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UNIT
40RMS
028, 034
40RM
034
*See Fig. 6 for access hole location by number.
†Fittings are listed in order from header or tee stub connection out to access hole in corner support post.
Chilled Water Piping —
chilled water connection sizes. For ease in brazing, it is recom-
mended that all internal solder joints be made before unit is
placed in final position.
Knockouts are provided in the unit corner posts for 40RM
and 40RMQ refrigerant piping; additional field-fabricated ac-
cess holes are required for 40RMS chilled water piping. See
Fig. 6, which lists recommended knockouts and access holes to
use for each 40RMS unit size.
Table 3 — Fitting Requirements (cont)
ACCESS
CONNECTION
HOLE NO.*
5
Supply
6
Return
7
Return
8
Supply
1
Suction
2
3
4
Suction
See Tables 1C and 1F for
Fig. 12 — Typical 40RMS Chilled Water Piping
CIRCUIT
TYPE
Lower
Lower
Upper
Upper
Lower
Liquid
Lower
Liquid
Upper
Upper
To size, design, and install chilled water piping, consult the
Carrier System Design manual. See Fig. 12 for an example of a
typical installation. Recommended fittings are listed in Table 3.
To access 40RMS coil vents and drains, remove the unit
side panel over the coil header. Vent and drain plugs are on the
top and bottom of header, respectively. See the Service section
for information on preventing coil freeze-up during winter.
19
FITTINGS REQUIRED†
(in.)
1
2
/
Long Radius Elbow
8
1
1
2
/
Nipple, 3
/
L
8
2
1
2
/
Long Radius Elbow
8
1
2
/
Long Radius Elbow
8
1
2
/
Nipple, 3 L
8
1
2
/
Long Radius Elbow
8
1
2
/
Long Radius Elbow
8
1
7
2
/
Nipple, 6
/
L
8
8
1
2
/
Long Radius Elbow
8
1
2
/
Long Radius Elbow
8
1
7
2
/
Nipple, 11
/
L
8
8
1
2
/
Long Radius Elbow
8
3
1
/
Street Elbow
8
3
1
/
Nipple, 3 L
8
3
1
/
Long Radius Elbow
8
5
/
Street Elbow
8
5
3
/
Nipple, 7
/
L
8
4
5
/
Long Radius Elbow
8
5
/
Street Elbow
8
5
1
/
Nipple, 18
/
L
8
2
5
/
Long Radius Elbow
8
3
3
1
/
Nipple, 4
/
L
8
16
3
1
/
Long Radius Elbow
8
3
1
1
/
Nipple, 19
/
L
8
4
3
1
/
Long Radius Elbow
8
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