Carrier AquaForce 30XB series - Tightening Torques for the Main Bolts and Screws; Condenser Coil

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13.4.2 - Connection precautions for 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 ist 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 bolts and screws
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 xing 18
Taptite screw M10 Condensing module, chassis - structure xing,
control box xings, compressor xings, oil
separator xing
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 ange 40
Screw H M16 Oil separator anges, suction anges 110
Screw H M16 Heat exchanger water boxes 190
Screw H M20 Suction anges 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 xing 30
ATTENTION: 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
13.6.1.1 - Recommendations for maintenance and cleaning
ofroundtubeplaten(RTPF)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.
Removalofbresthatobstructthesurfaces
Fibres and dirt collected on the coil surface must be removed with a
vacuum cleaner. If you do not have a vacuum cleaner, a soft brush
with non-metallic bristles can be used instead. In all cases cleaning
must be done in the direction of the ns, as the coil surface is easily
damaged. The ns bend easily and damage the protective coating
of the coil, if cleaning is done at right angles to the ns. Clean
against the air ow direction.
NOTE: Using a water jet from a spray hose on a polluted surface
will result in bres and dirt becoming trapped in the coil, making
cleaning more difcult. All bres and dirt must be removed from
the surface, before using a low-speed rinsing jet.
Periodical cleaning with clean water:
For coils installed in a coastal or industrial environment
periodical cleaning by rinsing with water is benecial. It is
however essential that rinsing is done with a low-speed water
jet to avoid damaging the ns. Monthly cleaning as described
below is recommended.
ATTENTION
- Chemical cleaning agents, water containing bleach,
acidic or basic cleaning agents must never be used
to clean the coil exterior or interior. These cleaning
agents may be difcult to rinse off and can accelerate
corrosion at the joint between tube and ns, where
two different materials come into contact.
- High-speed water from a high-pressure cleaner, spray
hose or compressed air cleaner must never be used
for coil cleaning. The force of the water or air jet will
bend the ns and increase the air-side pressure drop.
This can result in reduced performance or nuisance
shutdowns of the unit.
13.6.1.2 - 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.
ATTENTION: Do not use chemical cleaners 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.
13 - STANDARD MAINTENANCE