29
WARNING:
Turn off electric power
at the fuse box or service panel before making
any electrical connections� Also, the ground
connection must be completed before making line
voltage connections� Failure to do so can result in
electrical shock, severe personal injury, or death�
CAUTION:
SINGLE POLE COMPRESSOR
CONTACTOR (CC):
Single pole contactors are used on all single-
phase units up through 5 tons� Caution must be
exercised when servicing as only one leg of the
power supply is broken with the contactor�
Time Delay Control
(Part No. RXMD-B01)
The time delay control is in the low voltage control
circuit� When the compressor shuts off due to a
power failure or thermostat operation, this control
keeps it off at least 5 minutes which allows the
system pressure to equalize, thus not damaging
the compressor or blowing fuses on start-up�
Low Ambient Control (LAC)
(Part No. RXAD-A08)
This component senses compressor head
pressure and shuts the heat pump fan off when
the head pressure drops to approximately 250
PSIG� This allows the unit to build a sufficient head
pressure at lower outdoor ambient (down to 0°F
[-18°C]) in order to maintain system balance and
obtain improved capacity� Low ambient control
should be used on all equipment operated below
70°F [21°C} ambient�
ACCESSORIES
Hard Start Components
Start components are not usually required with
the scroll compressors used in RA14 condensing
units, but are available for special cases and
where start components are desirable to reduce
light dimming�
Accessories
Summary of Contents for RA1418AJ1NA
Page 39: ...39 For Single Phase Models WIRING DIAGRAMS Wiring Diagrams...
Page 40: ...40 WIRING DIAGRAMS For Three Phase Models Wiring Diagrams...
Page 41: ...41 NOTES...
Page 42: ...42 NOTES...
Page 43: ...43 NOTES...
Page 44: ...44...
