DuraChill DCA203C4, Operator'S Manual

110-275 

19 

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Item

Description 

Choices / Ranges

Default Setting

HA 

High Ambient Temperature Limit — 

 Maximum ambient 

temperature limit. Displayed and settable only in ºC. Should 
the ambient temperature rise above the HA value, the audio 
and visual alarms will activate and the compressor, heater, 
fan, and pump will turn off. 

NOTE:

 Chiller’s rated cooling capacity is dependent on an 

ambient temperature of 20°C (68ºF). Performance will 
decrease as the ambient temperature rises. Continuous 
operation at ambient temperatures above 40ºC (104ºF) is not 
recommended. 

+30 to 45ºC 

Note: Always displayed 

and set in °C 

40ºC 

FP 

Maximum Fluid Pressure — 

Maximum allowable fluid 

pressure; settable in either PSI or kPa. Should the fluid 
pressure rise above the maximum fluid pressure value, the 
audio and visual alarms will activate and the compressor, 
heater, fan, and pump will turn off. 

NOTE: 

The Chiller also incorporates a built in pressure 

regulated bypass valve. It will maintain a maximum outlet 
pressure by diverting flow of the process fluid to the reservoir. 
The bypass valve may be adjusted by the customer.  

CAUTION: 

Maximum operating pressure for the Chiller is 100 

PSI / 6.9 bar. Different pumps have different maximum 
operating pressures. 

10 to 100 PSI 

69 to 690 kPa  

(display value x 100) 

80 PSI 

5.5 x 100 = 

550 kPa 

FL 

Minimum Flow Rate

 — Minimum allowable flow rate; 

settable in either GPM or LPM. Should the fluid flow rate drop 
below the minimum value, the audio and visual alarms will 
activate, and the compressor, heater, fan, and pump will turn 
off. 

0 to 2 GPM  

0 to 7.5 LPM 

0.0 GPM 

(0.2 GPM 

optional) 

0.0 LPM 

(0.1 LPM 

optional) 

Fc 

Flow Rate Calibration — 

Allows adjustment of the displayed 

flow rate to match that of a known standard.

0 to 99.9 gain 

Nominal flow 

AF 

Auto-Refrigeration Set Point — 

The upper temperature at 

which the refrigeration system will activate; displayed and 
settable in °C only. There will be no refrigeration or cooling at 
set points above the AF setting. 

No heater option 

20° to 40°C 

With heater option 

20° to 50°C  

No heater option

40°C 

With heater 

option 

50°C  

Cb 

Compressor Band – 

The temperature at which the 

compressor will turn off. This protects the fluid temperature 
from dropping too low during periods of low or no heat load. 
The compressor turns back on when the temperature rises 
above the set point.

-06° to -03°C 

-06°C 

°C 

Calibration Offset 

— Allows adjustment of the displayed 

temperature to match that of an independent traceable 
standard; displayed and settable in °C only.  

±1.9°C 0.0°C 

PC 

Communications Baud Rate

 — Selects the baud rate for 

serial (RS232/RS485) communication.

24 (2400), 48 (4800),  

96 (9600) or 192 (19200) 

96