Carrier 40RU User Manual
Page 17
17
Table 3 -- Fitting Requirement (cont)
UNIT
ACCESS
HOLE NO.
}
CONNECTION
TYPE
CIRCUIT
FITTINGS REQUIRED
†
(in.)
40RUS*14
40RUS*16
4
Supply
Lower
1
3
/
8
Long Radius Elbow
1
3
/
8
Nipple, 3
3
/
4
L
1
3
/
8
Long Radius Elbow
5
Return
Lower
1
3
/
8
Long Radius Elbow
1
3
/
8
Nipple, 3
3
/
8
L
1
3
/
8
Long Radius Elbow
6
Return
Upper
1
3
/
8
Long Radius Elbow
1
3
/
8
Nipple, 7 L
1
3
/
8
Long Radius Elbow
7
Supply
Upper
1
3
/
8
Long Radius Elbow
1
3
/
8
Nipple, 11
3
/
4
L
1
3
/
8
Long Radius Elbow
}
See Fig. 8 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 -- See Tables 1E and 1F for chilled
water connection sizes. For ease in brazing, it it
recommended that all internal solder joints be made
before unit is placed in final position.
Knockouts are provided in the unit corner posts for
40RUS refrigerant piping. Additional field--fabricated
access holes are required for 40RUS chilled water piping.
See Fig. 8, which lists recommended knockouts and
access holes to use for each 40RUS unit size.
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 40RUS 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.
C10690
Fig. 12 -- Typical 40RUS Chilled Water Piping
40RU