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GROUNDING MAY ALSO BE ACCOMPLISHED BY
GROUNDING THE POWER LINE CONDUIT TO THE
UNIT. MAKE SURE THE CONDUIT NUT LOCKING TEETH
HAVE PIERCED THE INSULATING PAINT FILM OF THE
SIDE PANEL.
E. THERMOSTAT
The thermostat should be mounted on an inside wall about
five feet above the floor in a location where it will not be
affected by unconditioned air, sun, or drafts from open doors
or other sources. READ installation instructions in air condi-
tioner thermostat package CAREFULLY because each has
some different wiring requirements.
XII. INDOOR AIR FLOW DATA
Belt-drive blower models have motor sheaves set for proper
CFM at a typical external static. See Tables C through G for
blower performance.
XIII. CRANKCASE HEAT (OPTIONAL)
Crankcase heaters are standard on 6 ton and single stage 7
1
⁄2.
Crankcase heat is not required on other models, but may be
desirable under certain conditions.
XIV. PRE-START CHECK
1. Is unit properly located and slightly slanted toward indoor
condensate drain?
2. Is ductwork insulated, weatherproofed, with proper spacing
to combustible materials?
3. Is air free to travel to and from outdoor coil? (See Figure 4.)
4. Is the wiring correct, tight, and according to unit wiring dia-
gram?
5. Is unit grounded?
6. Are field supplied air filters in place and clean?
7. Do the outdoor fan and indoor blower turn freely without
rubbing, and are they tight on the motor shafts?
FIGURE 14
16