Carrier 09RH specifications Capacity Control Reduction Steps, Compr Contr, Model CYL

Table 16 — Capacity Control Reduction Steps

				CAP. STEPS (% Full Load Cap.)
		100	871/	831/	3	75	662/	3	621/	2	50	371/	331/	3	25
COMPR	CONTR		2									2
						% Full Load Bhp
MODEL	CYL
		100	90	86		80	74		71		60	50	45		38
				Number of Active Cylinders
5F20	1	2	—	—		—	—		—		1	—	—		—
5F30*	1	3	—	—		—	2		—		—	—	—		—
5F40	3	4	—	—		3	—		—		2	—	—		1
5F60	4	6	—	5		—	4		—		3	—	2		—
5H40	3	4	—	—		3	—		—		2	—	—		1
5H46	3	4	—	—		3	—		—		2	—	—		1
5H60	4	6	—	5		—	4		—		3	—	2		—
5H66	4	6	—	5		—	4		—		3	—	2		—
5H80	6	8	7	—		—	—		5		—	3	—		2
5H86	6	8	7	—		—	—		5		—	3	—		2
5H120	8	12	—	10		—	8		—		6	—	4		—
5H126	8	12	—	10		—	8		—		6	—	4		—

*Two controlled cylinders (to 331/3%) available on request for 5F30.

Principle of Operation of the System — An increase in suc- tion gas pressure, which requires increased compressor capacity, causes the needle valve to close. Therefore, lubrica- tion oil pressure in power element increases. Increased oil pressure in power element moves the power piston upward and the suction valve discs are allowed to seat.

Table 17 indicates control oil pressure at which controlled cylinders start to and completely unload.

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

UNIT

REDUCTION

SIZE

STEPS

L

1

U

5F40

2

U

U

L

5H40

3

L

5H46

1

U

L

2

U

U

L

3

L

1

U

L

5F60

2

U

L

5H60

3

U

U

L

5H66

4

L

5H80

1

U

L

5H86

2

U

L

3

U

U

L

4

L

L

1

U

2

U

L

5H120

3

U

U

L

4

L

5H126

1

U

L

2

U

L

3

U

U

L

4

L

0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

PSI DIFFERENTIAL

R-12, R-134a; 7-LB RANGE ADJUSTMENT SPRING

L - LOAD

R-22 & 502, R507/404A; 11-LB RANGE ADJUSTMENT SPRING

U - UNLOAD

Fig. 5 — Operating Sequence of Capacity Reduction Steps

Fig. 6 — Capacity Control — 5F20, 5F30

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