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356214-XIM-A-0108
8 Johnson Controls Unitary Products
LOCATION
Use the following guidelines to select a suitable loca-
tion for these units.
1. Unit is designed for outdoor installation only.
2. Condenser coils must have an unlimited supply of
air.
3. Where a choice of location is possible, position the
unit on either north or east side of building.
4. For ground level installation, use a level concrete
slab with a minimum thickness of 4 inches. The
length and width should be at least 6 inches
greater than the unit base rails. Do not tie slab to
the building foundation.
5. Roof structures must be able to support the weight
of the unit and its options and/or accessories. Unit
must be installed on a solid level roof curb or
appropriate angle iron frame.
6. Maintain level tolerance to 1/2 inch maximum
across the entire length or width of the unit.
If a unit is to be installed on a roof curb or special frame
other than a YORK roof curb, gasketing must be
applied to all surfaces that come in contact with the unit
TABLE 1: UNIT APPLICATION DATA
UNIT MODEL NUMBER DM180 DM240 DM300
Voltage Variation,
Min. / Max.
1
380/415-3-50 342/456
Supply Air CFM, Min. / Max. 4,500 / 7,200 6,000 / 9,400 7,500 / 12,500
Wet Bulb Temperature (ºF) of Air on
Evaporator Coil, Min. / Max.
57 / 72
Dry Bulb Temperature (ºF) of Air on
Condenser Coil, Min. / Max.
0 / 125
1.
Utilization range “A” in accordance with ARI Standard 110.
Excessive exposure of this furnace to contami-
nated combustion air may result in equipment
damage or personal injury. Typical contami-
nates include: permanent wave solutions, chlo-
rinated waxes and cleaners, chlorine based
swimming pool chemicals, water softening
chemicals, carbon tetrachloride, Halogen type
refrigerants, cleaning solvents (e.g. perchloro-
ethylene), printing inks, paint removers, var-
nishes, hydrochloric acid, cements and glues,
antistatic fabric softeners for clothes dryers,
masonry acid washing materials.