Install Instructions

I&M No. V 8860 R2
Installation & Maintenance Instructions
HYDRAMOTOR® PUSH-TYPE LINEAR ACTUATOR
WITH GENERAL PURPOSE OR WATERTIGHT ENCLOSURE
SERIES
AH2E
ASCO Valves®
©ASCO Valve, Inc.® 50 Hanover Road, Florham Park, New Jersey 07932 www.ascovalve.com
E226360 - 5/12
All Rights Reserved.
I&M No. V 8860 R2
WARNING
AH2E actuator assembly
Nameplate/electrical
cover
Conduit
knockouts
Cover screw
Valve assembly
Valve stem position indicator
Damper arm
(optional)
Mounting set screw
AH2E Actuator and V710 Valve Assembly
Figure 1
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).