tions with add−on cooling coils require field−fabricated tran- sitions that provide at least 6 inches of clearance for the CBWMV unit’s inlet/outlet water lines. See figure 2 for ex- amples.
CBWMV Multi−Positional Unit
AIR
FLOW
RIGHT HAND DISCHARGE*
AIR
FLOW
AIR
FLOW
UPFLOW
DOWNFLOW BASE
AIR
FLOW
LEFT HAND DISCHARGE* 
DOWNFLOW
*CBWMV units must not be installed horizontally on the front or back of the unit.
Figure 2
Units may be horizontally installed in either attic or crawl space.
CAUTION
CBWMV series units are shipped with an antifreeze thermostat to prevent the water coil from freezing. The freezestat is installed at the factory but must be field wired (see figures 12 and 13). Do not bypass this feature when you install or run the unit.
CAUTION
Use a drain pan for installations over finished living areas.
Either suspend the unit from the roof rafters or floor joists or mount on a platform. The CBWMV unit must be level and well supported.
NOTE − 1/2 hp and 1 hp blower motors are equipped with three flexible legs and one rigid leg. The rigid leg is equipped with a shipping bolt and a flat white plastic wash- er (rather than the rubber mounting grommet used with a flexible mounting leg). The bolt and washer must be re- moved before the air handler is placed into operation. After the bolt and washer have been removed, the rigid leg will not touch the blower housing.
Duct System
Use
NOTE − Do not operate the air handler with an external static pressure that exceeds 0.8 inches w.c. Higher exter- nal static pressures may cause erratic operation.
Return Air Plenum
IMPORTANT
Return air must not be drawn from a room where any fossil fuel appliance (ie., a water heater) is installed.
When return air is drawn from a room, a negative pres- sure is created in the room. If a fossil fuel appliance is op- erating in a room with negative pressure, the flue prod- ucts can be pulled back down the vent pipe and into the room. This reverse flow of the flue gas may result in in- complete combustion and the formation of carbon mon- oxide gas. This toxic gas might then be distributed throughout the house by the air handler duct system.
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CBWMV SERIES
