Johnson Controls SA PD 180 THRU 240 - Manual (Page 5)

430645-YIM-D-0610
Johnson Controls Unitary Products 5
Installation
Limitations
These units must be installed in accordance with all national
and local safety codes. If no local codes apply, installation must
conform to the appropriate national codes. 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
both the condensing unit and the evaporator.
1. The heat pump is designed for outdoor installation only.
2. The condenser fans are the propeller type and are not
suitable for use with ductwork in the condenser air stream.
3. The heat pump and the evaporator should be positioned to
minimize the number of bends in the refrigerant piping.
4. The heat pump should be as close to the evaporator as
practical.
5. The heat pump should not be installed where normal
operating sounds may be objectionable.
6. The evaporator should be located within the building, either
outside or inside the conditioned space.
Rooftop Locations
Be careful not to damage the roof. Consult the building
contractor or architect if the roof is bonded. Choose a location
with adequate structural strength to support the unit.
The heat pump must be mounted on level supports. The
supports can be channel iron beams or wooden beams treated
to reduce deterioration.
Minimums 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 section to
distribute the load on the roof. (3) Be capable of adequately
supporting the concentrated loads at the corners. These beams
can usually be set directly on the roof. Flashing is not required.
NOTE: On bonded roofs, check for special installation
requirements.
Ground Level Locations
It is important that the units be installed on a substantial base
that will not settle, causing strain on the refrigerant lines and
possible leaks. A one-piece concrete slab with footers that
extend below the frost line is recommended. The slab should
not be tied to the building foundation, as noise will telegraph
through the slab.
Table 2: Unit Application Data
Voltage Variation
1
Min. / Max.
1.Utilization range “A” in accordance with ARI Standard 110.
208/230-3-60 187/252
460-3-60 432/504
575-3-60 540/630
Ambient Air on Condenser Coil
Min. /Max. 2
2.These units can operate in an ambient temperature of
125°F providing the wet bulb temperature of the air enter-
ing the evaporator coil does not exceed 67°F. Unit can
operate to 0°F if equipped with a low ambient kit.
40°F/125°F
Suction Pressure at Compressor and
Corresponding Temp. at Saturation
Min. / Max.
101.6 psig / 156.6 psig
32.0 ºF / 55.0 ºF