Powermite 599
Technical Instructions
Document No. 155-314P25
EA 599-16
August 1, 2007
MT Series SSC Electronic
Valve Actuator, 24 Vac
Floating Control (3-Position)
EA1157R1
Siemens Building Technologies, Inc.
Description
The Powermite 599 MT Series SSC81U and SSC81.5U electronic valve actuators
require a 24 Vac supply to provide a floating control signal. These actuators control
Powermite 599 MT Series valves with a 7/32-inch (5.5 mm) stroke and a threaded
valve bonnet that fits the actuators.
Features
•
UL listed for plenum installations
•
Direct-coupled installation without special tools (hand-tightened)
•
Manual
override
•
Visual position indication
Application
The Powermite 599 Series MT Series SSC81 electronic actuators and MT Series
valves are used in heating and cooling applications. They are used in liquid and steam
applications that require an actuator. The SSC81 series accepts plenum cable or 3/8-
inch flex conduit connection.
Product Numbers
Table 1. Product Numbers.
Actuator Operating
Mode
Actuator Prefix
Code
SSC81U
Non-Spring Return
(Fail-in-Place)
259
SSC81.5U
Spring Return
(Fail-Safe)
260
Ordering a Valve
Plus Actuator
Assembly
To order a complete valve plus actuator assembly from the factory, combine the
actuator prefix code with the suffix of the valve product number. See
Technical Bulletin
TB251, Powermite 599 Series MT Series Terminal Unit Valve and Actuator Assembly
Selection
(155-306P25) for selection procedures.
To order an actuator only, use the product number.
