York VCH 20A User Manual page 5

Refrigerant
The VCH and VIR units are supplied with pre-connections for welding. The refrigerant must be charged
entirely on site. See refrigerant charges in the physical data table. The refrigerant used is R-410A.
Electrical panel
Accessible directly from outside by 1/4-turn locks.
Includes:
• Connection strip.
• Guards.
• Electronic board and probes.
• Power contactors
• Switching relay.
• Phase control relay.
• Transformer.
It meets current European regulations. Protection rating, IP44.
Phase control relay or phase sequence and fault probe relay
The electrical board in the unit includes a phase sequence and fault probe that detects any phase
sequence different to R-S-T or detects that one of the phases is faults once the unit has been started
and disconnects the power to the main board of the unit through an internal voltage-free contact, leaving
it at a standstill.
C A U T I O N
Where the phase sequence is correct and the centrifugal fan of the indoor unit (VIR) rotates the correct
way, exchange two phases at the bottom of the fan contactor.
Dryer filter
Connected to the cooling circuit to protect the components from humidity and particles carried by the
refrigerant.
Construction and rust protection features
All metal parts of the structure are made of galvanised aluminium steel plate.
The outdoor parts are treated with oven-polymerised polyester paint (RAL9002), guaranteeing a quality
finish that lasts for many years (800 H.N.S. according to DIN 50021).
Indoor heating resistors (optional)
Exposed cord-type for fast heat dissipation, avoiding temperature inertia that could affect the
components.
Unit base
The base of the unit is made with fixed beams that provide a solid foundation. Openings on the front of
these beams can be used to attach a crane for hoisting the unit into position during the installation
process.
The beams also have openings on the bottom to place the unit on dampers, if required.
Service connections
For easier electricity connections with a minimal amount of work, electrical and control cables can be
pulled through accessible areas of the unit.
User manual
General description of the unit
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1.1
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