Prevailing Wind Barrier; Clearances For Outdoor Unit; Condensate Drainage - Johnson Controls DHPM09NWM42Q1 Installation Manual

898150-UIM-B-0113
4. Install the unit high enough above the ground or roof to allow ade-
quate drainage of defrost water and prevent ice or snow build-up
(required for heat pumps).
5. In heavy snow areas, do not locate the unit where drifting will occur.
The unit base should be elevated above the depth of average
snows.
6. When installed in areas where low ambient temperatures exist,
locate unit so winter prevailing winds do not blow directly onto out-
door unit.
7. If unit coil cannot be installed away from prevailing winter winds, a
wind barrier should be constructed. Size barrier at least the same
height and width as outdoor unit. Install barrier 12 inches minimum
from the sides of the unit in the direction of prevailing winds as illus-
trated in Figure 2.
PREVAILING WINTER WINDS
WIND BARRIER
INLET AIR
DISCHARGE AIR
FIGURE 2: Prevailing Wind Barrier
8. Locate unit away from overhanging roof lines which would allow
water or ice to drop on, or in front of, coil or into unit.
9. Install in a location that has good airflow.
10. Install in a location that has a rigid wall or support to minimize the
sound operation and/or vibration.
11. Slab or roof mounting - install the unit a minimum of 4 inches above
the roof or ground surface to avoid ice build-up around the unit.
Locate the unit above a load bearing wall or area of the roof that
can adequately support the unit. Consult local codes for rooftop
applications.
12. Install in a location that's far away from combustible materials and
vapors.
13. Install in a location that's at least 10 ft away from a TV and radio
antennas to avoid possible interferences with the operation of the
air conditioner/heat pump.
14. Install the unit horizontally.
INSTALL UNIT AWAY
FROM WINDOW
I
FIGURE 3: Clearances for Outdoor Unit
4
12" (305MM) MINIMUM DISTANCE
E
F
G
H
Reference
E Clearance above unit
F Clearance between air inlet and structure
G
H Clearance between unit and structure
I
FIGURE 3: Clearances for Outdoor Unit
NOTICE
It is advisable to make a piping loop near outdoor unit so as to
reduce vibration.
For increased efficiency, install the outdoor unit in a location where
continuous direct sunlight or excessive water can be avoided as
much as possible.
NOTICE
When operating the air conditioner in low outside temperature, be
sure to follow the instructions described below.
• Never install the outdoor unit in a place where its air inlet/outlet
side may be exposed directly to wind.
• To prevent exposure to wind, install the outdoor unit with its air inlet
side facing the wall and a baffle board on the air outlet side.
Avoid the following places for installation where air conditioner trouble
is liable to occur.
• Where flammable gas could leak.
• Where there is an excessive amount of machine oil in the air.
• Where sulfide gas is generated such as a hot spring.
• Where there is high-frequency equipment.
CONDENSATE DRAINAGE REQUIREMENT (HEAT
PUMP ONLY)
Condensate formed during the heating and defrost processes must be
drained from heat pump units. Drain holes are provided in the base of
the units to ensure proper drainage. Heat pumps must be raised when
installed on a concrete pad or the ground to allow drainage to occur. If
the heat pump unit is installed on a wall mounting bracket, insert the
provided drain connector into one of the 1 inch drain holes and attached
a field-provided insulated drain hose to the connector. Use the provided
rubber plugs to cover any unused drain holes. See Figure 4.
BOTTOM FRAME
DRAIN PLUG
DRAIN CONNECTOR
HOSE (available commerially, inner dia. 0.63")
FIGURE 4: Condensate Drainage
Required
Location
Clearance
12 inches
12 inches
12 inches
DRAIN-WATER HOLE
Johnson Controls Unitary Products
2 feet
7 feet