64 EN/39B/06.2018 © STULZ SpA – all rights reserved
SAL
External part:
• Heating resistance on electrical box;
• Condenser shut system with flow control valves;
• Crankcase heater.
Protections of the winter kit:
• Heater of the compressor carter: it envelops the lower part of the compressor, where the oil goes
when the compressor is not in operation. It maintains the refrigerant quantity, in solution with oil, at
a level low enough to guarantee the proper oil viscosity. The heater is always active when the unit
is powered and the compressor is off.
INFORMATION
It's possible to install Winter kit option only in the units with refrigerant R407C.
Refrigerant circuit with winter kit option.
11.4. Main switches - SWTS/SWMS
A main switch is located on the electrical box of the evaporating unit and another one on the
electrical box of the condensing unit. They are used to disconnect main power supply to the unit.
When switched off, they interrupt power supply to the unit circuits from it downstream. These
switches can be provided by the installer as well, or it can be requested ordering this option. SWTS
is the version for 3-phase main power supply, SWMS is the version for single-phase main power
supply. Main switches don't disconnect DC voltage, if present.
Outside unit Inside unit
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