Victory Reach-In Wartungshandbuch PDF herunterladen (Seite 53)

Section 6 Refrigeration System

6-11

Freezers- FS1, FS2, FS3

(with Copeland compressors)

Converting R-502 to R-402B

CAUTION

Use only R-402B (HP 81) as a retrofit

refrigerant. Other replacement refrigerants

may cause poor performance and/or

component failure.

Equipment Modification Requirements

Component Change Required

Compressor None - No oil

change Required

Expansion Valve-TXV None

High Pressure Cutout None

Fan Cycling Control

(air-cooled)

None

All Solenoid Valves None

Heat Exchanger Refer to FS1, FS2

special instructions

Electrical Wiring None

Branch Circuit Fuse

Size

None

Air-Cooled

Condenser

None

Evaporator None

Refrigerant Charge Same amount as old

R-502 charge

PERFORMANCE AFTER CONVERSION

• Operating discharge (high side) pressure -

Air-cooled models will run 10-30 psig

higher than with R-502

• Operating suction (low side) pressure -

Will run 1-3 psig higher than with R-502

• Interior cabinet temperature - remains the

same as with R-502

Refer to R-402B (HP 81) specification chart

on page 6-5.

PROCEDURE

1. Recover R-502 refrigerant from the

Reach-In in accordance with local and

national governing laws.

2. Refer to the “Equipment Modification

Requirements” chart on this page. On FS1

and FS2 models, remove the heat

exchanger prior to recharging. See next

page.

3. Remove and replace the liquid line filter

drier. Use only a Manitowoc-approved

OEM filter drier.

NOTE: The compressor oil does not require

changing.

4. Evacuate the Reach-In. (For procedure,

refer to page 6-13.)

5. Charge the Reach-In with DuPont

SUVA

â

HP81 refrigerant. The system

charge is identical to the R-502 charge

listed on the model/serial number tag.

NOTE: Charge with liquid only into the high

side of the Reach-In. Use the weighing in

method or “Dial-a-Charge.” Refer to page

6-14.

6. Remove the R-502 labels from the

compressor and near the front of the

control box. Do not remove the

model/serial number tags.

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