Microtek MHP1-HD Installation Manual download pdf (Page 21)

OMRCPMICRO 21

1. "Frz Stat": Set to the saturated refrigerant pressure that corresponds to a temperature equal to 13.5°F

below the ice set point. For example, if the ice set point is 23°F, the "Frz Stat" would be set at 33 psig,

(which is 23°-13.5° = 9.5°F; 33 psig is R-22 saturation pressure at 9.5°F).

2. "Frze H2O": Set at least 4°F below the ice set point, but not lower than the freezing point of the solution.

In this example, the "Frze H2O" would be set at 19°F.

3. "LP CutOut": Set 8 to 10 psi below the "Frz Stat" setting but never below 20 psig.

4. "LP Cutin": Set 15 to 20 psi above "LP CutOut".

5. FreezeTimer ("FreezeTim") and Condenser High Pressure ("Hi Press"): Do not need to be adjusted.

Network

Based on the Maximum Chilled Water Reset Set Point ("MaxChWRst"), the "Network" option allows a signal

to be sent that reflects 0 to 100% reset of the Leaving Chilled Water Set Point ("Lvg Evap") for chillers (except

Ice mode) or Leaving Condenser Water Set Point ("Lvg Cond") for THRs. This option functions similar to the

4-20mA option.

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Microtek MHP1-HD Installation Manual Page 21