Carrier 51CM User Manual

51

HEATING & COOLING

Start-Up and Service Instructions

International Series

51CM,GM,ZM.CV,GY

CONTENTS

Page

START-UP ................................................................ 1

SERVICE . . 1
General Notes .. .1
Compressor Replacement 1

SAFETY REMINDERS............................................ 2-5

Preventive Maintenance 2

System Cleaning ... .2

System Flushing .... .2

Physical and Electrical Data
Compressors ... 4
Run Capacitors. .

Thermistors ... 4

Casing Dimensions .. .4
Capillary Data . 5
Capillary Insertion 5

DISASSEMBLY INFORMATION .... 6-17

Model 104's Casing .... 6

Models 304's/404's Casing ... 13

TROUBLESHOOTING GUIDE ... 18

START-UP

Refer to operating instructions in Owner’s Handbook

provided with room air conditioner

General Notes — These Start-Up and Service Instiac

tions are provided to assist the trained and qualified
service technician in repaii ing or replacing components of
Carrier room aii conditioner models produced in 1988,
specifically International Series models (51CM,GM,ZM
Cooling Only, 51CV,GY Cooling and Electiic Heat)
Other Carriei models for prior yeais have separate Start­Up and Service publications

IMPORTANT Repairing and servicing ah condi

tioners can be hazardous for untiained individuals

The insti actions printed in this publication are for

properly ttained and qualified Carrier service tech

nicians only

A WARNING

Befoi e working on any air conditioner, be sure to first
disconnect all electric power to the unit to avoid the
possibility of electiical shock and personal injury

...................................

.....................

SERVICE

3

4

1988 Room Air Conditioners

Discharge capacitors beiore disconnecting, by shorting

acioss terminals

Shield coils with cardboard to protect hands against
injury from sharp metal edges when removing compres­soi and other components

When disassembling wiring, use numbered stickers to
identify wiie leads and terminals This aids in quick,
accurate reassembly

Check clearances around scroll and housing before
installing fans Before securing fan setscrews, rotate fan
by hand to ensure ample clearance

Refer to Carriei Standard Service Techniques,
Chapters 1 and 2, for information on checking motors,
removing refrigerant, adding oil, evacuating, dehydrating
and charging system Pay particular attention to all saiety
warnings for these procedures

Compressor Replacement — Stand clem ofcom-

ptessoi tetminals when wotking on comptessors With

system imdef piesswe, terminals mar blow Observe
the same safety procedures for rotary compressors as
for reciprocating compressors

When changing compressors

1 Follow all safety codes Reminder use protective

goggles, work gloves and water-soaked quenching
cloth

Shut off electric power and remove wiring irom
compressor

Purge or remove all refrigerant and pressure from

system
Cut suction and discharge lines Use tubing cutter at

convenient location on tubing, near compressor, to
ease reassembly using copper slip couplings

Remove compressor from unit Protect compressor
irom heat and carefully unbraze piping stubs

A CAUTION

Oil vapor in piping stubs can ignite irom torch
flame and cause serious injury Exercise extreme
care when brazing, and keep brazingcloth and fire
extinguisher handy for emergency use

Install oil piping stubs on new compressor and care

fully braze into place

Clean system add or replace liquid line filter drier
Reiei to System Cleaning, and System Flushing

Install new compressor and braze into place with
field-supplied copper slip couplings

9

Connect wiring, replace wire terminals if necessary
Proceed with evacuation, charging and start-up

10

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations

Book 1 4

8a

Tab

10a

PC131 Catalog No 535-134 PrintedinUSA Form51-20SS Pgl 7-88 Replaces:New

For replacement Items use Carrier Specified Parts

It is much easiei to unsweat a short piece of tubing from
the compressor afte) you have removed the compressoi
irom the unit It follows that you can soldei the oil piping
stub into the new compressor fittings more easily befoie
the eompiessor is put back into the unit

If you choose a good tubing location for cutting the
refrigerant lines initially, the loeation is easily accessible
when making the final joints

SAFETY REMINDERS

1 Cany a file extinguishei in youi tiuck Keep it within

reach when using a torch Check fiie extinguisher
peiiodically to be suie it is fully loaded and iunctional.

2 Know how to handle oxyacetylene equipment safely

Lock the equipment in an upright position in the
truck and at the job site

3 Use dry nitrogen oi carbon dioxide to pressuiize the

system for leak checking Always use a good regulatoi
Be careful not to exceed 150 psig test pressure in the
heimetic eompiessor

4 Weal your safety goggles and gloves when lemoving

refiigeiant from a system

5 Attend your shop safety meetings

Preventive Maintenance

CLEANING — Clean cooling coil and condensei coil

Hold flashlight behind coil to see if all spaces are clear

Use a hooked wire to lemove dirt Dust accumulation
obstructs or reduces airflow and results in loss of capac­ity Coils may be vacuumed when diy Outdoois, unit can
be brushed with a stiff brush and fins blown out with

compressed aii

Thoroughly clean basepan, motors, fan wheels, other

components and all drain passages Vacuum insulation

Clean all inside painted surfaces with mineral spirits to

remove grease

Clean cabinet and grille Mild detergents reduce elec
trostatic charges on plastic sections of the grille and are
good cleaners Do no! use carbon tetrachloride, solvents

or waxes containing solvents to clean plastic sections

PAINTING — Paint any parts that show evidence of
rust with a good rust-resistant paint

WIRING — Check all wiring for deterioration and all

electrical contacts for tightness and lack of corrosion

LEAKS — Check any connections that show evidence of
oil or leaks When unit is property installed, centered and
leveled (see MOUNTING), check gaskets and wing
panels for possible air leakage

MOUNTING — Make sure unit is secure in window,
level from left to right, and from front to rear according
to installation instructions provided

If used, check compressor mounting springs and re
place if necessary Spt ings tend to lose their tension with
use This could lead to noisy operation

Check fans to ensure they are correctly positioned,
centered in orifice and tight on shaft

CONTROLS — Check unit to ensure all controls ate
functioning correctly and unit operation is normal

Vibrations can cause unwanted noise Check to be sure

no piping is vibrating against any side of unit

System Cleaning — A motor burnout is recognized
by the burnt odor of the refrigerant system When the
motor of a hermetically sealed compressor but ns out, the

insulation of the stator winding forms carbon, water and
acid After burnout, clean refrigerant circuit before a new
motor-compressor is installed installation of a new
capillary and strainer is also recommended when re

placing a compressor after burnout

The system is partially cleaned by back flushing with
relrigerant vapor blown into the suction line and out the
discharge just before connecting the new compressor If
this method is chosen, install a Sporlan C052S (Carrier
No KH41EZ246) lilter drier or equal in the liquid
line, using a capillary tube adapter (Carrier Part No
DEC3680001) An alternate and equally satisfactory
method follows under System Flushing

NOTE Damage to a new compressor caused by failure

to clean the system as recommended is not covered by
the product warranty

System Flushing — Flush with liquid R-22 refrig

erant before the suction line is connected to the new

compressor

1 Clean, flux and solder discharge line to new compressor

NOTE Compressor valves keep relrigerant from

backing out through compressor

2 Makeal/4-in connection to suction line Forexample

Use a 1/2-in x 1/4-in flare reducing coupling

and a/1/2-in. flare nut and tube (flared) and a

1/2-in sweat coupling||that connects to the system

1 /2-in. suction line. For other size suction lines use

proper size fittings to make the connection Connect

1 /4-in fitting to a refrigerant di urn by using chaiging

hose 01 1 /4-in tubing
Cut off the end of the pigtail on the discharge line

Flaie and install a I /4-in stop valve or (preferably) a

charging manifold

Invert drum and charge liquid refrigerant

Open discharge valve and allow to purge slowly until
liquid Freon comes, then close valve

6 Close valve on refrigerant drum and allow refrigerant

to remain in piping at least 15 minutes

7 Open valve on discharge stub and allow refrigerant to

blow out quickly Be careful not to stand in front of
valve when purging Protect hands from refrigerant
burns with cloth

8 Disconnect refrigerant drum and unsolder connection

to suction line

9 Proceed with remainder of installation

Table 2 — Physical and Electrical Data (Single Phase, 60 Hz) — 1988

MODEL 51

ZMA705101
ZMA705111
ZMA706101

ZMA706103
ZGA706103
ZMA007913
ZGAa07903
ZMA007703
ZMA008101
ZMA008103
ZGA008103
ZMA008703
ZMA009913
ZGA009903
ZMA009703
ZMA009303
ZMB009703

Table 1 — Unit Model Numbers (104, 304, 404)

CASING

104

MODEL 51

CMA109101
CMB112111
CMB112103
CMC012311
CMB012313
CMA012903
CMB012913
CGA012903
CMA012703
CVA212703
CMA115301
CMB115303
CMA118903
CGA118903
CMB118313
CMA118703
CMA115703

CASING

304

MODEL 51

GMA009101
G MA114101
GMA118301
GMA121301
GMA121311
GMA124301
GMA228301
G MA118703
GYA318703
GMA224703

CASING

404

Cool

5,200

7,600

8 800
12,000
12,000

9,000

Cool

12 000
18 000
18,000

CAPACITY

(Btuh)

‘Based on AHAM Standard RAC-1 and ANSI Z234 1
A t — Entering wet-bulb temperature minus leaving wet-bulb temperature based on 67 F room wet-bulb temperature and95F dry-bulb outside air temperature

CAPACITY

(Btuh)

MODEL

51

ZMA705101 5,200
ZMA705111

2MA706101 6,100
ZM,ZGA706103 6,100
ZMA008101 7,600
ZM,ZGA008103

ZMA009303

CMAiogioi

CMB112111

CMB,CGA112103

CMC012311

CMB012313

CMA115301

CGA.CMB115303 15,000/14,800

CMB118313

GMA009101

GMA114101 13,500
GMA118301 18 000/17 700 —

GMA121301 20,500/20 000 —

GMA121311 20,500/20,000 —

GMA124301 23,500/23,000 —

GMA228301 27,500/27,000

DOE — Department of Energy
EER — Energy Efficiency Ratio
FLA — Full Load Amps

Hp — Horsepower

PF — Power Factor

MODEL

51

ZMA007913 7,000
ZGA007903 7,000
ZMA007703 7,000/ 6,800
ZMA009913 9,000
ZGA009903 9,000
ZMA009703 9,000/ 8 750
ZMA008703
ZMB009703

CMA012903 12,000
CMA012703 12,000/11,900
CVA212703 12,000/11,900
CMA115703 15,000/14,800
CMA118703 18,000/17.800
CMA118903 18 000
CMB012913 12,000
CGA012903
CMB118913
CGA118903

G MA118703

GYA318703
GMA224703 24 000/23,500

9,000/ 8,900

11,800/11,700
11,800/11 700
15,000/14,800

18,000/17,800

8,000/ 7,775
8,500/ 8,250 --

18,000/17,500
18,000/17,500

R-22

CHG

Heat

—
—
—
—
—

----

-

—
—
—
—
—
—

—

—
—

—

If conditions vary, wet-bulb At will vary

•Heat

_
—
—
—
—
—
—

_
—
—
—
—
—
—
—
—
—

_

11,300/9,500

—

(oz ± 5 - 0)

155

15 5

15 0 12 1

150 12 1
18 0
18 0
20,0

23 0
30 0
30 0
32 0
32 0
38 0
38 0
32 0

27 0
27 0
40 0 12 1
44 0
39 0
39 0 15 8
40 0

R-22
CHG

{oz ± 5 - 0)

18 5
18 5

160 149

170

170
18 0
18 0

180

29 0 123
32 0 10 6
32 0
29 0
34 0
34 0
22 0 107
22 0 10 7
29 0

29.0 11.1
28 0

28 0 125
36 0 150

WET

BULB

(AtF)

98
98

15 5

155

16.5/16.4 230/208
96

11 2
11 2
109

109
13 1
13 1

14.0

65

86

14 5
14 5

187

VOLTS

115
115
115
115
115
115

115
115
115

230/208
230/208
230/208
230/208
230/208

115
115

230/208
230/208
230/208
230/208
230/208

Table 3 — Physical and Electrical Data (Single Phase, 50 Hz) — 1988

WET

BULB

(AtF)

159
159

21 0

21 0
20 2/20 0
20 2/20 0
20 2/20,0

10 6
10 8
12 9
13 2

11 1

12 5

VOLTS

200
200

240/220

200

200
240/220
240/220
240/220

200
240/220
240/220
240/220
240/220

200

200

200

200

200
240/220

240/220
240/220

Cool

56
56
63
63

81

8 1

4.2/ 4.6
86

120

120
5 9/62
5 9/62
7 5/79
7 5/79

9.2/10.2
7 2

120

8 7/95
10 3/11 0
10 3/11 0
11 3/12 0
15 2/16 0

Cool

44
44

3 8/40

56

56
4 5/47
4 5/47
4 5/47

62
5 6/60
5 6/60
7 8/82
9 5/99

11 9

70

70

11 0

11.0

10 4/110
10 4/11 0
13 7/14 7

NAMEPLATE*

Amps

Heat Cool

_

_

_

_
_

_

_
_

_

_

--

_
_

_

—

_

—

Amps

NAMEPLATE*

Heat Cool

_

_

—
_

_

—
—

-

_

_

_

_
_
_
_

_

15 1/14 0 2250/2190

—

580
580
665
665
845
845

900/ 890

930
1335
1335
1285
1285

1630/1610
1630/1610
2140/2120

750

1320

1950/1920
2220/2165
2220/2165
2550/2500
3350/3290

780
780

780/ 755

1000

1000
950/ 920
995/ 965
995/ 965

1265

1265/1250
1265/1250
1750/1730
2220/2200

2195

1275

1275

2115

2115

2250/2190
3000/2940

Watts

Watts

Heat

_

_

_
_
_
_

_
_

_
_
_

___
_

_
_

—

_
_
_

—

Heat

_

—

—

_

—

_

—

­_

_
_
_
_
_
_
_

_

3590/3050

—

FAN

OH

MO

FLA

93
93

93

93
93
93 91

.61

1 40
1 40
1 40

70

70
90
90

.90

1 11

3 10 98

1 00
1 11
1 11
1 60
1 60 Vi 96

FLA

44

44
41
44 89
44
41 'A ,
41

.41 'Ad

60
60
60 Vi;

1 00
1 00
1 60

60
60

1 60

1.60
1 10

1 10

1 50 Va

MO

FAN

TOR

Hp

'/l5
Vts

Vl5
Vl3

V,. 93

Vl2
Vl2

’/.2
V,2
’/l2

%
%
'A 98

V,0
’/6

'A
'A
%

Hp

V20
V20
V20

V.2
y,2

'A

%

'A

'/t2

'A
'A

'A
'A

PF

(%)

90
90
92
92

91

98
93
93

98
98
97
97

93
97

94
94
98

PF

(%)

89
89
86

89
88/89
92/93
92/93

92
96
96
95
97

97

82

82

96

96

90

90

91

EER

(DOE)

90
90
92

9 2

90
90

10.0
9 5 304

90 304
90

9 2/9 1
9 2/9 1 304 T-9
9 2/9 2
9 2/9 2 304 T-12

8.4/8.4 304 T-14
120

102

92
92
9 2
9 2

82

EER

(DOE)

90 Ml-1
90 Mt-1
90 T-4
90
90
80
80

8.0
95 T'11

95 T-10
96 T-10
80 T-13

8 1 304 T-15

82
94
94
85

8.5
80 T-5

80

80 T-9

CASING COMPR

104
104
104
104
104
104
104

304
304

304

404

CASING COMPR

104

404 T-5

___

T-1
T-1
T-2
T-2
T-3
T-3

T-5

T-7
T-8
T-8
T-9

T-12

T-17
H-1
MA-1
T-14
MA-2
T-22
T-23

MI-2
MI-2
T-6
T-6
T-6

T-16
MI-3
Ml-3
MI-4
MI-4

CAPILLARY

Data

C-1
C-1
C-2
C-2 CM
C-3
C-3
C--4

__

C-8
C-9
C-9
C-19
C-19
C-7
C-7
C-11

C-10
C-13
C-14
C-15
C-15
C-20
C-16

Data Insertion

C-5
C-5
C-4
C-6
C-6
C-6
C-6

____

______
C-9
C-10
C-10
C-7
C-11
C-11

C-12

e-12
c-11
c-11

c-17
c-17 CI-3
c-18

Insertion

CI-2

CI-3

CI-1

CI-2

START

THERMISTOR

Z-1

Z-1

START

THERMISTOR

Z-1

Z-1

z-1

DOE ~ Department of Energy
EER — Energy Efficiency Ratio
FLA — Full Load Amps
Hp — Horsepower
PF — Power Factor

‘Based on AHAM Standard RAC-1 and ANSI Z234 1

A t — Entering wet-bulb temperature minus leaving wet-bulb temperature based on 67 F room wet-bulb temperature and95 Fdry-bulboutsideairtemperature

If conditions vary, wet-bulb At will vary

Table 4 — Compressors

KEY NO

Matsushita
MA-1

MA-2
Mitsubishi
MI-1

MI-2
MI-3
MI-4

Tecumseh

H-1
Toshiba
T-1

T-2
T-3
T-4
T-5
T-6
T-7
T-8
T-9
T-10
T-11
T-12
T-13
T-14
T-15
T-16
T-17
T-18
T-19
T-20
T-21
T-22
T-23
T-24
T-25

VENDOR MODEL

NO

2K25S3R236A-6A
2K32S3R236A-6A

RH421SS
RH427SS
RH434SS
NH455NB

RK5513E

ERH62XA3-1K
ERH68XA3-1K
EH88X1-1CU1
PRH94XA4-4K
PRH88XA4-3K
PH112X2-4KU

ERH88XA4-1K
EH120X2-1KU
PH120X2-3KU
PH142X2-4KU
PH142X2-9LU
PH160X2-3LU1
PH180X2-4LU
PH210X3-3LU
PH250X3-4LU
PH250X3-9LU
EH80X1-1CUI
PH200X33-3LTU
PH230X3J-3LTU

PH230X3J-4LTU

PH230X3-4LU
PH250X3-3LU
PH310X3-3MU
PH310X3J-4MTU

PH310X3-4MU

OiL CHARGE (02 ± 1)

Dry

14 5
14 5

10 1
19 2

180

28 7

Recharge

17 3
16 2
25 8

11 8

7 4
7 4
7 4

74
7 4

11 0

7 4

10 6

106
11 0
11 0
14 0

140
20 3
20 3
20 3

74
20 3
20 3
20 3
20 3
20 3
23 7
23 7
23 7

18 3
18 3
18 3

18 3
18 3

21 3
21 3
21 3

\ir\\ TC

125
125

9 1

9 1

67
67
67

6 7

67

9 9 240/220

67
95
95
99

99
126
126

67
183

18 3
183

230/208
230/208

200
200
200
200

115 11 4

115
115

115
240/220
230/208

115 7 7

115
230/208
240/220

200
230/208
240/220
230/208
240/220

200

115
230/208
230/208
240/220
240/220
230/208
230/208
240/220
240/220

RLA LRA

74 42 0
96 52 0

FLA

4 5

56 30 0
73 38 0
97

26 0

47 0

67 0

52 35 0

59 35 0
75

34 20 0
39 25 0
40 23 0

11 6

54
45 26 0
52 27 0
68 38 0
69 36 0

9 1

88

10 2 51 0

—

—

20 0 79 0

—
—

—

—

-

—

41 0

43 0
63 0
33 0

49 0
46 0

41 0
65 0

58 0
46 0
63 0
79 0
83 0
72 0

RUN

CAPACITOR

RC-4
RC-6

RC-12
RC-8
RC-8
RC-7

RC-9

RC-3
RC-3
RC-3
RC-1
RC-1
RC-2
RC-2
RC-5
RC-2
RC-2
RC-2
RC-4
RC-4
RC-6
RC-6
RC-6
RC-9
RC-6
RC-6
RC-6
RC-6
RC-6
RC-6
RC-10
RC-11

FLA “ Full Load Amps
LRA — Locked Rotor Amps
RLA — Rated Load Amps

Table 5 — Run Capacitors

KEY NO

RC-1

RC-2

RC-3
RC-4
RC-5
RC-6
RC-7

RC-8
RC-9

RC-10

RC-11

RC-12

MFD — Microfarad

CARRIER NO

HC98CA016
HC98CA026
HC98CA027
HC98CA036

HC98CA031

HC98CA046
HC98CA050
HC98DA031
HC98CA028
HC98CA062
HC98CA047
HC98DA026

MFD

15/5
25/5

25/7 5 370

35/5
30/5
45/5

50/5

30/5
25/10
60/7 5
45/7 5

25/5

VOLTS

370
370

370

370;
370
370
440
370
370
370
440

Table 6 — Thermistor

KEY NO

Z-1

CARRIER NO

HC95XX006 3M305C20C

VENDOR NO

Table 7 — Casing Dimensions (in.)

CASING

104
304
404

HEIGHT

UVe 20 Vm 17'/e

15S/t6 24Vm

173/i6

WIDTH

26

RESISTANCE

(Ohms)

25

DEPTH

27¥^6

28Vi6

Table 8 — Capillary Data

Table 9 — Capillary Insertion

KEY NO

C-1

C-2 106 055
C-3 106 055
C-4
C-5

C-6(2)

C-7 125 070

C-8
C-9 125 064

C-10 125

C-11

C-12 125
C-13
C-14

C-15(2)

C-16

C-16(2) 106 054

C-16

C-17 (2)

(Injection)

C-18 (2)

(injection)

C-19

C-20 (2)

OD

(± 002)

106 049

106 054
106
106

125 054

125 070
125

125 070
125 054
106 054

106 054
125
080 031
125 070
080 031

125 064
125 064

DIMENSIONS (in.

ID

(± 0003)

049
049

064
064

070

070

Length

(± 25)

30
39
38
42
26
66
34
25
25
35
22
26
26
24

16
46
34
56
36
36
31
18

30
25

NOTE Capillary number follows key number Numbercapillaries
from left to right, facing evaporator inlet, when more than one is
used

KEY NO

CI-1

C1-2

CI-3

DEPTH (In.)

Cond Coil Evap Coil

Conn Tube

(Max) (Min)

Conn Tube

Va

1

Va

1
1

DISASSEMBLY INFORMATION

Model 104's Casing

Model 51ZM — The Model 5IZM Room Air Condi-

tioner is leieiied to as the 104 size casing International
Series unit See Fig 1

Fig. 1 — Model 51ZM

1 Grille — Decorative iiont grille insert is removed by

giipping top of insert and pulling outward while lift
ing insert from grille frame See Fig 2

Fig. 3 — Removing Filter

Fig. 2 — Removing Grille Insert

Filter — Filter can be removed without having to

remove grille insert Grasp bottom edge of filter
(located behind grille insert) and gently pull filter
down and slightly toward you See Fig 3 Filter may
be vacuumed, or washed in warm water Shake filter
to remove excess water, dry thoroughly and replace
by sliding filter upward behind front grille until filter
snaps in place

Grille Frame — Grille frame is removed by first
removing 4 screws holding frame to chassis See
Fig 4 Pull top of grille frame outward and lift frame

away from chassis

Fig 4 — Removing Grille Frame Screws

Chassis Security Lock Screw — To slide

chassis out of casing, security screw must first be
loosened Loosen screw and slide screw to unlock
position (forward) When reinstalling chassis in
casing, reverse procedure and tighten screw in lock
position See Fig 5

Chassis — The International Series models have

a slide-out chassis Servicing the chassis is possible
without having to remove rrnit casing from window
See Fig 6 Use the offset in the basepan as a finger­grip handle to slide chassis out of casing

A CAUTION

Coil fins are sharp Use care when removing
chassis from casing to avoid personal injury Do
not use plastic parts for lilting or pulling They
are not structural members of the chassis Lift
using basepan only Chassis is heavy Obtain
assistance for lifting

EVAPORATOR
COVER SCREWS (5)

Fig 5 — Unlocking Chassis Security Lock Screw

Fig 6 — Sliding Chassis Out of Casing

Fig. 7 — Evaporator Cover Screws

6 Evaporator Cover — Remove evaporator by

removing 5 sciews as shown in Fig 7

7 Control Box — Conti ol Box is secured with 2

sciews See Fig 8
a Remove sensing bulb from coil See Fig 9
b Remove service cord screw See Fig 9
c Remove control knobs by pulling off See Fig 10
d Remove escutcheon plate

8 Timer — See location of timer in Fig 11

a Remove 2 screws holding timer to control box

b Caiefully pull wires fiom timer terminals being

sure to label or mark each wire for accurate wire

replacement on timer

c To reinstall timei. reverse above procedure

Fig 8 — Control Box Screws

9 Cool-Heat Control — See Cool-Heat Control

location in Fig 11

a Remove 2 sciews holding Cool-Heat Control to

control box

b Carefully pull wires from Cool-Heat Control ter

minals being sure to label or mark each wire for
accurate wire replacement

c Reverse above procedure to reinstall Cool-Heat

Control

10 Fan Cycle Switch — See Fan Cycle Switch loca

tion in Fig 11

a Remove fan cycle switch using screwdriver as

shown in Fig 11