Refrigeration System; Refrigeration System Adjustments; Expansion Valve; Adjustment And Troubleshooting - Cornelius 1000 - Series Service Manual

500, 700, 1000, 2000 - series continuous flow icemaker

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Service manual (28 pages)

Installation and service manual (48 pages)

Installation manual (28 pages)

Table Of Contents

Table of Contents

Continuous Flow Icemaker Service Manual

WCC 500

40°

50°

162

60°

188

70°

214

80°

245

90°

275

100°

309

EFRIGERATION

A complete understanding of the icemaker and hermetic refrigeration system is necessary before any

adjustments are made. The refrigeration technician must use high and low side pressure readings, water

and air temperatures, plus general conditions of cleanliness to assess the refrigeration system status

when making any adjustments.

All icemaker products are tested and adjusted at the factory prior to shipment where the ambient

temperature ranges from 65° to 90°F, depending on the season of the year.

Whenever a new icemaker product is initially installed and started–up, it is imperative that the start–up

operation make the following checks and/or readjustments for local conditions.

XPANSION

ALVE

You will find a thermostatic expansion valve on icemakers, which is used to control the amount of

refrigerant flowing through the evaporator. Improperly installed or defective expansion valves may cause

low production, soft ice, squeaking from evaporator and excessive load inside evaporator.

By using general refrigeration system troubleshooting along with the pressure charts you can easily

determine whether or not the expansion valve is working properly.

DJUSTMENT AND

When troubleshooting the expansion valve you must first be sure you have adequate water flowing into

evaporator, a clean condenser, unit is properly ventilated, and system is properly charged and free from

any restrictions. Also be sure compressor is operating properly.

Second, take reservoir water temperature and air temperature from condenser inlet and determine at

what pressure unit should be running. Machines are equipped with thermostatic valves, there is NO

adjustment. If correct pressure cannot be obtained, first be sure system has time to stabilize 10–15

minutes. Second, be sure sensing bulb is located at 12:00 position on outlet side of evaporator about 3–4

inches away from evaporator and be sure to insulate well and clamp tightly to tubing. If system pressures

are still not adequate, take a second water and air temperature reading and go over other parts of system

for possible problems. If proper charge is questionable evacuate and recharge to nameplate and leak

check. If valve still malfunctions replace valve.

When replacing valve be sure to bleed refrigerant gas from low side port so as not to lose refrigerant oil.

Use general refrigerant system practices when replacing and recharging unit. After new valve is in place,

go through previous monitored adjustments and troubleshooting to be sure valve is functioning properly.

NOTE: Units with thermostatic expansion valve—valve is located on bottom refrigerant line.

Sensing bulb is located on top refrigerant line. On water cooled units adjust condenser

modulating valve before troubleshooting expansion valve.

CAUTION: Very High discharge pressure is present in system. Quick disconnects on you gauges

will minimize danger and loss of refrigerant. Comply with federal regulations for reclaiming

refrigerant.

Publication Number: 630460174SER