Installation Tips; Outdoor Unit Installation - Carrier 38MAQB09R-1 Installation Instructions Manual

INSTALLATION TIPS

Ideal installation locations include:
Outdoor Unit
S A location which is convenient to installation and not exposed to
strong wind.
S A location which can bear the weight of outdoor unit and where
the outdoor unit can be mounted in a level position.
S A location which provides appropriate clearances (see Fig. 3).
S Do not install the indoor or outdoor units in a location with
special environmental conditions. For those applications, contact
your Ductless Split representative.

OUTDOOR UNIT INSTALLATION

1. Use a rigid base to support unit in a level position.
2. Locate outdoor unit and connect piping and wiring.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
In regions with snowfall and cold temperatures, avoid
installing the outdoor unit in areas where it can be covered by
snow. If the outdoor unit is installed in areas where heavy
snow is expected, a field supplied ice or snow stand and/or
field supplied−installed wind baffle should be installed to
protect the unit from snow accumulation and/or blocked air
intake. Blocking the air intake may result in reduced airflow,
significantly reduced performance and damage to the
equipment.
Strong
wind
Fig. 5 - High Wind Installation
MAKE REFRIGERANT PIPING CONNECTIONS
(OUTDOOR UNIT)
IMPORTANT: Use refrigeration grade tubing ONLY. No other
type of tubing may be used. Use of other types of tubing will
void manufacturer's warranty.
Do not open service valves or remove protective caps from tubing
ends until all the connections are made.
Bend tubing with bending tools to avoid kinks and flat spots.
Keep the tubing free of dirt, sand, moisture, and other
contaminants to avoid damaging the refrigerant system.
Avoid sags in the suction line to prevent the formation of oil traps.
Insulate each tube with minimum 3/8−in. (10 mm) wall thermal pipe
insulation. Inserting the tubing into the insulation before making the
connections will save time and improve installation quality.
1. Remove the service valve cover, if provided with the unit.
2. Cut the pipe, with a pipe cutter, at 90 degrees (see Fig. 6).
3. Remove the service connection, if provided with the unit.
90
Fig. 6 - Cut the Pipe
A07350
Oblique Roughness Burr
A150767
4. Remove all the burrs from the cut cross section of the pipe
avoiding any burrs inside the tubes.
5. Remove the flare nuts attached to the indoor and outdoor
units.
6. Install the correct size flare nut onto the tubing and make a
flare connection. Refer to Table 6 for the flare nut spaces.
Table 6—Flare Nut Spacing
OUTER DIAM. (mm)
Ø1/4"(6.35) 0.05 (1.3)
Ø3/8"(9.52) 0.06 (1.6)
Ø1/2"(12.7) 0.07 (1.8)
Ø5/8"(15.88) 0.09 (2.2)
Bar
Copper pipe
Clamp handle
Fig. 7 - Flare Nut Spacing
7. Apply a small amount of refrigerant oil to the flare
connection on the tubing.
8. Align center of the pipes and/or service valve.
Indoor unit tubing
Fig. 8 - Align Pipe Center
9. Connect both the liquid and gas piping to the indoor unit
10. Tighten the flare nut using a torque wrench as specified in
the Table 7.
11. Complete the installation.
Table 7—Tightening Torque
PIPE DIAMETER
INCH (mm)
Ø1/4" (6.35) 10 to 13
Ø3/8" (9.52) 24 to 31
Ø1/2" (12.7) 37 to 46
50 to 60
Ø5/8" (15.88)
Flare nut
Copper tube
Fig. 9 - Tighten the Flare Nut
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Excessive torque can break flare nut depending on
installation conditions.
8
A (mm)
Max. Min.
0.03(0.7)
0.04(1.0)
0.04(1.0)
0.08(2.0)
Handle
Bar
Yoke
Cone
Red arrow mark
A150768
Flare nut Piping
A150769
TIGHTENING TORQUE
Ft-lb N-m
13.6 to 17.6
32.5 to 42.0
50.1 to 62.3
67.7 to 81.3
A150770