GB.COOLDX.INST.090301
We reserve the right to alter specifications.
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5
COMMISSIONING
5.1 Preparations
5.1.1 Before initial start up
• The power supply must be connected.
• The communication cable to the GOLD air handling
unit should be connected to one of the connections
marked Internal EIA-485.
• Check that all fuses and protective motor switches are
on.
The control system of the GOLD has a pre-programmed factory
setting, which makes the cooling unit ready to use after basic
settings have been entered. The CoolDX function should be
activated. See the Operation and Maintenance Instructions for
the GOLD dealing with managing the menus in the hand-held
micro terminal.
5.1.2 Starting up
• Set the safety isolating switch of the cooling unit to
position ON.
• Check that light-emitting diode L2 on the IQnomic
Plus module steadily shines (24 V supply), and that
light-emitting diode L1 is flashing (communication).
The function selector switch should be in position 6.
• Check in the hand-held micro terminal of the GOLD
unit that Auto Operation has been selected as the air
handling unit’s cooling function (under Operation
Mode), and that CoolDX Economy or CoolDX Comfort
has been selected under Cooling Regulation.
• Go to the Manual Test Menu in the hand-held micro
terminal of the GOLD unit. See the Operation and
Maintenance Instructions for the GOLD unit.
Navigate to IQnomic Plus and CoolDX.
• Check: Start one compressor at a time. If any
compressor doesn’t start, an alarm will be initiated.
For the size 60, capacity variants 2 and 3, CoolDX
units, the rotation direction of compressor no. 2 is
important. See Section 5.1.4 Phase sequence monitor.
• Set the compressors to 0 (stop).
• Go back to the main menu.
• CoolDX is now ready for operation and will start when
there is a cooling load.
5.1.3 In-service pressure switches
The CoolDX has two in-service pressure switches in each cooling
circuit, one for low pressure and one for high pressure.
If the operating pressure, in any of the circuits, exceeds or drops
below a limit value, the relevant compressor is switched off. The
text CoolDX PRESSURE LIMITING is displayed in the hand-held
terminal until the pressure comes within the limit values again.
The compressor is permitted to restart when the restart delay has
expired.
5.1.4 Phase-sequence monitor
The size 60 CoolDX, capacity variants 2 and 3, are equipped with
a phase sequence monitor for compressor 2.
The phase sequence monitor for capacity variant 2 is installed in
the electrical equipment cubicle, see illustration.
The phase sequence monitor for capacity variant 3 is integrated
with the compressor and is installed in its connection box. It lacks
visible indication LEDs.
Alarm 86, CoolDX K2 tripped, is displayed in the hand-held mi-
cro terminal of the GOLD unit. In the event that Alarm 86 trips,
this may be due to several causes: incorrect phase sequence,
tripped protective motor switch, tripped high pressure switch
(BP2-2) or the absence of control voltage.
5.1.5 Remedial action if wrong phase sequence
Warning
May only be carried out by an authorised electrician or
trained service personnel.
• Stop the CoolDX by selecting SHUT OFF in the menu SETTINGS.
• Set the safety switch to position OFF on the CoolDX.
• Isolate the power supply to the CoolDX.
Important
Check that the incoming power supply to the CoolDX is
isolated by measuring.
• Transpose the two phase wires on the incoming power
supply cable in order to obtain correct phase sequence
(direction of rotation).
• Reconnect on power supply to the CoolDX.
• Set the safety isolating switch to the ON position.
• Start the CoolDX as described in Section 5.1.2 Starting up.
6
ALARMS
For a description of the alarms, see the Operation and Mainte-
nance Instructions for the GOLD.
Electrical equipment in the CoolDX
1
12
34
567
8 9
0
P1
L1
L2
6
3
2
4 5
7
12
9
8
10 11
13
18
15
14
16 17
19
24
21
20
22 23
Rsf 077 CAREL
ok
alarm
Applicable to size 60, capacity variant 2 only:
When LED 1 is lit, there are at least two phases.
When LED 2 is lit, the phase sequence is correct..
1
2