Bryant 619E manual Fitting Loss in Equivalent FT for Elbows, Chattleff Common Piston Sizes

APPLICATION DATA (cont)

3)For line lengths over 50 ft (018,024 only):

a)A crankcase heater should be added to scroll compressor units (all non-scroll compressor units have crankcase heaters as standard). Crankcase heaters help prevent refrigerant migration to the compressor during the off cycle.

b)Any time the equivalent line length is over 100 ft, a liquid line solenoid must be used. A liquid line solenoid may also be required for vertical lift ap- plications over 25 ft. See Step h) on page 22.

c)The accessory wind baf¯e is recommended.

d)The Effective Capacity Loss table on this page provides the estimated percentage of nominal cooling capacity losses based on the standard re- quired vapor line size versus what is selected for long-line applications.

Select the desired vapor line size from the Effec- tive Capacity Loss table based on equivalent ft and desired vapor line size.

Subtract the nominal percentage loss from the unit cooling capacities for the given indoor and outdoor combination.

FITTING LOSS IN EQUIVALENT FT FOR ELBOWS

TUBE SIZE	90-DEGREE	90-DEGREE	45-DEGREE
	SHORT	LONG	SHORT
O.D. (in.)
	RADIUS	RADIUS	RADIUS
5¤8	1.6	1.0	0.8
3¤4	1.8	1.2	0.9

CHATTLEFF COMMON PISTON SIZES

PISTON SIZE	PISTON SIZE	PISTON SIZE
32	53	80
33	55	81
35	57	82
36	59	84
37	61	86
38	62	88
39	63	89
40	65	90
41	67	92
42	68	93
43	70	96
45	71	98
47	73	101
49	74	104
51	76	Ð
52	78	Ð

COOLING ONLY SYSTEM PISTON GUIDE AND REFRIGERANT CHARGES

INDOOR	OUTDOOR			PISTON REQUIRED	CHARGE
UNIT	UNIT
				(Size)	(Lb)*
619E		538
009	C		009	None	1.5
012	C		012	None	1.8
018	A		018	49	4.6
024	A		024	57	5.3

*Charge based on 25 ft of interconnecting tubing. Charge may need to be added for longer tubing runs or when used with certain fan coils. Check unit nameplate for required charge.

NOTES:

1.All 018,024 pistons are Chattleff type.

2.All cooling units have a full factory charge.

3.Service valves are front-seating type.

HEAT PUMP SYSTEM PISTON GUIDE AND REFRIGERANT CHARGES

	UNIT		COOLING	HEATING	REQUIRED
Indoor		Outdoor	PISTON	PISTON	SYSTEM
619E		538D	SIZE	SIZE	CHARGE (Lb)*
009		009	30	32	1.5
012		012	42	42	2.0
018		018	51	47	5.0
024		024	49	52	5.1

*Charge based on 25 ft of interconnecting tubing. Charge may need to be added for longer tubing runs or when used with certain fan coils. Check unit nameplate for required charge.

NOTES:

1.All 009,012 pistons are Aeroquip type. All 018,024 pistons are Chattleff type.

2.The 538D heat pumps have a holding charge only as shipped from the factory.

EFFECTIVE CAPACITY LOSS

NOMINAL	STANDARD	LONG-LINE			PERCENT COOLING CAPACITY LOSS
UNIT SIZE*	VAPOR LINE (in.)	VAPOR LINE (in.)²	50 ft	75 ft	100 ft	125 ft	150 ft	175 ft	200 ft
18,000	5¤8	5¤8	1	3	4	5	7	9	10
	5¤8	3¤4	0	0	1	1	2	2	3
24,000	5¤8	5¤8	2	5	8	10	13	**	**
	5¤8	3¤4	0	0	1	2	3	4	5

*Nominal cooling capacity of the unit being speci®ed.

²The vapor line diameter that may be selected for long-line application. If smaller vapor lines than are speci®ed in the table are selected, a larger capacity loss will occur. If larger vapor lines are selected, refrigerant oil return will be impaired due to velocity loss.

**Not recommended due to excessive loss of capacity.

NOTE: Long-line applications (50 ft and longer) are not permitted on 009, 012 systems.

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