Asco AH2E User Guide

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I&M No. V 8860 R2

Installation & Maintenance Instructions

HYDRAMOTOR® PUSH-TYPE LINEAR ACTUATOR

WITH GENERAL PURPOSE OR WATERTIGHT ENCLOSURE

WARNING

To prevent the possibility of death, serious injury or property damage, the Hydramotor® Actuator must be installed and serviced only by a qualiﬁ ed service technician avoiding the following hazards:

• Electrical hazard. Turn off all electrical power to

Hydramotor® Actuator.

• Risk of electric shock – More than one disconnect

switch may be required to de-energize the device for servicing.

• Pressure hazard. Depressurize valve and vent

hazardous or combustible ﬂ uid to a safe area before inspection or removal of the actuator or valve from service.

• Explosion, ﬁ re or toxic gas hazards. Extinguish

all open ﬂ ames and avoid any type of sparking or ignition during leakage testing.

Service Notices

See separate V710 Gas Valve Installation and Maintenance Instructions for information on: Operation, Positioning, Mounting, Piping, Strainer or Filter Requirements, Flow Controls, Preventive Maintenance, and Cause of Improper Operation.

Do not install an actuator with General Purpose Enclosure in a location subject to weather, wash down, or other sources for water ingress. Use watertight enclosure for these locations.

DESCRIPTION

AH2E Hydramotors® are self-contained linear, push-type actuators which extend when powered and retract by spring force upon power interruption.

The AH actuator is typically used for control of gas-ﬁ red heating equipment, commonly to open and close a valve or both a valve and damper. AH2E actuators position V710 Series gas valve

assemblies.

OPERATION

Application of electrical power simultaneously drives an electric pump and closes a normally-open dump valve, resulting in up to 250 pounds of force on the actuator stem. This extends the actuator stem and attached valve poppet, to open the valve and/

or damper.

Upon reaching the fully extended position, a travel limit switch interrupts power to the electric motor while maintaining power to the dump valve, thus stabilizing hydraulic pressure to hold shaft position. Position indicators on both sides of the actuator show the actual position of the valve stem.

Upon power interruption, the dump valve opens releasing hydraulic pressure, and allowing the return spring to retract the

stem and close the valve fully. Closing time is one second or less.

ACTUATOR / VALVE COMPATIBILITY

The AH2E series actuator is designed for use with ASCO V710 series valves only and is compatible with all ASCO V710 series

valves.

OPTIONAL FEATURES

• Damper Shaft Arm Is factory-mounted on RH side. The

arm is ﬁ eld-adjustable to 8 positions and can be switched to the LH side.

» Damper Arm Rating: Drives damper in one direction

only. 20 lb maximum at 2.85 in. radius at 20°F to 150°F (-7°C to 65°C ) and 10 lb maximum at -40°F to 20°F

(-40°C to -7°C). Damper spring and linkage must provide sufﬁ cient return force.

» Damper Arm Travel: 2”

• Auxiliary Switch One or two integral SPDT switches, ﬁ eld

adjustable to actuate at any position of stroke. This is not a safety switch.

• Overtravel Proof-of-Closure Switch A single factory set

non-ﬁ eld adjustable SPDT switch to be used in conjunction with V710 Series Gas Valves with overtravel seal (V22

orV25 sufﬁ x in catalog number).

AH2E actuator assembly

Nameplate/electrical cover

Conduit knockouts

Cover screw

Valve assembly

AH2E Actuator and V710 Valve Assembly

Figure 1

SERIES

AH2E

Valve stem position indicator

Damper arm (optional)

Mounting set screw

ASCO Valves®

E226360 - 5/12

I&M No. V 8860 R2

©ASCO Valve, Inc.® 50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com

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Speciﬁ cations

Force Output: 250 lbs

Stroke: 1 1/8” maximum

Electrical Characteristics:

Operating

Voltage /

Frequency

Current, in Amperes

Inrush Opening Holding

24/60 28 8.2 0.49

120/60* 5.6 2.1 0.09

240/60* 2.8 1.1 0.04

*Current increases by 20% for 50Hz operation.

Opening Time: Fast Opening: 6 to 14 seconds

Slow Opening: 14 to 26 seconds

Note:

• Opening time doubles below -30°F (-34°C).

• 50Hz operation increases opening time by 20%.

• Opening time is not ﬁ eld adjustable.

Maximum Closing Time: One second

Ambient Temperature and Duty Cycle Limitations

The actuator may be operated in ambient temperature conditions from -40°F to 150° F (-40°C to 65°C). Actuator can be cycled open / close continuously below 108°F (42°C) for 60Hz and below 90°F (32°C) for 50 Hz. See chart below for limitations (open / close cycles) at elevated temperatures.

NOTICE

The AH2E actuator is ﬁ tted with a self-resetting thermal cutout device. If the recommended temperatures and duty cycles above are exceeded, the thermal cutout may trip causing the actuator to stop in its current position during valve opening. The valve closing time remains one second or less regardless of thermal cutout trip. Once the actuator cools,the cutout will self-reset and the actuator will resume operation. If the cutout trips repeatedly, verify that the application is within the ambient temperature and the duty cycle limits of the actuator. If the application is within the speciﬁ ed operating limits and the cutout continues to trip, replace actuator.

INSTALLATION

Positioning/Mounting

Follow the V710 Series Gas valve and/or damper manufacturer’s instructions when installing the Hydramotor®.

1. AH2E actuators can be installed to operate in any position.

2. Check to ensure that the mounting gasket is in the proper

position, clean and without damage. Position the actuator to operate the valve (and damper if appropriate). Secure actuator with the three mounting set screws. Tighten set screws to 80 ± 5 in-lbs [9,0 ± 0,5 Nm] using a 5/32” hex key wrench. (See Figure 1)

Wiring (Refer to Figure 2)

WARNING: Electrical hazard. To prevent the possibility of death, serious injury or property damage, open all circuits before inspection, service or disassembly.

Wiring must comply with local codes and the National Electrical Code. Limit controls must conform with actuator rating (voltage, amperage, hertz). Wiring to meet NEC Class I, suitable for 90°C. Wire limit controls to the hot side of power supply.

1. Check the nameplate and conﬁ rm that the appropriate power

is being supplied to the unit. Remove the front cover (with nameplate) and set aside to access electrical connections taking care not to damage the cover gasket if supplied. A diagram is located on the inside of the cover to aid in making electrical connections.

2. Remove the desired electrical knock out and install appropriate

electrical ﬁ ttings. Type4 ﬁ ttings must be used with watertight units. Route wiring through the ﬁ tting. Take care not to scratch or otherwise damage the cover sealing surface when working on watertight enclosure.

3. Connect the power to terminals 1 and 2. The neutral wire, if

applicable, should be connected to terminal 1. Connect the ground wire to the grounding screw provided on the housing next to the terminal strip.

4. Torque terminal screws: 8 to 12 in-lbs [0.9 to 1.3 Nm]. Torque

ground screw: 20 to 25 in-lbs (2.3 to 2.8 Nm)

5. If a proof of closure or auxiliary switch is being used make

those electrical connections. Use the markings located on

the insulators to determine normally open and normally closed terminals. Torque electrical connection screws 8 to 12

in-lbs (0.9 to 1.3 Nm). Refer to auxiliary switch adjustment section on page 3 for instructions on adjusting switch. Proof of closure switches are set at the factory. Do not adjust proof of

closure switches.

6. Install the cover. Be certain that the gasket (if applicable)

and sealing surfaces are clean and there is no damage to the surfaces or gasket. Snug down all screws before tightening. Torque screws 20 to 25 in-lbs (2.3 to 2.8 Nm) evenly using a crisscross pattern starting in the middle and not in the corner.

7. If the damper arm is being used, connect linkage and adjust as

needed for proper operation of the damper. Damper Arm Adjustment: To reposition the damper arm,

remove the e-ring retainer and damper arm then reposition arm and reinstall e-ring. When repositioning arm onto the opposite side, remove e-rings on both sides and reposition and install on opposite sides. DO NOT remove the square damper shaft.

8. Operate actuator (with valve) through ﬁ ve cycles to verify

proper operation of valve and damper/ linkage system prior to use.

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I&M No. V 8860 R2

©ASCO Valve, Inc.® 50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com

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Ground screws

N or L2 Connect neutral to terminal 1 if applicable

Proof of

closure

auxiliary

switch

Connect to power

Travel limit switch

Do Not Adjust

Limit Switch Wiring

Figure 2

Auxiliary and Overtravel Proof-of-Closure

Switch Ratings

120VAC: 15 Amps, 1/3 HP

240VAC: 7.5 Amps, 1/2 HP Total connected load of auxiliary and overtravel proof-of -closure switches not to exceed 1800VA.

CAUTION: Overtravel Proof-of-closure switch must only be used with V710 Series Gas Valves having an overtravel seal (V22 or V25 Sufﬁ x in catalog number).

Overtravel Proof-of-Closure Switch

The optional valve overtravel proof-of-closure switch is set at the factory to provide both a mechanical and electrical means of proving valve closed position interlock to the primary control.

This switch is not to be ﬁ eld adjusted.

Optional

Auxiliary and Overtravel Proof-of-Closure

Switch Combinations (Partial Views)

Auxiliary

Single Auxiliary Switch

Figure 4

Proof-of-Closure

Proof-of-Closure Switch

Figure 5

Auxiliary Switch Adjustment (Refer to Figure 6)

Note: The Auxiliary switch is not a safety switch.

1. Before removing the cover, review WARNING

statements on page 1. Remove cover screws and nameplate/electrical cover (with gasket if ﬁ tted). Take care not to damage the sealing surfaces and cover gasket if supplied.

2. Insert 1/16” Allen key into adjusting screw on auxiliary

switch assembly.

3. Turn screw clockwise to move set point towards beginning

of actuator stroke. Turn screw counterclockwise to move setpoint toward the end of the actuator stroke. (approximately 8.5 turns from 0 to 100% travel)

4. Cycle the actuator to verify the switch setting and readjust

as required.

5. Install the cover. Be certain that the gasket (if applicable)

and sealing surfaces are clean and without damage. Snug down all screws before tightening. Torque screws 20 to 25 in-lbs (2.3 to 2.8 Nm) evenly using a crisscross pattern starting in the middle.

Aux. Left side Aux. Right side

Two Auxiliary Switches

Figure 3

Auxiliary Switch Adjustment

Figure 6

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I&M No. V 8860 R2

Adjust this screw

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MAINTENANCE

Before inspection, maintenance or rebuild, review WARNING statements on page 1. Maintenance should

include annual inspection and cleaning. Use a mild cleaning ﬂ uid, not aggressive solvents to remove dirt and oil. Organize a maintenance schedule based on environment and frequency of use. Check for loose electrical and mechanical connections and replace damaged parts. Do not remove the top cover for maintenance. There are no serviceable parts contained inside the actuator housing.

Field Service Notice

Field service replacement kits are limited to the following:

1. Auxiliary Switch Replacement Kit 296804.

2. Proof of Closure Switch Replacement Kit 296806.

3. Travel Limit Switch Replacement Kit 296807.

4. Gasket and Screw Replacement Kit 296808.

Kit contains:

• Front cover gasket and screws

• Window o-ring and screws

• Mounting gasket and set screws.

To order, specify the kit or part number, as well as the actuator model number.

Travel Limit Switch Replacement (Refer to Figure 8)

1. Before removing the cover, review WARNING

statements on page 1. Remove the front cover (with nameplate) and set aside. Take care not to damage the cover gasket if supplied or sealing surfaces. A diagram is located on the inside of the cover to aid in making electrical connections.

2. Remove the two mounting screws.

3. Disconnect wiring from the travel limit switch taking care

not to strain the wire connection at the terminal.

4. Install new travel limit switch. Torque mounting screws 20

to 25 in-lbs (2.3 to 2.8 Nm). Travel limit switches are set at the factory. DO NOT adjust.

5. Plug terminal connections to travel limit switch.

6. Install the cover. Be certain that the gasket (if applicable)

and sealing surfaces are clean and without damage. Snug down all screws before tightening. Torque screws 20 to 25 in-lbs (2.3 to 2.8 Nm) evenly using a crisscross pattern starting at the middle.

7. Operate actuator (with valve) through ﬁ ve cycles to verify

proper operation prior to use.

Auxiliary Switch Replacement (Refer to Figure 7)

Note: The Auxiliary switch is not a safety switch.

1. Before removing the cover, review WARNING

2. Disconnect auxiliary switch wiring.

3. Remove two mounting screws and the auxiliary switch.

4. Install new auxiliary switch in the actuator making sure

that the fork of the switch actuation lever engages the indicator arm as shown in Figure 8.

5. Torque mounting screws 20 to 25 in-lbs (2.3 to 2.8 Nm).

6. Reconnect switch wiring and torque terminal screws 8 to

12 in-lbs (0.9 to 1.3 Nm).

7. See instructions on page 3 for auxiliary switch adjustment,

starting at Step 2.

Proof of Closure Switch Replacement

Same as auxiliary switch replacement except switch must NOT be adjusted.

Fork must engage arm as shown

Auxiliary Switch

Figure 7

Do not adjust this screw

Limit Switch

Figure 8

Gasket replacement

The gaskets have an adhesive attachment. Use a nonmarring tool to peel off the old gasket. Remove backing from new gasket and stick on in the same location as the old gasket.

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I&M No. V 8860 R2