Cornelius CH751, CH951, CH750 User Manual

IMI CORNELIUS REMCOR INC  500 REGENCY DRIVE  GLENDALE HEIGHTS, IL 60139–2268

Telephone [phone] Facsimile (800) 519–4423

Operator’s Manual
CHILLER (“CH” SERIES)
Models: CH750, CH751, and CH951

Part No. 91256
Revision Date: August 9, 2002
Revision: C

THIS DOCUMENT CONTAINS IMPORTANT INFORMATION
This Manual must be read and understood before installing or operating this equipment

IMI CORNELIUS INC; 2002

PRINTED IN U.S.A

TABLE OF CONTENTS

INSTALLATION INSTRUCTIONS 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Location 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Plumbing 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

START–UP/OPERATION 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MAINTENANCE 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SERVICE 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing Wrapper 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing Switch 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing Standard Thermostat 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing Electronic Differential Thermostat 4. . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing Fan Blade and/or Motor 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing Pump 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FLUID RECOMMENDATION 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING GUIDE 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chiller Does Not Operate 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

No Circulation of Chilled Water 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inadequate Cooling 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PARTS LIST 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

WARRANTY 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LIST OF FIGURES

FIGURE 1. CH750, CH751 AND CH951 EXPLODED VIEW 7. . . . .

INTRODUCTION

The REMCOR “CH” Series Water Chillers (Models CH750–A, CH751–A, and CH951–A) are specifically de-
signed to cool clean liquid before it is circulated to the cooling application. The Unit includes a complete refrig­eration system and associated controls housed in a sturdy sheet metal enclosure with perforated panels for air
circulation. Options include a reservoir and a choice of pumps and temperature controls to provide a self–con-
tained liquid cooling/circulation system tailored to a particular closed loop or tank cooling application.

On closed loop systems, the Unit is provided with a pump and reservoir for recirculation of water from the chiller
to the process. On tank cooling systems, the Unit is provided without the reservoir and the pump is optional for
recirculation of water from the chiller to the tank. Control temperature is sensed on the outlet of the chiller for
closed loop systems and it is sensed on the inlet of the chiller for tank cooling systems.

The temperature control options consist of a general purpose digital thermostat and an electronic differential
thermostat to satisfy the temperature control requirements. Both options include a digital thermometer for moni­toring system temperature.

The pump options consist of a small magnetic drive pump as standard with a variety of magnetic drive and posi­tive displacement pumps available for particular flow and pressure requirements. An optional bypass valve is
available for the pump circulation system. (This valve is standard on Units utilizing the positive displacement
pumps). This can be used to adjust pump flow and pressure to match process requirements. This valve also
allows internal recirculation within the chiller in the event the chiller outlet is obstructed.

SPECIFICATIONS

CH750–A CH751–A CH951–A

Condensing Unit Horse Power 3/4 3/4 1

Electrical (Volts/Phase/Hz) 115/1/60 230/1/60 230/1/60

F.L.A. (Amps) 17 8.5 10

Reservoir Capacity (Gal) 5 5 5

Refrigerant 134–A Charge (Lbs) 3.5 3.5 4.0

Stainless Steel Connections 3/4–inch FPT 3/4–inch FPT 3/4–inch FPT

Operating Water Temperature
Range

Net Weight (Lbs) 175 175 175

Dimensions Depth (inches)
Width (inches)
Height (inches)

40°F-100°F 40°F-100°F 40°F-100°F

24–1/2
18–1/8
30–1/2

24–1/2
18–1/8
30–1/2

24–1/2
18–1/8
30–1/2

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INSTALLATION INSTRUCTIONS

LOCATION

Locate the chiller indoors in a well ventilated area with ambient temperatures in the range of 65° F to 100° F.
Allow a minimum of six inches of clearance around the chiller for proper air circulation. Avoid hot air discharge
from other equipment or enclosed areas where heat could build up and cause a rise in ambient temperature.

PLUMBING

Follow standard plumbing practices and local codes in making water connections. Piping that is exposed to high
ambient temperatures may need to be insulated to prevent condensation and/or significant liquid heat gain.

ELECTRICAL

All wiring must conform to the National Electric Code and any applicable local codes. The chiller must be:

1) Permanently wired by means of conduit from the junction box on the rear of the chiller cabinet to a properly
fused disconnect of proper amperage or:

2) Wired to a properly rated power cord and plugged into an outlet with appropriate disconnect and amperage
rating.

START–UP/OPERATION

Before the Unit can be operated, it is important that the circulating system be filled with water (See Fluid Rec­ommendations page). On systems with a reservoir, ensure that the drain plug is in place and the plug is secure.
Fill the reservoir through the fill port with clean water. The water level sight glass on the front panel will indicate
“Full” when enough water has been added. Once full, make the final connection to the inlet and outlet of the
chiller. On system without a reservoir, the pump should be primed before operation. Attach a water source to
the inlet of the chiller and fill the Unit with clean water. The system is filled when the water can be seen flowing
at the chiller outlet. Once full, make the final connection to the inlet of the chiller.

Turn the power switch to the “On” position. The switch will light indicating power to the Unit and the pump will
operate, the thermostat can be adjusted to the proper setpoint.

Set the standard digital thermostat to the desired setpoint as follows:

1) Push the “Set” button located to the right of the digital display. The current setpoint will show on the display.

2) While the current setpoint is displayed, push the “Up” or “Down” buttons until the desired setpoint shows on
the display.

3) Release all buttons. The display will show the system water temperature after a few seconds. The setpoint
can be viewed at any time by merely pushing the “Set” button.

If the Unit is provided with the electronic differential thermostat, the air probe will need to be located where am­bient temperature is to be monitored. The setpoint will then be the temperature of the air probe. If this thermo­stat is provided with a digital display, the setpoint can be checked by pushing the “Setpoint” button located on
the display. Releasing this button will display the system water temperature.

When the flow rate to the process is critical, a flow meter and valve should be installed in the line in order to ob­tain the proper flow rate.

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