‘Subject Page PX - Operator Reference 33 of 116 5 List of Activations MMC eng Operation mode | Av320-1 | avaos-1 | avs0s1 | avsoet | avets-1 | AV301- NO=open in rest | NC No NC. Ne No NC. NC = closed in rest Stand still . Start . Stand by “ ” . Water Test : ” ~ . Production ‘ ” ” * . Holding * ~ ” . . CIP Water . ” ” . CIP 2 ” ” . Stop ’ ” “ . www.alfalaval.com‘Subject Page PX - Operator Reference 34 of 116 Operation mode | Ave754 | soec | povazn+ | Feed eats [psoas [avert [Vale Interlock (PXS5 and signal PXS5.EX) NO=openinrest | NC | NC No Ne NC = closed in rest Stand still D (vv) Start + . D w . oe Stand by + vm los w . x Water Test + mo | oe w . oe Production + ml oae 2 w . oo : Holding + ae 2 w . oe - CIP Water + | oae ’ w . oo cP 2 + | oe ’ w . oe Stop + 7 . w : x Equipment activated. Signal “feed pump interlock"deactivated at beginning of mode. Valve can be operated in the Stop sequence by selecting the "Safety water" function on the operator's panel. The valve is opened for T74 seconds when alarm A17: "Emergency Stop” or A03: “Vibration shutdown" is activated 4 Valve is only activated if PO05 is set to 1 # Atdischarge: After delay of 43 (small)/T44(large), valve is activated for T45(small)/T46(large) seconds In between discharges: (during startup only when speed > 95% of nom speed) Pause/pulse: Every 787 seconds, the valve is opened for T88 seconds. Pause/pulse activation disabled at Starting when PO96 = 1 Pause/pulse activation disabled at Starting & Standby when P096 = 2 D Signal “feed pump interlock'deactivated when mode active. Signal “feed pump interlock"deactivated at beginning of liquid seal sequence, which may be initiated by the alarm A31: “LP pressure low’ if P027=1 (the sequence ends up in Standby mode). Valve will be opened according to the liquid seal sequence on alarm A31: "LP pressure low” and parameter P027 = 1. ** Valve activated according to the discharge program. See discharge handling description in this manual, 44Valve activated according to the discharge program, Except if backpressure control is not allowed during discharge. See Discharge handling description in this manual. = Normally activated in the selected modes. When the centrizoom is not activated, itis in its inner position, When activated in Production or Holding, it goes to the production position, which has been set manually on the centrizoom. When the Liquid Seal sequence is active, the centrizoom goes to its inner position. The centrizoom goes as well to its inner position during a certain time wuwalfalaval.com‘Subject Page PX - Operator Reference 35 of 116 period at discharge (T28 DCH1/738 DCH2). After this, it returns to its production position. The positioning of the centrizoom to its inner position during discharge is delayed by a short time Period (727 DCH1/T28 DCH2) '¥¥ Oil lubrication (eDrive). Lubrication pulses are activated when not Stand Still. In Stand Still fast lubrication can manually be activated ‘#4 Oil cooling bypass, top bearing (eDrive). Actiave when bearing temperature TT731 exceeds, P053. Deactivated again when temperature drops below P053-P054. Pe UES Cun CNET} Oil to the bearings of the separator is pulsed into the system by means of a piston pump P421-1 with two pistons, one for the neck bearings and one for the bottom bearing. The flow to the bearings is supervised by two flow switches, FS421a-1 and FS421b-1, and after passing the bearings the oil is retumed to the oil tank. The output from the flow meters is a number of pulses (positive flanks of the signal) per time. Each flow meter has an own pulse counter. There are two lubrication modes, one normal and one fast. Processing in Stand Still: * Fast lubrication enabled at manual command, pulse length 1 s, pulse interval 797. This lubrication function shall be active until oil droplet emerge from the return lines: before first start-up, and before start of the separator if the drive system of the machine has been dismounted Fast lubrication is stopped by manual command. Processing in Starting: * Upon a transition from Standstill to Starting, fast lubrication goes on for 4 min. If the number of pulses from the flow meters is below P102 during any 2 minutes (sliding), an alarm triggered and the system goes to Stop. * When 4 min has elapsed, fast Lubrication is turned off and normal lubrication is turned on with pulse length 3 s, pulse interval T90. If the number of pulses from the flow meters is below P103 during any 4 minutes (sliding), an alarm triggered and the system goes to Stop. Processing in all running modes modes: wow alfalaval.com