Danfoss Optyma iCO2, Инструкция по эксплуатации, Страница: 21 / 68

Instructions
118A5495A - AN405821998738en-000102 | 21 © Danfoss | Climate Solutions | 2023.02 | LCA012A024
7 – Electrical connections
• Switch off and isolate the main power supply.
• Ensure that power supply can not be switched on during installation.
• All electrical components must be selected as per local standards and unit requirements.
• Refer to wiring diagram for electrical connections details.
• Ensure that the power supply corresponds to the unit characteristics and that the power supply is stable (nominal voltage ±10% and nominal frequency
±2,5 Hz).
• Dimension the power supply cables according to unit data for voltage and current.
• Make the power supply according to local standards and legal requirements.
• The unit is equipped with high pressure switches, which directly cut the power supply to the compressor in case of activation. Parameters for high pressure
cut outs are preset in the controller, adapted to the compressor installed in the unit.
Wiring capacity
Electrical work must be done by qualified technicians.
Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical installations in the country.
Please install an earth leakage breaker without fail
. The installation of an earth leakage breaker is compulsory in order to prevent electric
shocks or fire accidents. (Since this condensing unit employs inverter control, please use an impulse withstanding type one to prevent the
earth leakage breaker from false activation.)
Note
a) Use only copper wire.
Do not use any supply cord other than the one specified in parenthesis for each type of cord mentioned below.
• Braided cord (Cord designation 60245 IEC 51), if allowed in the relevant part 2.
• Ordinary tough rubber sheathed cord (Cord designation 60245 IEC 53)
• Flat twin tinsel cord (Cord designation 60227 IEC 41)
• Ordinary polyvinyl chloride sheathed cord (Cord designation 60227 IEC 53)
Please do not use any cord other than polychloroprene sheathed flexible cord (Cord designation 60245 IEC 57) for condensing unit use.
b) A grounding wire must be connected before connecting the power cable. Provide a grounding wire longer than the power cable.
c) Ground the unit. Do not connect the ground wire to a gas pipe, lighting rod or telephone grounding wire.
If improperly grounded, an electric shock or malfunction may result.
d) The installation of an impulse withstanding type earth leakage breaker is necessary. A failure to install an earth leakage breaker can result in an accident such as
an electric shock or fire. Do not turn on the power until the electrical work is completed. Be sure to turn off the power when servicing.
e) Please do not use a phase advance capacitor for power factor improvement under any circumstances. (It does not improve power factor, while it can cause an
anomalous overheat accident.)
f) For power supply cables, use conduits.
g) Please do not lay electronic control wires (remote controller and signal wires) and other high current cables together outside the unit. Laying them together can
result in malfunction or failure of the unit due to electric noise.
h) Power cables and signal wires must always be connected to the terminal blocks respectively and secured them with cable fastening clamps provided in the unit.
i) Clamp cables so that they may not touch the pipe, etc.
j) When cables are connected, please make sure to check no loose connection or disconnection at connecting coupling of all electrical components in the control
box and then attach the cover to control box securely. (Improper cover attachment can result in malfunction or a failure of the unit, if water penetrates into the
control box.)
k) Make sure to use circuit breakers (earth leakage breaker and circuit breaker) of proper capacity.
Use of breakers of larger capacity could result in trouble on components or fire accident.
The circuit breaker should isolate all poles under over current.
l) Install an isolator or a cut-off switch on the power supply line in accordance with the local codes and regulations. The isolator shall be locked to keep the power
supply line in OFF state in conformity with EN60204-1.
m) After maintenance service, be sure to restore all wiring, bundling wire and wiring route to their original state in order for them not to touch to the metal parts.
n) When tightening electric wires and operation circuit wires to the terminal block, tighten the screws at torques as shown in the table at right.
Screw size Tightening torque (Nm)
M4 1.0 ~ 1.3
M5 2.0 ~ 2.5
M6 4.0 ~ 5.0
M8 9.0 ~ 11.0
M10 18.0 ~ 23.0