Datasheet Content
MT4000 Series
SERVO MOTORS FOR AIR DAMPERS AND BUTTERFLY VALVES
INSTRUCTION SHEET
Supply voltage
Line voltage: 220 ... 240 Vac, 50/60 Hz
110 Vac, 50/60 Hz
Maximum voltage
Current of micro--switches: 250 Vac, 10A (ac) and 2A(dc)
Ambient temperature range
--15 ... 60 °C
Relative humidity: 0 -- 90% at 40 oC (non--condensing)
Rated torque value
Maximum torque at 6s rotation time over 90 degrees: 1.5 Nm
Maximum torque at 12s rotation time over 90 degrees: 1.5 Nm
Maximum torque at 24s rotation time over 90 degrees: 3.0 Nm
Maximum diagonal force
300N, when mounted with 4 screws
Stroke timing over 90 degrees
6, 12, 24 and 30 s at 50 Hz
At 60 Hz, the timing is reduced with approximately 20%
APPLICATION
Maximum adjustable stroke
The MT4000, MT4001, MT4002 and MT4003 are servo 0 to 160 degrees
motors to control and govern air lock of gaseous and liquid Enclosure
fuels. IP40
The servo motors are suitable in burners with small to
medium capacity. Minimum camshaft step
2 degrees (including mechanical tolerances)
SPECIFICATIONS Electrical connection
Two PG9 wiring conduits are provided in the housing.
NOTE: Do not provide strain--relief according to
Models EN60730
MT4000A series for combustion air dampers and VF5000 Finish
butterfly valves. External signals for modulation required.
The servo motor is mounted in a black housing and
MT4000B series for combustion air dampers and VF5000 transparent plastic cover, which can be removed by loosening
butterfly valves. Including relay for one external modulation 2 screws.
input.
MT4001A series for air dampers in gas burners. To be used Pre--purge timer (MT4003C only)
with full featured ignition controllers and 3 wire thermostats. 20 seconds, tolerance --0 s, +10 s.
MT4001B series for air dampers in gas burners. To be used Design life
with full featured ignition controllers and 2 wire thermostats.
MT4001C series can be used with satronic TMG740. The Model Number of Cycles
ignition controller is providing the burner sequence, including All models
the drive to high fire during pre--purge. MT4000 250.000
MT4002B series for air dampers in oil burners. Including relay Series
for 2 wire thermostat connection.
MT4003C series can be used with standard low featured Standards and approvals
ON/OFF ignition controllers,where the pre--purge is provided The MT4000 Series conform with the folowing EC directives:
by the servomotor. Including relays for 2 wire thermostat
• Low Voltage Directive (73/23/EEC)
connection, low fire adjustment switch and fail safe pre--purge
timer. PIN: 0063AR1582
Dimensions • Electro Magnetic Compatibility Directive (89/336/EEC)
See Fig. 1. Installation drawing MT4000 Series • EN298 for MT4003C with pre--purge timer
EN2C-0035SZ20 R0604
INSTALLATION
IMPORTANT
1. Installer must be a trained experienced service 4. The appliance manufacturer’s instructions should
man. be followed when provided.
2. Disconnect power supply to prevent electrical 5. Carry out a thorough checkout when installation is
shock and/or equipment damage. completed.
3. When the MT4000 is used in stand alone
applications, use a proper strain--relief
Low fire adjustment switch
(optional)
0
Fig. 1. Installation drawing MT4000 Series
Mounting and orientation
There are no restrictions in the mounting angle of the motor.
The motor can be assembled by 4 screws. For mounting hole
dimensions, see installation drawing.
ADJUSTMENT AND CHECKOUT
Adjustment for cams
WARNING Disconnect power supply and remove the cover. Use
• Adjustment should be made by qualified personnel only. adjustment tool inside the cover to adjust the cams. Place the
• If the appliance manufacturer supplies checkout and/or tool in one of the cam grooves to turn the cam in steps of
service and maintenance instructions, carefully follow approximately 2 degrees.
them.
Factory set “zero position”
• All adjustments on the cams should be done after
disconnecting the power supply. All motors are factory set with zero position corresponding
with 45 degrees angle of flat surface on actuator shaft (see
Functions of cams:
figure 1.).
MT4000 A/B series MT4001 A/B/C, MT4002B When field re--adjustment of zero position is necessary, rotate
& MT4003C series cam II (clock or counter--clockwise) to zero position and
cam cam re--adjust arrow on scale manually.
I high fire position of I high fire position of Low fire adjustment switch (optional)
air damper motor air damper motor
A push button switch, to activate electrically movement of the
II closed position of II closed position of air cam assembly, independent from the flame relay signals, is
the air damper motor damper motor optional on MT4001B, MT4001C, MT4002B and MT4003C
III auxiliary switches III low fire position of air type of servo motors.
damper motor Use the push button switch to move the cam assembly
forward during (re)adjustment of the low fire position of the
IV auxiliary switches IV low fire position of air damper. When this push button is pressed down, the motor
damper motor
will drive to high fire position. When the push button is
V switches the second released, the motor will drive to low fire position.
stage operation of Depending on type, it is positioned either on left or right side
the gas valves of the front plate.
EN2C-0035SZ20 R0604 2
Cam adjustment for servo motors with right hand rotation Cam adjustment for servo motors with left hand rotation
MT4000A/B series MT4000A/B series
cam cam
I/III Rotate the cam clockwise to increase the opening I/ III Rotate the cam counter--clockwise to increase
& position of the air damper & the opening position of the air damper
IV Rotate the cam counter--clockwise to decrease IV Rotate the cam clockwise to decrease the
the opening position of the air damper opening position of the air damper
II Factory set at 0 degrees, to start air damper in II Factory set at 0 degrees, to start air damper in
closed position closed position
MT4001A/B/C, MT4002B & MT4003C series MT4001A/B/C, MT4002B & MT4003C series
cam cam
I Rotate the cam clockwise to increase the high fire I Rotate the cam counter--clockwise to increase te
psition of the air damper high fire position of the air damper
Rotate the cam counter--clockwise to decrease Rotate the cam clockwise to decrease the low fire
the low fire position of the air damper position of the air damper
II Factory set at 0 degrees, to start the air damper II Factory set at 0 degrees, to start the air damper
in closed position in closed position
III/IV Rotate cam clockwise to increase the low fire III/IV Rotate cam counter--clockwise to increase the
position of air damper low fire position of air damper
Rotate cam counter--clockwise to decrease the Rotate cam clockwise to decrease the low fire
low fire position of the air damper position of the air damper
V Rotate the cam clockwise, to delay the switching V Rotate the cam counter--clockwise, to delay the
of the second stage gas valve switching of the second stage gas valve
Rotate the cam counter--clockwise, to…
