SIEMENS. P/N: SQS85.53U. ELECTRONIC VALVE ACTUATOR. 24VAC. 5 VA. 7/32" NOMINAL STROKE. 90 LB (400N) NOMINAL FORCE., 60HZ., IP54 ENCLOSURE., 3 POSITION., SPRING RETURN., POWERMITE (MT) 599 SERIES., FLOATING CONTROL., 23°F TO 122°F AMBIENT TEMPERATURE RANGE., 7/8" DIAMETER KNOCKOUTS FOR STANDARD 1/2" CONDUIT CONNE TOR., 30 SECONDS RUNNING TIME., 8 SECONDS SPRING RETURN TIME., OVERALL DIMMENSIONS: 5" LONG X 3 3/16" WIDE X 4 3/4" THICK., MOUNTS IN ANY POSITION., CAN BE USED IN LIQUID AND LOW PRESSURE STEAM SERVICE APPLICATIONS., MAINTENANCE-FREE WITH REVERSIBLE MOTOR., UL LISTED FOR PLENUM INSTALLATIONS., FLOATING CONTROL SIGNAL INPUT., SCREW ON COUPLING CONNECTION., ORIGINAL GENUINE SIEMENS OEM REPLACEMENT PART., GUARANTEED TO WORK PERFECTLY., BRAND NEW CONDITION., NEVER USED., INCLUDES: ONE ACTUATOR, INSTALLATION INSTRUCTIONS, PACKAGING AND BOX., I CAN SUPPLY MORE PICTURES IF REQUESTED.

The Powermite 599 MT Series SQS85.53U Electronic Valve Actuator requires a 24 Vac supply and provides floating control (three-position). The actuator controls Powermite 599 MT Series terminal unit valves with a 7/32-inch (5.5 mm) stroke. In the absence of power supply, a mechanical spring returns the valve to its normal position.

Siemens SQS85.53U Electronic Actuator Floating Control 3 Position Fail Safe. Works with Powermite 599 Series MT Series terminal unit valves with a 7/32-inch (5.5 mm) stroke.

Applications: small to medium HVAC installations with liquid and low pressure steam service applications.

The SQS85.53U Electronic Valve Actuator requires a 24 Vac supply and receives a floating control signal to provide 3-position control. With no control voltage or in the event of a power failure, a mechanical spring allows the valve to return to its normal (fail-safe) position.

Power Supply Earth ground, isolating Class 2, 24 Vac transformer.

• Maintenance-free with reversible motor.

• UL listed for plenum installations.

• Floating 3-position control signal input.

• Mechanical spring returns the valve to its normal (fail-safe) position in power-off condition.

Measurements: 4-3/4" H x 3-3/16" W x 5-1/16 D

Product Specifications:

 ●Ambient Temperature Range:5 to 122°F (-15 to +50°C) 

●Control Signal:3-position, floating 

●Fail Safe Mode:Fail Safe Spring Return  ●Frequency:5 to 122°F (-15 to +50°C) 

●Nominal Force:90 lbs. (400 N) 

●Operating Humidity Range (%RH):0 to 90% RH, non-condensing 

●Power Consumption:5 VA 

●Stroke (in):7/32” (5.5 mm) 

●Supply Voltage:24V 

●Timing, Nominal:@60Hz 30Sec. @ 50Hz 35