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Cam adjustment for servo motors with right hand rotation
MT4000A/B series
cam
I/III
Rotate the cam clockwise to increase the opening
&
position of the air damper
IV
Rotate the cam counter--clockwise to decrease
the opening position of the air damper
II
Factory set at 0 degrees, to start air damper in
closed position
MT4001A/B/C, MT4002B & MT4003C series
cam
I
Rotate the cam clockwise to increase the high fire
psition of the air damper
Rotate the cam counter--clockwise to decrease
the low fire position of the air damper
II
Factory set at 0 degrees, to start the air damper
in closed position
III/IV
Rotate cam clockwise to increase the low fire
position of air damper
Rotate cam counter--clockwise to decrease the
low fire position of the air damper
V
Rotate the cam clockwise, to delay the switching
of the second stage gas valve
Rotate the cam counter--clockwise, to advance
the switching of the second stage of the gas valve
ELECTRICAL CONNECTIONS
IMPORTANT
Protective earth wires of external connected devices
etc. should be connected to the MT4000 earth
terminal according the manufacturer's instructions
(max. 2 devices)
drive to
drive to
high fire
low fire
neutral
1
2
3
4
N.O.
auxiliary switch
Fig. 2. Wiring Diagram MT4000A
6
8
5
7
9
C.
N.C. N.O.
C.
N.C.
auxiliary switch
Cam adjustment for servo motors with left hand rotation
MT4000A/B series
cam
I/ III
Rotate the cam counter--clockwise to increase
&
the opening position of the air damper
IV
Rotate the cam clockwise to decrease the
opening position of the air damper
II
Factory set at 0 degrees, to start air damper in
closed position
MT4001A/B/C, MT4002B & MT4003C series
cam
I
Rotate the cam counter--clockwise to increase te
high fire position of the air damper
Rotate the cam clockwise to decrease the low fire
position of the air damper
II
Factory set at 0 degrees, to start the air damper
in closed position
III/IV
Rotate cam counter--clockwise to increase the
low fire position of air damper
Rotate cam clockwise to decrease the low fire
position of the air damper
V
Rotate the cam counter--clockwise, to delay the
switching of the second stage gas valve
Rotate the cam clockwise, to advance the
switching of the second stage of the gas valve
drive
signal
neutral
line
1
2
3
Fig. 3. Wiring Diagram MT4000B
3
6
8
4
5
7
N.O.
C.
N.C. N.O.
C.
auxiliary switch
auxiliary switch
EN2C-0035SZ20 R0604
9
N.C.
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