Carrier 39LD, 39LB, 39LA, 39LC, 39LE, 39LF, 39LH03-25, 39LG Chilled Water Coil Circuiting Data

Refrigerant Piping, Direct-Expansion (DX) Coils (Fig. 23) — Direct-expansion coils are divided into 2 or 4 splits depending upon the unit size and coil circuiting. See Table 7 for coil circuiting data. Each split requires its own distributor nozzle, expansion valve, and suction piping. Suction connections are on the air entering side when the coil is proper- ly installed. Matching distributor connections for each coil split are on the air leaving side. See unit label or certified drawing to assure connection to matching suction and liquid connections. See Table 8 for distributor part numbers.

Direct-expansion coils are shipped pressurized with dry air. Release pressure from each coil split through valves in protective caps before removing caps.

Do not leave piping open to the atmosphere unnecessar- ily. Water and water vapor are detrimental to the refrigerant system. Until the piping is complete, recap the system and charge with nitrogen at the end of each workday. Clean all piping connections before soldering joints.

The lower split of face split coils should be first on, last off.

Row split coils utilize special intertwined circuits (as shown in Fig. 23); either split of these row split coils can be first on, last off.

Fig. 23 — Typical Direct-Expansion

Row Split Coil

Table 4 — Hot Water Coil Circuiting Data

39L UNIT SIZE		03	06	08	10		12	15	18	21	25
						No. of Circuits
1-ROW	H	6	8	10	10		10	13	15	15	13
2-ROW	H	6	8	10	10		10	13	15	15	13
	F	12	16	20	20		20	26	30	30	36
LEGEND							NOTE: All hot water coils have 11/2-in. MPT.

F— Full Circuit H — Half Circuit

Table 5 — Chilled Water Coil Circuiting Data

LARGE FACE AREA (39LA, 39LD)

								UNIT SIZE
			03			06			08			10			12
COIL	CIRCUIT							Face Area (sq ft)
TYPE
			3.63			5.90			7.90			9.54			11.18
		No.		Connection	No.		Connection	No.		Connection	No.		Connection	No.		Connection
		Circuits		Size	Circuits		Size	Circuits		Size	Circuits		Size	Circuits		Size
	Q	4		11/2	5		11/2	—		—	—		—	—		—
4-ROW	H	8		11/2	10		11/2	12		11/2	12		11/2	12		11/2
	F	16		11/2	20		11/2	24		21/2	24		21/2	24		21/2
	D	—		—	—		—	—		—	—		—	—		—
6-ROW	H	8		11/2	10		11/2	12		11/2	12		11/2	12		11/2
	F	16		11/2	20		11/2	24		21/2	24		21/2	24		21/2
	D	—		—	—		—	36		21/2	36		21/2	36		21/2
				LARGE FACE AREA (39LA, 39LD)
							UNIT SIZE
			15			18			21			25
COIL	CIRCUIT						Face Area (sq ft)
TYPE
			14.91			17.71			21.60			25.00
		No.		Connection	No.		Connection	No.		Connection	No.		Connection
		Circuits		Size	Circuits		Size	Circuits		Size	Circuits		Size
	Q	—		—	—		—	—		—	—		—
4-ROW	H	16		11/2	19		11/2	19		11/2	22		11/2
	F	32		21/2	38		21/2	38		21/2	44		21/2
	D	—		—	—		—	76		21/2	88		21/2
6-ROW	H	16		11/2	19		11/2	19		11/2	—		—
	F	32		21/2	38		21/2	38		21/2	44		21/2
	D	48		21/2	57		21/2	57		21/2	66		21/2

LEGEND

D— Double Circuit F — Full Circuit H — Half Circuit Q — Quarter Circuit

NOTES:

1.Connection sizes are MPT — inches.

2.Sizes 21-25 have 2 coils.

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