38BR
Split-System Air Conditioner
Installation and Start-Up Instructions
NOTE:
Read the entire instruction manual before starting the
installation. Refer to Split-System Air Conditioning Installation
and Start-Up Instructions (included in this packet).
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause personal injury or property damage.
Consult a qualified installer, service agency, or your distributor or
branch for information or assistance. The qualified installer or
agency must use factory-authorized kits or accessories when
modifying this product. Refer to the individual instructions pack-
aged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher
available. Read these instructions thoroughly and follow all
warnings or cautions attached to the unit. Consult local building
codes and National Electrical Code (NEC) for special require-
ments.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which would result in minor personal
injury or product and property damage.
Before installing or servicing system, always turn off main
power to system. There may be more than 1 disconnect
switch. Turn off accessory heater power if applicable. Elec-
trical shock can cause personal injury or death.
INSTALLATION
Step 1—Mounting Pad
Refer to Table 1 for mounting pad dimensions.
Step 2—Refrigerant Tubing
Refer to Table 2 for proper refrigerant tube diameters.
Step 3—Install Solenoid Valve In Liquid Tube (If Re-
quired)
Not all applications require use of a liquid line solenoid valve.
If your unit has been shipped with a liquid line solenoid valve
in the unit, it must be installed for performance enhancement.
The liquid line solenoid valve must be energized during
evacuation for complete removal of refrigerant.
Before making liquid tube connections, install factory-supplied
solenoid valve on indoor liquid fitting. (See Fig. 2.) Be sure to use
flare adapter supplied with the indoor coil when making connec-
tions.
Fig. 1—Unit Connections
A93578
LIQUID LINE CONN
FIELD CONTROL
SUPPLY CONN
7
⁄
8
″
DIA HOLE
FIELD POWER
SUPPLY CONN
7
⁄
8
″
DIA HOLE WITH
1
1
⁄
8
″
DIA KNOCKOUT
AND 1
3
⁄
8
″
DIA
KNOCKOUT
AIR DISCHARGE
SUCTION LINE CONN
Table 1—Mounting Pad Dimensions
UNIT SIZE
MINIMUM DIMENSIONS (IN.)
024-060
30 X 30
Note: Mounting pad may differ by series.
Table 2—Refrigerant Connections and Recom-
mended Liquid and Vapor Tube Diameters (In.)
UNIT
SIZE
LIQUID
VAPOR
Connection
Diameter
Tube
Diameter
Connection
Diameter
Tube
Diameter
024
3/8
3/8
5/8
5/8
030, 036
3/8
3/8
3/4
3/4
042, 048
3/8
3/8
7/8
7/8
060
3/8
3/8
7/8
1-1/8
Note: Tube diameters are for lengths up to 50 ft. For tubing lengths greater
than 50 ft, consult your local distributor or the Long-Line Application Guideline.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1
4
Tab
3a 2a
PC 101
Catalog No. 533-838
Printed in U.S.A.
Form 38BR-3SI
Pg 1
5-94
Replaces: 38BR-2SI
