Manitowoc Ice GR-0490N, GR-0400A, GR-0401W User Manual

Size:
22.49 Kb
Download

FOR MODELS

GR-0400AGR-0401WGR-0490NGD-0402AGD-0403WGD-0492NGY-0404AGD-0405WGY-0494N

G-0400REFRIGERANT FIELD CONVERSION PROCEDURE

R-502toR-402B

WARNING!

Use only R-402Bas retrofit refrigerant. Other replacement refrigerants may cause poor performance and/or component failure.

EQUIPMENT MODIFICATION REQUIREMENTS

Component

Change Required

Compressor

None (replacement compressor is precharged with POE oil)

Expansion Valve (TXV)

None

High Pressure Cut-out

None

Low Pressure Cut-out(Remotes)

None

Fan Cycling Control (Air-cooled)

None

All Solenoid Valves

None

Water Regulating Valve (Water-cooled)

None

Heat Exchanger

None

Electrical Wiring

None

Branch Circuit Fuse Size

None

Air-cooledCondenser

None

Water-cooledCondenser

None

Evaporator

None

SYSTEM PERFORMANCE AFTER CONVERSION

Daily Ice Production

Energy Efficiency

G-04008% increase

5% increase

Operating discharge (high) pressure: air-cooledmodels will run20-30psig(138-207kPa gauge) higher thanR-502pressures published in service manuals. Setwater-cooledhead pressure the same asR-502settings.

Operating suction (low) pressure: will run1-3psig(7-21kPa gauge) higher thanR-502pressure published in service manuals.

8010513 Sheet 1 of 2

08/96

Manitowoc Equipment Works

Division of The Manitowoc Company, Inc. • 2110 South 26 Street, P.O. Box 1720, Manitowoc , WI 54221-1720USA Telephone414-682-0161• Fax - Sales:414-683-7589• Service/Parts:414-683-7585• Other:414-683-7879

CONVERSION INSTRUCTIONS

1.Recover R-502refrigerant from the ice machine in accordance with local and national governing laws.

2.Refer to “Equipment Modification Requirements” checklist on previous page.

3.Remove and replace liquid line filter drier. Use only Manitowoc approved OEM filter drier, P/N 8930233. NOTE: compressor oildoes not require changing.

4.Evacuate the ice machine. IMPORTANT: remote models require a4-pointhose hookup to evacuate properly (refer to service manual or service bulletin,SB-18-84,for proper evacuation procedure).

5.Charge ice machine with R-402Brefrigerant. System charge is identical toR-502charge listed on model/serial number tag.NOTE: charge withliquid only into the high side of the ice machine usingweigh-inmethod or“Dial-A-Charge”(refer to service manual or service bulletin,SB-18-84,for proper charging procedure).

6.Remove purple R-502label near service valves.Do not remove model and serial number tags!

7.Attach an R-402Bconversion label, P/N 8134423, to each of the two locations:

A.Next to the serial number plate.

B.Next to the service valves.

IMPORTANT: write service company name and conversion date on each label.

8.Restart ice machine and verify it operates properly (refer to service manual, if necessary). Water-cooledmodels maintain head pressure at the sameR-502setting.

8010513 Sheet 2 of 2 08/96