleaning of the coil surface is essential for correct unit
operation. Eliminating contamination and removal of harmful
residue will increase the operating life of the coils and the unit.
-
The maintenance and cleaning procedures below are part
of the regular maintenance and will prolong the life of the
coils.
Do not use chemical cleaning products on MCHE
condenser coils. These cleaning agents can
accelerate corrosion and damage the coils.
-
Remove foreign objects and debris attached to the coil
surface or wedged between the chassis and the supports.
-
Provide personal protection equipment including safety
glasses and/or a face mask, waterproof clothing and safety
gloves. It is recommended to wear clothing that covers the
whole body.
-
Start the high-pressure spray gun and remove any soap or
industrial cleaner from it before cleaning the condenser
coils. Only drinkable cleaning water is permitted to clean
the condenser coils.
-
Clean the condenser face by spraying the coil evenly and in
a stable manner from bottom to top, directing the water jet
at right angles to the coil. Do not exceed 6200 kPa (62 bar)
or an angle of 45° related to the coil. The diffuser must be
at least 300 mm away from the coil surface. It is essential to
control the pressure and to be careful not to damage the
fins.
Excessive water pressure can break the weld points
between the fins and the flat micro-channel heat
exchanger tubes.
13 - STANDARD MAINTENANCE
