70 f – Carrier 38BA User Manual
Page 20
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Table 18 — Minimum Outdoor Operating Temperature
%
MIN OUTDOOR OPER
UNIT
NO. OF
FULL
TEMP (F)
CYL
LOAD
Standard
With Head
CAP.
Unit
Press. Control*
38GR006
4
100
45
-20
38BA008
4
100
55
-20
38BA009
6
100
50
-20
38AD012
6
100
20
and
4
67
34
-20
38AD014
2
t
33
47
38AD016
6
4
100
67
0
20
-20
38AD024
4
2
100
50
0
20
-20
38AD028
6
100
15
and
4
67
30
-20
38AD034
2
33
45
8
100
38
38AE044
6
4
75
50
41
44
-20
2
25
57
10
r 100
14
8
80
29
38AE054
6
60
34
-20
4
40
40
2
20
47
12
100
14
10
83
17
38AE064
8
6
67
50
24t
32
-20
4
33
45
2
17
58t
*Accessory 32 Series Motormaster®Control
i Requires accessory pressure-operated unloader package
NOTE: Minimum outdoor air operating temperatures are based
on the following conditions:
MIN COND TEMP
90 F
80 F
%
COMPR CAP.
100-75
75-50
70 F
50-17
On applications with multiple DX coils, the compressor may be
unloaded while an individual zone coil (s) is still fully loaded For
proper expansion valve operation under this condition, maintain
a 90 F condensing temperature Increase allowable minimum
outdoor operating temperature by the difference (F) between
required 90 F condensing temperature, and the minimum con
densing temperature shown in footnote table with compressor
unloaded A 90 F condensing temperature may be maintained by
using
the
Motormaster
control
'regardless
of
outdoor
air
temperatures down to —20 F
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Tab 4
Form 38AD-5XA Supersedes 38AD-4XA
Printed in USA
5-75
Codes B and MS
Catalog No 51 3-801