Carrier 5H User Manual

Carrier	Application Data
	Application Détail

CO

lO O

pa

'S ni

U

OQ 0) T3 O

U

CONTENTS
	PAGE
COMPRESSOR PHYSICAL DATA
CONDENSER PHYSICAL DATA
REFRIGERANT 12, 500, 22 AND 502 COMPRESSORS	4-20
Operating Requirements	4
Discharge Temperature	4
High Compression Ratio	4
Suction Gas Superheat	4
Keeping Liquid Refrigerant Out of the Compressor	5
Compressor Features and Accessories	7
Electrical Compensation of Compressor Capacity Control	15
Pneumatic Compensation of Compressor Capacity Control	15
Motor Selection Data	17
Motor Selection	18
Drive Packages	18
REFRIGERANT 12 AND 22 BOOSTER COMPRESSORS	21-29
Booster Application	21
Rating Basis	21
"R” Factors	21
Multi-Stage System Pointers	21
Safety Factors	26
Determining Intermediate Pressure	26
Gas Desuperheating	26
Liquid Cooling	26
Oil Separators and Lubrication	28
Control Pressurestat for Booster Application	28
Discharge Valve Springs	28
Water-Cooled Heads	28
Motor Selection Data	28
Compressor Starting Torque	29
Selection Procedure	29
CONDENSERS	30-31
Limitations	30
Condenser Duty	31
Pulldown	31
Fouling Factors	31
Water Circuiting Arrangements	31
Piping	31
Economics	31

S U P E R S E D E S
SECTION	5F,H-1X
PAGES	1-42
DATE	11-63	Carrier Corporation 1966	Tab 3

SECTION	5F,H-1XA
PAGE	1
DATE	10-66

Table 1 - Physical Data - R-12, R-500, R-22, R-502 Compressors

COMPRESSOR MODEL				5F20	5F30	5F40		5F60	5H40	5H46	5H60	5H80	5H120
			R-12	5	7-1/2	10		15	25	40	40	50	75
Nominal Horsepower			R-500	7-1/2	10	15		20	30	50	50	60	100
			R-22	10	15	20		25	40	60	60	75	125
			R-502	10	15	20		25	40	60	60	75	125
Number of Cylinders				2	3	4		6	4	4	6	8	12
Bore (in )				2-1/2	2-1/2	2-1/2		2-1/2	3-1/4	3-1/4	3-1/4	3-1/4	3-1/4
Stroke (in.)				2	2	2		2	2-3/4	3-7/16	2-3/4	2-3/4	2-3/4
Displacement Cfm at 1750 rpm				19.0	29 8	39.8		59.6	92.4	115.5	138.4	184 7	276 8
			R-12	5.18	7.76	10.5		15.7	24.7	30.6	37.0	49.4	74.0
Ratings in Tons			R-500	6 11	9.16	12.2		18.3	29.2	36.2	43.9	58.6	88.0
ARI Standard 516-60* and 514-62*			R-22	8 46	12.7	16.8		25.3	39.6	49.1	59.4	79.2	119.0
			R-502	8.85	13.2	177		26.5	40.5	50.2	60.9	81.2	122.0
	Single Stage		R-12, R-500	1750	1750	1750		1750	1750	1750	1750	1750	1750
Maximum Speed (rpm)			R-22, R-502	1750	1750	1750		1750	1750	1750	1750	1750	1750
	Booster		R-12	1750	1750	1750		1750	1750	1750	1750	1750	1750
			R-22	1750	1750	1750		1750	1750	1750	1750	1750	1750
Minimum Speed (rpm)	For Lubrication			400	400	400		400	400	400	400	400	400
	For Unloader Action			600	700	800		900	800	800	900	1100	900
Net Oil Pressure (psiq)i				45	45	45		45	45	45	45	45	45
Oil Charge (pt)				5	5-1/2	12		13	18	18	21	41	81
Normal Oil Level in Sight Glass				C.L.	C.L.	3/8" Above		3/8" Above	C.L.	C.L.	C.L.	C L.	C.L.
						C.L.		C.L.
Minimum Oil Pressure for Unloader Action (psig)				22	28	35		35	35	35	35	35	35
Suction Line ODF (in.)				1-1/8	1-5/8	1-5/8		2-1/8	2-5/8	2-5/8	3-1/8	3-5/8	4-1/8
Discharge Line ODF (in.)				7/8	1-3/8	1-3/8		1-5/8	2-1/8	2-1/8	2-5/8	3-1/8	3-5/8
Bare Compressor Weight (lb)				175	215	355		400	610	610	795	1115	1580
*Standard514-62 for 20hp and smaller; 516-60 for 25 hp and						tNet oil pressure			pressure gage reading — suction
larger. Group IV (40 F Sat. Suet, 105 F Sat. Disch, 15 F						pressure.
Superheat, OF Subcooling)

Table 2 - Physical Data - R-12, R-500, R22, R-502 Duplex Compressors

	DUPLEX COMPRESSOR MODEL		5H40-60	5H60-60	5H60-80	5H80-80	5H80-120	5H120-120
		R-12	60	75	100	100	125	150
	Nominal Horsepower	R-500	75	100	100	125	150	175
		R-22	100	125	150	150	200	250
		R-502	100	125	150	150	200	250
	Number of Cylinders		10	12	14	16	20	24
	Bore (in )		3-1/4	3-1/4	3-1/4	3-1/4	3-1/4	3-1/4
	Stroke (in )		2-3/4	2-3/4	2-3/4	2-3/4	2-3/4	2-3/4
	Displacement Cfm at 1750 rpm		230.8	276.8	323.1	369 4	461.5	553 6
		R-12	61.7	74.0	86.4	,98.8	123.4	148.0
	Ratings in Tons	R-500	73.1	87.8	102.5	117.2	146.6	176.0
	ARI Standard 516-60* and 514-62*	R-22	99 0	118 8	138.6	158.4	198.2	238.0
		R-502	101 4	121.8	142.1	162.4	203.2	244 0
	Oil Charge (pt)		39	42	62	82	122	162
	Duplex Unit Net Weight (lb)		2210	2410	2713	3225	3840	4305

*Standard 514-62 for 20 hp and smaller; 516-60 for 25 hp and larger. Group IV (40 F Sat. Suet, 105F Sat. Disch, 15 F Superheat, OF Subcooling)

SECTION	5F,H-1XA
PAGE	2
DATE	10-66	Printed in U.S.A.

S U P E R S E D E S SECTION 5F,H-1X PAGES 1-42 DATE 11-63

Table 3 - Physical Data - R-12, R-500, R-22, R-502 Condensei-s

CONDENSER SIZE						5F20		5F30	5F40	5F60	09RH027	09RH043	09RH054	09RH070	09RH084	09RH097	09RH127
Nominal Tonnage — (Note 1)						7 5	11 2		16 4	26 6	33 0	48 3	67 0	83 2	98 0	137 0	155.8
Condenser Type						4— She 11 a							11 and Tub
					DD (in.)	8-3/8	8-3/8		8-5/8	8-5/8	10-3/4	12-3/4	12-3/4	12-3/4	14	14	18
Shell
				Thickness (in )		.125	.125		277	277	.219	250	.250	250	.3125	.3125	.375
Overall Condenser Length (in )						28-5/8	39-5/8		63	74	77-1/8	79-1/4	95-1/4	95-1/4	99-3/8	123-1/8	100-1/2
Distance Between Tube Sheets (in.)						26-3/4	37-3/4		54	65	67-5/8	67-1/2	83-1/2	83-1/2	83-5/32	106-7/8	83
Tube Sheet Thickness (in.)						-	-		1-1/4	1-1/4	1-1/4	1-5/16	1-5/16	1-5/16	1-1/2	1-1/2	1-9/16
Coil Length (in.)						295-1/4	387-5/8		-	-	-	-	-	-	-	-	-
Tube Length (in.)						-	-		56-5/8	67-5/8	70-5/32	70-5/32	86-5/32	86-5/32	86-5/32	109-7/8	86-5/32
Tube Size (Finned) (in )						3/4	7/8		3/4	3/4	3/4	3/4	3/4	3/4	3/4	3/4	3/4
Number of Coi Is						2	2		-	-	-	-	-	-	-	-	-
Number of Tubes						-	-		32	40	61	89	89	n o	133	133	212
Number of Circuits						1 or 2		1 or 2	-	-	-	-	-	-	-	-	-
Number of Passes						-	-		4 or 8	4 or 8	3 or 6	3 or 6	3 or 6	3 or 6	3 or 6	3 or 6	3 or 6
				Single Circuit		49 2	64 6		-	-	-	-	-	-	-	-	-
Water Side				Double Circuit		24 6	32 3		-	-	-	-	-	-	-	-	-
Circuit Length — (ft)				4 or 3 Pass		-	-		18	21 6	17	16 9	20 9	20 9	20 8	26 7	20 8
				8 or 6 Poss		-	-		36	43 3	34	33 8	41 8	41 8	41 6	53 4	41 6
Woter Side Surface (sq ft)						8 6	13 4		20 5	30 7	48 8	70 8	87 7	108 4	130 3	165.2	207 7
Refrigerant Side Surface (sq ft)						43 6	65 8		66 4	99 5	158 0	229 0	284 0	352 0	422 5	536 3	672 4
Max Working Pressure					Refrig (psig)
					Water (psig)
Shell Volume					Gross (cu ft)	.67	99		1 59	1 92	3 29	4 6	5 7	5 7	6.8	8 7	11 2
					Net (cu ft)	.47	64		1 22	1 37	2 38	3 3	4.1	3 7	4.4	5.6	7 4
Maximum Refrigerant					R-12	40 4	50 7		79.4	89 6	154	212	263	238	282	358	475
Storage Copocity					R-22	37 2	46 4		72 8	82 0	139	193	239	216	257	327	432
					R-500	36 0	44 9		70 6	79 5	135	187	232	210	248	316	418
(lb) (Note 2)
					R-502	38 2	47 9		75 0	84 6	145	199	248	223	265	337	447
Minimum	Refrigerant				R-12	2 0	3 0		14.0	16 0	37	41	51	51	78	100	126
					R-22	1 8	2 7		12 7	14 5	33	37	46	46	71	91	114
Operating Charge
					R-500	1 8	2 7		12 4	14 2	32 4	36	■44 5	44 5	69	88 5	111
(lb)
					R-502	1 9	2 9		13 1	15 0	34 4	38 2	47 3	47 3	73	94	118
Net Weight (lb)						70	97		225	320	455	640	750	810	1055	1270	1500
		Single			Inlet	1/2 FPT		3/4 FPT	-	-	-	-	-	-	-	-	-
		Circuit
					Outlet	1/2 FPT		3/4 FPT	-	-	-	-	-	-	-	-	-
Water		Double			Inlet	(2)1/2 FPT		(2)3/4 FPT	-	-	-	-	-	-	-	-	-
		Circuit
					Outlet	(2) 1 MPT		(2) 1 MPT	-	-	-	-	-	-	-	-	_
Connections
		4 or 3			Inlet	-	-		(2) 1-1/4 FPT	(2) 1-1/4 FPT	(2) 2 FPT	(2)2 FPT	(2)2 FPT	(2)2 FPT	(2)2-1/2 IPS	(2) 2-1/2 IPS	(2) 3 IPS
(in.)
		Pass			Outlet	-	-		1-1/2 FPT	1-1/2 FPT	2-1/2 FPT	3 FPT	3 FPT	3 FPT	4 IPS	4 IPS	5 IPS
		8 or 6			Inlet	-	-		1-1/4 FPT	1-1/4 FPT	2 FPT	2 FPT	2 FPT	2 FPT	2-1/2 IPS	2-1/2 IPS	3 IPS
		Poss
					Outlet	-	-		1-1/4 FPT	1-1/4 FPT	2 FPT	2 FPT	2 FPT	2 FPT	2-1/2 IPS	2-1/2 IPS	3 IPS
Refrigerant		Gas Inlet (ODF)				1-1/8	1-3/8		1-3/8	1-5/8	2-1/8	2-5/8	3-1/8	3-1/8	3-1/8	3-5/8	3-5/8
		Conn Type
								older m	^-----------4-Bolt F
Connections
(in.)		Liquid Outlet (ODF)				1/2	1/2		7/8	1-1/8	1-3/8	1-3/8	1-5/8	1-5/8	2-1/8	2-1/8	2-1/8
		Conn Type
Frangible Disc (Male Flare) (in )						3/8	3/8		-	-	-	-	-	-	-	-	-
Relief Valve (Male Flare) (in )						-	-		1/2	1/2	5/8	5/8	5/8	5/8	3/4 FPT	3/4 FPT	(2)3/4 FPT
Water Drain and Vent Plug Size (in )						-	-		1/4	1/4	3/8	3/8	3/8	3/8	3/8	3/8	3/8
Water Reg Conn (Male Flare) (in )

NOTES:
1 Based on R-22	ot 105 F condensing, 85	F	ent	water	temp,	10	F	rise	per	ARI
Standard 450-61	(Group IV). The 09RH097	is	rated	at	10 6	F	rise	in	order	to

stay within the recommended water velocity range

2 90F liquid, 80% filled, per ARI Standord 450-61

3. Purge end liquid test cocks furnished on all condensers

4 5F40 and larger condensers have cleanable and renewable tubes.

S U P E R S E D E S SECTION 5F,H-1X PAGES 1-42 DATE 11-63

SECTION	5F ,H-1XA
PAGE	3
DATE	10-66

REFRIGERANT 12, 22, 500, AND

502 COMPRESSORS

Operating Requirements - Satisfactory operation of a reciprocating compressor is largely depend­ ent upon the recognition of these three fundamental requirements:

1.Prevention of excess discharge temperature

2.Adequate compressor lubrication

3.A clean and dry system

In order to simplify discharge temperature calculations, the preceding formula maybe stated in the following form:

T2 = [(460 + Tl) X C] - 460

Where:

T2 = Discharge temperature, F actual

Tl = Suction gas temperature, F actual (including superheat)

Discharge Temperature - The temperature at the discharge valves within the cylinders is the con­ trolling factor. Some cooling of the discharge gas

occurs before reaching the discharge stop valve, thus when water-cooled heads are used this cooling is greater than it is without water cooling. To pre­ vent the occurrence of excessive temperature at the discharge valves within the compressor, the following temperatures when measured imme­ diately following the discharge stop valve must never be exceeded.

For nonwater-coOled heads - 275 F max

For water-cooled heads - 250 F max

The approximate discharge gas temperature can be found by use of the following equation:

T2 =

Where:

	T2 ^		Discharge temperature, F absolute
			Suction temperature, F absolute
	Tl ^
			(including superheat)
	P2	^	Discharge pressure, psia
	Pi	^	Suction pressure, psia
			Compression exponent of the gas
	N
			(Table 4)
		Table 4 - Compression Exponent ”N'
	COMPRESSION				. WITHOUT			WITH
	RATIO =			WATER-COOLED				WATER-COOLED
	Discharge psia				HEADS			HEADS
	Suction psia			R-12,	:R-22	R-500	R-502	R-22
		2		1 216	,1 325	1 258	1 234	1 240
		3		1 191	1 258	1 216	1 216	1 218
		4		1 177	1.240	1 203	1 206	1 205
		5		1 172	.1.234	1.196	1 197	1 3 99
		6		1 166	1 232	1 191	1.190	1.196
		8		1.160	1.228	1.186	1.178	1 192
		10		1.155	1.225	1 182	1.169	1.187
		12		1 150	1.224	1 179	1 161	1 182

The value of the compression exponent (N) depends upon several factors such as - proper­ ties of the gas compressed, degree of cooling in the compressor jacket, leakages, etc.

0.

Values for C at various compression ratios are:

Table 5 - "C” Factors

COMPRESSION			WITHOUT			WITH
RATIO =		WATER-COOLED				WATER-COOLED
Discharge psia			HEADS			HEADS
Suction psia	R-12		R-22	R-500	R-502	R-22
2	1 14		1 17	1.16	1 13	1.15
3	1 19		1 25	1.22	1 22	1 22
4	1.23		1 31	1 26	1 27	1.27
5	1 26		1 36	1,30	1 30	1 31
6	1 29		1 40	T3 3	1 33	1 34
8	1 33		1.47	1:39	1.37	1 40
10	1.36		1 53	1 43	1 40	1 44
12	1 38		1 57	1 46	1 41	1 47

Example:

Refrigerant 12

Compression Ratio — “ °

Factor C = 1.33

Suction Temperature, Tl = 0 F Saturated,

Superheated to 65 F

Solution: '

T2 = [(460 + 65) X 1.33] - 460

=698 - 460

=238 F

Although exponents are shown for high com­ pression ratios, these are for information pur­ poses only. The rating tables define the allowable selection and operation limits.

High Compression Ratio - Avoid compressor op­ eration at compression ratios exceeding those covered in the rating tables. For operating condi­ tions outside the limits .shown in the tables, use two-stage compression. Care must be taken to prevent the compressor from pulling down to levels outside the rating tables.

Suction Gas Superheat - Excessive suction gas superheat will result in abnormally high discharge temperatures which must be avoided. When using Refrigerants 12, 500, and 502 the actual suction gas temperature must not exceed the values listed in Table 6. ,

SECTION	5F,H-1XA
PAGE	4
DATE	10-66	Printed in U.S.A.

S U P E R S E D E S SECTION 5F,H-1X PAGES 1-42 DATE 11-63

Table 6 - Actual Suction Gas Temperature Limits (F) Refrigerants 12, 500, and 502*

	SAT SUCTt		■60	-50	-40	-30	-20	-10
	GAS TEMP								0 and Above
	Actual	R-12	-	-	35	45	55	65	65
	Suction	R-500
	Gas Temp	R-502	25	35	45	55	65	75	75

*With Refrigerant 22 the suction gas superheat should never exceed 25 F for continuous operation.

tFor most saturated suction temperatures -10 F or below, coolers are required. See rating pages for specific informa­ tion.

Keeping Liquid Refrigerant Out of Compressor -

Liquid refrigerant, or even excessive amounts of entrained liquid particles, in the suction gas must be kept out of the compressor by proper system design and compressor control. Under running conditions, the presence of unevaporated liquid refrigerant in the compressor tends to break down the oil film on the cylinder walls resulting in increased wear and loss of machine capacity.

During compressor operation, proper adjust­ ment of the expansion valve will prevent excessive amounts of liquid from entering the compressor.

During compressor shutdown, gravity, thermal action and refrigerant absorption will result in a refrigerant and oil mixture in the compressor crankcase. Gravity flow can be prevented by the use of recommended loops, but thermal action and the absorption of refrigerant by the lubricating oil cannot be prevented by piping design.

For the above reason, the compressor must be controlled during idle times by one of the follow­ ing methods.

MINIMUM PROTECTION - The standard recom­ mended control method (see Fig. 1) is to close, by action of the control thermostat, the liquid line solenoid valve and simultaneously energize the crankcase heaters. With the crankcase heaters energized the crankcase temperature is always held above the shutdown temperature in the evap­ orator coil and there will be no refrigerant migra­ tion to the crankcase.

With this type control a control relay is re­ quired and the crankcase heaters have to be en­ ergized whenever the compressor is not operating.

The control relay coil is located in parallel with the liquid line solenoid and a normally open control relay contact added in series with the compressor starter and other auxiliary safety devices.

When the thermostat calls for cooling, solenoid valve opens and control relay is energized. This closes the relay contact and, if other safety devices are in their normal position, compressor willstart. Simultaneously the normally closed compressor auxiliary contact will open, removing the crank­ case heaters from the circuit.

When the thermostat is satisfied, the solenoid will close and the control relay is de-energized. This opens the relay contacts and the compressor stops. This action causes compressor auxiliary contacts to close energizing the crankcase heaters.

Specifications are sometimes written to call for a degree of protection greater than that afforded by standard method. If this is the case, either single pumpout or automatic pumpdown control may be required.

COMPR

AUX CONI

S U P E R S E D E S SECTION 5F,H-1X PAGES 1-42 DATE 11-63

CRANKCASE

HEATERS

Fig. 1 - Minimum Protection

SECTION	5F,H-1XA
PAGE	5
DATE	10-66

AUTOMATIC PUMPDOWN CONTROL (Fig. 2) - Pumpdown control is the most effective means of compressor control in keeping liquid refrigerant out of the crankcase on system shutdown.

In the basic pumpdown control sequence the thermostat controls the liquid line solenoid valve to stop or start the flow of refrigerant to the evap­ orator as required.

The pumpdown control system permits com­ pressor cycling if a system malfunction allows the low side pressure to rise. Although this cycling is sometimes considered objectionable by the cus­ tomer, it does promptly point out the need for maintenance attention and provides positive pro­ tection against liquid refrigerant accumulating in the compressor crankcase.

Pumpdown control should not be used with dry expansion coolers as it may cause frost pinching or freeze-up.

SINGLE PUMPOUT CONTROL - Pumpout control is not as positive as pumpdown control in keeping liquid refrigerant out of the crankcase. However, it is usually satisfactory when used with crankcase heaters if pumpdown is not acceptable.

Single pumpout control is similar to pumpdown control, except in the following ways: a pumpout relay is added, a normally open compressor auxil­ iary contact is necessary, and energizing of crank­ case heaters is definitely required at the end of each operating cycle.

With single pumpout control, when the thermo­ stat is satisfied, the compressor pumps down once and stops. It starts again only when the thermostat calls for cooling. In pumpdown control, the com­ pressor cycles solely on the low pressure switch, regardless of the demands of the thermostat.

Pumpout control should not be used with dry expansion coolers as it may cause frost pinching or freeze-up.

Fig. 2 - Automatic Pumpdown Control

Fig. 3 - Single Pumpout Control

SECTION	5F,H-1XA
PAGE	6
DATE	10-66

S U P E R S E D E S SECTION 5F,H-1X PAGES 1-42 DATE 11-63

MANUAL PUMP DOWN - The compressor maybe controlled manually without the use ofpumpdown, or single pumpout control, and without crankcase heaters, provided the system is at all times under the control of a qualified operator. The operator will pump down the system by use of the manual valves and will keep liquid, suction and discharge valves closed when the machine is not operating. This method of manual operation may be used for any system, but is particularly applicable to flooded systems. With flooded systems crankcase heaters are used for short "OFF" cycle periods; manual pumpdown is needed during extended compressor shutdown.

Compressot' Features and Accessories

WATER-COOLED HEADS AND OIL COOLERS - Water-cooled heads are available as accessories on all 5F,H compressors. Water cooling in cyl­ inder heads is not necessary for any R-12, R-500 or R-502 application within the range of the ratings shown in this publication. Water-cooled heads are required, however, and must be used for most R-22 applications where the compression ratio is greater than 5.

In many cases when the operating conditions are such that the suction gas becomes superheated and the compression ratio is high, it is required that an oil cooler be used on the compressor. This will insure cooler oil temperatures thereby increasing the life expectancy of the shaft seal. Oil cooler packages and modified bearing heads are available from the factory and are easily installed on all 5 Series compressors (except 5F20 and 30). The oil coolers are field mounted. The special bearing head is available for field installation or can be factory mounted on special order. Refer to 5F,H Application Ratings (5F,H-3XR) to find when oil coolers are required.

Water flow thru compressor heads and oil
cooler must be shut off when the compressor is
not running to prevent the refrigerant vapors from
condensing at the compressor during these OFF
cycles. For this purpose a solenoid valve is rec­
ommended in the water supply line to the com­
pressor heads.	•

The values listed in Table 7 assume a water temperature rise of 30 F. The oil cooler and water-cooled heads must be piped in series with the oil cooler first. Leaving water temperature should be between 100 F and 120 F, with 120 F being the maximum allowable temperature. The maximum working pressure for the water-cooled heads is 125 psi.

Table 7 - Minimum Gpm Required for Water-

Cooled Heads and/or Oil Cooler (Based on 30 F Rise)

COMPRESSOR	GPM
5F	2-3
5H (4, 6 and 8 Cylinders)	6
5H (12 Cylinders)	8

SAFETY RELIEF VALVES - All 5H compressors are equipped with built-in safety relief valves which are factory set to relieve from the discharge to the suction side of the compressor at a pressure differential of 350 psi.

Safety relief valves which relieve at a 400 psi pressure differential are factory-installed on the 5F60 compressor but are not available with the smaller 5F compressors.

SUCTION STRAINERS - Each 5F,H compressor is equipped with one or two suction strainers lo­ cated in the suction manifold. On new installations, felt filters should be used in the suction strainers to trap out foreign material left after Installation. After about 50 hours these felt filters must be removed. See the 5F,H Installation Manual for further details.

OIL SAFETY SWITCH - An oil safety switch is provided with all compressors except the 5F20 and 5F30. This switch is optional equipment on the 5F20 and 5F30 compressors. This switch will shut off the compressor before high oil tem­ peratures or lack of oil causes loss of oil pres­ sure which can result in compressor failure. As a safety feature, this switch must be reset manually after cutout.

S U P E R S E D E S SECTION 5F,H-1X PAGES 1-42 DATE 11-63

SECTION	5F,H-1XA
PAGE	7
DATE	10-66

OIL SEPARATORS - Oil separators in the hot gas discharge line are not recommended for gen­ eral use with Freon refrigerants. However, there are certain systems where the protection afforded by a separator is desirable, notably those systems employing flooded evaporators. For a more com­ plete discussion see Carrier's System Design Manual.

CRANKCASE OIL HEATERS-Crankcase oil heat­ ers are availablefor all 5F,Hcompressors.These heaters keep the crankcase warm during off cycles and thus minimize refrigerant absorption in the oil. Refer to the 5F,H Installation Manual for installation and wiring instructions.

INTERCONNECTION OF COMPRESSORS - All 5F,H compressors except 5F20 and SFSOarefurnished with removable handhole cover plates on each crankcase. When field interconnection is desired, these removable handhole cover plates can be removed and replaced by special cover plates with tapped openings. These tapped cover plates have connections for both oil and gas equal­ izing lines. For interconnection of the 5F20 and 5F30 compressors it is necessary to drill and tap the crankcase as shown in the 5F,H Installation Instruction Manual.

Because the 5F,H duplex units will usually be interconnected, these machines are equipped with tapped cover plates and interconnected at the factory.

Mufflers are not usually necessary with the smaller 5F compressors and their use is recom­ mended only when the application is critical with respect to quietness of operation.

Each piping package available to convert 5H compressor units to condensing units includes a standard muffler of the appropriate size.

Pressure drop thru these mufflers is about 1 /2 psi at 40 F suction and 105 F discharge with the following loadings; 5 tons with 5F20 muffler, 15 tons with 5F40 muffler, 35 tons with the 5H40 muffler, and 100 tons with the 5H120 muffler.

CAPACITY CONTROL - A cylinder unloading type of capacity control package is available for 5F20 and 5F30 compressor. It is standard equipment on the 5F40 and larger compressors.

The cylinder unloading mechanism is powered by the compressor force feed lubricating system. This feature assures unloading of all controlled cylinders at starting regardless of the position of the capacity control valve, since the suction valves will be held in the open position until the lubricating oil pressure reaches its normal op­ erating level.

VIBRATION ISOLATORS - A standard vibration isolation package is available for each 5F,H com­ pressor. This consists of a standard rubber in shear and compression type mounting which gives an average static deflection of approximately 1 /8 inch and provides reasonably good vibration isolation at 1750 rpm.

Isolation packages are recommended for use on all compressor and condensing units. They are valuable not only on upper floors in reducing vibration transfer to structure, but also when installed on cement floors they prevent misalign­ ment of the drive shaft due to pull down on an uneven floor.

When compressors are run at slower speeds or when superior isolation is desired, isolators are available on the market which give approximately 3/8 inch deflection. Table 8 indicates the estimated weight distribution, using a nominal horsepower motor, on each leg of the condenser or compres­ sor unit. For duplex units the weight is approxi­ mately the same on each leg.

MUFFLERS - Four standard mufflers cover the entire range of all 5F,H compressors. It is rec­ ommended that these mufflers be installed when­ ever compressors are used with remotely located water-cooled or evaporative condensers.

The compressors as furnished from the fac­ tory will have the capacity control arranged for capacity reduction in response to suction pres­ sure. An external adjusting stem is provided to set the control point and maintain the desired suc­ tion pressure. The control point is adjustable from 0 to 50 psig suction pressure. The differential over the complete range at any temperature level is 7 psig with Refrigerant 12 and Refrigerant 500. An 11-lb spring (for use on 5F40 and larger units) is furnished with the compressor which, when used, results in an adjustable control point from 0 to 85 psig with an 11 psig range. It should be inserted in the capacity control valve whenever R-22 or R-502 is used.

With this arrangement the suction pressure will not drop below the control set point minus the differential within the range of capacity steps since the compressor will unload to balance its capacity with the evaporator load.

The power elements and valve lifting mechan­ isms are identical on all 5F,H compressors. However, when using capacity control, various methods are used to activate the power elements.

See Table 10 for the unloading steps and power requirements at each step.

SECTION	5F,H-1XA
PAGE	8
DATE	10-66	Printed in U.S.A.

S U P E R S E D E S SECTION 5F,H-1X PAGES 1-42 DATE 11-63

Table 8 - Estimated Operating Weight Distribution

BELT DRIVE COMPRESSOR UNITS

	MODEL	1955 NEMA
		FRAME SIZE	A	В	C	D
	5F20	213, 215	90	100	100	140
		254U, 256U
	5F30	215, 254U	120	n o	125	160
		256U, 284U
		256U, 284U	135	140	150	200
	5F40	254U, 256U	200	155	175	255
		284U, 286U
	5F60	256U, 284U	250	205	215	310
		286U, 324U
		286U, 324U	300	270	275	330
	5H40	286U, 324U, 326U	395	300	310	425
		364U, 365U
	5H60	326U, 364U, 365U	470	385	405	560
		404U, 405U	495	515	550	765
	5H80	364U, 365U, 404U	575	555	560	795
		405U, 444U
	SHI 20	404U,405U, 444U	990	720	735	Ilio

DIRECT DRIVE COMPRESSOR UNITS

	MODEL	1955 NEMA
		FRAME SIZE	A	В	C	D
	5F40	254U, 256U	210	145	145	210
		284U, 286U
	5F60	256U, 284U, 286U	245	185	185	245
		324U, 326U
		286U, 324U, 326U	290	255	255	290
	5H40	286U, 324U, 326U	380	275	275	380
		364US,365US
		286U, 324U, 326U
	5H46	364US, 365US	380	275	275	380
		404US*, 405US*
	5H60	326U, 364US, 365US	480	360	360	480
		404US, 405US
		404US, 405US	575	480	480	575
	5H80	364US, 365US	690	605	605	690
		404US, 405US, 444US*
	5H120	404US, 405US	890	690	690	890
		444US, 445U5

*Requires 1-inch blocks under compressor to match motor shaft height.

BELT DRIVE CONDENSING UNITS

	COMPR	CONDENSER	A	В	C	D
	5F20	5F20	115	no	120	160
		5F30	125	120	130	170
	5F30	5F20	140	135	150	185
		5F30	150	140	155	190
		5F40	235	245	270	300
		5F30	250	210	230	310
	5F40	5F40	295	250	275	355
		5F60	. 315	275	295	375
	5F60	5F40	350	300	310	380
		5F60	390	340	350	421
		09RH027	470	445	450	505
		5F60	510	420	425	540
	5H40	09RH027	570	475	480	600
		09RH043	650	600	605	680
		09RH027	640	560	580	745
		09RH043	700	615	635	790
	5H60	09RH054	690	750	885	960
		09RH054*	785	805	840	1055
		09RH070	795	815	850	1065
		09RH084	885	905	940	1155
		09RH043	1005	800	805	1040
		09RH054	1045	845	850	1085
	5H80	09RH070	1055	855	860	1095
		09RH084	1145	940	945	1180
		09RH097	1115	1015	1020	1255
		09RH054	1280	1000	1015	1390
	5H120	09RH070	1295	1015	1030	1405
		09RH084	1370	1090	1105	1480
		09RH097	1435	1155	1170	1550

*With 60and 75-hp motors.

S U P E R S E D E S

SECTION 5F,H-1X

PAGES 1-42

DATE 11-63

DIRECT DRIVE CONDENSING UNITS

	COMPR	CONDENSER	A	В	C	D
	5F40	5F40	305	240	240	305
		5F60	325	265	265	325
	5F60	5F60	360	305	305	360
		09RH027	470	430	430	470
	5H40	09RH027	555	450	450	555
		09RH043	580	505	505	580
		09RH043	580	505	505	580
	5H46	09RH054	610	535	535	610
		09RH070	625	550	550	625
		09RH043	710	590	590	710
	5H60	09RH054	755	635	635	755
		09RH070	765	645	645	765
		09RH084	960	865	865	960
		09RH054	985	900	900	985
	5H80	09RH070	995	910	910	995
		09RH084	1080	995	995	1080
		09RH097	1150	1065	1065	1150
		09RH070	1280	1080	1080	1280
	5H120	09RH084	1340	1140	1140	1340
		09RH097	1385	1185	1185	1385
		09RH127	1535	1335	1335	1535

SECTION	5F,H-1XA
PAGE	9
DATE	10-66

5F20 And 5F30 (Fig. 4)

Major Elements of Control Systems:

1. Capacity Control Valve: The function of this valve is to raise or lower the oil pressure from the oil pump in response to the refrig­ erant suction pressure.

2. Power Element: The function of this element is to supply the power necessary to operate the valve lifting mechanism.

3. Valve Lifting Mechanism: This consists of a sleeve and push pin assembly around each controlled cylinder, designed to hold the suc­ tion valve open, or to permit the valve to re­ main in a normal operating position depending on its actuation by the power element.

Principle of Operation o/ihe System-An increase in suction gas pressure, which requires increased compressor capacity, causes the needle valve to close. Therefore, the lubrication oil pressure in the power element increases. The increased oil pressure in the power element moves the power piston upward and the suction valve discs are allowed to seat.

Table 9 indicates thé control oil pressure at which the controlled cylinders start to and completely unload.

The different points of control pressure on the 5F30 are obtained by using springs with different loading rates in the power element.

Table 9 - Initial and Final Unloading Oil

Pressui-es - 5F20, 5F30

			START TO	COMPLETELY
		CONTROLLED	UNLOAD	UNLOADED
	COMPR	CYLINDER	OIL PRESS.	OIL PRESS.
	5F20	1	19.8	13 0
	5F30	1	30.0	20.2
		2	198	13 0

5F40 Thru 5H80 (Fig. 5)

Major Elements of Capacity Control System:

1. Capacity Control Valve: The function of this valve is to raise or lower control oil pressure to the hydraulic relay piston in response to the refrigerant suction pressure. An increase in suction pressure increases the control oil pressure in the hydraulic relay.

2. Hydraulic Relay: The function of this relay is to feed the lubrication oil from the oil pump at full pressure in sequence to one or more power elements. This hydraulic relay is activated by the control oil pressure from the capacity control valve.

Power Element: This element supplies the power to operate the valve lifting mechanism.

4. Valve Lifting Mechanism: This consists of a sleeve and push pin assembly around each controlled cylinder, designed to hold the suc­ tion valve open, or to permit the valve to remain in a normal operating position depending on its actuation by the power element.

Principle of Operation of the System - A decrease in suction gas pressure, which necessitates a de­ crease in compressor capacity, causes the range spring to open the capacity control modulating valve. This allows the control oil to relieve from the hydraulic relay and thus reduces the control oil pressure in the relay. With reduced control oil pressure the spring in the hydraulic relay moves the piston and thus the lubrication oil from the oil pump is prevented from flowing to the particular deactivated power element. This relieves the oil pressure from the power element allowing the spring in the power element to move the lifting fork and unload the cylinder. An increase in suc­ tion pressure reverses the action and loads the cylinders.

5H120 Capacity Control (Fig. 6) - The 5H120 capacity control system is similar to that used on the 5F40 to 5H80 compressors. Unloaded starting and capacity reduction is obtained by holding open the suction valves of a number of the cylinders. For capacity control purposes,* a suction pressure activated capacity control valve pilots a hydraulic relay which loads or unloads the cylinders in pairs.

Major Difference from the 5F40 thru 5H80 Capacity Control:

1. The hydraulic relay design provides a wider pressure differential between cylinder cut-in and cutout points. This hydraulic relay is a small, easily removed cartridge rather than an integral part of the pump end cover.

2. The surge chamber on the 5H120 is an inte­ gral part of the bearing head casting.

SECTION	5F,H-1XA
PAGE	10
DATE	10-66	Printed in U.S.A.

S U P E R S E D E S SECTION 5F,H-1X PAGES 1-42 DATE 11-63