Installation Manual and Owner's Guide
Page 26mrcool.com
Outdoor Unit Installation
SPECIAL CONSIDERATIONS FOR 
EXTREME WEATHER
If the unit is exposed to heavy wind: 
Install unit so that air outlet fan is at a 90° 
angle to the direction of the wind. If 
needed, build a barrier in front of the unit 
to protect it from extremely heavy winds. 
Ensure the wind barrier does not block 
necessary air flow. See Fig. 6.2 and 
Fig. 6.3 below.
If the unit is frequently exposed to 
heavy rain or snow:
Build a shelter above the unit to protect
it from the rain or snow. Be careful not to 
obstruct air flow around the unit.
Step 2: Install drain joint
Heat pump units require a drain joint ONLY if the 
unit is elevated. DO NOT install if the unit is sitting 
on the ground or concrete pad. 
Before bolting the outdoor unit in place, you must 
install the drain joint at the bottom of the unit. 
Note that there are two different types of drain 
joints depending on the type of outdoor unit.
Strong wind
Strong wind
Fig. 6.2
Fig. 6.3
Strong wind
Wind Baffle
 IN COLD CLIMATES 
In cold climates, make sure that the drain 
hose is as vertical as possible to ensure swift 
water drainage. If water drains too slowly, it 
can freeze.
Seal
Drain joint (only use if elevated)
(A) (B)
Base pan hole of
outdoor unit
Seal 
Fig. 6.4
If the drain joint comes with a rubber seal 
(see Fig. 6.4 - A), do the following:
1.  Fit the rubber seal on the end of the drain joint that 
will connect to the outdoor unit.
2. Insert the drain joint into the hole in the base pan of 
the unit.
3. Rotate the drain joint 90° until it clicks in place 
facing the front of the unit.
4. Connect a drain hose extension (not included) to 
the drain joint to redirect water from the unit during 
heating mode.
If the drain joint doesn’t come with a rubber seal 
(see Fig. 6.4 - B), do the following:
1. Insert the drain joint into the hole in the base pan 
of the unit. The drain joint will click in place.
2. Connect a drain hose extension (not included) to 
the drain joint to redirect water from the unit during 
heating mode.










