38CKB(N), 38CMB, 38BRB
Split-System Air Conditioner
Model Specific Instructions
NOTE:
Read the entire instruction manual before starting the
installation. Refer to Split-System Air Conditioner Common
Installation and Start-Up Practices (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 death, 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
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions thor-
oughly and follow all warnings or cautions included in literature
and attached to the unit. Consult local building codes and National
Electrical Code (NEC) for special requirements.
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 word DANGER, WARNING, or 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, modifying, or servicing system, main elec-
trical disconnect switch must be in the OFF position. There
may be more than 1 disconnect switch. Lock out and tag
switch with a suitable warning label. Electrical shock can
cause personal injury or death.
INSTALLATION
Step 1—Mount Unit to Pad
Refer to Fig. 1 for pad dimensions and dimensions needed to
mount unit to pad.
Step 2—Refrigerant Tubing
Refer to Fig. 2 for refrigerant tube dimensions and connections.
Step 3—Mechanical Connection (38CKN Models)
1. Cut tubing to the correct length, deburr, and size as necessary,
making sure tube ends are square. If a large burr is evident, the
ID and OD must be deburred to allow tube to bottom in valve.
2. Remove lock nuts and ferrules from plastic bags taped to
service panel. (See Fig. 3.)
If undersized, damaged, or elliptically shaped tubing is used
when making connection, leaks could result.
3. Slide the lock nut and ferrule onto each tube. (See Fig. 4.)
4. Apply a few drops of refrigerant oil to the ferrule and valve
threads to reduce assembly torque and assist sealing.
5. Insert tube end into service valve until it bottoms.
6. Push the ferrule into place and hand tighten the nut until an
increase in torque is felt.
7. Mark the nut and tube and tighten 1-1/2 turns from the mark.
(See Fig. 5.) Keep the tube bottomed in the valve while
tightening nut.
NOTE:
A backup wrench on the hex part of the suction valve is
required while tightening.
Fig. 1—Mount Unit to Pad
UNIT SIZE
MIN. PAD
DIM. (IN.)
TIEDOWN KNOCKOUT
LOCATIONS
A
(In.)
B
(In.)
C
(In.)
38CKB(N)018, 024
18 X 18
3
15
10-3/16
38CKB(N)030-042
38CMB018-030
22-1/2 X 22-1/2
3-11/16
18-1/8
14-3/8
38BRB024-060
38CKB(N)048, 060
38CMB036-060
30 X 30
6-1/2
23-1/2
20
A94199
C
B
A
3
⁄
8
″
D. (9.53) TIEDOWN
KNOCKOUTS (2) PLACES
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. 533-837
Printed in U.S.A.
Form 38CKB-1SI
Pg 1
2-95
Replaces: New
