Ground Level Installation; Unit Precautions; Roof Curb Installations Only - Daikin M Series Installation Instructions Manual

Proper installation of the unit ensures trouble-free
operation. Improper installation can result in problems
ranging from noisy operation to property or equipment
damages, dangerous conditions that could result in injury
or personal property damage and that are not covered by
the warranty. Give this booklet to the user and explain it's
provisions. The user should retain these instructions for
future reference.
• To avoid possible illness or death of the building
occupants, do NOT locate outside air intake device
(economizer, manual fresh air intake, motorized
fresh air intake) too close to an exhaust outlet, gas
vent termination, or plumbing vent outlet. For specific
distances required, consult local codes.
• Allow minimum clearances from the enclosure for
fire protection, proper operation, and service access
(see unit clearances). These clearances must be
permanently maintained.
• When the unit is heating, the temperature of the
return air entering the unit must be a minimum of 55°
F.
Ground Level Installations Only:
• When the unit is installed on the ground adjacent
to the building, a level concrete (or equal) base is
recommended. Prepare a base that is 3" larger than
the package unit footprint and a minimum of 3" thick.
• The base should also be located where no runoff of
water from higher ground can collect in the unit.
• Consider the effect of outdoor fan noise on
conditioned space and any adjacent occupied
space. It is recommended that the unit be placed so
that condenser air discharge does not blow toward
windows less than 25 feet away.
• The unit should be set on a solid, level foundation
– preferably a concrete slab at least 4 inches
thick. The slab should be above ground level and
surrounded by a graveled area for good drainage.
Any slab used as a unit's foundation should not
adjoin the building as it is possible that sound and
vibration may be transmitted to the structure.
Heat Pumps require special location consideration in areas
of heavy snow accumulation and/or areas with prolonged
continuous subfreezing temperatures. Heat pump unit
bases have holes under the outdoor coil to permit drainage
of defrost water accumulation. The unit must be situated to
permit free unobstructed drainage of the defrost water and
ice. A minimum of 2" clearance under the outdoor coil is
required in milder climates. See FIGURE 1: HEAT PUMP
ELEVATION CHART.
Heat Pump Elevation Chart
Design Temperature Suggested Minimum Elevation
+15° and above
-5° to +14°
Below -5°
Figure 1: Heat Pump Elevation Chart
Roof top Installations Only:
• To avoid possible property damage or personal
injury, the roof must have sufficient structural
strength to carry the weight of the unit(s) and snow
or water loads as required by local codes. Consult
a structural engineer to determine the weight
capabilities of the roof.
• The unit may be installed directly on wood floors
or on Class A, Class B, or Class C roof covering
material.
• To avoid possible personal injury, a safe, flat surface
for service personnel should be provided.
• Adequate clearances from the unit to any adjacent
public walkways, adjacent buildings, building
openings or openable windows must be maintained
in accordance with National Codes.

Unit Precautions

• Do not stand or walk on the unit.
• Do not drill holes anywhere in panels or in the base
frame of the unit except where indicated. Unit
access panels provide structural support.
• Do not remove any access panels until unit has been
installed on roof curb or field supplied structure.
• Do not roll unit across finished roof without prior
approval of owner or architect.
• Do not skid or slide on any surface as this may
damage unit base. The unit must be stored on a flat,
level surface. Protect the condenser coil because it
is easily damaged.
All curbs look similar, to avoid incorrect curb
positioning, check job plans carefully and verify
markings on curb assembly. Instructions may
vary in curb styles and supersedes information
shown.

Roof Curb Installations Only:

Curb installations must comply with local codes and should
be done in accordance with the established guidelines of
the National Roofing Contractors Association.
Proper unit installation requires that the roof curb be firmly
and permanently attached to the roof structure. Check for
adequate fastening method prior to setting the unit on the
curb.
5
2 ½"
8"
12"
CAUTION