S1CG/S1HG
in
le-Zone,
S2CG/S2H
Dual-Zone
•
nstallation,
eration and Maintenance Manual •
P/N 240007754, Rev. C [3/19/2010] 5 Made in the USA
Verify unit before installing (continued)
System options
Corrosion-resistant coil options (sea •
coast and harsh environment usage):
Copper n/copper tube condenser –
coil
Coated aluminum fin/copper tube –
condenser coil
Low Ambient controls for cooling opera-•
tion down to 0°F (standard equipment
can operate down to 32°F)
Optional field-installed kit, when –
speci ed, for cooling operation down
to 0°F — kit includes control, louvers
and wind baffle plus installation
instructions
Low Ambient controls for operation •
down to 0°F (consult factory for avail-
ability)
Models 09–12 only:•
115v (single-zone only — S1CG or –
S1HG)
Field-installed thermostatically-con- –
trolled crankcase heater for straight
cool units (S1CG or S2CG) Recom-
mended for operation below 60°F.
Installer-supplied items
Power wiring•
Low Volt wiring (18 awg minimum)•
Secure mounting pad or foundation•
Refrigerant piping (if not purchased from •
EMI)
High Volt Disconnect•
Refrigerant for charging interconnect pip-•
ing (see charge table on page 15 )
NOTICE
Low Ambient controls are required
when the system is asked to cool at
outdoor temperatures below 32°F, this
may cause damage to the compressor
and coil, and may void the warranty. A
field-installed low-ambient kit allows
operation down to 0°F.
This is accomplished by cycling the
condenser fan on and off. This will,
in turn, maintain a constant low-side
pressure, providing a steady cooling
e ect and keeping the air handler from
frosting-up.
e optional kits include louvers/wind
baffle, crankcase heater, outdoor fan
cycling switch, and installation instruc-
tions.
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