OM 135
PFS 155C - 315C
29
Menu 4, Water Temps/Flow
Press the "NEXT MENU" key and Menu 4 will be displayed. This menu has two screens.
Screen 1, line 1, field 1 indicates the entering evaporator water temperature and line 1, field 2 indicates entering
condenser water temperature. Line 2, field 1 indicates the leaving evaporator water temperature and line 2, field 2
indicates the leaving condenser water temperature. Line 3, field 1 indicates the evaporator delta temperature. This is the
difference between the entering and leaving water temperature and indicates the 'load' on the chiller and the performance
of the chiller. Line 3, field 2 indicates the condenser delta temperature.
Press the "NEXT ITEM" key and screen 2 will display additional information. Line 1, field 1 will indicate the entering
heat recovery temperature. (This is an optional operating parameter and it will display a value only if the optional heat
recovery sensors are installed.) Line 1, field 2 will indicate the flow rate through the evaporator in gallons per minute
(gpm). (This is an option and the optional flow meter must be installed in the piping system.) Line 2, field 1 indicates the
leaving heat recovery water temperature (optional). Line 2, field 2 indicates the condenser water flow in gallons per
minute (optional). Line 3, filed 1 indicates the delta temperature of the heat recovery system (optional). The delta
temperature of the heat recovery system multiplied by the water flow rate and a special factor would provide the amount
of heat recovered in Btu's.
Item
Screen
Line
Display
Field
Range
1
1
Ent Evap=xx.x
o
F
1
Ent Cond=xx.x
o
F
2
2
Lvg Evap=xx.x
o
F
1
Lvg Cond=xx.x
o
F
2
3
Delta T=xx.x
o
F
1
Delta T=xx.x
o
F
2
2 (*)
1
Evap Flow=xxxxgpm
1
1
Cond Flow=xxxxgpm
2
2
Evap Pumps
1
2
Cond Pumps
2
* Requires optional flow transducers field installed in piping by others.
Menu 5, Refrig Temps/Press
Press the "NEXT MENU" key and Menu 5 will be displayed.
Screen 1, line 1, field 1 indicates the saturated evaporator refrigerant pressure and temperature. The evaporator pressure
is measured using a pressure transducer and the associated temperature is calculated using refrigerant tables stored in
the computer memory. Line 2, field 1 indicates the saturated condenser refrigerant pressure and temperature. The
condenser pressure is measured using a pressure transducer and the associated temperature is calculated. Line 3, field 1
indicates the suction line temperature. This is measured with a thermister in the inlet suction pipe before the inlet guide
vanes at the compressor. Line 3, field 2 indicates the liquid line temperature and is measured with a thermister in the
liquid line leaving the condenser.
Item
Screen
Line
Display
Field
Range
1
Saturated Evap= x psi / x °F
1
2
Saturated Cond= x psi / x °F
1
1
3
CondSubCool = x °
1
LiquidLine = °F
2
1
Saturated Cond= x psi
1
2
Liquid Line = x psi
1
2
3
Filter DP= x psi
1
LiqSubCool = x °F
2
1
Cond Apprch = x°F
1
WaterPresRatio=
2
3
2
Evap apprch = x°F
1
RefrgPresRatio=
2
3
Lift Press = x psi
1
Table continued on next page
