Table of Contents
Advertisement
6.4 - RS 485 COMMUNICATION INTERFACE (MODBUS protocol)
• Code 70250056.
• After removing the side panel, also remove the front panel A (remove the three retaining
GB
screws B and pull the panel downwards).
• Secure the communication interface C on the left-hand side of the electric panel.
• Connect the cable (supplied) between the communication interface C and the controller D.
• Connect the module's 230 VAC power supply in the following manner with the black and
blue wires delivered with the accessory.
• Connection
communication bus and
protocol details: refer to the
corresponding
file.
7 - STARTING
Before carrying out any work on the installation, make sure that it is switched off and that access to it is prevented.
Any work must be carried out by personnel qualified and authorised to work on this type of machine.
7.1 - CHECK
• That hydraulic connections are properly tight and that the hydraulic circuit functions correctly:
- purge of circuits,
- position of valves,
- hydraulic pressure (1.5 to 3 bar).
• That there are no leaks.
• That the machine is stable.
• That the power cables are well fixed to their connection terminals. Terminals that are poorly tightened may cause
overheating and malfunctions.
• That the electric cables are well insulated from any sections of sheet metal or metal parts which could damage them.
• That probe, control and power cables are properly separated.
• That the machine is earthed.
• That there are neither tools nor other foreign objects in the units.
7.2 - STARTING-UP THE UNIT
• Power up the unit.
• Turn the water on.
• Start the appliance (see paragraph 5).
CAUTION:
On three-phase units, make sure that the phase rotation order is correct. If the rotation order is not respected, the
compressor will turn backwards (and make an abnormal noise). To fix this, simply invert the 2 phases.
7.3 - CHECKS TO BE MADE
• Water flow-rate.
• The generator is equipped with 1/4 SAE pressure taps at the circulator inlet and outlet, to enable the pressure drop to be
measured using a hydraulic pressure gauge. Use the circulator curves in paragraph 10 to find the water flow rate.
Note:
The generator's water output must be ensured at all times (particular attention should be paid in the case of control of the
terminal units on 2-way valve).
• Hydraulic circuit pressures.
• Cooling circuit pressures.
• Control system operation.
IMPORTANT:
If antifreeze is added (monopropylene glycol), a minium rate of 15% to 20% is needed to avoid any risk of corrosion.
• The LP pressure switch cuts at 0.5 bar.
• The HP pressure switch cuts at 42 bar.
Interface C
of
the
technical
Filter E
Blue (N2)
3
4
Existing wires to
Black (U2)
disconnect from the
1
2
filter and to connect to
the wires of the
accessory
Wiring board
N2
U2
IMPORTANT NOTE
14
A
B
B
B
C
E
D
Advertisement
Table of Contents
