Carrier 40RM007-034, 40RMQ008-028, 40RMS008-034 specifications Typical 40RMS Chilled Water Piping

Table 3 — Fitting Requirements (cont)

UNIT	ACCESS	CONNECTION	CIRCUIT	FITTINGS REQUIRED†
	HOLE NO.*	TYPE				(in.)
				21/ Long Radius Elbow
	5	Supply	Lower	21/	8	Nipple, 31/		L
					8		2
				21/ Long Radius Elbow
					8
				21/ Long Radius Elbow
	6	Return	Lower	21/	8	Nipple, 3 L
					8
40RMS				21/ Long Radius Elbow
					8
028, 034				21/	8	Long Radius Elbow
	7	Return	Upper	21/		Nipple, 67/		L
					8		8
				21/ Long Radius Elbow
					8
				21/ Long Radius Elbow
	8	Supply	Upper	21/	8	Nipple, 117/			L
					8			8
				21/ Long Radius Elbow
					8
				13/	8	Street Elbow
	1	Suction	Lower	13/		Nipple, 3 L
					8
				13/ Long Radius Elbow
					8
				5/	Street Elbow
	2	Liquid	Lower	8	Nipple, 73/		L
				5/
				8		4
				5/ Long Radius Elbow
40RM				8
				5/	Street Elbow
034
	3	Liquid	Upper	8	Nipple, 181/			L
				5/			2
				8
				5/ Long Radius Elbow
				8
				13/	8	Nipple, 43/	16		L
				13/ Long Radius Elbow
	4	Suction	Upper	13/	8	Nipple, 191/			L
					8			4
				13/ Long Radius Elbow
					8

*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 — See Tables 1C and 1F for 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.

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.

Fig. 12 — Typical 40RMS Chilled Water Piping

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