Milnor 5050, Руководство по обслуживанию

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Pellerin Milnor Corporation
Fire Safety System Operation and Maintenance
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NOTICE:
If the fire safety system is in operation (if there is a flow of water from the
rear of the dryer)—go to Section 5 : If Water Flow Occurs, page 5 .
fire safety system the water nozzles and related equipment that put water in the dryer to stop a
fire in the basket.
Water flow will start automatically if the temperature becomes too high, as told in Section 1 : Fire
Safety Functions and Components, page 1 . You can also start it manually. Pull the operation han-
dle or use the control panel as told in Section 4 : How to Do a Test of the Fire Safety System,
page 4 . The system will start a flow of water. The water will go into the basket through the perfo-
rations. Do a test of this system at the intervals given in the routine maintenance schedule.
1. Fire Safety Functions and Components
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This section gives the fire safety functions and components for 6464_ and 7272_ models. Compo-
nents and their locations can be different on other dryer models but the functions are the same.
Table 1. Fire Safety Functions for 6464_ and 7272_ Dryer Models
Sensor type Temperature switch (closes at specified
temperature)
Thermocouple (gives continuous temperature da-
ta to the controller)
Sensor name ST225-1 & 2 ST550A & B STBB T3
Location Basket/outlet
duct (
Figure
1, page 2 ,
Figure 3,
page 2
, Fig-
ure 4, page 2 )
Inlet duct Fig-
ure 1, page 2 ,
Figure 2, page
2
At burner
(
Figure 1,
page 2 , Fig-
ure 5, page
2
)
Outlet duct ( Figure 3, page 2 )
Safety limit (the
temperature or
condition that
causes the given
result)
225° F (107°
C) 550° F (288°
C) 175° F (79°
C) –Three safety limits in software–
5° F increase for
15 seconds or
15° F increase
for 5 seconds
during min fire* Higher than
220° F (104° C)
for 5 seconds** 240°F (116°C)
Occurs when
temperature is
too high
Water flows
and all dryer
actions stop. Flame goes off. If the flame
will not come on, see the line
below this one. Each step before the cooldown is
subsequently cancelled while the
condition continues. Water flows and
all dryer func-
tions stop.
Display when
temperature is
too high
THREE
WIRE DIS-
ABLED error
and operator
alarm. Initially none. If the flame
will not come on, the
CHECK ERROR LIGHTS
error and operator alarm
occur. The controller
shows “MINF”
and puts data in
the record of dry
cycle details. The controller
shows “>220”
and puts data in
the record of dry
cycle details. OUTLET
TEMP EX-
CEEDED 240
Df - POWER
DOWN error
and operator
alarm.
Necessary
procedure
See Section 5
: If Water
Flow Occurs,
page 5
If the error given in the line
above this one occurs, see
“Error Messages” in the op-
erator guide. See Section 2 : About the Min
Fire and Outlet Temperature Ex-
ceeded 220°
Faults, page 3
See Section 5 :
If Water Flow
Occurs, page 5
* This does not apply to steam dryers.
** This does not apply to steam dryers if they do not use modulation.
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