Maxitrol EXA E40 Series User manual

Read these instructions carefully. Failure to follow them
could result in a re or explosion causing property damage,
personal injury, or loss of life.
Service and/or installation must be performed by a trained,
experienced service technician.
EXA Modulating E40, E50, E60 Valve Series
Figure 1: EXA Modulating Valve Series
1
© 2019 Maxitrol Company, All Rights Reserved.
PATENT PENDING
The E40(H), E50(H), E60(H) modulating valves are highly
accurate and precise modulating control valves (see gure 1).
EXA valves provide repeatable process control with minimal
hysteresis throughout the entire range of modulation.
The EXA modulation system’s high re setting and low re
setting are user programmable.
The EXA modulating valve series has a built-in digital controller
that provides a seamless interface with a process controller.
The valve has two (2) buttons and a communication LED for
the user interface. The buttons are used to set high and low re
settings (see gure 4, page 4).
The valve has full open and full close (not gas tight) mechanical
limits. The user can program settings that are within the valve’s
mechanical limits. This added dimension for sizing and applying
the valve is an important feature. It allows the valve to be set
up for an entirely different net output characteristic (dependent
upon supply pressure) (see table 1, page 2).
There are six (6) electrical connections on the EXA valve. Two
(2) are for power, two (2) are for the control signal, and two (2)
are for position feedback (see gure 2, page 2).
Disconnect power before installation to prevent electrical
shock, equipment or control damage.
WHAT TO DO IF YOU SMELL GAS
1. Do not operate any appliance.
2. Do not touch any electrical switch; do not use any
phone in your building.
3. Immediately evacuate the area and contact the gas
supplier. Follow the gas supplier’s instructions.
4. If you cannot reach the gas supplier, call the re
department.
This control must be installed and operated strictly in
accordance with the instructions of the OEM and with
all applicable government codes and regulations, e.g.
plumbing, mechanical, and electrical codes and practices.
These instructions do not supersede OEM’s installation or
operating instructions.
© 2019 Maxitrol
Maximum Inlet Pressure: 5 psig
NOTE: Up to 10 psig available, consult Maxitrol Company.
Power Requirements: 24 VAC/DC +/- 10% 50/60 hz
NOTE: The E40H, 50H, 60H use half-wave rectiers.
When using a single transformer for powering the E40H,
50H, 60H and devices with half-wave rectiers, the
common for each must be connected to the same leg
of the transformer. Control signal devices with full-wave
bridge rectiers require a separate transformer.
See “Power Supply Compatibility” bulletin.
Maximum Current Draw: 200mA
Temperature Limits: -40ºF to 150ºF operating
Control Signal (user selectable): 0-10 VDC, 2-10 VDC,
0-20 mA, 4-20 mA; 100KOhm Input Impedance
Mounting: Multipoise
Gases: Suitable for natural, manufactured, mixed gases,
liqueed petroleum gases, and LP gas-air mixtures.
Certications:
EMC (EN 61000:2001)
Immunity (EN 61000-6-2:2001)
Emissions (EN 61000-6-4:2001)
UL Recognized
Enclosure: IP40
Electrical Connection: UL310
Sizes: E40: 3/8”, 1/2” NPT or Rp ISO 7-1
E50: 1/2”, 3/4” NPT or Rp ISO 7-1
E60: 3/4”, 1” NPT or Rp ISO 7-1
DESCRIPTION
SPECIFICATIONS

DIP Switch Position Table
Control
Signal
SW1
Signal
SW2
Offset
SW3
Characteristic
0-10V OFF OFF OFF
2-10V OFF ON OFF
0-20 mA ON OFF OFF
4-20 mA ON ON OFF
2
© 2019 Maxitrol Company, All Rights Reserved.
EXA Modulating Valve Series
The PWM output will give a feedback to correspond with the
current valve position between the programmed minimum and
maximum positions. The duty cycle range is always scaled
from the programmed minimum to the programmed maximum
position.
Frequency: 200 Hz ± 1 Hz
Resolution: 9-bit (0.29% duty cycle)
Duty Cycle: 3% @ programmed minimum position
97% @ programmed maximum position
Output Impedance: 3.2 kΩ ± 0.1 kΩ
Output High Voltage: 5.0 V nominal
5.25 V maximum
NOTE: Output high level varies with the load current at the
PWM output.
Output Low Voltage: 0.0 V + 0.01 V
Pin 1: (+) positive polarity
Pin 2: (-) negative polarity
(see Figure 2)
Connection: TYCO MTA-100 or EQ.
NOTE: Optional pre-wired connector for control signal/power/
feedback available. Contact Maxitrol Customer Service
for details and availablity.
Table 3: Dip Switch Position Table
Flow Capacity in Btu/h @ 1” Pressure Drop:
Model Nat Gas LP
EXA40 (3/8”) 190K 315K
EXA40 (1/2”) 215K 355K
EXA50 (1/2”) 385K 640K
EXA50 (3/4”) 435K 725K
EXA60 (3/4”) 670K 1115K
EXA60 (1”) 780K 1300K
Table 1: Sizing Chart
SPECIFICATIONS CONTINUED
Sizing
Valve sizing and selection is based on the typical 1.0” w.c.
pressure drop allowance at maximum ow rate. Using the sizing
chart (table 1), nd the closest ow rate which meets or exceeds
the appliance’s maximum modulated ow rate.
POSITION FEEDBACK OUTPUT SPECIFICATION
Figure 2: EXA Modulating Valve Series Connections
Power:
Terminal 4
Terminal 3
Position Feedback:
Pin 1
Pin 2
Control Signal:
Terminal 1
Terminal 2
DIP Switches
(Table 3)
Table 2: Connection Table
© 2019 Maxitrol
Control Signal
The control signal indicates a position within the valve’s
programmed range of modulation.
NOTE: Control signal is polarity sensitive. Connect control
signal positive (+) to terminal 1 and control signal
return (-) to terminal 2 (see table 2).
The control signal is “scaled” between the high and low re
setting of the valve. The minimum control signal will correspond
to the programmed low re setting, and the maximum control
signal will correspond to the programmed high re setting.
Connection Table
Terminal 1 Terminal 2 Terminal 3 Terminal 4
Signal (+) Signal (-) Power (+) Power (-)
DIP Switches
A three (3) position DIP switch is located on the PCB (see Figure
2). Change the signal type and offset by changing the position
of DIP switches. (For DIP switch position and corresponding
current/voltage ranges, see Table 3).

Model # Swing Radius
(SR)
Dimensions
inches (millimeters)
A B C D E F
EXA40 4.0
(102)
4.8
(122)
1.0
(26)
2.1
(54)
3.7
(94)
2.4
(61)
2.4
(61)
EXA50 4.3
(110)
5.5
(140)
1.3
(34)
3.4
(87)
3.7
(94)
3.3
(84)
2.4
(61)
EXA60 4.6
(117)
6.0
(153)
1.5
(39)
4.1
(105)
4.1
(105)
3.9
(100)
2.4
(61)
3
EXA Modulating Valve Series
Figure 3: EXA Modulating Valve Series Dimensions
B
A
F
SR
E
C
D
B
A
F
SR
E
C
D
Table 4: Dimensions
B
A
F
SR
E
C
D
© 2019 Maxitrol
© 2019 Maxitrol Company, All Rights Reserved.
DIMENSIONS
NOTE: Dimensions are to be used only as an aid in designing clearance for the valve. Actual production dimensions may vary
somewhat from those shown (see Table 4 and Figure 3).

4
Maxitrol Company
23555 Telegraph Rd., P.O. Box 2230
Southeld, MI 48037-2230 U.S.A.
www.maxitrol.com
© 2019 Maxitrol Company,
All Rights Reserved.
EXA_X1_MS_EN_06.2019
EXA Modulating Valve Series
Figure 4: EXA Modulating Valve Series Adjustment Controls
Button 1 Button 2
LED
© 2019 Maxitrol
To enter into the low re setting mode, press and hold Button
#2 until the LED light blinks red. Release. The valve is now in
the low re setting mode. buttons #1 and #2 are used to set the
desired low re setting.
To decrease gas ow slowly, press button #2. Each button press
will decrease gas ow by the minimum available step size. To
decrease gas ow rapidly, hold button #2. Holding the button
down allows the valve to auto step and eliminates the need to
repeatedly press the button.
To increase gas ow slowly, press button #1. Each button press
will increase gas ow by the minimum available step size. To
increase gas ow rapidly, hold button #1. Holding the button
down allows the valve to auto step and eliminates the need to
repeatedly press the button.
To save the low re setting, simultaneously hold Buttons #1 and
#2 until the blinking LED turns OFF.
NOTE: Controls left in any setting mode will default to the
current settings and return to normal operating mode
after 5 minutes of inactivity.
LOW FIRE SETTING - BUTTON #2
The EXA STAR modulating valve series has two (2) buttons and
a communication LED for the user interface. The buttons are
used to set the valve for high and low re settings (see gure 4).
1. High Fire Setting (LED will be solid red)
2. Low Fire Setting (LED will be blinking red)
3. Operating Mode (LED will be OFF)
CONNECTIONS
VALVE SETTING
Step 1: Remove 2 screws holding cover.
Step 2: Switch power and control signal off.
Step 3: Connect switched OFF 24V (AC/DC) power source to
terminals 3 and 4. Note polarity when using a DC power
source or if one leg of an AC transformer secondary is
externally grounded or is sharing power with another
half-wave device (see gure 2, page 2).
Step 4: Set DIP switches to match available control signal
(see table 3, page 2).
Step 5: Connect control signal to terminals 1 and 2.
Observe polarity. Note that the return, or signal
ground, must be connected to terminal 2 (see gure
2, page 2).
Step 6: Switch power and control signal ON.
Step 7: Set valve (see “Valve Setting” in section below).
Step 8: Replace cover.
To enter the high re setting mode, press and hold Button #1
until the LED lights solid red. Release. The valve is now in the
high re setting mode. Buttons #1 and #2 are used to set desired
high re setting.
To increase gas ow slowly, press button #1. Each button
press will increase gas ow by the minimum available
step size. To increase gas ow rapidly, hold button #1.
Holding the button down allows the valve to auto step
and eliminates the need to repeatedly press the button.
To decrease gas ow slowly, press button #2. Each button press
will decrease gas ow by the minimum available step size. To
decrease gas ow rapidly, hold button #2. Holding the button
down allows the valve to auto step and eliminates the need to
repeatedly press the button.
To save the high re setting, simultaneously hold buttons #1 and
#2 until the LED turns OFF.
NOTE: Controls left in any setting mode will default to the
current settings and return to normal operating mode
after 5 minutes of inactivity.
HIGH FIRE SETTING - BUTTON #1