Refrigerant Connections; Electrical Connections - CIAT condenciat CD Instruction Manual

10 - REFRIGERANT CONNECTIONS

In order to meet the operating conditions (flow rates, pressure drops), a dimensioning study must be performed.
The diameters of the pipes are not necessarily the same as those of the unit.
Once the unit is fitted into place, make the refrigerant connections between the condensation unit and the direct expansion coil.
Take care when routing the pipes. Ensure the shortest distance is used (maximum pipe length 15 metres with maximum change
in level of 6 metres). Strictly observe all the fitting instructions. Avoid allowing any contaminants to enter, and carry out all brazing
under a nitrogen purge.
Note:
- Verify the type of refrigerant before working on the refrigerating circuit.
- Only use the fluid specified on the name plate.
- Do not use oxygen or air to purge the pipes or pressurise the unit.
- Table of copper piping diameters for a maximum length of 15 m with a maximum change in level of 6 m.
Liquid sight glass
Located on the liquid line just after the dryer, the liquid sight glass is used to monitor the charge in the unit and check for moisture
in the circuit. Bubbles in the sight glass mean that the refrigerant load is insufficient or that the refrigerating circuit contains non-
condensable products.
If the sight glass indicator paper changes colour, there is moisture in the circuit.
Warning:
Some of the sight glasses may turn yellow when the machine is powered off as their sensitivity is affected by the fluid temperature.
The sight glasses should return to green after the unit has been operating for a few hours.
If the sight glass remains yellow, there is excessive moisture in the circuit. A specialist intervention is required.
CD
100
1" 3/8
Intake pipe
7/8"
Liquid pipes

11 - ELECTRICAL CONNECTIONS

● The units are designed in accordance with the requirements of European standard EN 60204-1.
● They comply with the requirements of the machinery and EMC directives.
● All wiring must be connected in accordance with the regulations that apply to the installation site (e.g. NF C 15100 in
France).
● Always refer to the wiring diagram provided with the unit.
● Follow the power supply specifications indicated on the name plate.
● The voltage must remain within the range indicated:
- Power circuit:
● 400 V (+10 %/-10 %) - 3 ph - 50 Hz + Earth (CD 90 to 700)
Make sure there is no excessive phase shift (<2%) on the supply.
If these conditions are not met, the CIAT warranty will automatically be voided. Please contact your electricity supplier.
● The cable will be carefully determined by the fitter, based on:
- The maximum nominal current (refer to the specifications on page 10)
- The distance between the unit and its power supply.
- The protection to be placed at the power source.
- The neutral operating conditions.
- The electrical connections (refer to the wiring diagram provided with the unit).
- Specifications and regulations applicable at the site.
● The electrical connections are to be made as follows:
- Connection to the power circuit
- Connection of the protective conductor to the earth terminal.
- Connect the general fault alarm potential-free (dry) contact and the automatic operation control (where applicable).
● Connection of external safety devices (compressors slaved to the air handling unit operation) and automatic control (timer
control).
● Connection of the compressor stage control (thermostat or controller, not supplied with the unit).
● Connection of the liquid electromagnetic valve (not supplied).
● The automatic operation control must be connected using a potential-free (dry) contact.
● The power circuit breakers have a standard breaking capacity of 10 KA.
● The unit's power supply is connected on the lower section, on the pipe connection side. The power cables are routed
through an opening.
NA06.130 C
1 circuit
120 150 180 200
1" 5/8
1" 1/8
240 300 350 400
2" 1/8
1" 1/8
EN - 6
2 circuits
500 540 600 700
2 x 2" 1/8
2 x 1" 1/8