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Reheat Operation − General
The following conditions must be met before reheat will be
energized:
1− Blower must be operating.
2− System must be in occupied mode.
3− System must NOT be operating in heating mode.
4− One cooling demand is required if the unit has been
in heating mode, the IMC has been reset, or at initial
unit start−up.
Reheat Operation − Default
Reheat will operate as shown in table 18.
IMPORTANT − Free cooling does not operate during
reheat. Free cooling will operate as shown in the
IMC manual.
TABLE 18
Reheat Operation
T’stat and HuE
midity Demands
Operation
Reheat Only
Compressor Reheat
Reheat & Y1
Compressor Cooling*
*If there is no reheat demand and outdoor air is suitable,
free cooling will operate.
Combination of Demands
Table 18 shows unit operation at reheat and thermostat
demands. The following examples show unit operation
when reheat and thermostat demands overlap.
1− Compressor is operating (Y1) and a reheat
demand is initiated:
No change in operation.
2− Compressor reheat is operating and a Y1 cooling
demand is initiated:
Compressor does not de−energize; L14 reheat valve
is de−energized for compressor cooling.
3− Compressor reheat is in operation and outdoor
air is suitable for free cooling; then reheat
demand is satisfied:
Free cooling is energized and compressor is
de−energized.
Service
The unit should be inspected once a year by a qualified
service technician.
WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during
installation, maintenance, or repair will expose you
to fiberglass wool. Breathing this may cause lung
cancer. (Fiberglass wool is known to the State of
California to cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact
your supervisor.
P.O. Box 799900
Dallas, TX 75379−9900
A−Lubrication
All motors and blower shaft bearings are prelubricated.
No further lubrication is needed.
B−Filters
Unit is equipped with two 16 X 25 X 2" pleated throw−away
type filters. Filters should be checked and replaced when
necessary. See figure 22.
NOTE−Filters must be U.L.C. certified or equivalent for
use in Canada.
FIGURE 22
FILTER REMOVAL
