The maximum and minimum conditions for operation must be
observed to assure a system that will give maximum perform-
ance with minimum service.
LOCATION
Before starting the installation, select and check the suitability
of the location for both the indoor and outdoor unit. Observe all
limitations and clearance requirements, see Figure 3.
The outdoor unit must have sufficient clearance for air entrance
to the condenser coil, for air discharge and for service access.
If the unit is to be installed on a hot sun exposed roof or a
black-topped ground area, the unit should be raised sufficiently
above the roof or ground to avoid taking the accumulated layer
of hot air into the outdoor unit.
Provide an adequate structural support.
The unit may be installed at ground level on a solid base that
will not shift or settle, causing strain on the refrigerant lines and
possible leaks. Maintain the clearances shown Figure 3 and
install the unit in a level position. Isolate the base from the
building structure to avoid noise or vibration transmission.
When installing units on a roof, the structure must be capable
of supporting the total weight of the unit, including a pad, lintels,
rails, etc., which should be used to minimize the transmission
of sound or vibration into the conditioned space.
Isolate the unit from rain gutters to avoid any possible wash out
of the foundation.
Normal operating sound levels may be objectionable if the unit
is placed directly under windows of certain rooms (bedrooms,
study, etc.).
Condensate will drain from beneath the coil of the outdoor unit
during the defrost cycle. Normally this condensate may be
allowed to drain directly onto the ground. A gravel bed may be
used to prevent mud splashing.
WARNING: The outdoor unit should not be installed in an area
where mud or ice could cause personal injury.
Remember that condensate will drip from the unit
coils during heat and defrost cycles and that this
condensate will freeze when the temperature of the
outdoor air is below 32
°
F.
Elevate the unit sufficiently to prevent any blockage of the air
entrances by snow in areas where there will be snow accumu-
lation. Check the local weather bureau for the expected snow
accumulation in your area.
INSTALLATION PROCEDURES
The following sequence of installation steps is suggested.
1. Inspect unit and set in place.
2. Make electrical power connections.
3. Check orifice size and replace with correct size if necessary.
4. Route the vapor and liquid lines.
5. Install liquid line filter drier. See “DRIER INSTALLATION”
6. Connect tubing and leak test.
7. Make electrical control connections.
8. Charge system.
9. Instruct owner.
DRIER INSTALLATION
NOTE: DRIERS ARE NOT SUPPLIED WITH THIS EQUIP-
MENT AND MUST BE FIELD INSTALLED AT THE
TIME OF EQUIPMENT INSTALLATION.
For new installations we recommend a 8 cubic inch minimum
solid core bi-flow filter-drier for 1- 3 tons, and a 10 cubic inch
minimum for 3.5 - 5 tons. Install in the liquid line, external to
the outdoor unit.
For clean-up after a burnout a larger capacity drier is recom-
mended. Always remove any driers on the unit at the time of
burnout. Driers should be replaced any time the refrigerant
circuit is repaired. When adding a drier to a system, additional
refrigerant must be added to compensate for the drier addition.
Refer to vendor specifications for the additional refrigerant
amount.
For a particular filter-drier brand, refer to Source 1 Manual or
original manufactor’s recommended size, additional refrigerant
charge requirements, connection size and type.
RUBBER
ELEVATING
GROMMETS
(4)
UNIT
BASE
PAN
Note: Do Not block drainage
holes with grommets.
FIGURE 1 - POSITIONING GROMMETS - "A" CUBE
RUBBER
ELEVATING
GROMMETS
(4)
UNIT
BASE
PAN
Note: Do Not block
drainage holes with
grommets.
FIGURE 2 - POSITIONING GROMMETS - "B" CUBE
515.26-N5Y
2
Unitary Products Group
