Cornelius CH 551 Manual do Operador descarregar pdf (Página 6)

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2. CONTROL POWER SWITCH/LIGHT (see Figure 3)

A lighted ON/OFF push button switch is used to switch power to the 24 VAC control circuit. The switch

lights up to indicate that the Chiller power is present.

3. BYPASS LIGHT (BLUE)

(see Figure 3)

A blue light is used to indicate when the system is operating at a reduced capacity. The light will cycle on

and off in response to the Temperature Controller when the system temporarily requires less cooling.

4. SAFETY LIGHT (RED

) (see Figure 3)

A red light is used to indicate that a fault has occurred in the Chiller operation. The following conditions will

illuminate the safety light.

A. High refrigerant pressure.

B. Low process water temperature.

C. Low process water flow (optional, see OPTIONAL EQUIPMENT section).

5. HIGH–PRESSURE SAFETY

(see Figure 3)

The high-pressure safety will shut down the compressor and pump when the refrigerant head pressure

reaches 240-PSIG for R–134A refrigerant units and 350–PSIG for R–22 refrigerant units. The high pres-

sure switch must be reset manually. The switch is located in the electrical box which must be accessed by

removing the Chiller lid. The high-pressure switch can be re-set by depressing the reset button through the

opening in the electrical box cover. If the control opens again, check the setting with a set of refrigeration

gauges. If the setting is correct, contact the Remcor Technical Service Department.

LOW–TEMPERATURE SAFETY

The low–temperature safety will shut down the compressor and the pump when the process water temper-

ature drops below 35_ F (1.7_ C). The switch will automatically reset when the water temperature is re-

stored to 38_ F (3.3_ C). The low temperature control is located in the electrical box.

START UP

WARNING: Never operate the Chiller with it’s panels removed.

Always use the power switch to turn off the Chiller when it is not being used (see Fluid

Recommendations page).

Always ensure that all air inlets and outlets are free from obstruction.

Be sure that the reservoir is filled with fluid prior to powering up the unit.

Process Water Flow, Units with Pump and Tank (Standard)

Follow standard plumbing practices and local codes in making water connections. The Chiller inlet and outlet

connections are 3/4”. Flexible hose and fittings are recommended for plumbing the system. A No. 20 mesh

strainer should be installed on the Chiller inlet to prevent foreign particles from entering the system and should

be cleaned monthly. Lines should be routed with as few bends as possible. Prevent lines from running near

radiators, hot water pipes, etc. Any lengths of tubing that are exposed to high ambient temperatures should be

insulated to prevent condensation and/or significant liquid heat loss.

After ensuring that the system is free from the obstruction, that all valves are open, and the reservoir when avail-

able is full, push the CONTROL POWER switch to the “ON” position. The pump should now be operating.

On three–phase units such as the CH1502–A and the CH1503–A, it is important to check the pump rotation.

Remove the left–side panel. Momentarily push the POWER button in and observe the motor shaft. Make sure

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