Unit Installation; Location; Ground Installation; Roof Installation - Pioneer YD024GMFI18MR2 Installation Instructions Manual

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3.0 UNIT INSTALLATION

3.1 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. The
outdoor unit must have sufficient clearance for air entrance to the condenser coil, for air
discharge and for service access. See Fig.2
For multiple unit installations, units must be spaced a minimum of 18 inches
apart. (Coil face to coil face.)
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 accumu-
lated layer of hot air into the outdoor unit.
Provide an adequate structural support.

3.2 GROUND INSTALLATION

The unit may be installed at ground level on a solid base that will not shift or settle, caus-
ing strain on the refrigerant lines and possible leaks. Maintain the clearances shown in
Fig.2 and install the unit in a level position.
Normal operating sound levels may be objectionable if the unit is placed directly under
windows of certain rooms (bedrooms, study, etc.).
Top of unit discharge area must be unrestricted for at least 60 inches above the unit.
The outdoor unit should not be installed in an area where mud or ice could cause
personal injury or system damage.
Elevate the unit sufficiently to prevent any blockage of the air entrances by snow in
areas where there will be snow accumulation. Check the local weather bureau for the
expected snow accumulation in your area. Isolate the unit from rain gutters to avoid any
possible wash out of the foundation.

3.3 ROOF INSTALLATION

When installing units on a roof, the structure must be capable of supporting the total
weight of the unit, including a padded frame unit, rails, etc., which should be used to
minimize the transmission of sound or vibration into the conditioned space.

3.4 UNIT PLACEMENT

1. Provide a base in the pre-determined location.
2. Remove the shipping carton and inspect for possible damage.
3. Compressor tie-down nuts should remain tightened.
4. Position the unit on the base provided.
This system uses R410A refrigerant which operates at higher pressure than
R-22. No other refrigerant may be used in this system. Gauge sets, hoses,
refrigerant containers, and recovery system must be designed to handle
R410A. If you are unsure, consult the equipment manufacturer.
NOTE
WARNING
CAUTION