JOHNSON CONTROLS
48
FORM 160.54-O1
oVerVieW
This screen displays a cutaway view of the Hot gas
Bypass Valve. The setpoints relating to the Hot Gas
Bypass Control are maintained on this screen. Related
Hot Gas control parameters are displayed for reference.
The Hot Gas Valve can be manually controlled from this
screen. Through animation, the relative valve position is
displayed. The parameters displayed on this screen vary
according to the software version and the selection made
for the Motor Communications Protocol Setpoint when
equipped with Variable Speed Drive (VSD) or Medium
Voltage Variable Speed Drive (MV VSD).
Shown above as it appears in software version
C.OPT.01.19.307 and later. Earlier version variations
noted below.
dispLaY oNLY
Valve Position
Displays the present position of the Hot Gas valve as
a value between 0% (closed) to 100% (full open). By
animation, the valve is shown in its relative position. The
valve position is animated. When the actual position is
0% to 19%, the valve is shown fully closed. When actual
position is 20% to 39%, the valve is shown 25% open.
When the actual position is 40% to 59%, the valve is
shown 50% open. when actual is 60% to 79%, the valve
is shown as 75% open. Positions greater than 79% are
shown as full open.
Pre-rotation Vanes Position
Displays the present pre-rotation vanes position as a
value between 0% (closed) and 100% (full open)
Delta P/P
Displays the chiller head pressure calculated as (con-
denser pressure – evaporator pressure/evaporator pres-
sure)
Temperature Differential (LCHLT – Setpoint)
Displays the difference between the leaving chilled
liquid temperature and the leaving chilled liquid tem-
perature setpoint
Surge Avoidance Surge Count
(Displayed as “Total surge Count” in software version
C.OPT.01.15.307 and earlier)
This is the total number of surges accumulated by the
Surge Protection feature. If equipped with a VSD or
MV VSD, it is only the surges detected while the drive
is running at maximum frequency.
Surge Avoidance Surge Detected (LED)
Illuminates momentarily when a surge is detected by the
Surge Protection feature. If equipped with a VSD or MV
VSD these are only the surges detected while the drive
is running at maximum frequency.
fig. 11
hot gas BYpass sCreeN
LD13826
optiView Control Center
Содержание YORK YK MaxE
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