Mitsubishi Electronics MUY-GE15NA, MUY-GE18NA, MUZ-GE12NA, MUY-GE12NA, MUZ-GE15NA User Manual

...

SPLIT-TYPE AIR CONDITIONERS

OUTDOOR UNIT

SERVICE MANUAL

Models

MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUY-GE09NA MUY-GE12NA MUY-GE15NA

MUY-GE18NA

HFC

utilized

R410A

Indoor unit service manual

MSZ-GE•NA MSY-GE•NA Series (OBH548)

No. OBH549

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

CONTENTS

1. TECHNICAL CHANGES ··································· 2

2. PART NAMES AND FUNCTIONS ····················· 3

3. SPECIFICATION ················································ 4

4. OUTLINES AND DIMENSIONS ························ 7

5. WIRING DIAGRAM ············································ 8

6. REFRIGERANT SYSTEM DIAGRAM ··············11

7. DATA ································································ 13

8. ACTUA TOR CONTROL ··································· 22

9. SERVICE FUNCTIONS ··································· 23

10. TROUBLESHOOTING ····································· 23

11. DISASSEMBLY INSTRUCTIONS ···················· 40

PARTS CATALOG (OBB549)

MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA

1. New model

TECHNICAL CHANGES

PART NAMES AND FUNCTIONS

MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY-GE09NA MUY-GE12NA MUY-GE15NA

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

MUZ-GE18NA MUY-GE18NA

Air inlet

(back and side)

Piping

Drain hose

Air outlet

Drain outlet

Outdoor unit model MUZ-GE09NA MUY-GE09NA MUZ-GE12NA MUY-GE12NA

Capacity

Rated (Minimum~Maximum)

Capacity Heating 17

Power consumption

Rated (Minimum~Maximum)

Power consumption Heating 17 2 W 950 — 1,200 — EER HSPF IV 4 Heating 10.0 — 10.0 — COP Heating Power supply V , phase , Hz 208/230 , 1 , 60 Max. fuse size (time delay) A 15 Min. circuit ampacity A 12 12 12 12 Fan motor F.L.A 0.50

Compressor

Refrigerant control Linear expansion valve

Sound level

Defrost method Reverse cycle

Dimensions

Weight Ib. 66 77 External ﬁ nish Munsell 3Y 7.8/1.1 Remote controller Wireless type Control voltage Refrigerant piping Not supplied

Refrigerant pipe size (Min. wall thickness)

Connection method

Between the indoor & outdoor units

Refrigerant charge (R410A) 1 lb. 12 oz. 2 lb. 9 oz.

NOTE: Test conditions are based on ARI 210/240.

1: Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB) Rated frequency (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB Rated frequency 2: (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB Maximum frequency

SPECIFICATION

Cooling

Heating 47

Cooling 1 W Heating 47 1 W

[SEER] 3 Cooling 13.6 [ 21.0 ] 13.6 [ 21.0 ] 12.5 [ 20.5 ] 12.5 [ 20.5 ]

Model KNB073FQDHC

Refrigeration oil cc. (Model) 320 (NEO22)

Cooling dB(A) 46 46 49 49 Heating dB(A) 50 — 51 —

W in. 31-1/2 D in. 11-1/4 H in. 21-5/8

(by built-in transformer)

Liquid in. 1/4 (0.0315) Gas in. 3/8 (0.0315) Indoor Flared Outdoor Flared Height difference ft. 40 Piping length ft. 65

1 Btu/h

2 Btu/h 8,700 —

1 4.20 — 3.61 —

R.L.A 6.6 4.9 6.6 4.9 L.R.A 8.2 6.1 8.2 6.1

VDC 12 - 24

9,000

( 3,800 ~ 12,200 )

10,900

( 4,500 ~ 14,100 )

660 (205~1,200) 660 (205~1,200) 960 (205~1,300) 960 (205~1,300) 760 (255~1,200)

9,000

( 3,800 ~ 12,200 )

—

12,000

( 3,800 ~ 13,600 )

14,400

( 5,500 ~ 18,100 )

11,200

1,170 (340~1,660)

KNB092FQAHC

12,000

( 3,800 ~ 13,600 )

—

Outdoor unit model MUZ-GE15NA MUY-GE15NA MUZ-GE18NA MUY-GE18NA

Capacity

Rated (Minimum~Maximum)

Cooling 1 Btu/h

Heating 47

Capacity Heating 17

Power consumption

Rated (Minimum~Maximum)

Cooling 1 W Heating 47 1 W

Power consumption Heating 17

EER

[SEER] 3 Cooling 13.0 [ 21.0 ] 13.0 [ 21.0 ] 10.5 [19.2] 10.5 [19.2]

14,000

( 3,100 ~ 18,200 )

1 Btu/h

18,000

( 4,800 ~ 20,900 )

2 Btu/h 15,900 —

1,080 (160 ~ 2,000) 1,080 (160 ~ 2,000) 1,640 (240 ~ 2,070) 1,640 (240 ~ 2,070) 1,600 (270 ~ 2,010)

2 W 1,950 — 2,080 —

14,000

( 3,100 ~ 18,200 )

—

17,200

( 3,700 ~ 18,700 )

21,600

( 3,500 ~ 25,200 )

17,200

1,900 (230 ~ 2,680)

17,200

( 3,700 ~ 18,700 )

—

HSPF IV 4 Heating 10.0 — 10.0 — COP Heating

1 3.30 — 3.33 — Power supply V , phase , Hz 208/230 , 1 , 60 Max. fuse size (time delay) A 15 Min. circuit ampacity A 12 14 Fan motor F.L.A 0.50 0.93

Model SNB130FQBH

Compressor

R.L.A 7.4 6.8 10.0 10.0 L.R.A 9.3 8.5 12.5 12.5

Refrigeration oil cc. (Model) 450 (NEO22)

Refrigerant control Linear expansion valve

Sound level

Cooling dB(A) 49 49 54 54 Heating dB(A) 51 — 56 —

Defrost method Reverse cycle

W in. 31-1/2 33-1/16

Dimensions

D in. 11-1/4 13 H in. 21-5/8 33-7/16

Weight Ib. 80 119 External ﬁ nish Munsell 3Y 7.8/1.1 Remote controller Wireless type Control voltage

(by built-in transformer)

VDC 12 - 24

Refrigerant piping Not supplied

Refrigerant pipe size (Min. wall thickness)

Connection method

Between the indoor & outdoor units

Liquid in. 1/4 (0.0315) Gas in. 1/2 (0.0315) Indoor Flared Outdoor Flared Height difference ft. 40 50 Piping length ft. 65 100

Refrigerant charge (R410A) 2 lb. 9 oz. 3 lb. 7 oz.

NOTE: Test conditions are based on ARI 210/240.

Test condition

3, 4

Mode Test

ARI

"A-2" Cooling Steady State at rated compressor Speed

"B-2" Cooling Steady State at rated compressor Speed

SEER

(Cooling)

HSPF

(Heating)

(MUZ)

: At Intermediate compressor Speed

"B-1" Cooling Steady State at minimum compressor Speed

"F-1" Cooling Steady State at minimum compressor Speed

"E-V" Cooling Steady State at Intermediate compressor Speed

"H1-2" Heating Steady State at rated compressor Speed

"H3-2" Heating at rated compressor Speed

"H0-1" Heating Steady State at minimum compressor Speed

"H1-1" Heating Steady State at minimum compressor Speed

"H2-V" Heating at Intermediate compressor Speed 5

= ("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".

Indoor air condition (°F) Outdoor air condition (°F)

Dry bulb Wet bulb Dry bulb Wet bulb

80 67 95 (75)

80 67 82 (65)

80 67 67 (53.5)

80 67 87 (69)

70 60 47 43

70 60 17 15

70 60 62 56.5

70 60 47 43

70 60 35 33

3-1. OPERATING RANGE

(1) POWER SUPPLY

Outdoor unit

(2) OPERATION

Mode Condition

Standard temperature 80 67 95 —

Cooling

Heating

(MUZ)

Maximum temperature 90 73 115 — Minimum temperature 67 57 14 — Maximum humidity 78 % — Standard temperature 70 60 47 43 Maximum temperature 80 67 75 65 Minimum temperature 70 60 -4 -5

Rated voltage Guaranteed voltage (V)

208/230 V

1 phase

60 Hz

Min. 187

Indoor Outdoor

DB WB DB WB

208 230 Max. 253

Intake air temperature (°F)

OUTLINES AND DIMENSIONS

MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY-GE09NA MUY-GE12NA MUY-GE15NA

21-5/8

1-3/4

Air in

handle

11-1/32

7/8

13/32

15-3/4

Air in

11-29/32

5-15/16

Air out

19-11/16

31-1/2

Drain hole 1-5/8

1-9/16

2- 3/8 13/16 Oval hole

12 ~ 12-3/4

11/16

2-23/32

13-9/16

5-7/8

REQUIRED SPACE

4 i

or more

17/3229/32 11-1/4

Open two sides of left, right, or rear side.

Liquid pipe :1/4 (flared) Gas pipe :3/8 (flared) (GE09/12)

6-23/32

1/2 (flared) (GE15)

Unit: inch

Basically open 4 inch or more without any obstruction in front and on both sides of the unit.

4 in. or more

14 in. or more

8 in. or more

MUZ-GE18NA MUY-GE18NA

Drain 3 holes (ø1

-5/16)

Air in

33-7/16

11-25/32

2-19/32

20-9/32

Air out

4-25/32

Air in

1-11/32

19-11/16

33-1/16

1-9/16

4-3/8

13/16 slot

3-3/16

REQUIRED SPACE

4 in. or more

14-3/16

Open as a rule 20 inch or more if the back, both sides and top are open

Open as a rule 20 inch or more if the front and both sides are open

4 inch or more/ 8 inch or more if there are obstacles to both sides

14 in. or more

16-15/16

2-9/16

30°

35°

8-11/32

Liquid:1/4(flared) Gas :1/2(flared)

3-9/16

MUZ-GE09NA MUZ-GE12NA

WIRING DIAGRAM

MUY-GE09NA MUY-GE12NA

MUZ-GE15NA

MUY-GE15NA

MUZ-GE18NA

MUY-GE18NA

(

)

REFRIGERANT SYSTEM DIAGRAM

MUZ-GE09NA MUY-GE09NA

Refrigerant pipe ø3/8 (with heat insulator)

Stop valve (with service port)

Flared connection

Stop valve

Refrigerant pipe ø1/4 (with heat insulator)

(with strainar)

4-way valve

Muffler

Discharge temperature thermistor RT62

Service port

Capillary tube

O.D. 0.118 ×I.D. 0.079

× 9-7/16

(ø3.0 × ø2.0 × 240)

LEV

Muffler

Service port

Compressor

Defrost thermistor RT61 (MUZ)

Outdoor heat exchanger temperature

Outdoor heat exchanger

Refrigerant flow in cooling Refrigerant flow in heating

thermistor RT68

Ambient temperature thermistor RT65

Strainer #100

R.V. coil heating ON cooling OFF

(MUZ)

Unit: inch

(MUZ)

MUZ-GE12NA MUZ-GE15NA MUY-GE12NA MUY-GE15NA

Refrigerant pipe ø3/8 (GE12NA) Refrigerant pipe ø1/2 (GE15NA) (with heat insulator)

Stop valve (with service port)

Flared connection

Capillary tube

Flared connection

Refrigerant pipe ø1/4 (with heat insulator)

O.D. 0.118 ×I.D. 0.079

× 9-7/16

(ø3.0 × ø2.0 × 240)

Stop valve (with strainar)

Muffler

4-way valve

Discharge temperature thermistor RT62

Service port

Muffler

Service port

Compressor

Defrost thermistor RT61 (MUZ)

Capillary tube

O.D. 0.118× I.D. 0.071

× 23-5/8

3.0

× ø

(ø

LEV

1.8×600

Outdoor heat exchanger temperature

Outdoor heat exchanger

)

(×2)

Refrigerant flow in cooling Refri

erant flow in heating

thermistor RT68

Ambient temperature thermistor RT65

Strainer #100

R.V. coil heating ON cooling OFF

(MUZ)

Unit: inch

MUZ

MUZ-GE18NA MUY-GE18NA

(

)

Unit: inch

Refrigerant pipe ø1/2 (with heat insulator)

Flared connection

Refrigerant pipe ø1/4 (with heat insulator)

4-way valve

Stop valve (with service port)

Service port

Receiver

Stop valve (with strainar)

Muffler

#100

Service port

Discharge temperature thermistor RT62

Compressor

LEV

Strainer

#100

Capillary tube

O.D. 0.142 × I.D. 0.094

× 1-31/32

3.6

2.4×50

Outdoor

Defrost thermistor RT61

(MUZ)

Refrigerant flow in cooling Refrigerant flow in heating

heat exchanger

Outdoor heat exchanger temperature thermistor RT68

R.V. coil heating ON cooling OFF

(MUZ)

Ambient temperature thermistor RT65

(MUZ)

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Refrigerant piping: ft. Piping size O.D: in.

Model

MUZ-GE09/12/15NA MUY-GE09/12/15NA

MUZ-GE18NA MUY-GE18NA

Max. Length

Max. Height difference

65 40

100 50 1/2

Indoor unit

Max. Height

difference

Max. Length A

Outdoor unit

Gas Liquid

3/8 (GE09/12)

1/2 (GE15)

1/4

ADDITIONAL REFRIGERANT CHARGE (R410A: oz.)

Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.

Model

MUZ-GE09NA MUY-GE09NA

MUZ-GE12NA MUY-GE12NA

MUZ-GE15NA MUY-GE15NA

Outdoor unit

precharged

1 lb. 12 oz.

2 lb. 9 oz.

25 30 40 50 60 65

0 1.62 4.86 8.10 11.34 12.96

Refrigerant piping length (one way): ft.

Calculation: X oz. = 1.62/5 oz. / ft. × (Refrigerant piping length (ft.) - 25)

Model

MUZ-GE18NA MUY-GE18NA

Outdoor unit

precharged

3 lb. 7 oz. 0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20

25 30 40 50 60 70 80 90 100

Refrigerant piping length (one way): ft.

Calculation: X oz. = 1.08/5 oz. / ft. × (Refrigerant piping length (ft.) - 25)

NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.

7 DATA

7-1. PERFORMANCE DATA

1) COOLING CAPACITY

MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA

MUY-GE09NA MUY-GE12VA MUY-GE15VA MUY-GE18VA

Indoor air Outdoor intake air DB temperature (˚F)

Model

MUZ-GE09NA MUY-GE09NA

MUZ-GE12NA MUY-GE12NA

MUZ-GE15NA MUY-GE15NA

MUZ-GE18NA MUY-GE18NA

NOTE: 1. IWB: Intake air wet-bulb temperature

2. SHC is based on 80˚F of indoor Intake air DB temperature.

IWB (˚F)

71 11.0 7.6 0.59 10.3 7.1 0.64 9.7 6.6 0.69 9.0 6.2 0.73 8.3 5.7 0.76 67 10.4 8.6 0.55 9.7 8.0 0.61 9.0 7.4 0.66 8.4 6.9 0.70 7.7 6.3 0.73 63 9.8 9.4 0.53 9.1 8.7 0.58 8.5 8.1 0.63 7.7 7.3 0.67 7.0 6.7 0.70 71 14.7 8.9 0.85 13.7 8.3 0.94 12.9 7.8 1.01 12.0 7.3 1.06 11.0 6.7 1.10 67 13.9 10.3 0.81 13.0 9.6 0.89 12.0 8.9 0.96 11.2 8.3 1.02 10.3 7.6 1.07 63 13.1 11.4 0.77 12.1 10.6 0.85 11.3 9.9 0.92 10.3 9.0 0.98 9.4 8.2 1.02 71 17.2 11.4 0.96 16.0 10.7 1.05 15.1 10.0 1.13 14.0 9.3 1.19 12.9 8.6 1.24 67 16.2 13.0 0.91 15.1 12.1 1.00 14.0 11.2 1.08 13.0 10.4 1.14 12.0 9.6 1.20 63 15.3 14.2 0.86 14.1 13.2 0.96 13.2 12.3 1.03 12.0 11.2 1.10 10.9 10.2 1.14 71 21.1 12.2 1.46 19.7 11.4 1.60 18.5 10.7 1.72 17.2 9.9 1.81 15.8 9.1 1.89 67 20.0 14.2 1.38 18.6 13.2 1.52 17.2 12.2 1.64 16.0 11.4 1.74 14.7 10.4 1.82 63 18.7 15.8 1.31 17.4 14.7 1.45 16.2 13.6 1.57 14.7 12.4 1.67 13.4 11.3 1.74

TC: Total Capacity (×10 SHC: Sensible Heat Capacity (×10 TPC: Total Power Consumption (kW)

75 85 95 105 115

TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC

Btu/h)

2) COOLING CAPACITY CORRECTIONS

Refrigerant piping length (one way: ft.)

25 (std.) 40 65

MUZ-GE09NA MUY-GE09NA MUZ-GE12NA MUY-GE12NA MUZ-GE15NA

1.0 0.954 0.878

MUY-GE15NA MUZ-GE18NA MUY-GE18NA

3) HEATING CAPACITY (MUZ)

Indoor air Outdoor intake air WB temperature (˚F)

Model

IDB (˚F)

5 152535434555

TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC

75 4.8 0.45 6.3 0.57 7.9 0.67 9.4 0.74 10.6 0.78 11.0 0.79 12.4 0.82

MUZ-GE09NA

70 5.2 0.43 6.7 0.55 8.2 0.65 9.6 0.72 10.9 0.76 11.2 0.78 12.7 0.81 65 5.5 0.41 6.9 0.52 8.6 0.63 10.0 0.70 11.2 0.74 11.6 0.75 13.0 0.79 75 6.3 0.69 8.4 0.87 10.4 1.02 12.5 1.14 14.0 1.20 14.5 1.22 16.4 1.26

MUZ-GE12NA

70 6.8 0.66 8.9 0.84 10.8 1.00 12.7 1.11 14.4 1.17 14.8 1.19 16.8 1.24 65 7.2 0.63 9.1 0.81 11.3 0.97 13.2 1.08 14.8 1.14 15.3 1.16 17.1 1.22 75 7.9 0.63 10.4 0.79 13.1 0.93 1.56 1.03 17.6 1.09 18.1 1.10 20.5 1.14

MUZ-GE15NA

70 8.6 0.60 11.1 0.76 13.5 0.91 15.9 1.01 18.0 1.06 18.5 1.08 21.0 1.12 65 9.0 0.57 11.3 0.73 14.1 0.87 16.5 0.98 18.5 1.03 19.1 1.05 21.4 1.10 75 9.1 0.64 11.9 0.81 14.9 0.95 17.8 1.06 20.1 1.12 20.7 1.13 23.5 1.18

MUZ-GE18NA

70 9.8 0.62 12.7 0.78 15.5 0.93 18.2 1.04 20.6 1.09 21.2 1.11 24.0 1.16 65 10.3 0.59 13.0 0.75 16.2 0.90 18.8 1.01 21.2 1.06 21.8 1.08 24.5 1.13

NOTE: 1. IDB: Intake air dry-bulb temperature

TC: Total Capacity (x10

Btu/h)

TPC: Total Power Consumption (kW)

2. Above data is for heating operation without any frost.

How to operate with fixed operational frequency of the compressor.

1. Press the EMERGENCY OPERATION switch on the front of the indoor unit, and select either EMERGENCY COOL mode or EMERGENCY HEAT mode before starting to operate the air conditioner.

2. The compressor starts with operational frequency.

3. The fan speed of the indoor unit is High.

4. This operation continues for 30 minutes.

5. In order to release this operation, press the EMERGENCY OPERATION switch twice or once, or press any button on the remote controller.

7-2. PERFORMANCE CURVE Cooling

MUZ-GE09NA MUY-GE09NA

SHF at rating condition = 0.76

Ind

12 11

Btu/h)

Total capacity

(10

0.7

(kW)

0.6

0.5

Total power consumption

oor intake air WB temperature (°F)

9 8

Indoor intake air WB temperature (°F)

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

Airflow

= 307 CFM

71 67 63

MUZ-GE12NA MUY-GE12NA

SHF at rating condition = 0.73

15 14 13

Btu/h)

Total capacity

(10

1.2

1.1

1.0

(kW)

0.9

0.8

0.7

Total power consumption

Indoor intak

Indoor intake air WB temperature (°F)

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

= 350 CFM

Airflow

e air WB temperature (°F)

71 67 63

MUZ-GE15NA MUY-GE15NA

SHF at rating condition = 0.80

18 17 16 15

Btu/h)

Indoor intake air WB temperat

13 12

Total capacity

(10

1.3

1.2

1.1

(kW)

1.0

0.9

0.8

Total power consumption

Indoor intake air WB temperat

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

Airflow

= 498 CFM

ure (°F)

ure

(°F)

71 67

71 67 63

MUZ-GE18NA MUY-GE18NA

SHF at rating condition = 0.71

22 21 20 19 18

Btu/h)

Indoor intake air WB te

16 15

Total capacity

(10

1.9

1.8

1.7

1.6

(kW)

1.5

1.4

1.3

Total power consumption

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

Heating (MUZ)

MUZ-GE09NA MUZ-GE12NA

15 14 13 12

Btu/h)

11 10

Total capacity

(10

9 8 7 6

1.0

0.8

0.6

(kW)

0.4

Total power consumption

= 498 CFM

Airflow

rature (°F)

= 413 CFM

71 67

65 70 75

Total capacity

75 70 65

(°F)

Total power consumption

mperat

ure (°F)

mpe

Indoor intake air WB te

Airflow

intake air DB temperature (°F)

oor

Ind

Indoor intake air DB temperature

155253545556570

Outdoor intake air WB temperature (°F)

Btu/h)

(10

(kW)

= 413 CFM

Airflow

oor intake air DB temperature

Ind

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

Indoor

155253545556570

Outdoor intake air WB temperature (°F)

(°F)

perature (°F)

intake air DB tem

65 70 75

75 70 65

This value of frequency is not the same as the actual frequency in operating. Refer to 7-5 and 7-6 for the relationships between frequency and capacity.

MUZ-GE15NA

25 23 21 19

Btu/h)

17 15

Total capacity

(10

13 11

9 7

1.8

1.5

1.2

(kW)

0.9

Total power consumption

0.6

Indoor intak

155253545556570

= 463 CFM

Airflow

e air DB temperature (°F)

oor intake air DB temperature (°F)

Ind

Outdoor intake air WB temperature (°F)

MUZ-GE18NA

65 70 75

75 70 65

30 28 26 24

Btu/h)

22 20

Total capacity

(10

18 16 14 12

2.1

1.9

1.7

1.5

1.3

(kW)

1.1

0.9

0.7

Total power consumption

0.5

= 463 CFM

Airflow

e air DB temperature (°F)

Indoor intak

oor intake air DB temperature (°F)

Ind

155253545556570

Outdoor intake air WB temperature (°F)

65 70 75

75 70 65

This value of frequency is not the same as the actual frequency in operating. Refer to 7-5 and 7-6 for the relationships between frequency and capacity.

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