✐NOTE: For chiller operation below 45°F {7.2°C}, the

chiller’s control must be configured properly. Contact Conair Service.

IMPORTANT: A correct mixture of glycol and water must be used as process coolant for operation below 45°F {7.2°C}. See Installation section entitled, Filling the Chiller.

CAUTION: At any setpoint, the possibility of freezing exists and it is the operator’s responsibility to take necessary action to prevent freezing at all times.

✐NOTE: The high and low pres- sure switches are enclosed

inside the same module.

S a f e t y A d j u s t m e n t s

To ensure safe and efficient operation at lower setpoints, adjustments of the low pressure switch from factory settings is required. The table below lists the appropriate settings.

Operating

Low

Low

Temperature

Cut In

Cut Out

 

 

 

45°F

35#

25#

40°F

30#

20#

35°F

25#

16#

30°F

20#

12#

The low pressure switch serves as the mainline defense against freezing. It shuts down the chiller if the coolant temperature ever decreases to its setting.

To adjust a mechanical low pressure switch:

1Disconnect and lockout the main power supply.

2Remove the chiller’s right-side panel, as viewed from the control.

3Locate the low pressure switch within the top portion of the chiller’s cabinet.

4Turn the low pressure cut-in and cut-out adjustment screws found on the top of the low pressure switch, according the operating temperature located on the chart above.

Cut-out adjustment

Cut-in adjustment

5Replace the chiller’s right-side panel and reapply main power.

B - 1 l A p p e n d i x