references
Split refrigeration units and heat pumps
AIRDUO SK/CK - SK/CP
ELECTRICAL
CONNECTIONS
Outdoor unit SK
Indoor unit CK
Mixing box (optional)
4 Indoor fan power supply 5 Indoor fan thermal protection 6 Outlet T probe 1 2 pGD1 maintenance terminal (opt.) 31 Remote on/off (opt.) 32 Main failure signal (opt.) 33
TCO user terminal Power supply
7 Return or ambient T probe (opt.) 11 Clogged filter detector (opt.) 12 Air flow control (opt.) 13 Without neutral (std) and/or starter(opt.) 14 HWC 24Vac signal (opt.) 15 HWC valve (opt.) 16 Electrical heaters (opt.) 17 Electrical heaters safety (opt.) 7 Return or ambient T probe (opt.) 21 Mixing T probe (opt.) 22 Mixing box servomotors (opt.) 23 Return fan power supply (opt.) 24 Return fan thermal protection (opt.)
No 1 2 4 5 6 7 11 12 13 14 15 16 17 21 22 23 24 31 32 33 Power supply
SK 400 III (±10%)
90
100 120 160 180 182 200 240 320 360 420 485 540 600
3 + GND
TCO user terminal connection Indoor fan power supply Thermal relay signal of the indoor fan Outlet temperature probe Return or ambient temperature probe (optional)
2 wires for power supply 230V + 1 shielded cable for communication type AGW20 / 22 (1 braided pair + drainwire + shielding) 3 + GND 2 wires 2 wires 2 wires 2 wires 2 wires
Unit without neutral (std) and/or soft starter (opt.) HWC 24 Vac signal (optional) HWC valve (optional) Electrical heaters (optional) Safety thermistors of electrical heaters (optional) Mixing temperature probe (optional) Mixing box servomotors power supply (optional) Return fan power supply (optional) Thermal relay signal of the return fan (optional) pGD1 maintenace terminal connection (optional) Remote on/off (optional) Main failure signal (optional)
1 wire 2 wires 1 wire 3 wires (per stage) + GND 2 wires 2 wires 3 wires 3 + GND 2 wires telephone cable 6 wires standard (RJ12 connector) 2 wires 2 wires
If the unit is going to be installed in an industrial environment with a high level of electromagnetic interference, it is recommended to shield the cables of the thermostat control. In indoor units with the optional mixing box, these connections are realized directly between the outdoor unit and the terminal board of the box mentioned The power supply for the electrical heater must be protected by an automatic switch and/or fuses to be foreseen by the installer.
572
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 17.01 A