Flowserve MEN - Manual (Page 20)

MEN USER INSTRUCTIONS ENGLISH 71576288 – 11-09
Page 20 of 36
®
If one of these faults occurs, the alarm is triggered
and signaled by:
- activation of the siren;
- illumination of the corresponding indicator;
- repeated signal on the terminal for transmission.
However, a fault does not stop the plant.
Immediate intervention is required to remedy the
fault.
- The siren may be switched off by pressing the
push-button "STOP SIREN". This operation does not
cancel the siren if the fault signal is present at the
alarm terminal.
- Turning the rotary key switch "CANCEL FAULT"
remains ineffective as long as the fault persists and
resets the audible alarm signal.
→
Simulation of faults:
The safety devices may be checked by simulating
faults:
a) Excess water temperature fault simulation by
circuit opening between 55 wires and grounds.
b) Oil pressure low by circuit opening between 35
and 56 wires. [No oil pressure by circuit opening
between wires 035 and 56] if the engine is at
standstill and by circuit closing (035 and 56) when
the engine is running.
Water temperature fault function is activated only
after an initial time period of approximately 10
seconds.
Oil pressure fault function is efficient only after an
initial time period of approximately 1 minute.
→
Check room ventilation:
Ensure that room ventilation is correct by
incorporating top and bottom air vents as standard
practice. These vents must each have a minimum
size of 0.5 m².
Engine overheating is generally due to:
- defective engine and/or room cooling,
- an exhaust pipe of insufficient diameter,
- non-standard utilization of the plant, in excess of its
design characteristics.
- insufficient room ventilation
The temperature read on the thermometer located
on the front panel of the switching enclosure must
be stable between 70 and 90 °C when the plant is
on-load and conform to nominal characteristics
indicated in the specifications.
If the cooling water temperature rises above this
threshold value, an audible alarm is triggered and a
light indicator switches on.
Do not run the pump at zero flow-rate for more
than 10 minutes as this will heat up the cooling
water intended to cool the engine.
After approximately one hour of operation, the plant
may be switched off by pressing the control button
marked STOP.
ACTION MAINTAINED UNTIL TOTAL
STANDSTILL OF THE ENGINE.
→
Automatic start-up pressure switch n °1 :
With the selector pressure switch n° 1 in the "AUTO"
position and selector pressure switch n° 2 on stop,
the contact given by one of the control pressure
switches provokes immediate start-up of the plant at
the set nominal speed.
* Supervision of start-up sequence
The engine should normally start up first time.
However, to overcome an anomaly such as:
- Low batteries, pump packing gland too tight
- No fuel
- Slight presence of air in the fuel circuit
- Engine and room insufficiently heated during cold
weather
The automatic system is designed to energize the
starter motor with 8-second impulses from each set
of batteries alternatively.
The standard setting is 4 impulses of 8 seconds with
a rest period of 3 seconds between each impulse.
At the end of a complete cycle, if the engine has not
started, the alarm "FAIL START" is triggered,
followed by:
- Activation of the siren
- Illumination of the "Fail start" indicator
- Repeated signal at the terminals for transmission.
The operator informed may attempt a manual start
by pressing the "EMERGENCY START" push-
button.
→
Automatic start-up pressure switch n °2:
Same automatic start-up procedure with pressure
switch n °1 but in the reversed order.
* Simulation of a start-up sequence
It can be done by any of both selector pressure
switch n °1 and n° 2.
The first pressure switch contact to be opened will
initiate its start-up sequence.
To check the start-up sequence, a simulation may
be carried out in which the injection is blocked by
pressing and holding the stop control while the plant
is in "AUTO" mode and the contact of a pressure
switch is closed (pressure drop in the network).