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If either refrigerant tubing or indoor coil is exposed to at-
mospheric conditions for longer than 5 minutes, it must be
evacuated to 1000 microns to eliminate contamination and
moisture in the system.
Run refrigerant tubes as directly as possible, avoiding un-
necessary turns and bends. Suspend refrigerant tubes so they
do not damage insulation on vapor tube and do not transmit
vibration to structure. Also, when passing refrigerant tubes
through wall, seal opening so that vibration is not transmit-
ted to structure. Leave some slack in refrigerant tubes be-
tween structure and outdoor unit to absorb vibration. Refer
to separate indoor unit installation instructions for addi-
tional information.
INSTALL FILTER DRIER AND MOISTURE INDICA-
TOR — The filter drier is factory supplied and field in-
stalled. Moisture indicator (sight glass) is a field-supplied
option and should be installed just after liquid line shutoff
valve. Do not use a receiver (a receiver is not provided with
unit and one should not be used).
MAKE PIPING SWEAT CONNECTIONS — Remove plas-
tic caps from liquid and suction service valves. Use refrig-
erant grade tubing. Service valves are closed from the fac-
tory and are ready for brazing. After wrapping the service
valve with a wet cloth, the tubing set can be brazed to the
service valve using either silver bearing or non-silver bear-
ing brazing material. Consult local code requirements.
Refrigerant tubing and indoor coil are now ready for leak
testing.
NOTE: Unit is shipped with R-22 factory holding charge
indicated on nameplate.
Unit 38QR
Operating Weight (lb)
Refrigerant
Compressor
Type
Model
Oil (pt) — Initial/Recharge
Crankcase Heater Watts
Outdoor Fan
Rpm
Diameter (in)-no. of Blades
Fan Pitch (Deg)
Motor Hp
Nominal Airflow (cfm)
Outdoor Coil
Face Area (Sq Ft)/Rows
Fins./in.
Line Sizes† — (in. OD)
Vapor
Liquid
Valve Connection — ODF (in.)
Vapor
Liquid
Controls — Pressurestat Settings
High Cutout (psig)
High Cut-in (psig)
Low Cutout (psig)
Low Cut-in (psig)
Fusible Plug
*The second row of the coil is one half of the height of the first row.
†Line sizes are for runs up to 25 ft.
Table 1 — Physical Data
018C-3
024C-3
030C-3
154
167
180
Reciprocating
Tecumseh
Tecumseh
Copeland
AW5519G
AW5524G
ZR28KI-PFV
32/30
32/30
28/24
19
19
Propeller Type, Direct Drive, Horizontal
850
850
850
18-3
18-3
18-3
25
27
1
⁄
1
⁄
8
8
1720
1720
1720
6.1/1.5*
6.1/2
6.1/3
15
15
5
⁄
5
⁄
8
8
3
⁄
3
⁄
8
8
⁄
⁄
5
5
8
8
3
⁄
3
⁄
8
8
5
Pass nitrogen or other inert gas through piping while brazing
to prevent formation of copper oxide.
To avoid damage while brazing, service valves should
be wrapped with a heat-sinking material such as a wet
cloth.
When brazing tubing sets to the service valves, a braz-
ing shield MUST be used to prevent damage to the painted
unit surface.
PROVIDE SAFETY RELIEF — A fusible plug is located in
unit suction line; do not cap this plug. If local code requires
additional safety devices, install as directed.
036C-3
036C-5,6
184
249
R-22
Hermetic
Scroll
Copeland
Copeland
ZR34KI-PFV
CRH3-0275
34/30
55/51
—
—
40
850
850
18-3
24-3
27
31
24
1
⁄
1
⁄
8
8
1720
3900
Copper Tube, Aluminum Plate Fin
6.1/3
12.3/2
15
15
15
3
⁄
3
⁄
4
4
3
⁄
3
⁄
8
8
⁄
⁄
3
3
4
4
3
⁄
3
⁄
8
8
426
7
320
20
7
3
22
5
210 F
048C-3,5,6
060C-3,5,6
252
272
Reciprocating
Tecumseh
Copeland
AV5549G
CRP5-0450
54/50
70/66
27
40
850
850
24-3
24-3
24
24
1
⁄
1
⁄
1
⁄
4
4
4
3900
3900
12.3/2
12.3/3
15
15
3
⁄
1
1
⁄
1
1
⁄
4
8
8
3
⁄
3
⁄
3
⁄
8
8
8
⁄
⁄
⁄
7
7
7
8
8
8
3
⁄
3
⁄
3
⁄
8
8
8
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