Drain Joint Installation; Notes On Drilling Hole In Wall; When Select A 24K Indoor Unit - Carrier 38QUS014DS2 Series Installation Manual

5. OUTDOOR UNIT INSTALLATION
NOTE: The minimum distance between the
outdoor unit and walls described in the
installation guide does not apply to airtight
rooms. Be sure to keep the unit
unobstructed in at least two of the three
directions (M, N, P) (See Fig. 5.7)
M
N

5.2 Drain Joint Installation

Before bolting the outdoor unit in place, you
must install the drain joint at the bottom of
the unit. (See Fig. 5.8)
1. Fit the rubber seal on the end of the drain
joint where it will connect to the outdoor
unit.
2. Insert the drain joint into the hole in the
base pan.
3. Rotate the drain joint 90° until it clicks in
place and faces 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.
NOTE: Make sure the water drains to a
safe location where it will not cause water
damage or a slipping hazard.
Seal
Seal
Drain joint
(A)
Fig. 5.8
P
Fig. 5.7
Base pan hole of
outdoor unit
(B)

5.3 Notes On Drilling Hole In Wall

H
You must drill a hole in the wall for the
refrigerant piping, and signal cable that will
connect the indoor and outdoor units.
1. Determine the location of the wall hole
based on the location of the outdoor unit.
2. Using a 65-mm (2.5") core drill, drill a
hole in the wall.
NOTE: When drilling the wall hole, make
sure to avoid wires, plumbing, and other
sensitive components.
3. Place the protective wall cuff in the hole.
This protects the edges of the hole and
helps seal it when you finish the
installation process.

5.4 When Select a 24K Indoor Unit

The 24K indoor unit can only be connected
with an A system. If there are two 24K
indoor units, they can be connected with A
and B systems. (See Fig. 5.9)
Table 5.3: Connective pipe size of an A and
B system (unit: inch)
Indoor Unit capacity
(Btu/h)
7K/9K/12K
18K
24K
Liquid Gas
1/4 3/8
1/4 1/2
3/8 5/8
Fig. 5.9
GB-12 7