Johnson Controls M9203-B Series User manual

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators

Installation Guide

Applications

The M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators are direct-mount actuators that operate on

AC 24 V power at 50/60 Hz, DC 24 V power, or AC 85 to 264 V power at 50/60 Hz. These bidirectional actuators

do not require a damper linkage, and are easily installed on round shafts from

1/4 to 1/2 in. (6 to 12 mm) or square shafts from

1/4 to 5/16 in. (6 to 8 mm) using the standard shaft clamp included with the actuator.

A single M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuator provides 27 lb·in. (3 N·m) running and

spring return torque. An integral line voltage auxiliary switch, available only on the M9203-xxB-2(Z) models,

indicates end-stop position, or performs switching functions within the selected rotation range.

Installation

The M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators mount directly to the surface in any

convenient orientation using two No. M3.5 x 9.5 mm self-drilling sheet metal screws and the anti-rotation bracket

(parts included with the actuator). No additional linkages or couplers are required. Electrical connections are

color-coded and identified with numbers permanently marked on the actuator cable. A tag on the actuator cable

identifies the electrical connections and wiring details are included on the actuator housing.

Parts Included

• M9203-Bxx-2(Z) actuator

• M9203-603 adjustable stop kit

• M9000-604 anti-rotation bracket with two

No. M3.5 x 9.5 mm, pan-head, cross-recessed (Phillips), self-drilling and self-tapping screws

IMPORTANT: Use this M9203-Bxx-2(Z) Series

On/Off Electric Spring Return Actuator only to control equipment under normal operating conditions. Where

failure or malfunction of the actuator could lead to personal injury or property damage to the controlled

equipment or other property, additional precautions must be designed into the control system. Incorporate and

maintain other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or

protect against failure or malfunction of the actuator.

IMPORTANT : Utiliser ce M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuator uniquement pour

commander des équipements dans des conditions normales de fonctionnement. Lorsqu'une défaillance ou un

dysfonctionnement du actuator risque de provoquer des blessures ou d'endommager l'équipement contrôlé ou

un autre équipement, la conception du système de contrôle doit intégrer des dispositifs de protection

supplémentaires. Veiller dans ce cas à intégrer de façon permanente d'autres dispositifs, tels que des systèmes

de supervision ou d'alarme, ou des dispositifs de sécurité ou de limitation, ayant une fonction d'avertissement ou

de protection en cas de défaillance ou de dysfonctionnement du actuator.

IMPORTANT: Do not install or use this M9203-Bxx-2 Series On/Off Electric Spring Return Actuator in or near

environments where corrosive substances or vapors could be present. Exposure of the electric actuator to

corrosive environments may damage the internal components of the device, and will void the warranty.

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators

Installation Guide

M9203-BUA-2, M9203-BUB-2,

M9203-BGA-2, M9203-BGB-2

M9203-BUA-2Z, M9203-BUB-2Z

Part No. 34-1791-24, Rev. F

January 2020

*34179124F*

34-1791-24, Rev. F

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators Installation Guide

Special Tools Needed

• 10 mm wrench/socket

• drill with Phillips bit, driver size 1

Dimensions

Figure 1: M9203-Bxx-2 Series On/Off Electric Spring Return Actuator Dimensions, in. (mm)

10 30

1/4 (6.5) Slot Width

5/16 (8) Slot Length

4-15/64

(107.5)

25/32

(20)

3-15/16

(82)

15/64

(6)

2-1/4

(57.5)

45/64

(18)

1-1/8

(28.7)

1-35/64

(39.2)

47/64

(18.7)

FIG:M9203_ Bxx_dim

4-55/64

(123.6)

6-3/8

(162)

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators Installation Guide

Accessories

Mounting

The M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators can be easily installed on dampers with round

shafts from 1/4to1/2in.(6to12mm) or square shafts from 1/4 to 5/16 in. (6 to 8 mm) using the standard shaft

coupler included with the actuator. If the damper shaft extends less than 3.31 in. (84 mm), see the Removable

Coupler section for further instructions. If the damper shaft extends less than 0.79 in. (20 mm), install a shaft

extension recommended by the damper manufacturer.

Table 1: Accessories and Replacement Parts (Order Separately)

Code Number Description

DMPR-KC003 7 in. (178 mm) Blade Pin Extension (without bracket) for Johnson Controls® Direct-Mount Damper

Applications (quantity 1)

Note: Available with damper and may be ordered separately

M9000-322 Weathershield Kit for Damper Application of M9203, M9308, and M9310 Series Electric Actuators

(quantity 1)

M9000-400 Jackshaft Linkage Adapter Kit (quantity 1)

M9000-560 Ball Valve Linkage Kit for applying M9104, M9203, and M9208 Series Electric Actuators to VG1000 Series

Valves (quantity 1)

M9000-561 Thermal Barrier Kit for M9000-560 Ball Valve Linkage. Extends M(VA)9104, M(VA)9203, and M(VA)9208

Series Electric Spring Return Actuators applications to include low pressure steam (quantity 1)

M9000-604 Replacement Anti-Rotation Bracket Kit for M9203, M9208, M9220, M9308, M9310, M9320, and M9335

Series Electric Actuators (quantity 1)

M9000-606 Position Indicator for Damper Applications (quantity 5)

M9000-607 Position Indicator for VG1000 Series Ball Valve Applications (quantity 5)

M9203-100 Remote Mounting Kit with Crankarm Kit (quantity 1)

M9203-110 Universal Mounting Kit without Crankarm Kit (quantity 1)

M9203-115 Universal Mounting Kit with Crankarm Kit (quantity 1)

M9203-150 Crankarm Kit (quantity 1)

M9203-250 Remote Mounting Kit with Crankarm Kit and Damper Linkage for D1300 Dampers (quantity 1)

M9203-601 Replacement Standard Coupler Kit (with Retainer) for Mounting M9203 Series Electric Spring Return

Actuators (quantity 1)

M9203-602 Replacement Retainer for M9203 Series Electric Spring Return Actuators (quantity 5)

M9203-603 Adjustable Stop Kit for M9203 Series Electric Spring Return Actuators (quantity 1)

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators Installation Guide

Counterclockwise (CCW) Spring Return Direction – Clockwise (CW) Powered Operation

For CCW spring return direction, mount the actuator to the damper shaft so that Side A of the actuator is away from

the damper as illustrated in Figure 2. With power applied, the actuator drives CW from the 0° position and spring

returns CCW.

Clockwise (CW) Spring Return Direction – Counterclockwise (CCW) Powered Operation

For CW spring return direction, mount the actuator to the damper shaft so that Side B of the actuator is away from

the damper as illustrated in Figure 3. With power applied, the actuator drives CCW from the 0° position and spring

returns CW.

Removable Coupler

If the damper shaft extends less than 3.31 in. (84 mm), mount the coupler on the face of the actuator closest to the

damper.

Figure 2: Actuator Side A

FIG:M9203_Bxx_A

Figure 3: Actuator Side B

50 30

FIG: M920 3_Bx x_B

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators Installation Guide

If the damper shaft extends less than 0.79 in. (20 mm), a shaft extension is required to mount the actuator.

To change the coupler’s position, see Figure 4 and proceed as follows:

1. Mount the coupler on either Side A or Side B of the actuator as determined by the shaft length.

2. Snap the locking clip securely into the coupler retention groove to retain the coupler.

Mounting the Actuator

To mount the actuator, proceed as follows:

1. See the dimensions in Figure 5 and Table 2 to ensure the correct positioning of the anti-rotation bracket.

2. Bend or cut the anti-rotation bracket to fit the damper frame or duct as illustrated in Figure 6.

Note: The anti-rotation bracket can be bent to fit a round damper.

3. Mark or drill mounting holes in the damper frame or duct using the anti-rotation bracket as a guide (based on

the measurements obtained in Table 2 and Figure 5).

Table 2: Dimensions from Anti-Rotation Bracket to Shaft Center

Shaft Diameter,

in. (mm)

Dimension A,

in. (mm)

Dimension B,

in. (mm)

1/4 to 1/2 (6 to 12) 4-27/32 (123) 3-5/8 (92)

IMPORTANT: The tab on the anti-rotation bracket must fit midpoint in the actuator slot. Positioning the tab

midpoint in the slot prevents actuator binding and premature wear, and makes actuator removal easier.

Figure 4: Changing the Coupler Position

FIG:ex p_cplr

Figure 5: Positioning the Anti-Rotation Bracket

10 10

FIG:M9203_Bxx_ brk t

DIM. A

DIM. B

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators Installation Guide

4. Secure the anti-rotation bracket to the damper frame or duct using the two No. M3.5 x 9.5 mm

self-drilling sheet metal screws provided.

5. Slide the actuator onto the damper shaft, and position the anti-rotation bracket tab into the slot at the bottom of

the actuator as illustrated in Figure 6.

6. Rotate the damper blade(s) to the desired position if the power is lost.

7. Hold the actuator perpendicular to the damper shaft. Evenly hand-tighten each nut on the coupler U-bolt, then

torque the coupler U-bolt nuts to 100 to 125 lb·in. (11 to 14 N·m).

8. Apply power long enough for the actuator to travel a full stroke. Verify that the actuator rotates freely

throughout the range.

Limiting Rotation Range Using M9203-603 Adjustable Stop Kit

The actuator is factory set for 95° rotation, and its range is limited in 5° increments to a minimum of 35°. A stroke-

limiting stop can be attached in the field to the shaft coupler side of the actuator to reduce the rotation range.

Attaching the stroke-limiting stop in the furthest mounting position reduces the rotation range of the actuator by 5°.

Each progressive mounting position reduces the rotation range an additional 5°.

1. Check that the damper blade is visible or its position is permanently marked on the end of the damper shaft, as

illustrated in Figure 7.

IMPORTANT: Do not overtighten the mounting screws to avoid stripping the threads. Be certain that the tab on

the anti-rotation bracket remains properly positioned in the slot on the actuator, and that the actuator remains

parallel to the mounting surface.

Figure 6:

Anti-Rotation Mounting Bracket

FIG:M9203_ Anti-Rotn_Mntg_Brkt_Posn

2-1/4

(57.5)

3-1/4

(82.5)

Anti-Rotation Bracket

Damper Frame

Self-Drilling Sheet Metal Screws (2)

Figure 7: Damper Position

FIG:dampers

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators Installation Guide

2. Position the stroke-limiting stop in the serrated slot with its leading edge at the scale position matching the

desired stroke.

3. The product label marks hole positions for the M3-0.5 x 8 mm self-tapping screw provided with the adjustable

stop kit. Drive the screw through the slot in the adjustable stop and into the actuator face over a marked hole

position. (See Figure 8.)

Note: The minimum rotation range is 35°.

Wiring

See Figure 9 and Figure 10 to wire the applicable M9203-Bxx-2(Z) Series model.

Figure 8: Limiting Rotation Range

FIG:strk_limit

Figure 9: Control Wiring

AC 85...264 V 50/60 Hz

L1N

WHT BLK

AC 24 V 50/60

DC 24 V

RED

BLK

FIG:M9203Bxx2_wiring

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators Installation Guide

WARNING: Risk of Electric Shock.

Disconnect or isolate all power supplies before making electrical connections. More than one

disconnection or isolation may be required to completely de-energize equipment. Contact with

components carrying hazardous voltage can cause electric shock and may result in severe personal

injury or death.

AVERTISSEMENT : Risque de décharge électrique.

Débrancher ou isoler toute alimentation avant de réaliser un branchement électrique. Plusieurs

isolations et débranchements sont peut-être nécessaires pour -couper entièrement l'alimentation de

l'équipement. Tout contact avec des composants conducteurs de tensions dangereuses risque

d'entraîner une décharge électrique et de provoquer des blessures graves, voire mortelles.

CAUTION: Risk of Property Damage.

Do not apply power to the system before checking all wiring connections. Short circuited or improperly

connected wires may result in permanent damage to the equipment.

MISE EN GARDE : Risque de dégâts matériels.

Ne pas mettre le système sous tension avant d'avoir vérifié tous les raccords de câblage. Des fils

formant un court-circuit ou connectés de façon incorrecte risquent d'endommager irrémédiablement

l'équipement.

CAUTION: Risk of Property Damage.

Insulate and secure each unused wire lead before applying power to the actuator. Failure to insulate

and secure each unused wire lead may result in property damage.

MISE EN GARDE : Risque de dégâts matériels.

Isoler et protéger chaque fil non utilisé avant de mettre l'actuator sous tension. Le non-respect de cette

obligation d'isolation et de protection de chaque fil non utilisé risque d'entraîner des dégâts matériels.

IMPORTANT: Make all wiring connections in accordance with the National Electrical Code and local

regulations. Use proper Electrostatic Discharge (ESD) precautions during installation and servicing to avoid

damaging the actuator’s electronic circuits.

Figure 10: Auxiliary Switch Wiring Diagram

COM NC NO

21 22 23

BLK/

RED

BLK/

BLU

BLK/

GRY

FIG:aux_wring

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators Installation Guide

Using Conduit

All M9203-xxx-2(Z) Series Actuators accept 1/2 in. threaded electrician’s fittings.

1. Feed the actuator cables through the field supplied electrician’s fittings and conduit.

2. Thread the electrician’s fitting into the actuator and secure the conduit to the fitting in accordance with local

building code requirements.

Setup and Adjustments

Auxiliary Switch (M9203-xxB-x Models)

The M9203-xxB-x models include one integral auxiliary switch with a switch adjuster accessible on either face of

the actuator (see Figure 2 and Figure 3). The factory setting for the Auxiliary Switch is 11° closing (relative to the

0 to 90° rotation range as printed on the product label). See the Technical Specifications table for the auxiliary

switch ratings.

The switch point is continuously adjustable through the actuator’s rotation range. For the most accurate switch

positioning, see Figure 12 and use the method in the following example.

To change the switch point, proceed as follows:

1. Position the actuator in the full spring return position.

Note: The switch is factory set to trip when the actuator reaches the 11° position.

WARNING: Risk of Electric Shock and Property Damage.

Insulate and secure each unused wire lead before applying power to the actuator. Failure to insulate

and secure each unused wire lead may result in property damage, electric shock, and severe personal

injury or death.

AVERTISSEMENT : Risque de décharge électrique et dégâts matériels.

Isoler et protéger chaque fil non utilisé avant de mettre l'actuator sous tension. Le non-respect de cette

obligation d'isolation et de protection de chaque fil non utilisé risque d'entraîner des dégâts matériels,

des décharges électriques et des blessures graves, voire mortelles.

Figure 11: Adding Flexible Metal Conduit

FIG:add_cndt

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators Installation Guide

2. Rotate the switch adjuster until it points to the desired switch point.

3. Connect the Auxiliary Switch to a power source or an ohmmeter and apply power to the actuator. The actuator

moves to the fully open position and holds while power is applied.

4. Observe the switch point. If required, repeat Step 1 through Step 3.

Repair Information

A number of replacement parts are available; see Table 1 for more details. If an M9203-Bxx-2(Z) Series

On/Off Electric Spring Return Actuator fails to operate within its specifications, replace the unit. For a replacement

electric actuator, contact the nearest Johnson Controls representative.

Technical Specifications

M9203-Bxx-2(Z) Series On/Off Electric Spring Return Actuators (Part 1 of 2 )

Power

Requirements

-BGx-2 Models AC 24 V (AC 19.2 V to 28.8 V) at 50/60 Hz: Class 2 (North America) or Safety

Extra-Low Voltage (SELV) (Europe), 5 VA Running, 1.6 VA Holding Position

DC 24 V (DC 21.6 V to 28.8 V): Class 2 (North America) or SELV (Europe),

2.8 W Running, 0.8 W Holding Position

Minimum Transformer Size: 6 VA per Actuator

-BUx-2 Models AC 100 to 240 V (AC 85 V to 264 V) at 50/60 Hz: 0.06 A Running, 0.02 A

Holding Position

-BUx-2Z Models AC 100 to 240 V (AC 85 V to 264 V) at 50/60 Hz: 0.08 A Running, 0.02 A

Holding Position

Auxiliary Switch

Rating

-xxB Models One Single-Pole, Double-Throw (SPDT), Double-Insulated Switch with Silver

Contacts:

AC 24 V, 50 VA Pilot Duty

AC 120 V, 5.8 A Resistive, 1/4 hp, 275 VA Pilot Duty

AC 240 V, 5.0 A Resistive, 1/4 hp, 275 VA Pilot Duty

Spring Return Direction Is Selectable with Mounting Position of Actuator:

Actuator Side A Is Away from Damper or Valve: CCW Spring Return

Actuator Side B Is Away from Damper or Valve: CW Spring Return

Rated Torque Power On

(Running)

27 lb·in. (3 N·m) All Operating Temperatures

Power Off

(Spring Returning)

27 lb·in. (3 N·m) All Operating Temperatures

Rotation Range Maximum Full Stroke: 95°

Adjustable Stop: 35 to 95° Maximum Position

Figure 12: Switch Trip Point Settings

Switch Adjuster

FIG:swtch_sttng

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