Maxitrol EXA E40 Series Manuel utilisateur

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

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.

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

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

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)

EXA Modulating Valve Series

Figure 3: EXA Modulating Valve Series Dimensions

Table 4: Dimensions

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).

Maxitrol Company

23555 Telegraph Rd., P.O. Box 2230

Southeld, MI 48037-2230 U.S.A.

www.maxitrol.com

EXA_X1_MS_EN_06.2019

EXA Modulating Valve Series

Figure 4: EXA Modulating Valve Series Adjustment Controls

Button 1 Button 2

LED

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

Ce manuel convient aux modèles suivants

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