York YK-EP, Operation And Maintenance Manual

Page: 93 / 268

Condenser refrigerant level control screen
Figure 32: Condenser refrigerant level control screen
This screen shows the data and settings related to the Condenser Refrigerant Level Control.
Table 84: Display only
Field/LED
name
Access level Description
Subcooler
Effectiveness
–
The Subcooler Effectiveness is evaluated with the following
calculation and compared to a high and low limit. (Cond Sat Temp-
Drop Leg Ref Temp)/(Cond Sat Temp-Entering Cond Liq Temp). This
value is typically around 0.8 at design conditions.
Condenser
Refrigerant
Level
–
Displays the present position of the liquid level. The refrigerant level
is animated in the cutaway view of the condenser. The actual level of
the refrigerant in the tank does not match the percentage displayed
in the Level Control Valve Command box. The actual levels versus
the displayed percentages are listed in Table 85.
Active Level
Setpoint
Service
Displays the setpoint to which the refrigerant level is being
controlled. (Adjustable 20 to 80%; default 50%).
Level Control
State
–
Indicates one of the following states the level control routine is in:
Manual, Inactive, Startup Hold, Setpoint Ramp, PID Control or Hold.
Level Control
Valve
Command
– Indicates the valve command as a percentage of full open.
93 YK-EP Style B Centrifugal Chiller