Safety And Equipment Protection Systems; Placing The Unit Out Of Service For A Planned Stoppage Or Breakdown; Placing The Unit Out Of Service For A Planned Stoppage; Placing The Unit Out Of Service For Seasonal Stoppage - York VCH 20A User Manual

1 User manual
1.6

Safety and equipment protection systems

1.6 Safety and equipment protection systems
The VCH/VIR range of air conditioning units includes an entire series of safety and protection systems
intended to provide a high degree of safety for users and maintenance personnel.
Those not expressly authorised to use the air conditioning unit must not handle it or perform repair or
maintenance work.
Safety systems
Johnson Controls Inc. manufactures air conditioning units in accordance with EU occupational protection
and user safety regulations, provided that the units are used and maintained in line with the instructions
and indications given in this document.
Given that the air conditioning unit is installed on the roof of a building or property, users must under no
circumstances inspect or adjust the unit themselves. All of inspections or adjustments that may be made
by the user are performed using the DPC-1 thermostat.
The air conditioning unit is fitted with electrical protection systems to protect personnel responsible for
its regular maintenance and upkeep.
As established by applicable electricity regulations, the electrical system is fitted with electricity surge
and current leakage protection system consisting of differential circuit breakers and thermal magnetic
switches (not supplied by the manufacturer, must be installed on site).
Under no circumstances is the user of the air conditioning unit exposed to live parts.
Likewise, access to moving parts by unauthorised persons is prevented. This involves placing
appropriate safety locks on all of the removable covers on the unit.
Unit protection systems
The refrigerant circuit of the unit is protected against excessively high or low pressure and discharge
temperature. It is also protected against repeated cold start-ups caused by the compressor suction probe
when the summer cycle is activated.
1.7 Placing the unit out of service for a planned stoppage or
breakdown.

1.7.1 Placing the unit out of service for a planned stoppage.

To stop the air conditioning unit with the DPC-1
thermostat, press the MODE button -1- on the
thermostat repeatedly until OFF-2- is displayed on the
screen.

1.7.2 Placing the unit out of service for seasonal stoppage

The power supply to the unit must be disconnected when placing the air conditioning unit out of service
for long periods of time (seasonal stoppage).
To do so, the differential circuit breaker and thermal magnetic switch on the unit power supply must be
disconnected.
10
2
OFF
ºC
3
PROG MODE
1