York VCH-20A, Руководство пользователя

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1.1 General description of the unit
The VCH/VIR series models are reversible air-air units with centrifugal fans in the indoor unit and in the
outdoor unit.
The VCH unit includes a compressor, condenser, centrifugal fan, controls and DPC-1 thermostat. The
VIR indoor units include an evaporator coil, air filter and centrifugal fan.
The standard form of supply can be easily modified on site where required to give a compact unit.
The unit can be installed outdoor or indoors, as it is protected against outdoor environments and the fans
are centrifugal, which accept ducts.
It is supplied fully fitted and factory-tested.
It is designed to provide significant energy savings and to give a long working life.
The start-up and automatic temperature setting involve the 24 volt ambient thermostat.
1.1.1 Technical specifications
Compressor
Of the hermetic, vertical type, mounted on antivibratory fixtures, especially designed for heat pump units
with large mechanical components and low consumption motors.
• The VCH 20A, 25A, 30A and 40A units have just one compressor.
• The VCH 45A, 60A, 75A and 90A units have two compressors with 2 independent circuits.
They are supplied filled with POE oil to prevent the formation of foam and resistant to oil heating.
Compressor heater
Keeps the sump oil warm for easier start-up and to prevent oil from being released from the compressor.
Suction accumulator
Connected to the compressor suction pipe, this protects it from hammering by liquid.
Coils
These are large and made of copper tubes and aluminium fins. They are located inside the unit, fully
protected against knocks during transportation or during installation. It can be supplied with "Blue Fin"
or copper fins as optional.
Indoor fan (VIR 25A)
A centrifugal fan driven by an independent motor and belt transmission is fitted.
Indoor (VIR 40A, 45A, 60A, 75A and 90A) and outdoor (VCH 20A, 25A, 30A and 40A) fan.
Two centrifugal fans are fitted with a joint shaft and belt transmission, driven by one motor and connected
to a single plenum.
Outdoor Units (VCH 45A, 60A, 75A and 90A)
Two independent centrifugal fans are fitted, each driven by an independent motor and connected to a
single plenum.
The motor transmission to the fan involves belts. These fans have enough available pressure for the
installation of ducts and optional accessories.
Cooling circuit
Made of welded copper pipes and includes access connections on the high and low-pressure sides. It
is fitted with shut off valves on the suction side that are used in the factory to protect the compressor
during the 45 bar pressure test that all units must pass.
1 User manual
1.1 General description of the unit
2