LIMITATIONS
These units must be installed in accordance with all national
and local safety codes. If no local codes apply, installation must
conform with the appropriate national codes. See Table 1 for
unit application data. Units are designed to meet National
Safety Code Standards.If components are to be added to a unit
to meet local codes, they are to be installed at the dealer's
and/or the customer's expense.
LOCATION
Use the following guidelines to select a suitable location for
these units.
1. The outdoor units must be installed outside the building.
The outdoor fans are the propeller type and are not suitable
for use with duct work.
2. The outdoor and indoor units should be installed as close
together as possible and with a minimum number of bends
in the refrigerant piping. Refer to REFRIGERANT PIPING
for additional information.
3. The outdoor unit should not be installed beneath windows
or between structures where normal operating sounds may
be objectionable.
WARNING: The outdoor unit should not be installed in an area
where mud and/or ice could cause personal injury.
Remember that condensate will drip from the un-
derside of the unit coils during heat and defrost cy-
cles and that this condensate will freeze when the
temperature of the outdoor air is below 32
°
F.
4. All units require certain clearances for proper operation and
service. Refer to General Installation Form 55.70-N1 for
additional guidelines.
On either roof top or ground level installations, rubber padding
can be applied between the base rails and their supports to
lessen any transmission of vibration.
ROOF-TOP LOCATIONS
Be careful not to damagethe roof. Consultthe buildingcontrac-
tor or architectif the roof is bonded.Choosea locationwith ade-
quate structural strength to support the unit.
The unit must be mounted on solid level supports. The sup-
ports can be channel iron beams or wooden beams treated to
reduce deterioration.
A minimum of two (2) beams are required to support each unit.
The beams should: (1) Be positioned perpendicular to the roof
joists. (2) Extend beyond the dimensions of the unit to
distribute the load on the roof, (3) Be capable of adequately
supporting the entire unit weight. Refer to Figure 1 and Table 2
for load distribution and weights.
Thesebeamscan usuallybe set directlyon the roof. Flashingis
not required.
NOTE:
On bonded roofs, check for special installation re-
quirements.
GROUND LEVEL LOCATIONS
The units must be installed on a substantial base that will not
settle. Any strain on the refrigerant lines may cause a refriger-
ant leak. Aone-piececoncrete slab with footers that extend be-
low the frost line is recommended. The slab should not be tied
to the building foundationbecause noise and vibration will tele-
graph into the building.
A unit can also be supported by concrete piers. These piers
should: (1) extend below the frost line, (2) be located under the
unit's four corners and (3) be sized to carry the entire unit
weight. Refer to Figure 1 and Table 2 for the center of gravity
and unit weight.
A gravel bed or some other means of handling the condensate
that will drop from the underside of the unit coil during the heat-
ing and defrost cycles may have to be provided.
CAUTION: Care should be taken to protect the unit from tam-
pering and unauthorized persons from injury.
Screws on access panels will prevent casual tam-
pering. Additional safety precautions such as
fences around the unit or locking devices on the
panels may be advisable. Check local authorities
for safety regulations.
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove any pack-
aging until the unit is near the place of installation.
Rig the unit by attaching nylon straps with hooks to the lifting
holes provided in the base rails. Spreaders, whose length ex-
ceeds the largest dimension across the unit, MUST be used
across the top of the unit if the rigging height above the top of
the unit is less than 5 feet. See Figure 2.
WARNING: Do not use straps under the unit or through the fork
lift slots for lifting purposes. Sharp metal edges
can damage the straps and could result in per-
sonal injury or equipment damage.
BEFORE LIFTING A UNIT, MAKE SURE THAT ITS WEIGHT
IS DISTRIBUTED EQUALLY ON THE STRAPS SO THAT IT
WILL LIFT EVENLY.
Unitary Products Group
3
035-15410-002-B-0404
INSTALLATION
Voltage Variation (Min/Max.)
1
208/230-3-60
460-3-60
380/415-3-50
187/252
432/504
342/456
Air Temperature on OUTDOOR coil,
°
F
Minimum
Maximum
Cool
Heat
Cool
Heat
40db
0db
2
115db
75db
Air Temperature on INDOOR coil,
°
F
Minimum
Maximum
Cool
Heat
Cool
Heat
57wb
50db
3
72wb
80db
Maximum Line Lengths - 125 ft.
1
Rated in accordance with ARI Standard 110, utilization range “A”.
2
Below 0
°
F, the control system stops the compressor and allows the electric heat accessory to
cycle at its standby capacity.
3
Operation below this temperature is permissible for a short period of time when a unit is
required to heat the conditioned space up to 50
°
F.
TABLE 1
- UNIT APPLICATION DATA
FRONT
APPROXIMATE
CENTER OF GRAVITY
BACK
(COIL
END)
A
C
D
B
Unit
Dim. (Iin.)
A
B
C
D
7-1/2 Ton
42-3/4
31-3/4
21-1/4
11-1/2
10 Ton
70-1/8
32
30-3/4
15-1/8
FIG. 1
- CENTER OF GRAVITY
