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WARNING: Turn o 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.
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
[-1
°
] in order to maintain system balance and
obtain improved capacity. Low ambient control
should be used on all equipment operated below
70
°
[21
°
C} ambient.
Hard Start Components
Start components are not usually required with
the scroll compressors used in RA17 condensing
units, but are available for special cases and
where start components are desirable to reduce
light dimming. Also, see the interconnecting tubing
section of this manual to see if the application
requires start components.
Accessories
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