Carrier AquaSnap Touch Pilot Junior Series - Field Control Wiring; Power Supply

33
11.5 - Field control wiring
IMPORTANT: Field connection of interface circuits may lead
to safety risks: any control box modication must maintain
equipment conformity with local regulations. Precautions
must be taken to prevent accidental electrical contact between
circuits supplied by different sources:
• The routing selection and/or conductor insulation
characteristics must ensure dual electric insulation.
• In case of accidental disconnection, conductor xing
between different conductors and/or in the control box
prevents any contact between the conductor ends and
an active energised part.
Refer to the 30RB/30RQ Touch Pilot Junior control manual and
the certied wiring diagram supplied with the unit for the eld
control wiring of the following features:
• Water heat exchanger pump interlock (mandatory)
• Remote on/off switch
• Demand limit external switch
• Remote dual set point
• Alarm, alert and operation report
• Heating/cooling selection
11.6 - Power supply
ATTENTION: After the unit has been commissioned, the power
supply must only be disconnected for quick maintenance
operations (one day maximum). For longer maintenance
operations or when the unit is taken out of service and stored
(e.g.duringthewinteroriftheunitdoesnotneedtogenerate
cooling) the power supply must be main-tained to ensure
supplytotheheaters(compressoroilcrankcaseheaters,unit
frost protection).
After all possible options have been connected, the trans-former
ensures the availability of a usable 24 VA or 1 A power reserve for
the control circuit on site.
11 - ELECTRICAL CONNECTION