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Mounting the DMK/6 to a automatic shutoff valve
1. Turn off the gas supply.
2. Refer to the flow direction on the valve housing.
3.
Note:
Aluminum to Aluminum connection:
Coat inner and outer threads with a suitable lubricant
before sealing the inner and outer threads.
4.
DO NOT
use any part of the DMA or the mounting
bracket of the DMK/6 assembly as a lever to tighten!
Use appropriate sized wrench.
5. Tighten connections. Use the chart below for torque
specifications.
6. Perform a complete leak test after installation
Adjusting the DMA
Note:
The red and yellow switches are field set outside of
the 0 to 90˚ operating range before calibration. Do not
change these adjustment dials until calibration is com-
plete.
DO NOT
use these switches in lieu of the potentiom-
eter calibration.
Potentiometer Calabration
To Adjust Minimum Position
1. Apply a 4 mA DC input signal.
2. Turn the
Y min (Zero)
potentiometer (adjusting range
0 to 100 % of stroke) to position the actuator at the
desired minimum position. Turning
Y min (Zero)
CCW
drives the minimum position towards 0˚.
To Adjust Maximum Position
1. Apply 20 mA DC input signal.
2. Turn the
Y max (Span)
potentiometer (adjusting range
25 to 100 % of stroke) to position the actuator at the
desired maximum position. Turning
Y max (Span)
CCW drives the setpoint towards 0˚.
90
70
50
30
10 0
90
70
50
30
10 0
ST-2
MV
ST-1
Setpoint Scale
Mounting the DMA to the DMK/6
1. Remove the clear cover from the DMA
2. Insert the shaft from the DMA into the linkage of the
DMK/6until the motor is flush on the DMK/6 mounting
plate. snug the set screw with a 2.5 mm allen wrench.
Torque to 15 lb-in.
3. Insert the M5 X 55 mounting bolts (supplied) through the
DMA motor mounting holes. Take care not to break the
plastic covers off of the bolt holes. Hand tighten the
8mm hex nuts. (supplied) Torque the bolts to 45 lb-in.
Note: Y min (Zero)
must be no more than 75 % of
Y max
(Span)
(reference: 90˚ = 100%). E.g. if the maximum
position is set at 85˚, the minimum position can be set at
64˚ maximum. (85˚ * 0.75 = 64˚).
Switch Adjustment:
Note:
Use the scale under the Red ST1
switch to
set the switches.
The DMA incorperates two limit switches that limit the
crank shaft from exceeding a set point if the zero or span
potentiometer fails. The DMA also has an SPDT auxilary
switch. All switches can be adjusted anywhere over the 90˚
stroke.
ST1 Limit Switch (Red):
This switch limits the minimum
position at 0˚ or more. Set the switch at approx. 1˚
LESS
than the
Y Min.
setpoint.
ST2 Limit Switch (Yellow):
This switch limits the maximum
position at 90˚ or less. Set the switch at approx. 1˚
MORE
than the
Y Max.
setpoint.
MV Auxiliary-Switch (Yellow):
Set the switch to trip at the
desired setpoint using the scale under the Red ST1 switch.
When the motor is at 0˚, the NC contact 4 and 3 opens,
and the NO contact 4 and 2 closes.
EXAMPLE
ST1:
Set at approx. 1˚ LESS than the Y Min. setpoint.
ST2:
Set at approx. 1˚ MORE than the Y Max. setpoint.
MV:
Set at approx. 10˚ While driving the Motor CCW
towards 0˚, the NC contact 4 and 3 opens, and the
contact 4 and 2 closes.
707
710
712
715
720
Max. lb-in
560
750
875
940
1190
Summary of Contents for BELTOMATIC
Page 1: ...OPERATORS MANUAL...
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Page 180: ...Exhibit Q 1...