50
13.4 - Tightening torques for the main electrical
connections
13.4.1 - Tightening torques for the main electrical connections
Component
Designation
in the unit
Value
(N·m)
Screw on bus bar, customer connection
M8
-
18
M10
L1/L2/L3
30
Soldered screw PE, customer connection (M12)
PE
70
Tunnel terminal screw, compressor contactor
Contactor 3RT103_
Contactor 3RT104_
5
Contactor 3RT105_
11
Contactor 3RT106_
KM_
21
Nut on compressor contactor deck
M8 for contactors 3RT105_
18
M10 for contactors 3RT10_7
KM_
30
Tunnel terminal screw, current transformer
Size 2 (3RB2956_)
11
Size 3 (3RB2966_)
TI_
21
Nut on current transformer deck
M8
18
M10
TI_
30
Compressor earth terminal in the power wiring control box
Terminal M8
Gnd
30
Compressor phase connection terminals
M12
25
M16
EC_
30
Compressor earth connection
Gnd on EC_
25
Tunnel terminal screw, disconnects 3RV1011_
QF_/QM_
1
Tunnel terminal screw, hydronic pump contactor
Contactor 3RT101_
KM90_
1
Contactor 3RT102_
2.2
ATTENTION: The tightening of the connections at the
compressor terminals requires special precautions. Please
refer to the chapter below.
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
Used for
Value
(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
Hydronic 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
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 fin (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.
Summary of Contents for Aquaforce 30XA Series
Page 55: ......
