Carrier 26H User Manual

Download

Page 1

»o cs

26H

i < si

3 u < “

Automatic Icemaker

Dimension Drawings

page 3

page 7

INSTALLATION

AND

SERVICE

INFORMATION

Installation Instructions

Service Instructions page 19

Page 2

-m

Carrier

CARRIER AUTOMATIC ICEMAKER

SPECIFICATIONS_______________________

DIMENSION DRAWINGS INSTALLATION

____-____

_____________

_______________________________________

1. Check Shipment

2. Select Proper Location

3. Move Unit to Location

4. Uncrate the Bin

5. Install Leveling Screv/s

6. Unpack and Mount the Heat Interchanger

7. Move the Bin to Approximate Location....................................

8. Uncrate the Machine Section

9. Remove the Front, Top and Side Panels

10. Plage Machine Section on Top of Bin and Bolt in Position...

I I. Bolt Tie Bar at Rear of Unit................ ...........................................................12

12. Install Water Supply and Drains

13. Make Electrical Connections

14. Install Bin Thermostat Bulb..................................................................

15. Remove the Ice Deflector

16. Install Siphon Standpipe and Adjust Float

17. Replace the Ice Deflector

18. Loosen Compressor Hold Down Bolts

19. Start the Unit

20. Check Operation.................................................................................... 17

21. Final Check List

SERVICE

SERVICE PARTS

___

_______________________________________________________19-61

1. How the Automatic Ice Maker Works

2. Refrigerant Circuit.......................................................................................

3. Freezing Water Circuit

4. Electrical Circuit...........................................................................................

5. Ice Maker Service Checklist

6. Service Analysis 26H5 and 26H3

7. 26H Icemaker Rating Tables

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

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

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

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

______________________________

- --...................................................................

.........

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

...............................................................................10

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

.......

______

.......

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

..........

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

.........

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

......................................................................... 14

.....

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

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

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

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

_____________ ____________

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

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

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

.....

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

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

.........

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

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

____

______

___

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

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

.........

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

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

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

.........

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

.....

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

___________________

___

__________ 9-i8

...........

................... 9

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

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

.......

.....

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

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

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

_____

..........

....

......

....

.....

.......

.. II

......

.......

......

26H

PAGES

3-6

7,8

.. 10

10 11

...II

14 15

.19

36 40

.60

63-64

All specifications, descriptions, detail drawings, etc. subject to change without notice or incurring obligation.

1st Printing 7-15-57 5M 1st Reprint 5-15-58 2M

LItho in U.S.A

26H-57PD

Page 3

Carrier^

Automatic Icemaker 26H3

An automatic, low-cost ICE PLANT .

* Produces a continuous supply of ice, cubed or

crushed, automatically.

* Cubes are crystal clear, sanitary . . . untouched

by human hands. Cube's unique shape provides larger cooling surface.

* Crushed ice delivered in three grades ... to meet

all your sized-ice needs.

* Easily, quickly installed. Requires only standard

electrical and water connections.

* Re-location a simple matter. Just disconnect

water and electricity . . . reinstall in new location.

right in your PLACE of BUSINESS!

* Compact cabinet occupies only 4 sq. ft. floor

area. * Exterior styled to blend with finest surroundings.

Finished in sea spray green or white, stainless

steel trim.

* Minimum maintenance, maximum quietness . . .

simplified, unique mechanism delivers individually

formed cubes.

* Starts with simple on-off switch. Machine stops

automatically when bin is full, resumes operation as soon as few cubes are removed.

* Low operating cost . . . efficient, quiet refrigera

tion cycle uses small amounts of water and power.

• Underwriters approved.

26H-57PD

Page 4

26H3

SPECIFICATIONS

Carrier

IDEAL for RESTAURANTS, HOTELS, MOTELS, BARS,

TAVERNS, CLUBS, HOSPITALS, DRUG STORES . . .

wherever a continuous supply of clear, sanitary ice, cubed or crushed, is a tangible business asset. The Carrier Icemaker freezes and delivers up to 200 pounds

of ice per day, at 90° ambient air and 70° entering

water. Quietly, without complicated cutting or chop

ping mechanism, it provides hard, sparkling cubes or varied grades of crushed ice. The cube, too, is designed for highest efficiency ... its unique shape provides more-than-ordinary cooling surface.

COMPACT, ATTRACTIVE CABINET . . . takes up

only 4 square feet of floor area. Smart, modern design,

featuring rounded corners, o bonder!zed, boked-on sea spray green or white finish, richly trimmed in stainless steel and chrome . . . complements any

and all furnishings.

ICE CRUSHER. Entirely automatic, electric-motor

driven unit. Delivers crushed ice in three grades —coarse, medium, or fine. User sets one control knob to "crushed" and the other to grade as dictated by needs.

REMOVABLE PANELS provide easy access to working

parts. Access for all normal service through removable front panel.

WELDED-TYPE HERMETIC COMPRESSOR. Quiet,

efficient, permanently oiled and vibrationless. Designed for long life and trouble-free operation.

EXCLUSIVE DESIGN ICE-MAKING SYSTEM. NO

MOVING PARTS. Freezing coils are soldered to copper bands and attached, at 8 different points, to each of 13 stainless steel freezing tubes. In operation, ice builds up on inside wall of tube at these 8 separate points to form 8 cubes in each tube. Freezing completed, automatic controls reverse cycle, releasing cubes which simply "gravity drop" into bin or crusher, as “dialed" by user.

COMPLETELY AUTOMATIC. A simple rotary switch

starts the machine, from then on it produces ice auto matically. When storage bin fills with cubes, or crushed ice, the machine shuts off automatically, starting again

whenever some ice is used.

STORAGE BIN (bottom section) available in four

sizes — TOO, 160, 240 and 500 pounds capacity. It

has baked-on finish, stainless steel liner and 2 in

ches of insulation on sides. Partition separates

cubes and crushed ice.

SIPHON-INTERCHANGER. Automatically replaces

the water in the Icemaker system at the end of each freezing cycle. Pure, crystal clear ice is assured, even in

hard water areas, with a minimum of cleaning and maxi

mum productive capacity.

MECHANICAL SPECIFICATIONS

COMPRESSOR: '/2 horsepower, single cylinder,

welded-type, hermetic compressor, driven by a capaci tor-start, induction-run motor.

CONDENSER: Water-cooled, shell and finned copper

coil type.

REFRIGERANT: Safe, non-toxic, non-inflammable

FREON-12.

REFRIGERANT CONTROL: Single capillary tube . . .

no moving parts.

WATER PUMP: Stainless steel shaft, brass impeller

and brass housing. Directly connected to a shaded pole, totally enclosed, thermally protected motor.

POWER CONSUMPTION: 575 watts during freezing.

SWITCH: 3-position rotary ... for manual starting

and stopping, or tor operating of water pump for

cleaning.

CURRENT: 115 volt, 60 cycle, single phase, alternat

ing current.

WATER CONSUMPTION: During freezing, 10 to 42

gallons per hour, depending upon supply water tem peratures.

DIMENSIONS: 69 inches high, 25 inches deep. Width

is 24 inches with 100 pound storage.

26H3 ICEMAKER WEIGHTS:

Machine section, 100 lb. bin, no crusher, crated 348 Machine section, 100 lb. bin, no crusher, uncrated 305 Ma?hine section, 100 lb. bin, with crusher, crated 388 Machine section, 100 lb. bin, with crusher, uncrated 345 Machine section, 160 lb. bin, no crusher, crated 371 Machine section, 160 lb. bin, no crusher, uncrated 326 Machine section, 160 1b. bin, with crusher, crated 411 Machine section, 160 1b. bin, with crusher, uncrated 366 Machine section, 240 lb. bin, no crusher, crated 405 Machine section, 240 lb. bin, no crusher, uncrated 357 Machine section, 240 lb. bin, with crusher, crated 445 .Machine section, 240 lb. bin, with crusher, uncrated 397

ICE CRUSHER: Cast al uminum rotor, stainless steel

picks, sleeve bearings, belt-driven by a 1/6 horsepower, drip-proof, thermally protected motor, with adjustable drive-pulley.

Lbs.

26H-57PD

ÉM

Page 5

Automatic Icemaker 26H5

An automatic, low-cost ICE PLANT . . . right in your PLACE of BUSINESS!

* Produces a continuous supply of ice, cubed or

crushed, automatically.

* Cubes are crystal clear, sanitary . . . untouched

by human hands. Cube's unique shape provides larger cooling surface.

* Crushed ice delivered in three grades ... to meet

all your sized-ice needs.

* Easily, quickly installed. Requires only standard

electrical and water connections.

* Re-location a simple matter. Just disconnect

water and electricity . . . reinstall in new location.

Underwriters approved.

* Compact cabinet occupies only 4 sq. ft. floor area.

* Exterior styled to blend with finest surroundings. Finished in sea spray green or white, stainless steel trim.

* Minimum maintenance, maximum quietness . . . simplified, unique mechanism delivers individually

formed cubes.

* Starts with simple on-off switch. Machine stops automatically when bin is full, resumes operation as soon as few cubes are removed.

* Low operating cost . . . efficient, quiet refrigera

tion cycle uses small amounts of water and power.

26H-57PD

Page 6

26H5

SPECIFICATIONS

Carrier

IDEAL for RESTAURANTS, HOTELS, MOTELS, BARS,

TAVERNS, CLUBS, HOSPITALS, DRUG STORES . . .

wherever a continuous supply of clear, sanitary ice,

cubed or crushed, is a tangible business asset. The

Carrier Icemaker freezes and delivers up to 450 pounds

of ice per day, at 90° ambient air and 70° entering

water. Quietly, without complicated cutting or chop

ping mechanism, it provides hard, sparkling cubes or varied grades of crushed ice. The cube, too, is designed for highest efficiency ... its unique shape provides more-than-ordinary cooling surface.

COMPACT, ATTRACTIVE CABINET . . . takes up

only 4 square feet of floor area. Smart, modern design,

featuring rounded corners, o bonder!zed, boked-on sea spray green or white finish, richly trimmed in

stainless steel and chrome . . . complements any

and all furnishings.

ICE CRUSHER. Entirely automatic, electric-motor

driven unit. Delivers crushed ice in three grades —coarse, medium, or fine. User sets one control knob to “crushed" and the other to grade as dictated by needs.

REMOVABLE PANELS provide easy access to working

parts. Access for all normal service through removable front panel.

CARRIER SERVICEABLE-HERMETIC COMPRESSOR.

Provides all the advantages of ordinary, welded-type,

hermetically sealed compressors. No oiling, no belts, no shaft seal with consequent risk of refrigerant loss. In addition, retaining the advantages of the open-type compressor — can be adjusted and serviced on the job.

EXCLUSIVE DESIGN ICE-MAKING SYSTEM. NO

MOVING PARTS. Freezing coils are soldered to copper bands and attached, at 8 different points, to each of 26 stainless steel freezing tubes. In operation, ice builds up on inside wall of tube at these 8 separate points to form 8 cubes in each tube. Freezing completed, automatic controls reverse cycle, releasing cubes which simply “gravity drop" into bin or crusher, as “dialed" by user.

COMPLETELY AUTOMATIC. A simple rotary switch

starts the machine, from then on it produces ice auto matically. When storage bin fills with cubes, or crushed ice, the machine shuts off automatically, starting again whenever some ice is used.

STORAGE BIN (bottom section) available in three sizes — 160 pounds, 240 pounds and 500 pounds capacity. It has baked-on finish, stainless steel liner, 2 inches of insulation. Partition sepa

rates cubes and crushed ice.

SIPHON-INTERCHANGER. Automatically replaces

the water in the Icemaker system at the end of each freezing cycle. Pure, crystal clear ice is assured, even in hard water areas, with a minimum of cleaning and maxi

mum productive capacity.

ACCESSORY

208-VOLT CONVERSION PACKAGE. Consists of a

transformer which permits 230-volt model to operate satisfactorily on 208 volts.

MECHANICAL SPECIFICATIONS

COMPRESSOR: T4-horsepower, twin-cylinder, service

able hermetic type with a capacitor-start, induction-run, low starting torque motor.

CONDENSER: Water-cooled, shell and finned copper

coil type.

REFRIGERANT;

FREON-12.

REFRIGERANT CONTROL: Twin capillary tubes . . .

no moving parts.

WATER PUMP: Stainless steel shaft, bronze impeller

and bronze housing. Directly connected to a shaded pole, totally enclosed, thermally protected motor.

POWER CONSUMPTION: 940 watts during freezing.

SWITCH: 3-position rotary ... for manual starting

and stopping, or for operating of water pump for cleaning.

CURRENT: Available for 115 volt, 208 volt (with

conversion package), or 230 volt, 60 cycle, single phase,

alternating current.

Safe, non-toxic, non-inflammable

WATER CONSUMPTION: During freezing, 15 to 70

gallons per hour, depending upon supply water tem peratures.

DIMENSIONS: 77 inches high, 25 inches deep. Width

is 24 inches for 160 pound storage model, 34 inches for 240 pound model.

26H5 ICEMAKER WEIGHTS:

Machine section, 160 lb. bin, no crusher, crated 450 Machine section, 160 lb. bin, »o crusher, uncrated 405 Machine section, 160 lb. bin, with crusher, crated 490 Machine section, 160 lb. bin, with crusher, uncrated 445 Machine section, 240 lb. bin, no crusher, crated 484 AAachine section, 240 lb. bin, no crusher, uncrated 436 Machine section,, 240 lb. bin, with crusher, crated 524 Machine section, 240 lb. bin, with crusher, uncrated 476

Machine section, 500 lb. bin, no crusher, uncroted 438 Machine section, 500 lb. bin, with crusher, uncrated 478

ICE CRUSHER: Cast al uminum rotor, stainless steel

picks, sleeve bearings, belt-driven by a 1/6 horsepower, drip-proof, thermally protected motor, with adjustable

drive-pulley.

26H-57PD

Page 7

À 1

f FSAE WLET-

INTERCHANGER.

i MPT OUTLET—

NTERCH ANGER

STORAGE

COMPARTMENT

CAPAOTYILB)

100 160

5 -8^ 2-0"2'-6"

2-0

240 é-4| 2-10 3'-2"

B C

3'-2" 2-1"

DIMBISION

ÿ-o|"!-0"

2-1 " 1- 5"

r-o"

F G

8i"

8i'

l'l-8

3|"

III” III"

!-9"

2-0"

2-5

2'-8"

2'-8 2'-5”

PART NUMBER -

MACHINE SECTION WTH

MSAE INLET- CONDENSER

■INTERCHANGER TO FLOAT VALVE

CCNNECTION

MSAE OUTLET-CONDENSER

MSAE OUTLET- DRIP PAN

HEAT INTERCHANGER

NO CRUSHER

26H3- 309

£ o a

26H3- 329

26H3- 709 26H3-7I9

26H3- 729

DOMESTIC PART NUMBER -

ICE STORAGE COMPARTMENT

SEA SPRAY GREEN FINISH' 26D3-2 49

26D5- 449A

26D5-469A

WITH CRUSHER 26H3-319 26H3-339 WHITE

26H3-739

UIM. 1*1 I «

4 HpLES

FINISH

SEA SPRAY

GREEN

SEASFW

GREEN WHITE

WHITE FINISH

26D3^ 259 100 83 26D5- 459A 160 104

26D5- 479A

3«' DIA. THERMOSTAT BULB OPENING

ELECTRICAL

CHARACTERISTICS

ALL UNITS ARE f HP)

115- 1-60

230-1-50

STORAGE

CAPACITY

(LB)

i-of- —»

240

,1 i f

-4|"

mi®

NET

WEIGHT

(LB)

135

^ ioh-

INLET OPENING TO JUNCTION BOX - REAR PANEL

CE STORAGE COMPARTMENT

ICE

DISCHARGE

-^OPENING ^

-5-

lo|CD

MACHINE SECTION- BOTTOM VIEW

FRONT-# —!—

l‘-5f -

-l-llx"

___

V-i®

• 1

__L

t/>

(/)

lyTTERCHANGER.

TRi.R.0.

CHK. DE.M APPO. E.LV

DATE n-19-58

SUPERSEDES ISSUE OF

AUTOMATIC ICE MAKER-WATER COOLED

I* FSAE CLEANOUT - INTERCHANGER

f MPT DRAW - storage COMPARTMENT

ALLOW APPROX 2" FOR LEVELING SCREWS

DWO NO

26H3 - 423

Page 8

STORAGE COMPARTMENT CAPACITY

16 0 240 6-41' 500

6-4j

PART NUMBER

MACHINE SECTION WITH HEAT INTERCHANGER

2- O" 2- 10“

4L5"

3- 2"

2-1"

3^2" 2-1“

- ÿ-o" • 2-a“

____

1-0" 1-5"

E__..

0-8Ì 0- Ili 2-8" 2-5"

1-1 r

o'-Ili"

- J-

¿-8" 2-ë'

N0 CRUSHER 26H5-349A 26H5-369A

ü 1—

26H5-359A

26H5-389A

26H5-399A

26H5-669A 26H5- 689A

26H5-679A 26H5-699A

WITH CRUSHER

26H5-379A 26H5-409A 26H5-419A

UNITS WITHOUT CRUSHER WEIGH 301 LB. NET WITH CRUSHER, UNITS WEIGH 341 LB. NET.

ELECTRICAL

CHARACTERISTICS

(ALL UNITS ARE ^HP)

II5-I-60 230-1-60 115-1-60

230-1-60

FINISH

SEA SPRAY

GREEN

Ï'IIITC

, WHITE

|"FSAE INLET-

INTERCHANGER.

r'MPT OUTLET-

• INTERCHANGER \

INTERCHANGER

DOMESTIC PART NUMBER ICE STORAGE COMPARTMENT

SEA SPRAY GREEN FINISH

26D5-449A 26D5-4 69A 26D5- 479A

26H5-6 2 9B 26H5- 649B

INTERCHANGER TO FLOAT VALVE CONNECTION

MSAE INLET-CONDENSER

INLET OPENING TO JUNCTION BOX- REAR PANEL

X MSAE OUTLET- CONDENSER

1 MSAE OUTLET- DRIP PAN

160 LB. ICE STORAGE COMPARTMENT

240 LB. ICE STORAGE COMPARTMENT

i"FSAE CLEAN OUT-INTERCHANGER

1"mPT drain-STORAGE COMPARTMENT-500 LB. BIN DRAIN LOCATED ON

BOTTOM (L OF BIN, r'MPT- CAST BRASS

ALLOW APPROX. 2"F0R LEVEUNG SCREWS

WHITE FINISH 26D5- 459A 160

JDIA. THERMOSTAT BULB OPENING

(2)1

STORAGE

CAPACITY

(LB.) (LBJ

240 135

500

MACHINE SECTION-BOTTOM.VIEW

NET

WEIGHT

104

225

(/>

DR- ERA CHK. D.E.M

DATES- 8- 62 SUPERSEDES

ISSUE OF ir-19-sa

AUTOMATIC ICE MAKER-WATER COOLED

DWG. NO.

26H5-423

Page 9

Carrier

INSTALLATION

26H

-m

1. CHECK SHIPMENT

The unit is shipped in three cartons. One contains the machine compartment, one the storage bin and one the siphon interchanger assembly.

TABLE 1 - PARTS LIST

MACHINE SECTION CRATE

Model

26H3 1

26H5

Quantity

1 1 1 1

1 1 1 1 1

Description

Machine Section

Outside Standpipe Water Strainer Crusher Guard* Inside Standpipe &

Rubber Grommet

Machine Section

Outside Standpipe Water Strainer Crusher Guard* Inside Standpipe &

Rubber Grommet

2. SELECT PROPER LOCATION

Select a location for the unit before delivery. The following should be considered:

1. Convenience - Select a clean dry place as close as possible to the point of ice consump tion. Consult the user before deciding.

2. Room Temperatures Minimum 50 F - Room temperatures below this may cause erratic control operation.

Maximum 100 F - Room temperatures above this overload the compressor and reduce unit

capacity.

3. Floor Strength - See Table 2.

TABLE 2 - OPERATING WEIGHT AND

DIMENSIONS

Model No.

26H3

Total Weight

(Bin Full of Ice)

389

Bin Cap.

100 25 X 24

Floor

Area (In.)

On units equipped with crusher only.

STORAGE BIN CRATE

Size, Lb. Quantity

100, 160, 240,

500 4

HEAT INTERCHANGER PACKAGE

Quantity

1 1 2 Hose Clamps

STORAGE BIN PARTITION

Quantity Description

Partition

Machine Screws

Description Storage Bin Leveling Screws

Description Interchanger Rubber Hose

26H5 565 26H5 26H5 940

NOTE: Add 40 lb for Crusher.

4. Clearance: Top

Rear and Sides Front

5. Water Supply - See Section 12.

6. Drain Connections - See Section 12.

7. Electrical Connections - See Section 13.

3. MOVE UNIT TO LOCATION

Move the unit to the proper location before uncra ting. Crated dimensions are shown in Table 3.

676

10" Minimum

6" Minimum

24" Minimum

160 25 X 24 240 25 X 34 500

32 x50

26H-57PD

Page 10

26H INSTALLATION

TABLE 3 - CRATED DIMENSIONS

Carrier

Height Depth

(in.) 26H5 Machine Section 26H3 Machine Section 100 lb. Bln

160 Lb. Bin 39-1/2 240 Lb. Bin 500 Lb. Bin Heat Interchange!

4. UNCRATE THE BIN

Uncrate the bin first since it serves as the base for the unit.

5. INSTALL LEVELING SCREWS

Support the bin with the four leveling screws sup plied with the bin. See Fig. 1. The top of the bin can be used for leveling.

43-1/2 43-1/2 31-1/2

39-1/2

45-1/2

22-1/2

Width

(in.) 23-1/2 23-1/2

27 26-1/2 26-1/2

34-7/8 49-1/2

6. UNPACK AND MOUNT THE HEAT

Remove the interchanger and parts from the carton. Mount the heat interchanger on the back of the bin with the 6 sheet metal screws in the paper envelope. The position of the interchanger on the back of the

bin is shown in Fig. 2.

(in.) 28-1/2 28-1/2 236

26 25 112 35

5 18

INTERCHANGER

Weight

(lb.) 307

142 225

FIG. 1 - LEVELING SCREWS INSTALLED

26H-57PD

HEAT INTERCHANGER

DRAIN

HEAT INTERCHANGER CLEAN

FIG. 2 - POSITION OF HEAT INTERCHANGER

ON THE BIN

Page 11

Carrier

INSTALLATION

26H

7. MOVE THE BIN TO APPROXIMATE LOCATION

Move the bin as close as possible to the final lo cation before placing the machine section on top

of it.

8. UNCRATE THE MACHINE SECTION

Uncrate the machine section as shown in Figs. 3

and 4.

9. REMOVE THE FRONT TOP, AND SIDE PANELS

Remove the front, top, and side panels in that order before moving the machine section.

FIG. 5 - REMOVING SCREWS HOLDING TOP

AND SIDE PANELS

FIG. 3 - UNCRATING - REAR BOLTS

FIG. 4 ■ UNCRATING - BOTTOM BOLTS

10. PLACE MACHINE SECTION ON TOP OF BIN AND BOLT IN POSITION

Remove the short front panel. Using the two cap screws in the cloth bag shipped with the bin, bolt the machine section in place as shown in Fig. 6.

BOTTOM BOLT

FIG. 6 - BOLTING MACHINE SECTION TO BIN

26H-57PD

Page 12

INSTALLATION

n. BOLT TIE BAR AT REAR OF UNIT

Lock the two sections together with the tie bar

shipped on the back of the machine section. See

Fig. 7.

Carrier

^1^

Refer to Fig. 9 for recommended piping details.

FIG. 7 - BOLTING TIE BAR AT REAR OF UNIT

12. INSTALL WATER SUPPLY AND DRAINS

Fig. 8 shows the piping connections and parts sup plied by the factory. Any approved source of drink ing water can be used provided a 30-60 lb. water pressure can be maintained. If the pressure ex ceeds 60 lbs. a pressure reducing valve must be used.

FIG. 9 - PIPING DIAGRAM

The drain lines should be piped separately to an open drain. The bin drain must be pitched down ward for gravity flow. See Fig. 10.

r 6ALVAN12ED"T

FIG. 8 - PARTS SHIPPED ON BACK OF

MACHINE SECTION

26H-57PD

GALVANIZED NIPPLE

FIG. 10- OPEN DRAIN

Page 13

Carrier

INSTALLATION

26H

13. MAKE ELECTRICAL CONNECTIONS

Obtain a voltmeter or the special portable line vol tage tester recommended in the Carrier Product Information Book. For satisfactory results, the vol

tage when the unit is running must always remain within 10 percent of the rated nameplate voltage.

Check the current supply at the customer's prem ises and resolve any wiring problems before pro ceeding with the installation. See Table 4 for nec essary electrical data.

TABLE 4

FULL LOAD

MODEL VOLTAGE

26H3

26 H5

26H5

Carrier Part No.

115

115 230 6.7

General Electric Part No.

CURRENT

10.8 15

13.4 17 1/2

TABLE 5 - 208V APPLICATION

Total

Amps

Allowable

208V APPLICATION "BUCK AND BOOST" TRANSFORMER

For application on 208 volt circuits, a transformer is recommended to boost the voltage from 208 volts

to 230 volts. The information in Table 5 should be

helpful in selecting the transformers. It is selected

on the basis of making a 10% voltage boost from

205 volts to 225 volts.

FUSETRON

SIZE

WIRE SIZE (AWG) TYPE R,T

LENGTH OF RUN

25'

12 12

50'

100'

10 6

8 6

14 12

200'

HT04AH026

HT04AH035

Not stocked at Carrier

The wiring connections for this transformer for a 10% voltage boost are as follows:

9T51Y6171 12.5 amps.

9T91Y6172

-INPUT-

FIG. n - "BUCK AMD BOOST" TRANSFORMER WIRING

25 amps. Four units without crushers or two units with

37.5 amps.

-OUTPUT-

-—I 2

Two units without crushers or one unit with crusher plus one without crusher.

Will NOT handle two units with crushers.

crushers plus two units without crushers.

Will NOT handle four units with crusher.

Six units without crushers or three units with crushers plus three units without crushers

26H 57PD

Page 14

26H INSTALLATION

14. INSTALL BIN THERMOSTAT BULB

Remove the tope holding the bin thermostat cap illary and bulb in a coiled position inside the right

side of the machine section. Uncoil 4 or 5 loops

of the capillary and insert the bulb through the hole

in the right rear corner of the machine section into the bin. Run the capillary along the top of the bin and down the back of the thermostat bulb bracket.

See Figs. 12 and 13.

BIN THERMOST^r a HI PRESS.

CUTOUT

Carrier

OR BIN

tmsSostat

ARY

SIDE View DETAIL

FIG. 12 - BIN THERMOSTAT CAPILLARY AND

BULB ARRANGEMENT

26H 5-500. 240 AND 160 LB. BINS

Attach the clamp to the bottom hole in the bracket; insert the thermostat bulb in the clamp so it ex tends 1/2" below the bottom of the bracket. Tighten the clamp.

26H3-100 LB. BINS

FIG. 13

RIGHT SIDE OF 26H3 SECTION -

PANELS REMOVED

Instructions for mounting the thermostat capillary and bulb on a partition are included in the partition package.

CAUTION: Insulate the capillary where it goes

through the hole in the machine section and the bin with tape or rubber tubing.

15. INSTALL CRUSHER GUARD

Remove crusher guard assembly from ice chute on

grusher models and install per instructions in para graph 19 on page 39.

16. INSTALL SIPHON STANDPIPE AND ADJUST FLOAT

Remove the ice deflector to gain access to the water pan. Fig. 14.

With the clamp attached to the bracket at the top hole in the arm of the bracket, insert the thermo stat bulb in the clamp so the clamp is approximately

in the middle of the bulb and tighten the clamp.

26H-57PD

Place standpipe assembly and rubber grommet in water pan drain. (See Fig. 14). On 26H3 unit, remove knockout in stainless steel jacket. (Do not remove on 26H5 unit.)

Page 15

Carrier

INSTALLATION

26H

FIG. 14 - CORRECT WATER LEVEL

Turn on the water and set the float valve to main tain a water level 3/8 " below the top of the siphon stcujdpipe for the 26H3 and 1/2" below for the 26H5. See Fig. 14.

The water level should be set with the pump off, and checked again with the pump running, after the water level has settled. To check the Siphon action let the unit run on "Pump" until the float shuts ofi

the water to the pan. Turn the selector switch to

"Off". The water in the header and the water pipes will drop down and raise the water pan level until the Siphon action begins and the water pan is si

phoned out.

If the water pan fails to siphon out, the water level

has been set too low. If the water siphons or over

flows the inner standpipe when the pump is running, the water level has been set too high.

FLOAT ASSEMBLY

17. REPLACE THE ICE DEFLECTOR

After the float is set, tighten the wing nut on the float arm and the setscrew to the flat on the float arm. See Fig. 15.

The bottom of the deflector sets in two clips fas tened to the inside front wall of the water pan. The

back of the ice deflector rests against the front of the evaporator shroud. See Fig. 14.

26H-57PD

Page 16

26H

INSTALLATION

18. LOOSEN COMPRESSOR HOLD-DOWN BOLTS

26H5

Loosen the four compressor hold-down bolts. See Fig. 16. Check to see that the compressor is float ing freely on its mounting springs.

When the machine is to be moved, retighten the hold down bolts to prevent damage.

26H3

The 26H3 is spring mounted internally. Do not

loosen compressor hold-down bolts.

19. START THE UNIT

Shutoff valves are backseated and the unit is ready

for operation when shipped.

Turn the selector switch located under the hinged nameplate to the "ON "position and check the opera

tion. See Fig. 17. If the unit fails to start^ push the reset button on

the Safety Overflow Switch.

NOTE: The 26H5 unit may cycle several times on

the high pressure cutout during initial start up or after a prolonged shut-down. While such cycling is perfectly normal, it may

COMPRESSOR

SHIPPING POSITION

DO NOT REMOVE

COMPRESSOR FLANGE

SPRING

SPRING CUP

UNIT FRAME

OPERATING POSITION

COTTER PIN

WELD NUT

BOLT TIGHT AGAINST WELD NUT

FIG. 16 - COMPRESSOR HOLD-DOWN BOLTS

be reduced by shutting off the unit for about

a half a minute then starting again.

The 26H3 may cycle on overload several times upon attempting to start after a pro longed shutdown.

26H-57PD

Page 17

Carrier

INSTALLATION

26H

20. CHECK OPERATION

The operation should be as follows:

(a) Freezing for 30 or 40 minutes - compressor

operating, pump operating and hot gas so lenoid closed. A longer freezing period may occur where the water supply temperature is high.

(b) Defrosting for approximately 6 minutes - com

pressor operating, hot gas solenoid open and water pump off.

falling of the last cube and the start of the next freezing cycle, should be about 1/2 a minute to 1-1/2 minutes, to increase overrun time, raise the setting of the righthand ele ment (cut in) of the Main Control Thermostat.

(d) The hole in the average ice cube should be

about 3/16" diameter. Run two or three batch es, since the first harvest will produce-cubes

with larger than overage holes.

21. FINAL CHECK LIST

3. Has the overrun time (par 20C) been set?

4. Have all the controls been checked?

5. Has the voltage been load tested and checked against nameplate voltage?

6. Have the compressor hold-down bolts been loos ened so that the compressor rides freely on its

mounting springs?

7. Has the float been set so water will siphon out

at the end of each freezing cycle?

8. Operate the unit for at least two or three cycles. Is it operating properly?

9. Is the unit quiet?

10. Is the unit clean?

11. Have the installation and warranty cards been filled out?

1. Is the unit level?

2. Have all electrical and piping connections been made?

12. Has the owner been given the Operating Instruc tion booklet and has he been instructed on how to operate the machine?

26H-57PD

Page 18

Carrier

Page 19

^-rar

Carrier

1. HOW THE AUTOMATIC ICE MAKER WORKS

The Ice Cube Maker is fully automatic and operates in two alternate cycles - first the freezing cycle, then the

harvesting cycle. The compressor operates continuously during both cycles

SERVICE

26H

FREEZING CYCLE (SEE FIG. 1)

During the freezing cycle water is pumped from the water pan (13) to a water header (16) at the top of the unit. From, the water header it flows over individ ual spreader plates, down the four inside surfaces of each of the square, stainless steel freezing col

umns (18). Here water is frozen into individual cubes. This is accomplished by unique evaporator design. Copper sleeves are bonded to the outside of each stainless steel column at eight points spaced along its vertical dimension. Sections of the evaporator coils are in turn soldered to these copper bands. Because of the high rate of heat transfer through the copper and the low conductiv ity of the stainless steel, individual cubes start to form inside the columns opposite each copper band and grow from this point. The hole in the cen ter is due to continuous water flow - necessary to form clear cubes.

DEFROST CYCLE (SEE FIG. 2)

When the passage through any one of the columns becomes restricted because of ice formation, water backs into the overflow trough, (19), and drops into

the thermostat well,. (21). Here the cold water acti vates the cut-out side of the Ranco two-bulb con trol, (35A). This starts the harvest cycle by stop ping the water pump (14), and opening the hot gas solenoid valve, (33). The solenoid valve allows hot gas to pass directly from the condenser, (2), to the evaporator coil, (6). The cubes are melted loose and allowed to drop through the ice chute into the

storage compartment, or bin, (37). If the cubes fail to drop, the water will continue to build up in the overflow trough and will flow into the safety over

flow well'(23). This actuates a safety switch (24)

and shuts the machine off.

The hot gas passing from the evaporator coil through

the suction line, warms the capillary bulb (35B) attached to the vertical portion of the suction line leading from the first accumulator. The warming of this_ bulb activates the cut-in side of the Ranco

two-bulb control, which starts the machine on the

freezing cycle. As soon as the Ranco control moves

the machine into the freezing cycle, the water pump

is automatically started and the solenoid valve

closes.

26H-57PD

Page 20

1- COMPRESSOR 2- CONDENSER 3- STRAINER a DRYER 4- ADAPTER (FOR TWIN CAPILLARIES) 5- TWIN CAPLLARIES 6- EVAPORATOR COILS 7- 1ST ACCUMULATOR 8- 2ND ACCUMULATOR

9'SXTION LINE

10- SHUT-OFF VALVE (WATER SUPPLY)

11- WATER STRAINER

FUDAT VALVE WATER PAN WATER PUMP WATER LINE (TWIN)TO WATER HEADER WATER HEADER WAT^R NOZZLES FREEZING COLUMNS OVERFLOW TROUGH DRAIN LINE FROM OVERFLOW TROUGH

THERMOSTAT WELL

•SIPHON STANDPIPE (WATER PAN DRAIN)

FIG. 1 - SCHEMATIC FREEZING CYCLE

23- SAFETY OVERFLOW WELL 24- OVERFLOW SAFETY SWITCH 2 5-WATER SUPPLY TO. CONDENSER 26- WATER REGULATING VALVE 27- CONDENSER WATER DRAIN

28- DRIP PAN FOR MACHINE SECTION 29- DRIP PAN DRAIN LINE 30- OIL RETURN LINE 31 • SERVICE SHUT-OFF VALVE 32-HIGH PRESSURE CUT-OUT

33 HOT GAS SOLENOID VALVE

34- MAIN CONTROL THERMOSTAT 35A- MAIN CONTROL “CUT-OUT C^ILLARY

35B-MAIN CONTROL'CUT-

36 - BIN THERMOSTAT

37 - BIN

38 - BIN DRAIN 39 - HOT GAS LINE

40 - WATER SUPPLY TO HEAT INTERCHANGER

41- WATER SUPPLY TO SUMP 42- HEAT INTERCHANGER 43- HEAT INTERCHANGER DRAIN

IN" CAPILLARY

Page 21

Carrier

SERVICE

26H

t?T

sssssss?;?;

ii iSi

gSesni-

m _i U >U

I—

O Di

< s

o tl.

26H-57PD

Page 22

26H SERVICE

Carrier

FIG. 3 - ICE CRUSHER ASSEMBLED - FRONT VIEW

CRUSHER OPERATION

The defrost and freezing cycles of an Ice Maker

with a crusher are identical to those of units without

a crusher. Normally the crusher is a factory mount ed accessory, enclosed in the machine section. If desired, a crusher package may be purchased sep arately for installation. (See Fig. 3)

CAUTION; When cleaning units equipped with crushers or performing service operations, discon nect the power supply.

The two crusher control knobs are mounted on the lower front panel (Fig. 4). When the knob on the left is positioned on "Crushed" the cubes pass through the crusher and crushed ice falls into the bin. Fineness of the crushed ice is controlled by the knob on the right. When the knob on the left is positioned on "Cubes", the ice cubes bypass the crusher and fall into the bin.

The knob marked "Crushed - Cubes" controls a

switch to the crusher motor and the position of a damper to direct the cubes. The motor is cut out of

the control circuit when the switch is turned to

"Cubes".

is in the "Crushed" position and the bin thermostat

stops the unit during the harvest cycle^ the crusher

me tor will continue to operate until the main control

switches to the freezing position or the selector switch is turned to "Pump" or "Off". This prevents accumulation of cubes at the crusher entrance.

When ice builds up in the bin and touches the ther mostat bulb, the unit will stop. If the crusher knob

26H-57PD

FIG. 4 - ICE CRUSHER CONTROLS

Page 23

Carrier

SERVICE

26H

REMOVING THE PANELS

To remove the top front panel turn both handles so

they are horizontal and lift it out. To remove the

top panel remove the screws shown in Fig. 5. Tilt

the panel up and back to disengage it from the back panel. The side panels are held in place at the front by two screws and the bottom front panel. The side panels engage with the flanged edge of the back panel. Do not remove the back panel except when absolutely necessary. It is held in place by six screws threaded into the frame.

Cleaning and inspecting can be done by removing the front access door, splash curtain, and ice de flector screen. The plastic curtain is riveted to a cross arm held in place by two screws (Fig. 6).

After inspection and cleaning, be sure to reposition the plastic curtain properly to prevent water from splashing into the bin. (Fig. 7).

FIG. 5 - REMOVING SCREWS HOLDING TOP

AND SIDE PANELS

2. REFRIGERANT CIRCUIT

L SHUTOFF VALVES

Fig. 8 is a cross sectional view of a shutoff valve in mid-position. When the unit is shipped all valves are backseated and should be left so during normal operation. A brass cap and gasket cover the valve stem to prevent leaks. The gauge ports are plugged

with two 1/8" MPT plugs.

ACCESS DOOR ICE CRUSHER CRUSHER

FIG. 6 - REMOVING ACCESS DOOR AND

ICE DEFLECTOR

26H3

There are two shutoff valves in the circuit - a suc

tion valve and a discharge valve. (See Fig. 9).

26 H5

There are three shutoff valves in the circuit - a suc tion valve, discharge valve, and oil return valve. (See Fig. 10).

MOTOR

26H-57PD

Page 24

26H

SERVICE

DISCHARGE ? SHl/T OFF VA;,'/«

FIG. 7 - FREEZING COLUMNS. ICE DEFLECTOR, SPLASH CURTAIN,

SIPHON STANDPIPE. ACCESS DOOR AND WATER PAN ARRANGEMENT

CONNECTION TO

FIG. 8 - SHUTOFF VALVE

CILRETL«»; SHOT 0*"'

VALVE,

GAUGE CONNECTION

FIG. 9 - TOP VIEW OF 26H3 MACHINE SECTION

26H-57PD

FIG. 10 - TOP VIEW OF 26H5 MACHINE SECTION

Page 25

Carrier

SERVICE

26H

2. INSTALLING GAUGES

a. Backseat suction and discharge shutoff valves.

SUCTION LINE PRESSURE GAUGE

DISCHARGE LINE PRESSURE GAUGE-

CHARGING HOSE ATTACHED TO THE SUCTION VALVE WITH A 1/4" HALF UNION COUPLING

b. Remove gauge plugs and install 1/8" MPT

X 1/4" flare half union coupling.

c. Attach 1/4" OD copper gauge line, flared at

both ends, to the couplings.

d. Attach suction and discharge gauges to these

lines, leaving connection slightly loose.

e. Crack the valve off back seat, allow a small

amount of refrigerant to escape, and tighten

the flare nut.

To read line pressures, turn the shutoff valves slightly from the backseat position. If the gauge needle vibrates, backseat the valve until there is no vibration but the gauge still reads line pressure.

NOTE: To conserve refrigerant, use short lengths

"FREON-12 DRUM

of small bore tubing when installing gauges. This unit is sensitive to charge and repeated installa tion and removal of gauges with necessary purging

of air will result in an undercharge of refrigerant.

FIG. 11 - CHARGING MANIFOLD ATTACHED

FOR CHARGING UNIT

3. PUMP DOWN OF COMPRESSOR

If the refrigeration system must be opened at the compressor, first "Pump Down". Proceed as follows:

1. Install a pressure gauge to the suction shut off valve.

2. Front seat the suction shutoff valve.

3. Front seat the oil return line shutoff valve (on 26H5).

4. Operate the compressor intermittently until the suction pressure gauge indicates 0 to 2 PSIG pressure is being maintained in the crankcase.

5. With the compressor stopped, front seat the discharge shutoff valve.

6. Loosen the discharge shutoff valve gauge plug slightly and bleed off any remaining pres

sure. The compressor can then be opened or

removed.

7. After repairing the compressor, evacuate and purge it to remove residual air. Remove the pipe plug from the gauge connection of the

discharge shutoff valve. Operate the com pressor for about 10 minutes. Place your thumb over the discharge valve gauge connection^ at the some time stopping the compressor. Crack open the SUCTION shutoff valve, momentarily, allowing a small amount of gas to enter the

compressor. Front seat the suction shutoff

valve immediately. A slight gas pressure

should not be felt against your thumb. Re

place the pipe plug. The suction, discharge

and oil return line shutoff valves can now be

backseated and the machine is ready for op eration.

26H-57PD

Page 26

26H

4. CHARGING WITH REFRIGERANT

SERVICE

TABLE 1 - REFRIGERANT CHARGE (R12)

Carrier

MODEL

26H5

26H3 9 " condenser and 9 " accum. 1 lb. 11 oz.

26H3 Serial No. 331784 Change to 18"cond.-

26H3

26H3 Serial No. 510446 change to 15"cond.—

If the unit is undercharged, back seat the suction shutoff valve. Remove a gauge port plug from the valve; connect a charging line from a drum of re

frigerant 12. Tighten this line at the drum, but make

a loose connection at the suction shutoff valve. Crack the valve on the drum so that refrigerant va por will force air from the charging line out the

loose connection. After purging the air from the charging line, tighten the connection at the suc tion shut-off valve. Open the suction valve to a point midway between the back-seated and frontseated positions. With the suction shutoff valve in this position, it is possible to read the system pres sure during the charging period. The refrigerant 12 drum should be in an upright position to admit va por only.

No changes

9 " accumulator

Serial No. 411152 change to 15"cond.9 " accumulator

10 1/2" accumulator 2 lb. 9 oz.

IDENTIFICATION

CHARGE

3 lb. 8 oz.

2 lb. 3 oz.

WEIGHING IN CHARGE

The most accurate method of charging a refrigerant system is weighing in the charge. Proceed as fol

lows:

1. Bleed any charge remaining in the system, then start the compressor and pump out the system through the discharge valve.

2. With the compressor still running, connect the drum of refrigerant to the suction valve.

3. Back seat the discharge valve and immediately turn off the compressor.

4. Weigh the drum of refrigerant (it is easier to weigh a charge if the weight of the drum can

*, be checked during the charging process).

If the unit is overcharged, turn the unit off. Back

seat the discharge shutoff valve. Attach a charg ing line to one of the gauge ports in the valve and attach a charging manifold to the other end of the charging line. Turn the shutoff valve to the middle position; start the unit. Bleed refrigerant from the charging manifold in 5-second intervals until the charge is correct. Turn the unit off. Back seat the shutoff valve and remove the charging line. Replace the gauge port plug and start the unit.

26H-57PD

5. Open the suction valve and crack the valve on the drum of refrigerant. Start the compressor.

6. Continue to charge until the scale shows the proper amount of refrigerant has been fed into the system.

7. Close the valve on the drum and then the suc tion shutoff valve.

8. Disconnect the charging line.

9. Leak test the system.

Page 27

Carrier

SERVICE

26H

FROST LINE METHOD OF CHARGING

By establishing a frost point on the suction line,

it is possible to charge these units to within one

ounce of their specified charge. By this, frost point,

it is also possible to determine whether or not a

machine is only partially charged. Below are listed

the recommended methods for charging the H3 and H5 ice makers, which require a partial or a full charge. Frostline should be at the point indicated when the machine has operated on the freezing cycle for 20 minutes.

CAUTION: If Freon is added in small amounts, the frost line will continue to move towards the small

accumulator. If Freon is added too rapidly, the frost line will disappear. It is then necessary to wait until the frost reappears before adding or

bleeding off refrigerant.

After making sure that the machine is leak free and in good running condition, proceed as follows with the pump runnfng during the entire freezing cycle.

Method lA - 26H3 Ice Maker No Charge in Unit

2. Charge slowly until the suction shutoff valve and flare nut frost

3. Bleed off gas until frost just recedes from valve.

Method 2A - 26H5 Ice Maker No Charge in Unit

1. Remove first clip immediately above small ac

cumulator, and pull back two or three inches of the suction line insulation.

2. Start machine with pump on. Charge until suc

tion pressure is 15 PSIG.

3. Discontinue charging and allow machine to run

for 10 minutes. During this period, check to

see if the suction pressure is holding at ap

proximately 15 pounds.

4. Charge slowly until ffost forms on the suction

line between the small accumulator and the suction shutoff valve on the compressor.

5. Bleed off gas until frost line recedes back to

the joint on the top of the second accumulator.

6. Allow machine to run through two complete cy

cles to check operating pressures.

1. Start the unit with the pump running. Charge until the suction pressure is 15 PSIG.

2. Continue running the machine for 10 minutes without adding to the charge.

3. Add gas slowly until frost forms on the suction shutoff valve and the flare nut.

4. Bleed off slowly until frost just recedes from valve.

Method IB - 26H3 Ice Maker Partial Charge in Unit

1. Start unit and let it run undisturbed for 20 min utes.

Method 2B • 26H5 Ice Maker Partial Charge In Unit

1. Remove insulation from suction line 2 or 3" above second accumulator.

2. Start machine and allow it to run for 20 min utes undisturbed.

3. Charge slowly until frost forms on fhe suction line between the small accumulator and the suction shutoff valve.

4. Bleed off gas unfil frost line recedes back to the top of the second accumulator.

5. Allow machine to make two complete cycles to check its operating pressures.

27 26H-57PD

Page 28

26H SERVICE

Carrier

5. OPERATING PRESSURES

Table 2 shows suction and head pressures during

a normal freezing and defrost cycle.

6. COMPRESSOR

OIL CHARGE 26H3

The oil charge is 45 oz. Because of this large volume, the oil charge is not critical. The com

TABLE 2 - 26H ICE MAKER OPERATING PRESSURES (PSIG)

OPERATING PRESSURES

TIME INTO

CYCLE

(MINUTES)

2 129 21

6 134

° AIR-90° WATER

26H3 *

Head Suction

131 20 134

Head

26H3 +

Suction

131

134 23 159

Head Suction Head Suction

24 144 23 150

pressor is a welded hermetic and there are no pro visions for checking or adding oil in the field.

OIL CHARGE 26H5

The compressor is factory charged with two pints of Carrier PP45EB-302 oil which is a special low temperature refrigerant duty oil. Do not use ordinary motof oil. Before checking the oil level, operate the unit for at least 30 minutes to balance the oil distribution in the system.

90°

AIR - 70° WATER

26H5 26H3 * 26H3 +

Suction Head Suction

Head

29 29 131 19 132 26 131 18 131

130

20 132 24 132 27

22 21

26H5

134 134 22

8 134 20 132 22 149

10 133

20 130

30 134

35 40 129 15 45

E F

S T

26H3 From Serial No. 331784 to 510446 26H3 From Serial No. 510446 to present.

130 18 130 19 130

132

130 15

129 14

2 115

122 57 103 48

4 6

20 131

17 16 16 131 16

52 79

129 129 16 128 17 132 16 131 15

131 15 128

130 128

24 132 17 131 20 130 20

21 130

15 128 15 129 14

130 18 130 16 131 16 130

128 16 132

22 131 19

131 17 130 17 127

130

17 130

•

34 55 30 124

70 36 128

100 58 106 44 100

55 77 62

19 129

131 132 15 131 16 133 14 131 15 132 14

30 38

65 33 80

20 18

41 57

¿6H-57PD

Page 29

Carrier

To check the oil level:

a. Install gauges and pump down the compressor. b. Remove one of the oil fill plugs on the side

of the compressor.

c. The oil level should be 1-1/4" as shown in

Fig. 12. Oil can be added through the oil filler plugs. Reinstall the filler plug immediately to prevent absorption of moisture. It may damage

the motor windings.

Caution: Avoid overcharging as excess oil may restrict the capillaries and reduce unit capacity.

On those compressors with a sight glass, oil level should be between 1/2 and 2/3 above bottom of glass.

SERVICE

26H

TESTING THE COMPRESSOR MOTOR

Series Test Light and Hermetic Test Cord

Fig. 13 shows atest cord that is useful as a 110/220 volt test light or as a cord for starting the com pressor without using the unit controls. When used

as a series test light, turn screw base outlet into the lamp socket, plug into a power source and use insulated leads indicated in Fig. 13 as probes to

determine continuity. When used as a compressor

starting cord, the fuse is used in the lamp socket. To start compressor using test cord, disconnect

all leads from compressor terminals. Clip common

and running leads of cord to "C" and "R" terminals respectively. Plug cord into source of power, and

NOTE MEASURE OIL LEVEL AT 45®ANGLE AS SHOWN FROM OUTSIDE

FACE OF OIL FILL HOLE. OIL GUAGE CONSISTS OF A l/4"COPPER TEE SOLDERED TO A STRAIGHT PIECE OF 1/4"COPPER TUBING

FIG. 12 - COMPRESSOR OIL LEVEL

momentarily touch starting lead of cord to "S" on compressor terminals. Do not leave this prong in

contact with terminal "S" for more than one or two seconds; otherwise the starting winding will be

damaged.

Caution: When using test cord on compressor, stand clear of terminals. If current should arc or terminal break, terminal may blow out with considerable force. An arc might also ignite oil entrained in es caping gas.

NOTE: SINGLE CAPACITORS USED FOR II5V. DUTY AND

230 V DUTY ARE DIFFERENT AS NOTED ABOVE

FIG. 13 - TEST CORD DIAGRAM

26H-57PD

Page 30

26H SERVICE

Carrier

Portable Line Voltage Tester

APPLICATION AND OPERATION - A portable line

voltage tester with built-in phantom load which provides a simple means of checking single phase or direct current circuits is shown in Fig. 14. By

reading the voltage at no load and the voltage with

phantom load it can be determined if the circuit is adequate for starting and operating the unit. The

tester is made to Carrier specifications and includes a table for use with ice cube makers.

PHYSICAL DATA

Case Size Voltmeter Scale

Ampere Load Voltage F requency Approx. Weight

J. & W. Company 290 Roycroft Blvd., Buffalo 21, N.Y.

8"x 8"x 4"

0-150 volts (Double Reading for 230V)

11.5 115 - 230 25, 50, 60 cycles or direct current

5 pounds

Order Directly from

the suction line with a 1/2" plug to prevent moisture from entering the system.

2. Cut the discharge line and sweat in a 1/4" SAE male copper to flare connection. Cap this connection to prevent moisture from entering the system.

3. Disconnect the compressor leads at the se lector switch and thermostat.

4. Remove the four compressor mounting bolts and lift the compressor from the unit.

5. Seal all openings on the compressor to pre vent moisture from entering prior to repair or exchange.

6. If compressor failed due to motor burnout, see

"Replacement After Motor Burnout".

7. Install the replacement compressor. The re-

placemsat compressor is shipped with the dis

charge line fastened to the suction shutoff

valve gauge portby means of a 1/4" flare nut.

8. After completing all wiring and piping con

nections evacuate and purge the replacement compressor.

FIG. 14 - VOLTAGE TESTER

COMPRESSOR REPLACEMENT 26H3

To replace the compressor use the following pro cedure:

1. Purge the refrigerant charge and then frontseat both shutoff valves. Disconnect the suc tion line flare nut at the shutoff valve. Seal

9. Charge the unit with refrigerant 12. See Sec tion 4.

10. Before leaving the unit check for leaks.

COMPRESSOR REPLACEMENT 26H5

To replace the compressor, follow this procedure:

1. If the compressor is in running condition, pump down as explained in Section 3.

•2. If the compressor is not in running condition close the suction, discharge and oil return shutoff valves and then slowly bleed pressure thru the discharge gauge plug.

3. Check to see that both shutoff valves are f rontseated and unbolt them from the com

pressor. Leave the valves connected to the piping.

4. Disconnect the high pressure line from the

discharge side of the compressor.

5. Close the water supply valve and disconnect the compressor cooling coil. The replacement compressor comes supplied with this coil.

26H-57PD

Page 31

Carrier

SERVICE

26H

6. Remove the compressor terminal box cover and disconnect the compressor motor connec

tions. Mark connections so they may be cor rectly reconnected to the replacement com pressor.

7. Remove the cotter pins and castellated nuts from the top of the compressor mounting bolts.

8. Lift the compressor from the unit.

9. Seal all openings on the compressor to pre vent moisture from entering prior to repair or exchange.

10. If compressor failed due to motor burnout, see "Replacement After Motor Burnout ".

11. Install the replacement compressor. Place

new gaskets between all shutoff valves and the compressor flanges.

12. Make sure the oil level in the replacement compressor approximates oil level in the

compressor removed.

13. After completing the piping and wiring, evacu

ate and purge the replacement compressor as described in Section 3.

3. Remove strainer-drier from liquid line, liquid line for 1/4" SAE connections.

4. Install Sporlan Catch-.'\11 Type C-162 StrainerDrier. The 1/4" liquid line coming from near bottom of condenser should be fastened to the inlet side of the Sporlan Catch-All. Direction of arrow should be pointing upwards.

5. Install new compressor.

6. Evacuate the entire system as described in Section 8 and add refrigerant as described in Section 4.

The Sporlan Catch-All can be left in the refrigerant circuit. In addition to drying the refrigerant in the

system, the molded, porous core of the Catch-All will catch all scale, solder particles, carbon, sludge, dirt or any other foreign matter with negli

gible pressure drop.

7. LIQUID-SUCTION INTERCHANGER AND

ACCUMULATOR REPLACEMENT

26H3

Flare

14. Backseat all valves and start unit.

15. After operating for at least 2 cycles, check the refrigerant charge as described in Sec

tion 4.

16. Check for leaks. Use a halide torch, soap bubble method or both.

REPLACEMENT AFTER MOTOR BURNOUT

When a hermetic motor compressor burns out, the stator winding insulation decomposes - forming carbon, water and acid. To prevent contamination

of the refrigerant system by these products of com

bustion, the refrigerant circuit must be cleaned when installing a new compressor.

The procedure for cleaning the system is as follows:

1. Disconnect water supply line and. drain the water from the condenser, to prevent con denser freeze-up during purging.

2. Purge refrigerant charge.

a. Open the disconnect switch. b. Remove all panels. c. Slowly bleed the system to the stmosphere as

described in Section 8.

d. Front seat both the suction and the discharge

valves.

e. Unscrew the flare nut at the suction service

valve.

f. Unscrew the flare nut attaching the capillary to

the drier and loosen the clamp holding the capil lary adapter to the frame.

g. Unsweat the capillary at the top of the evapo

rator. The evaporator shroud will not telescope the way it does on the 26H5. Be careful when using a torch near the evaporator as the evapo

rator tubes are soft soldered to the freezing columns.

h. Unsweat the suction line at the evaporator.

Refer to sections 8 and 4 for evacuating and recharging instructions.

31 26H-57PD

Page 32

26H

SERVICE

Carrier

26H5

a. Open the disconnect switch. b. Remove all panels.

c. Slowly bleed the system to the atmosphere as

described in Section 8.

d. Front seat the compressor shutoff valves and

the oil return line shutoff valve

e. Unscrew the flare nut at the suction service

valve.

f. Unsolder the liquid line at the entrance to the

twin capillary adopter. Exercise care so that the adapter is not oxidized internally by over heating. Telescope the bottom evaporator re

flector shroud over the top shroud.

g. Unsweat the two capillaries at the evaporator.

Be careful when using a torch near the evapo rator as the evaporator tubes are soft soldered

to the freezing columns. h. Unsweat the suction line at the evaporator. j. Disconnect the oil return line from the end bell

of the compressor motor by loosening the flare

nut at the valve.

d. Start the machine. e. When the amount of gas coming from the 1/4"

copper tube has decreased appreciably, im merse the copper tube into a can of refriger ation oil.

f. The gas being expelled will bubble up through

the oil.

g. After bubbling has ceased it can be assumed

the refrigerant system has been evacuated.

h. Remove the tube from the gauge port, and with

the compressor still operating screw in the

gauge port plug. Then backseat the discharge

shutoff valve and turn off the compressor.

Add refrigerant to the system as described in Sec tion 4 "Refrigerant Charge".

9. CONDENSER CLEANING AND REPLACEMENT

FLUSHING THE CONDENSER WATER CIRCUIT

Scale deposits on the inside of the condenser water

circuit can significantly reduce the condensèr's capacity and increase the water consumption. If the scale becomes too heavy, the head pressure will increase because of poor heat transfer inside the condenser.

k. Remove the compressor. The complete assembly

can then be removed. Refer to Section 8 and 4 for evacuating and recharging instructions.

8. DRYER REPLACEMENT

The original dryer has flare connections. See Fig.

10. Slowly bleed the refrigerant charge as follows: a. Make sure the suction shutoff valve is back-

seated. b. Remove one of the gauge port plugs. c. Slowly turn the shutoff valve off backseat to

bleed the refrigerant charge. Bleed slowly

to prevent condenser freezeup.

Evacuate the refrigerant system as follows:

a. Backseat the suction shutoff valve. b. Frontseat the discharge shutoff valve.

c. Remove one of the discharge gauge port plugs,

and connect a piece of 1/4" copper tubing about '1 foot long to this gauge port.

Obtain the equipment shown in Fig. 15.

Set up the equipment as shown in Fig. 16.

Proced ure

1. Remove the front panel and turn the selector switch to "Off. "

2. Close the water supply line shut-off valve, and assemble the equipment to the unit.

3. Mix a solution of inhibited muriatic acid and wiater in one of the pails. ADD THE ACID

TO THE WATER. Mix 1.5 quarts of acid into

3.5 quarts of water.

4. The level of solution in the pail should be

at least 2 " below the bottom of the pump motor.

AVOID SPILLING ANY SOLUTION.

5. Start the pump and allow it to run 20 minutes,

or until the solution draining back to the pail contains no foam.

6. While running the pump, mix a solution of 1/4 lb. of baking soda in 8 quarts of water.

26H-57PD

Page 33

Carrier

SERVICE

26H

7. At the end of 20 minutes, turn the pump off and place the pump in the soda and water solution.

8. Start the pump and allow the soda and water solution to circulate for 15 minutes.

9. While the neutralizer is being circulated, fill

the pail containing the acid solution with

water and then empty the pail in an open drain.

10. Rinse the pail and fill it with water.

11. Turn the pump off and place it in the pail of clean water.

12. Start the pump and allow it to run for 5 minutes.

13. Turn the pump off and break the flare or hose connection at the pump.

3 A I x| FLARE COUPLING IS USED TO

CONNECT THE TUBING FROM THE PUMP

OUTLET TO THE CONDENSER INLET

14. Lift the pump out of the water, then lift both lines to allow the lines and condenser to drain into the pail.

15. Break the connection at the condenser inlet.

16. Reconnect the condenser inlet line to the

water regulating valve.

17. Break the connection on the condenser outlet and reconnect the permanent drain line.

18. Turn on the shutoff valve in the water supply line.

19. Turn the selector switch to "On" and check the connections to see if they ore tight.

20. Remove the cleaning equipment and clean around the machine.

TO SAVE TIME, TWO 10 QUART PAILS ARE USED; ONE FOR THE ACID

SOLUTION AND ONE FOR THE SODA

SOLUTION.

6 INHIBITED MURIATIC ACID MIXED WITH

WATER (1.5 PARTS ACID TO 3.5 PARTS

WATER) IS RECOMMENDED FOR THE

DESCALING SOLUTION.

<®>

iMHieifci*

Mutintic

ACl*

NOTE i AN ALTERNATE TO USE IN PLACE OF THE 8 LENGTH OF COPPER TUBING

AND THEiSWEAT TO|'FLARE COUPLING, IS TO USE AN8' LENGTH OF T RUBBER HOSE AND 2-¿HOSE CLAMPS

FIG. 15 - REQUIRED FOR CONDENSER CLEANING

AN 8 LENGTH OFf COPPER TUBING, FLARED AT EACH END IS CONNECTED TO THE PUMP OUTLET THE OTHER END IS CONNECTED TO THE CONDENSER INLET AT THE WATER REGULATING VALVE.

5 A 15 LENGTH OF§ COPPER TUBING

FLARED ATONE END IS CONNECTED TO THE CONDENSER OUTLET FOR RETURNING THE SOLUTIONS OR WATER BACK INTO THE PAIL.

7 BAKING SODA MIXED WITH WATER

(4lB. SODA TO 8QTS. WATER) IS RECOMMENDED FOR NEUTRALIZING THE ACID.

I THE STANDARD 26 ICE MAKER WATER PUMP

FITTED WITH A ^ SWEAT TO FLARE COUPLING IN ITS OUTLET IS USED FOR CIRCULATING THE SOLUTION, NEUTRALIZER

AND WATER.

26H-57PD

Page 34

ACID DISSOLVES THE SCALE

FIG. 16 - CONDENSER CLEANING PROCEDURE

CONDENSER REPLACEMENT

The condenser is mounted in a vertical position on the left side of the unit.

a. Close the water supply valve before removing

the condenser.

b. Remove front, top and left side panels.

c. Slowly bleed refrigerant from the system as

described in Section 8.

d. Unsweat all refrigerant tubing connections

while the suction valve is still open. All of these joints are phos-copper.

e. The condenser is held by a strap screwed to

the unit frame. Lift the condenser up and out.

f. After replacing the condenser, evacuate and

recharge the system as described in Sections 4 and 8.

26H-57PD

10. EVAPORATOR REPLACEMENT

Bulged freezing columns may be indicated by "ex

cessive " defrost time; 4-5 minutes before the first ice drops and 4 minutes or longer before all the ice drops is considered excessive defrost time.

yo determine if columns are bulged remove spreader plates (see Fig. 17), and place light under freezing

columns and observe from the top of each column.

If several columns are seriously bulged and unit

has excessive defrost time even with adeguate

charge, the evaporator assembly should be re

placed.

REPLACEMENT PROCEDURE

1. Remove front, top and side panels.

2. Slowly bleed refrigerant charge as described in Section 8.

Page 35

Carrier

SERVICE

WATER SPREADER IN POSITION

WATER SPREADER REMOVED

NOTE FORMED PROJECTION FOR SPACING SPREADER

26H

FIG. 17 - WATER SPREADER PLATES

During the period of "Blowing the charge", re

3. move screws and clamps from each side of lower evaporator shroud, then lift shroud up wards as far as it will go. Capillary joints are accessible on right side of unit.

4. Remove water distributor header.

5. After refrigerant charge is "blown", carefully melt capillary, suction header and hot gas

header joints. Pull joints apart while applying

heat. On the left side of evaporator, melt water trough overflow and safety overflow which are "soft solder" joints and require very little heat.

CAUTION: The capillary suction header and hot gas header joints are Phos-copper which melts at approximately 1400°F. Care should be taken not to "over-heat" the Phos-co joints when melting or

making a connection.

6. Remove evaporator support bracket screws and lift evaporator straight up.

8. Position replacement evaporator in unit; fasten supporting brackets.

9. Make all connections. If Phos-co is not avail able, silver solder maybe substituted. Pliers may be used to guide capillary in place while soldering. Make sure that no hard solder plugs capillaries.

10. Fasten water header in place.

11. Check oil level of compressor. Refer to Sec tion 6.

12. Evacuate the refrigerant system. Refer to Sec tion 8.

13. Add refrigerant to system. Refer to Section 4.

14. Machine must be operated for many cycles to check freezing and defrost time. While unit is operating, check for refrigerant leaks. When unit is satisfactory, replace evaporator shrouds and panels.

7. Remove all spreader plates. Remove all scale and clean. Place spreader plates in new evaporator assembly.

15. When replacing the evaporator assembly, the operation of the main control thermostat and

the safety overflow switch must be checked.

35 26H-57PD

Page 36

26H

n. FLOAT VALVE

SERVICE

3. FREEZING WATER CIRCUIT

The float valve, see Fig. 18^ meters the make-up water which is circulated to the freezing columns and can be observed by removing the front panel and inner access door.

The float valve can be adjusted by loosening the wing nut and the set screw and adjusting the con necting arm. Raising the float will raise the water

level, and lowering the float will lower the water level. The water level should be approximately 1/2" below the top of the siphon standpipe for

the 26H5 units, and 3/8"below for the 26H3 units.

KNURLED FLAT END OF FLOAT, ARM FOR BEARING ON ELBOWN

(LENGTHWISE KNURLS)

WINS SCREW FOR FASTENING FUDAT

ARM TO ELBOW

Carrier

SPLASH-HOOD

CAUTION: After adjusting the float with the set screw, tighten the wing nut. If the float works loose, water will overflow through the siphon stand

pipe and cause an extremely long freezing time and

a continuous siphoning action. To replace the float valve;

a. Close the water supply valve.

b. Remove front panel and inner access panel. c. Remove float from valve by taking out wing

nut. This float valve can be removed from

the front by turning the valve body counter

clockwise.

WATER HEADER

FIG. 18 - FLOAT VALVE ASSEMBLY

To inspect the valve seat and orifice, remove the

stainless steel pin, freeing the valve arm from the

body.

12. WATER DISTRIBUTOR

The water distributor feeds the freezing columns and should be checked to insure that the discharge nozzles are clear. Water flow from all ports should be approximately the same. To inspect the headers,

disconnect the rubber hose (s). Remove the three screws which hold the header assembly and sup

port brackets in place and lift the header from the

top of the machine compartment. See Fig. 19.

SCREW HOLE SCREW-

MACHINE

26H-57PD

FIG. 19 - WATER DISTRIBUTOR

Page 37

SERVICE

13. WATER REGULATING VALVE ADJUSTMENT

A 3/8" water regulating valve is used to control the water flow through the condenser. This valve is located in the inlet side of the condenser water

system. For best operation and maximum ice pro duction the head pressure should be maintained at approximately 125 PSIG for 26H5 and 130 PSIG for

the 26H3. This is equivalent to approximately a

20° rise in condenser water temperature. Head pressures below 125# and 130# respectively will

increase the harvesting cycle due to insufficient

hot gas for defrost. Head pressures above those

recommended will increase the freezing time and

may overload the compressor. Adjust the water re

gulating valve by turning the notched ring. See

Fig. 20. A quarter turn will change the head pres

sure approximately 5 PSIG.

A defective water regulating valve can be removed

without breaking the high pressure connection by

removing the screws which hold the bellows bonnet

in place. If it is necessary to replace the bellows, pump down the compressor as explained in Section 4.

26H

15. WATER SYSTEM CLEANING

The frequency and the amount of cleaning will vary depending on the mineral content of the water supplied.

During the freezing cycle, only pure water is frozen

into cubes and removed from the water circuit. Accumulated impurities remain in the system and may eventually cause scaling. Various water softeners are on the market but none of these, ex cept a costly total demineralizing process, are suf ficiently effective.

The concentration of minerals is decreased by the

siphon heat interchanger. The sump is flushed out at the end of each freezing cycle and filled with fresh water. This flushing process does not eliminate the necessity of cleaning the unit, but

it does decrease the number of times per year this

cleaning is necessary.

In some localities the amount of suspended matter

in the supply water may cause trouble. To cut down

the amount of impurities entering the system, in

stall a water filter in the water supply line before

the interchanger. The filter should be checked at

each inspection call and the filtering cartridge re

placed if it obstructs the flow of water.

14. WATER TREATMENT

At least once a month the water compartment should be flushed by removing the siphon standpipe. When extensive cleaning is required, proceed as follows:

1. Turn off the ice maker; close off the water supply line.

2. Remove the access panel and the inner access door.

3. Remove the ice deflector.

4. Drain the water pan.

5. Inspect the parts removed and the water pan for signs of scaling. The amount of scaling can be decreased by more frequent flushing.

6. Remove the top panel and water header to check for deposits on the spreader plates.

7. If a water filter is used, check the filter ele

ment for dirt or other foreign deposits. Re place the element if necessary.

8. Clean the water pan panels and deflectors by

using a wire brush, soap and hot water.

9. The spreader plates can usually be cleaned

by using a knife to dislodge the scale. If this

is not possible, then the spreader plates must be removed for cleaning.

26H-57PD

Page 38

26H

SERVICE

Carrier

10. In cases where light deposits of scale are found circulate a vinegar and water solution

(1 quart of vinegar to a full water pan) and operate the water pump separately by turning the selector switch to "Pump" position. Cir culate 20-30 minutes, drain, open the water supply line and flush twice.

11. For heavy scale conditions, first remove all ice from bin. Mix inhibited muriatic acid solu tion as described in Section 9.

Circulate approximately 20 minutes, drain and flush.

12. Then circulate Baking Soda solution for 10 minutes, drain and flush.

13. To clean algae from the water system, use hy drogen peroxide mixed with equal parts of water. Circulate for 20 minutes. Pour some solution into overflow trough and flush the system.

14. Start up the unit and time it through one com plete cycle. While doing this, clean out the bin by using soap and warm water or a cleaning solution approved by local health codes. Flush out the bin after cleaning.

15. Catch the ice from the first harvest and throw it away. At every inspection, steps 1 through

7 should be followed. Steps 8 through 15 should be followed if required. Local health codes should be observed.

The oiling instructions are prominently displayed on the pump:

OIL TWO BEARINGS EVERY 3 MONTHS

USE NO. 20 UNTREATED MOTOR OIL DO NOT OVER-OIL DO NOT LET OIL GET INTO THE WATER

17. TESTING AND REPLACING THE WATER PUMP

The water pump, with a built in overload, is powered by a 1/30 HP totally enclosed motor and circulates approximately 10 gallons of water per minute in the 26H5 and 5 gallons per minute in the

26H3. The 26H5 pump hafe two outlets and the 26H3

one which causes the difference in the rate of flow. Remove the front, top and left side panels to gain

access to the pump. See Fig. 2K To test, attach a test cord directly to the pump leads. To replace, remove the mounting plate screws and splash de flector panels and lift the pump assembly out of the water compartment.

CONDENSER

.MAIN CONTROL

CUT OUT CAPILLARY

When cleaning the water system, pour some of the

solution into the evaporator overflow trough and allow it to flow into the overflow well. Allow it to remain in the overflow well for 20 - 30 minutes, then flush with the same solution used to flush the water system. Check the main control capillary and wipe if necessary.

16. WATER PUMP LUBRICATION

The water pump is equipped with orl tubes and

should be oiled with a few drops of SAE 20 motor

oil, every ninety days.

CAUTION: DO NOT drop oil in the water pan - it

will adversely affect the freezing process.

26H-57PD 38

EVAPORATOR

WATER

DISTRIBUTOR.

HOSE

WATER PUMP.

FIG. 21 - LEFT SIDE OF 26H3 MACHINE SECTION

PANELS REMOVED

VER FLOW WELL

DRIP PAN

DRIP PAN DRAIN

Page 39

SERVICE

26H

18. VARIATION OF CUBES

Usually 18% of the cubes will vary from the standard

as follows:

1. Due to the slight taper of the freezing column the cubes formed in the bottom will have a larger external dimension than those formed at the top.

2. The top and bottom cubes in each column will have a slightly larger hole than those in the center.

3. The first column to freeze nearly shut, thereby causing water to overflow and end the freezing cycle, will produce one or more cubes with smaller holes.

19. CRUSHER

CRUSHER GUARD

The same crusher guard assembly may be used for bins with and without partitions. It is necessary,

however, to adjust the position of this assembly depending on whether or not the partition is used. Refer to Fig. 22 which shows the crusher guard and also explains how to install it.

CRUSHER LUBRICATION

The crusher and the crusher motor require periodic lubrication. Fill the cups with SAE 20 oil (approxi mately every 6 months). The crusher is equipped with oilite bearings both front and rear, and since the rear bearing carries the load, there is an oil tube leading to it. When oiling the crusher motor, put 10-15 drops of oil in the oil tube leading to the crusher rear bearing.

REMOVAL OF CRUSHER

The crusher assembly is removable from the front

of the unit. First open the main disconnect switch.

Remove the control knobs, both front and side panels, the inner access door, ice deflector, splash

curtain and the side baffles. Remove the galva nized channel and the screws along the top edge of the crusher. Remove the screws at the base of

the crusher. A removable stainless steel clip is used to hold the water pan and ice crusher housing together.

When replacing the crusher switch-knobs,make sure they are positioned to agree with the printed decal markings.

HOLE I (LOCATE HERE FOR BINS WITHOUT PARTITION)

LOCATE HOLE 2 HERE FOR BINS WITH PARTITION

fig. 22 - CRUSHER GUARD ASSEMBLY

HOLES 3 a 5-LOCATE WITH HOLES ON UNDERSIDE OF

BIN TOP FOR BINS WITH

PARTITION-

HOLES 4 86 (ON END OF TAB NOT SHOWING) LOCATE WITH HOLES ON UNDERSIDE

OF BIN TOP FOR BINS

WITHOUT partition-

26H-57PD

Page 40

26H SERVICE

Carrier

TROUBLE ANALYSIS

To have the crusher operate, the following condi tions are necessary:

1. Three-position selector switch in "Pump" or "On" position. Power supply to unit OK.

2. Safety switch in closed position. Panel must depress switch arm to make contact.

3. Damper switch in "Crushed"position.

4. ELECTRICAL CIRCUIT

20. CHECKING VOLTAGE

Check the outlet voltage. It should be within 10% of the nameplate voltage. Try to make this test when the voltage is likely to be the lowest; that

is, when the power line is carrying the heaviest

load. Low voltage may prevent the unit from starting, or

if it is running, may cause the compressor to over

heat and cutoff on the motor overload. Low voltage

can also result in bulged evaporator columns due

to failure of the hot gas solenoid to open.

4. Main control in harvest cycle.

NOTE: Early models used a relay, and crusher ran whenever unit was off on bin thermosiat. On later

units crusher runs when unit is off on bin fhermostat only, unfil main control warms up and goes to

"F reeze " position.

If the above conditions are fulfilled and the crusher

still does not operate, the wiring and the various controls should be checked with a test light.

with one lead from the power supply. CAUTION: In the "Off" position the switch cuts power from only one of the power supply leads. Therefore, open fhe disconnecf switch when servicing the unit.

If fhe main confrol is in fhe "defrost" position the water pump will not operate when the selector

switch is in the "pump"position.

To gain access to the switch terminals, first re move the indicating knob and hexagonal nut which secures the switch to the bracket. Check the operation of the switch with a test lamp.

Refer to Section 13 in the Installation Section con

cerning a voltage transformer for increasing fhe

power supply to the unit.

21. LOOSE TERMINALS

Loose terminals will cause erratic operation. With the disconnect switch opened, check the terminals of the selector switch, relay, thermostats, solenoid valve, water pump and compressor to make certain they are tight.

22. SELECTOR SWITCH

A rotary type selector switch is located under the the hinged nameplate. This switch is in series

26H-57PD

23. CONTROL BOX

COMPRESSOR TERMINAL BOX 26H3

The compressor terminal box houses the starting relay, the motor compressor terminal block, and the motor overload. To gain access to the box interior, remove the slotted screw in the front of

fhe box cover.

26H5

The confrol box houses fhe sfarting capacitor and fhe sfarting relay. It Is located at the front of fhe machine.

To gain access to the box interior, unscrew the wing nut and slide the door to the left.

Page 41

Page 42

26H-57PD

Page 43

Carrier

SERVICE

26H

3 POSITION

ROTARY SW.

OVERFLOW SAFETY

SWITCH (MAN, RESET)

26H5-I3I

BIN a H.RC.

H CONDUIT

BOX

FIG. 25 - 26H5 UNIT 115-230 VOLT, 60 CYCLE, 1 PHASE

WITHOUT CRUSHER

26H-57PD

Page 44

WITH CRUSHER

26H-57PD

Page 45

Page 46

26H

SERVICE

Carrier

26H-57PD

FIG. 28 - 26H5 UNIT 230 VOLT, 50 CYCLE, 1 PHASE

WITH CRUSHER

Page 47

Carrier

SERVICE

26H

24. CAPACITORS

26H3

A 158-191 MFD capacitor, located on the compressor above the terminal box, is used on the 26H3 115V

compressor.

26H5

A 243-270 MFD starting capacitor is used oh the

115 volt units. A 53-64 MFD capacitor is used on

the 230 volt units.

A capacitor may fail because of a shorf circuit or an open circuit. If short circuited, the starting current will be excessive.

The compressor may not start and will be responsi

ble for blowing fuses or dimming lights. If fhe

capacitor wiring is open circuited, no current will reach the starting winding and the compressor will not start.

To check the starting capacitors, disconnect the

old capacitor and substitute a new capacitor. If

the unit storts,the old capacitor is faulty and should be discarded.

25. RELAY

26H3

The current type relay is housed in the compressor

terminal box. It permits the compressor starting

winding to be energized for abouf 3/5 of a second

when the compressor is started. The locked rotor

surge of current energizes a magnetic coil closing

a set of contacts and completing the starting ca

pacitor circuit to the compressor starting winding.

As the compressor speed increases, the initial

locked rotor current surge decreases, the magnetic

coil is de-energized, the contacts are opened, and the starting capacitor circuit is removed from the compressor starting winding.

26H5

The voltage type relay energizes the starting wind

ing of the motor when the compressor is started

until it comes up to speed. After the motor comes

up to speed, the windings induce voltage back into

the starting circuit of the relay. This "back EMF"

is passed through a magnetic coil, which opens the

relay contacts an d cuts off the power to the starting

winding. When the compressor is stopped, a spring

pulls the contacts together again.

RELAY CONTACTS STUCK OPEN

If the relay fails with the contacts open, no current will reach the starting windings. The compressor will hum, but will not start. After 15 or 20 seconds, the motor overload will cut off the power to the com pressor. After approximately 30 seconds, the over

load will turn the power on again. If the relay

contacts are still open, the overload will cut off the power again after another 15 or 20 seconds. This cycle will repeat itself until the condition is remedied. Replacement should be made immediately since continued cycling may cause serious damage

to the unit. To test for relay contacts stuck open,

connect the power supply and turn the selector

switch to the "on" position. Momentarily touch a jumper to relay terminals 1 and 2 on the H5, (3 and

the unmarked terminal on the H3) until the com

pressor has a change to come up to speed. CAU

TION: Do not keep the jumper across these termi

nals for more than an instant; otherwise, the start

ing winding will be damaged.

RELAY CONTACTS STUCK CLOSED

If the relay fails with the contacts closed, the

starting windings will continue to be energized

after the compressor has come up to speed. The

compressor will start, but will run with a loud grinding hum. After approximately eight seconds,

the overload will cut off the unit. Approximately

30 seconds later the overload will turn the power

on again. If the relay contacts still fail to open, the overload will cut out after another eight seconds. This cycle will repeat itself until the condition is remedied.

To test for relay contacts which remain closed, remove the nut from ferminal "S" on the compressor

terminal board. Connect the unit to the power

source and turn the selector switch to the "on"

position. As soon as the compressor has started,

immediately remove the wire from terminal "S". If removal of the wire makes the unit operate quietly, and without stopping, while attaching the wire makes the unit operate noisily and cut off on the overload, then the relay contacts are stuck closed and the relay assembly should be replaced.

26. COMPRESSOR MOTOR OVERLOAD

Remove the top panel and the top of the compiessor terminal box to reach the overload in the 26H5. The 26H3 terminal box is accessible simply by re moving the front panel and terminal box cover.

26H-57PD

Page 48

26H

SERVICE

Carrier

■^1—

This thermal overload element will open the cir cuit when overheated and cut off power to the com pressor. When the compressor cools off, the thermal element cools slowly and starts the compressor again. Thus, an overloaded compressor will stop for an interval, then restart and, after running awhile, will stop again. If a unit is starting and

stopping due to the motor overload, immediate steps

should be taken to locate and remedy the cause, since continued cycling may damage the compressor. Overloading may be due to low voltage, loose termi nals, faulty relay, or causes connected with the re frigerant circuit.

It is possible to determine if current is flowing through the motor overload by testing at the com pressor terminals. Turn the selector switch to

"on", and place the prongs of a current tester on terminals "R"and "C"of the compressor. A light will indicate the current is flowing through the overload and that it is functioning properly. No light when the compressor is cool (approximate room temperature) will indicate that the overload is stuck open and should be replaced. No light when the compressor is hot will indicate that the over load may be functioning properly, but has cut out due to overloading the compressor.

27. CRUSHER ELECTRIC CIRCUIT

Figs. 24 and 26 are schematic wiring diagrams of

the 26H3 and 26H5 crsuher-equipped Ice Makers

respectively.

CRUSHER MOTOR

This is a 1/6 horsepower 115/230 volt motor.

Oil twice a year with standard SAE 20 motor oil.

To replace the motor, remove the crusher assembly

as explained in Section 19. The motor is held in

place with two bolts and a retainer plate. When

mounting the replacement motor, carefully line up

the two pulleys and tighten the belt so that it can

be depressed 1/4" with the pressure of one finger.

The access door has a printed warning to open the main disconnect switch v/henever servicing this unit. Do not ignore this warning! The safety switch is provided for added protection.

This switch can be removed by removing two of the machine screws which hold it in place and dis connecting the wiring. When replacing this switch, be sure that the front panel depresses the safety switch arm to close the switch contacts.

DAMPER SWITCH

The damper switch opens the circuit to the crusher motor when engaged by an arm of the damper link age. When the damper is moved to the "crushed" position,the damper switch completes the crusher wiring circuit.

28. CONTROLS

MAIN CONTROL THERMOSTAT

A Ranco two-bulb, single-pole double-throw switch

is used on the 26H series Icemakers. This is an

interlocking type of control; that is, when it cuts

out on the bulb in the overflow well, it can cut

in only from the bulb on the suction line and vice

versa. The cut out side of this control is set at

38°, and the adjustment is locked. The cut in side

of this control is adjustable, and the setting should

be raised if the time between the dropping of the

last ice cube and the start of the freeze cycle is

less than 30 seconds. The setting may be lowered

if the time between the dropping of the last cube

and the start of the freezing cycle is mo;e than

1-1/2 minutes. Unless maximum capacity is re quired, an overrun time of 1-1/2 minutes to 3 minutes is not serious enough to warrant adjusting the control. The cross ambient bulb on the cut in side provides control by bulb only, thus the capil lary and bellows are not affected by ambient temper ature and this control will operate properly at am bient air temperatures of between 50° and 100 °F.

CAUTION: Excessive belt tightness will cause

the rear crusher bearing to overheat, lose its'oil and become scored.

SAFETY SWITCH

A normally-open safety switch is in the crusher

wiring circuit. When the front panel is removed, this

switch breaks the circuit to keep the crusher from

operating and possibly causing injury.

26H-57PD

This thermostat cycles the unit from freezing to defrost. At the end of the freezing cycle,water from the freezing columns overflows into the con trol bulb well. When this happens, the cold water actuates the thermostat, which stops the water pump and energizes the hot gas solenoid valve, thus starting the defrost cycle. The capillary leading from the overflow well to the Ranco control actuates only the cutout side of this control. As

Page 49

Carrier

SERVICE

26H

the hot gas passes through the hot gas solenoid

into the evaporator and then to the accumulator, it

warms the cut out capillary which closes the cut out side of the control. The hot gas also warms the suction line. When the vertical portion of the suction line leading from the accumulator, to which the cut-in bulb is attached, becomes warm, it actu ates the cut-in side of the control which closes the hot gas solenoid valve and starts the pump.

PROCEDURE TO CHECK OUT MAIN CONTROL

THERMOSTAT

1. Shut off machine and allow bulbs to warm up (about 5 minutes). Platens* should rise to

top position. If they do not, a bulb has lost its charge.

2. Turn on machine. Right platen should drop in a few minutes. If it does not, check for low refrigerant charge.

3. Thirty to forty minutes after start of freezing cycle, water should back up into the overflow trough and drop into the overflow well. Left platen should drop, pump stop, and solenoid open. If not, check for restricted water path to

control bulb well, algae or dirt in well, and

proper placement of left control bulb element

in well.

4. The left platen should rise soon after the

start of the defrost cycle. Right platen should rise a few minutes later and switch machine to next freezing cycle. Condenser water should not flow during defrost cycle. Check the overrun time.**

If the controls ore set for an over run time of 90-

150 seconds at a temperature of 50° Air and 45° Water, an increase in Air temperature to 80° and an increase in Water temperature to 80° will result in an over run time of 30 - 45 seconds.

29. SAFETY OVERFLOW

The safety overflow is installed on a 26H Icemaker to protect the machine against bulged columns. If the machine fails to go into the defrost cycle, more tubes in the evaporator will overflow, causing the water level in the overflow trough to rise and run out the upper overflow connection into the float chamber, thus causing the float to trip the machine off.

* Platens - Hinged plates (inside control) actu

ated by control bellows.

** Overrun time - period between falling of last

ice cube and start of next freezing cycle. Should

average 1/2 to 1-1/2 minutes. To increase this

time, raise the setting of the right hand (cut-in)

element.

WARNING:

High ambient temperature, high water temperature and/or high head pressure will result in a reduction in over run time. If the main control is set at low or normal temperatures and pressures, allow suf ficient over run time to avoid trouble in case of an increase in any of the conditions mentioned above.

FIG. 29 - FRONT OF 26H5 MACHINE SECTION

30. BIN THERMOSTAT

The bin thermostat shuts off the unit when the storage compartment is full of ice. See Fig. 30. It is a single-pole single-throw switch in series

with one lead from the selector switch. The thermo stat is accessible after removing the front panel and is in the same casing as the high pressure switch. When servicing the control, remove the control with the holding bracket. It is possible to disconnect

26H-57PU

Page 50

26H

SERVICE

Carrier

THERMOSTAT CAPILLARY WITHIN RUBBER HOSE INSULATION

INSULATED SECTION OF BIN THERMOSTAT CAPILLARY-

BIN THERMOSTAT

BULB

FIG. 30 - RIGHT SIDE OF MACHINE SECTION

the bin thermostat power element from this control and change the control mechanism without disturbing the refrigerant system. If the thermostat bulb is damaged, it also can be replaced separately. The

unit will not operate if the thermostat bulb has

lost its charge.

The control bulb of the bin thermostat is mounted on a bracket near the top of the storage compart ment, or on the bin partition if one is used.

When the ice in the compartment comes in contact with the bulb or capillary, the unit shuts off and remains off until some of the ice is removed. This control can be checked by holding two ice cubes in contact with the bulb clamp as shown in Fig. 31. The unit should shut off in 30 to 45 seconds. The

cut-in point should be approximately 41° for most installations, and a differential of 7° should be maintained.

FIG. 31 - METHOD OF CHECKING BUNKER

THERMOSTAT SETTING

adjust the differential, remove the knurled knob and

small holding plate at the top of the control, and

turn the middle adjusting screw.

CAUTION: The room ambient temperature must be

above 50 °F for this control to function properly.

WITHOUT PARTITION

The bin thermostat should be clamped to the back

of the bracket as shown in Fig. 32. The clomp is attached to the bracket at the bottom hole for 240# bins and at the top hole for 160 and 100# bins. The

thermostat capillary should run up to the top of the

bin liner along the back of the bracket to protect it

from water and ice coming from the crusher.

The cut-in and cut-out temperatures may be adjusted

by turning the knurled knob on the control. When

turning this knob, the differential remains fixed.. To

26H-57PD

FIG. 32 - SKETCH SHOWING BRACKET AND

BIN (WITHOUT PARTITION).

Page 51

Carrier

WITH PARTITION

Attach brackets to partition as shown in Fig. 33

and install the partition, Fig. 34. Run the capillary

along the top of the bin liner, down the crushed ice side of the partition and then over the top of

the partition to the cube side.

SERVICE

26H

31. HIGH PRESSURE SWITCH

This switch stops the unit if the head pressure ex

ceeds 220 - 7 PSIG. It is located in the same casing as the bin thermostat. This cut-out point is set at the factory and cannot be changed in the field.

FIG. 33 - SKETCH SHOWING BRACKET

NOTE: On start up the unit may cycle on and off several times due to high head pressure. This is normal. The number of times the unit cycles can be decreased by turning the unit to "pump" for a half minute and then restarting.

240, 160 a 100 LB. BINS

In replacing this switch the entire control must be changed. Pump down the compressor as explained in Section 4.

ATTACHED TO PARTITION

FRONT

FIG. 34 - SHOWING PARTITION INSTALLED IN BIN

26H-57PD

Page 52

26H

SERVICE

Carrier

32. TESTING THE SOLENOID VALVE

The solenoid valve passes hot discharge gas to the

evaporator during the harvesting portion of the cycle. It is energized by the main control thermo stat only during the defrost cycle.

If, upon completion of harvesting, the valve fails to close or closes only partially, the discharge side of the valve will remain warm and little or no freezing will occur in the evaporator. If, on the other hand, the valve fails to open, no harvesting will occur and the ice cubes will remain frozen in the evaporator. To determine whether power is reaching the valve, connect a test light across the leads to the valve. A lighted lamp indicates power

is supplied to the coil. The opening and closing of the valve can be heard when standing next to the machine. This will indicate whether the valve is operating but will not prove whether the valve is

seated. A hissing noise at the valve indicates a poorly seated valve. Poor seating of the valve will result in excessive freezing time. Malfunctioning of the valve may also be due to low voltage or poor electrical connections.

The solenoid coil (and the valve stem on Sporlan Valves) can be replaced without taking the valve body from the system; however, if necessary, the entire valve can be removed by slowly bleeding the refrigerant charge as described in section 8, and unsweating the connections. Dismantle the replace ment valve and cover the body with wet cloths be fore brazing to prevent damage to the valve. Silver

solder is used on the connections. State reguired

voltage when ordering a replacement solenoid valve

or coil since the 115 volt and 230 volt coils are

not inerchangeable.

WINTERIZING ICE MAKERS

For proper operation of the controls, any units which

are operated through the winter season should be located where the temperature will not fall below 50°. Where a unit is shut down during the winter

season, certain precautions are required if the tem perature surrounding the unit falls below freezing.

The unit may be damaged if the following precau tions ore not taken:

1. The Ice Maker should be cleaned and descaled before shutting down for the winter.

2. Disconnect inlet water supply line. Drain

water pan by removing siphon standpipe.

3. Turn selector switch and start unit; run until

compressor goes "off" on high pressure cutout. This will cause the water regulating valve to

open fully, permitting water to drain out by gravity.

4. Disconnect flare connection on outlet side of

water regulating valve. Some water will drain out.

5. To prevent any trapped water from freezing

when unit is not used during winter months, it is necessary to "blow out" the circulating water lines. This may be done by connecting a small refrigerant Freon drum to the dis connected flare nut. Open refrigerant drum

slightly and admit small amount of gas. The

gas pressure will blow out the trapped water.

6. Disconnect refrigerant drum; reconnect flare

nut to water regulating valve. Leave water

supply line disconnfected. The unit should be tagged, stating in what condition the ma chine is left so that next year a service man

will know exactly what should be done to start

the unit up.

7. The "trapped" water in the main control over

flow well should be blown out. Blow through

the top of well where the control capillary

enters.

•8. Remove drain plug from siphon interchanger.

9. Make sure disconnect switch is in "off" posi

tion. Remove the fuses, or otherwise dis connect the power supply.

10. After a long period of shut down or upon origi nal installation. Ice Cube Makers should be

observed through two complete cycles before the mechanic leaves the job.

26H-57PD

Page 53

Carrier

SERVICE

ICE MAKER SERVICE CHECK LIST

26H

NAME

ADDRESS

MODEL _

1. Quality of cubes Shells

2. Run time Freeze

3. All controls operate satisfactorily.

Main Control Safety Overflow Bin Thermostat High Pressure Cut-Out Yes No

Tested for leaks

Refrigerant Yes

________

_____________

min. Defrost

SERIAL

Normal

_________

__________

DATE

LOCATION OF BUILDING

Sticks

min. Over-run

Yes Yes No Yes No

___________

________

min.

Water Yes No

Oil

Evidence of refrigerant and/or water lines rubbing Yes No

Siphon standpipe operates properly Yes

6. Plastic curtain (does it allow water to splash into bunker?) Yes

Crusher operates satisfactorily

Yes No

Yes

53 26H-57PD

Page 54

26H

SERVICE

SERVICE ANALYSIS 26H5 AND 26H3

UNIT WILL NOT OPERATE

Carrier

OBSERVATION

1. Compressor and water pump will not start.

2. Compressor and water

pump cycle intermittently

POSSIBLE CAUSE REMEDY AND REFERENCE

Power off Check main sv^itch, fuses and

wiring

Low voltage

Loose electrical connec tions or faulty wiring

Bin thermostat capillary broken

Faulty selector switch Off-on safety switch High pressure switch and

bln control contacts open

This is normal at start up

Condenser may be plugged or dirty

High pressure switch has opened circuit

Check building circuit and voltage at main panel

Check wiring

Examine control bulb and replace if broken

Repair or replace Check for ice in tubes Check for low ambient temperature,

incorrect setting, faulty switch,

ice on bulb

Start and stop machine at 2'

minute intervals several times Clean condenser; high pressure

switch should open at 175 psig head pressure. Minimum water pressure 20 psi. Check water supply.

SECTIONS

6 & 20

20 & 27

30 & 31

Installation

5,9, & 31

3. Compressor Cycles water pump runs.

26H-57PD

Plugged capillary

Low voltage , Voltage should be within plus

Defective starting relay Check wiring and operation.

Overload switch cycles Compressor

Compressor motor shorted

List evaporator shroud; check for frosting of evaporator tubing coil. Replace accumulator assembly which includes capillaries

or minus 10% of nameplate voltage

Minimum low voltages are 104V for the 115V unit and 207V for the 230V unit

Replace if necessary Determine cause of overload,

may be dirty condenser. Normal for 26H3 compressor on start-up

Replace compressor

7 & 10

Installation

20 & 25

Page 55

SERVICE

26H

OBSERVATION

4. Compressor runs- water pump IS off.

5. Water pump runs - com pressor off.

6. Water pump runs -

compressor hums

POSSIBLE CAUSE REMEDY AND REFERENCE

Faulty selector switch Repair or replace

Pump motor inoperative or out on pump motor overload

Failure of main control to energize pump motor con

tacts Overload switch has opened

circuit Selector switch on "pump"

Faulty selector switch

Compressor motor burned out

Loose terminals

Compressor stuck Faulty relay (opened) Faulty starting capacitor

Check wiring and voltage. Check with test cord. Repair or replace pump and motor assembly.

Replace control

Check compressor overload

Turn to "on"position

Replace selector switch

Replace compressor motor

Check and tighten

Replace

Check and replace

SECTIONS

Installation

Fig. 17

6 25 24

7. Unit will not operate continuously - blowing

fuses.

8. Long Freezing Cycle

(30-40 minutes, normal).

ERRATIC OPERATION

Compressor motor faulty

Low voltage Check voltage and external

Faulty ice crusher motor

Surrounding air temperature high and warm supply water temperature

Faulty compressor Repair or replace Leaky solenoid valve

Float valve set too high

Replace compressor motor

wiring

Repair at motor vendor service

station^ repair or replace motor. Max air temp lOOF.

Max water temp 90F.

Turn unit on and off several times to try to seat valve. Check wiring for possible grounded coil.

Replace if necessary.

Water level should be 3/8 from the top of the siphon standpipe on

the 26H3 and 1/2" from the top

of the siphon standpipe on the

26H5

20 &

Installation

13 27

Installation

Service 11

26H-57PD

Page 56

26H

SERVICE

Carrier

OBSERVATION

8. Long Freezing Cycle (30 - 40 min. normal)

9. Long Defrost Cycle (Normal 5 to 8 Minutes)

POSSIBLE CAUSE

Siphon standpipe is poorly seated, allowing cold water to escape

Float valve leaking making siphon during freezing period.

Main control set incorrectly

("cut-in"temperature too high)

Low-refrigerant charge

Low head pressure during

the freezing cycle Bulged freezing columns Replace evaporator,' check main

Solenoid valve stuck shut or only partly open (listen for hissing)

Leaky water regulating valve

REMEDY AND REFERENCE SECTIONS

Check water pan standpipe for proper seating

Check water pressure. If over 60 psig use a pressure reducing

valve and replace if necessary

Lower "cut-in"setting

Check charge and correct if necessary

Should be 125 psi. Adjust water regulating valve

control Check solenoid and wiring 32

Check and replace i f necessary 13

Installation

12 & 16

5 & 13

10. During harvest cycle unit switches back to freezing

then again to defrost

11. Continuous running - no ice formed.

Water condenser scaled up Clean condenser with inhibited

acid

Defective interlock in main control

Cut-in Bulb loose on suet, line

No make up water reaching water pan

Loss of refrigerant

Moisture in system Change dryer Solenoid valve stuck open

Float setting too high causing standpipe to siphon

Replace

Tighten clamps

Check for stuck float valve or plugged nozzle

Check refrigerant charge; elim inate any leaks, add refrigerant

Check for grounded solenoid. Replace if necessary

Reset float valve. Seat water pan standpipe

Installation

Service 11

26H-57PD

Page 57

Carrier

SERVICE

26H

OBSERVATION POSSIBLE CAUSE

12. Continuous running and freezing

13. Unit fails to return to freeze cycle

14. Unit continues to run Bin control contacts fused

with full bunker.

Faulty main control, or well capillary scaled

Overflow water not reach- Scale and foreign particles may plug

ing overflow well and main control bulb

Main control "cut-in " bulb

has lost its charge Low ambient temperature

Cutout setting too low

REMEDY AND REFERENCE

Replace if necessary 28

Check main control capillary position in well

Replace if ice does not actuate control from freezing cycle to defrost cycle when held against main control capillary (cut-out)

side

overflow trough tube. Check position of control bulb. Also check leveling of machine

Replace main control 28

Unit will not operate at ambient temperatures below 50° 2

Replace control

Adjust and check 30

SECTIONS

15 & 28

Installation

Ice not reaching bin

control bulb

15. Water overflowing from machine section

16. Thin wall cubes "shells ".

Loose electrical connections

Main control, safety overflow

switch or bin control failed to

stop freezing cycle

Leak in water pump circuit Check water hoses and header

UNSATISFACTORY CUBES

Manually shutting unit off Normal as a result of such a during a freezing cycle

Short defrost cycle (cubes remaining in freezing columns)

Check wiring and possibility of 28-29 & 30 faulty controls

shut-down. Instruct owner to

wait until end of defrost cycle

before shutting off unit Check main control setting; may

require raising cut in point

Check refrigerant charge

Check safety switch

11 & 12

26H-57PD

Page 58

26H

SERVICE

Carrier

OBSERVATION

POSSIBLE CAUSE REMEDY AND REFERENCE SECTIONS

Plugged capillary, either due to moisture, dirt or crimped capillary

Cubes "hanging-up" on ice deflector screen

Bln thermostat "cut

out " setting may be too high

Poor water distribution due to scale on spreader plates and/or clogged screen on water pump

Low refrigerant charge

Purge charge; install new strainerdrier. If capillary is damaged, re place accumulator assembly

(includes capillaries )

Reposition deflector screen Installation

Examine evaporator for warped or bulged freezing columns

Adjust and check

Recenter spreader plates and water header nozzles

Clean water circuit, including water pan and water pump screen

Check charge and time of freezing cycle

3, 7 & 8

17 10

Installation

10, 12 & 15

17. Irregular shaped cubes, or mixture of good and shell cubes.

Evaporator tubing pulled loose from freezing columns

Cubes restricting one or

more columns

Float valve set too high. Standpipe not seated

Bin thermostat pre maturely cuts off unit

Temporary power failure during "freezing cycle"

Cubes hanging up in

columns due to bulged

tubes

Replace evaporator

Examine deflector screen and ice columns, remove obstructions

Raise main control "cut-in"set ting slightly (this will increase defrost time)

Reset float valve; check for leaky fl(5at valve. Seat standpipe pro perly.

Check for a faulty bin therm ostat; check settings

Turn unit "off "permit ice to melt out of columns; start unit when power is restored

Check freezing columns. Replace evaporator if columns are bulged

Installation

15 28

Installation

26H-57PD

Page 59

SERVICE

26H

OBSERVATION

17. Irregular shaped cubes, or mixture of good and snell cubes.

"Sticks" of ice

18. Cloudy cubes

19. Unit does not freeze enough ice per day.

POSSIBLE CAUSE REMEDY AND REFERENCE

Improper Feed Through Poor water distribution

Safety overflow switch/ failed to cutout machine

Poor water distribution

Dirty water supply

A cloudy surface is normal while cubes are in storage bln

Freezing cycle too long due to high head pressure

Freezing cycle too long due to water siphoning out of water pan

Check refrigerant charge Check spreader plates. Descale if necessary Adjust or replace

Check spreader plates, water header nozzles and pump circuit for obstruc tions and scale. Clean system with

solvent

Check water piping; clean unit periodically; clean water strainer;

install water filter Cloudy surface will clear when

cubes are placed in liquid

Adjust water regulating valve to give 125 psig on 26H5 or 130 psig on 26H3

Adjust float valve

SECTIONS

Fig. 17

12 & 15

5 & 13

"Freezing cycle" too long due,to excessive splatter of circulating water into bin

"Defrost cycle" too long due

to low head pressure

"Defrost cycle "too long

due to high cut-in setting of main control

Check for torn plastic curtain or cubes holding plastic curtain out of position

Adjust water reg. valve; check refrigerant charge

Lower "cut-in" setting main control

Caution: All cubes should drop

out before freezing begins. One to one and one half minutes

recommended between the dropping of the last cube and the beginning of the freezing cycle.

Installation

Fig. 14

4, 5, 13

& 14

26H-57PD

Page 60

Page 61

Carrier

Supply Water

Temp. °F.

SERVICE

26H3 WATER CONSUMPTION USING A SIPHON HEAT INTERCHANGER

Gallons Per Hour ***

50° Air

60° Air

70° Air 80° Air

90° Air

26H

100° Air

50 60 15 15 15 15 70 19.2 19.2 80 27.5 27.5 27.5 90

NOTE: 1. Figures are based on a head pressure of 125 to 130 lbs. per sq. in. gauge with 70° water and

2. Power consumption, halfway through the freezing cycle, varies from 890 watts with 50° water

(•

12 12

42 42 42

*** Includes water for condensing, siphoning and ice-making.

70° air, halfway through the freezing cycle.

and 50° air to 980 watts with 90° water and 100° air for 26H5. Power consumption for the 26H3 under the same conditions varies from 565 to 580 watts.

19.2 19.2

27.5 27,5 42

12 15 15

19.2 19.2

42 42

27.5

26H-57PD

Page 62

Carrier

Page 63

Carrier

NAME

Mounting Spring

For Overloads and 26H3 Relay and Capacitor See

"Motor-Compressor Group"

115V Starting Relay HN61HZ-028 115V Starting Capacitor HC97CZ-256 23OV Starting Relay HN61HZ-036 1 230V Starting Capacitor

Bunker Thermostat

Includes Power Elements;

High Pressure Cut-Out Temp. Control

SERVICE PARTS

COMPRESSOR MOUNTING GROUP

RELAY & CAPACITOR GROUP

CONTROL GROUP

(1) HK09RA-026 (1) HK09RA-030

CAT. NO.

51H2-1791

HC97CZ-050

HK08RA-030

26H

USED ON

26H3

26H5

1 1

Safety Thermostat (Ranco)

Ending Serial No. 510093 Starting Serial No. 510094

Main Control Thermostat (Ranco)

Rotary Switch

Solenoid Coil 115V

Solenoid Coil 230V

Solenoid Valve Body

MOTOR COMPRESSOR GROUP

Motor-Compressor Assembly

1/2 HP-115V-lPH-60Cy. Includes:

Overload

Capacitor Relay

HN68GC-026

(1)

HC97CM-159

(1)

HN61GC-026

(1)

HH22UK-226 26H5-1851

HH22UK-526

HR56AW-003

EF19SF-215

EF19SF-210

EF19SF-211

EF19SF-023

EF19SF-021

26H3-1009

26H-57PD

Page 64

26H

Motor-Compressor Assembly

SERVICE PARTS

NAME

MOTOR COMPRESSOR GROUP (Cont'd.)

3/4HP-115V-lPH-60Cy. 26C5-389

CAT. NO,

Carrier

USED ON

26H3

26H5

3/4HP-230V-lPH-60Cy.

Includes :

Valve Plate & Gasket (1) 51H2-KF-061

Includes :

Suet. Valve Reed

Disch. Valve Reed Gasket Set Overload 115V

Overload 230V (1) HN68GB-027

INTERNAL GROUP

Water Pump 115V

230V

Strainer & Drier

Float Valve Assembly

Water Reg, Valve

Shut-Off Valve Gasket

CRUSHER GROUP

51H2-KJ-056

(2)

51H2-KJ-072

(2)

(1) 51H2-KJ-069 Ù) HN68GB-025

26C5-399

26H5-183 26H5-193

KH41EZ-030

EC12LA-026 1 1

EB31XF-026 1 1

DK29GA-051 3

1 1

Safety Switch

Ice Crusher

Motor 1/6 HP-115/230V, lPH-60Cy.

*Toggle Switch Ending Serial No.

26H3-321207, 26H5-320640

*Micro Switch Starting Serial No.

26H3-321208, 26H5-320641

Relay 115V

Relay 230V

*NOTE: Not interchangeable

26H-57PD 64

HR64TA-026 1

26C5-1079 1 1

HC37AZ-401 1

HR59BC-002

HR64TB-026 1

HR61LB-021

HR61LB-022 1

1 1

Carrier 26H User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

INSTALLATION

SERVICE

INFORMATION

Carrier

CONTENTS

An automatic, low-cost ICE PLANT .

right in your PLACE of BUSINESS!

26H3

SPECIFICATIONS

Carrier

An automatic, low-cost ICE PLANT . . . right in your PLACE of BUSINESS!

26H5

SPECIFICATIONS

Carrier

1. CHECK SHIPMENT

2. SELECT PROPER LOCATION

STORAGE BIN CRATE

HEAT INTERCHANGER PACKAGE

STORAGE BIN PARTITION

3. MOVE UNIT TO LOCATION

26H INSTALLATION

Carrier

4. UNCRATE THE BIN

5. INSTALL LEVELING SCREWS

7. MOVE THE BIN TO APPROXIMATE LOCATION

8. UNCRATE THE MACHINE SECTION

9. REMOVE THE FRONT TOP, AND SIDE PANELS

10. PLACE MACHINE SECTION ON TOP OF BIN AND BOLT IN POSITION

n. BOLT TIE BAR AT REAR OF UNIT

12. INSTALL WATER SUPPLY AND DRAINS

13. MAKE ELECTRICAL CONNECTIONS

-INPUT-

FIG. n - "BUCK AMD BOOST" TRANSFORMER WIRING

-OUTPUT-

26H INSTALLATION

14. INSTALL BIN THERMOSTAT BULB

Carrier

15. INSTALL CRUSHER GUARD

16. INSTALL SIPHON STANDPIPE AND ADJUST FLOAT

FLOAT ASSEMBLY

17. REPLACE THE ICE DEFLECTOR

18. LOOSEN COMPRESSOR HOLD-DOWN BOLTS

19. START THE UNIT

20. CHECK OPERATION

21. FINAL CHECK LIST

FREEZING CYCLE (SEE FIG. 1)

DEFROST CYCLE (SEE FIG. 2)

FIG. 1 - SCHEMATIC FREEZING CYCLE

CRUSHER OPERATION

2. REFRIGERANT CIRCUIT

L SHUTOFF VALVES

2. INSTALLING GAUGES

3. PUMP DOWN OF COMPRESSOR

4. CHARGING WITH REFRIGERANT

5. OPERATING PRESSURES

6. COMPRESSOR

9. CONDENSER CLEANING AND REPLACEMENT

8. DRYER REPLACEMENT

FIG. 15 - REQUIRED FOR CONDENSER CLEANING

10. EVAPORATOR REPLACEMENT

n. FLOAT VALVE

3. FREEZING WATER CIRCUIT

12. WATER DISTRIBUTOR

13. WATER REGULATING VALVE ADJUSTMENT

15. WATER SYSTEM CLEANING

14. WATER TREATMENT

17. TESTING AND REPLACING THE WATER PUMP

16. WATER PUMP LUBRICATION

18. VARIATION OF CUBES

19. CRUSHER

fig. 22 - CRUSHER GUARD ASSEMBLY

4. ELECTRICAL CIRCUIT

20. CHECKING VOLTAGE

21. LOOSE TERMINALS

22. SELECTOR SWITCH

23. CONTROL BOX