Basic Documentation

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Description
Powermite SQS65 and SQS65.5 Electronic Valve Actuators require a
24 Vac supply and receive a 0 to 10 Vdc or a 0 to 1000 Ohm control
signal to proportionally control a valve. SQS85.53 electronic valve
actuators require a 24 Vac supply and receive a oating control
signal to provide oating control. Actuators work with Powermite
MT Series Valves with a 7/32-inch (5.5 mm) stroke.
Features
• Maintenance-free with reversible motor
• Voltage or resistance signal input
• Close off up to 160 psi
• Position output signal 0 to 10 Vdc
• Small, compact design
• Manual adjustment knob with indication of stroke allows for
repositioning in power-off condition (SQS65U actuator only)
• Mechanical spring allows the valve to return to normal position
in power off condition (SQS65.5U and SQS85.53U)
• Suitable for low pressure (15 psig) steam applications
Applications
TheSQSElectronicValveActuatorsareforuseinsmalltomedium
HVACinstallationswithPowermiteMTSeriesvalvesthathavea
7/32-inch(5.5mm)stroke.
Recommendation
Use only with the MT Series valve bodies. The SQS85.53U actuator
is not recommended for 2-position or pulse applications.
Wiring Diagrams
Specications
Operating Voltage
60 Hz ................................................................................. 24 Vac, ±20%
Frequency ........................................................................................ 60 Hz
Power Supply ............................................ Earth Ground Isolating, Class 2,
24 Vac Transformer
Do not power more than 10 actuators with one transformer.
Power Consumption
SQS65U ........................................................................................4.5 VA
SQS65.5U ........................................................................................7 VA
SQS85.53U ......................................................................................5 VA
Proportional Control Signal (SQS65U, SQS65.5U)
Voltage (Y) ........................................................................... 0 to 10 Vdc
Resistance (R) ............................................................... 0 to 1000 Ohms
Position Output (U)
Voltage ..............................................................................0 to 10 Vdc
Floating Control Signal (SQS85.53U)
Y1 ..................................... 24 Vac, Power Extends Actuator Shaft (0 to 1)
Y2 ..................................... 24 Vac, Power Retracts Actuator Shaft (1 to 0)
Running Time at 60 Hz .................................................................. 30 sec.
Spring Return (SQS65.5U, SQS85.53U) ......................................... 8 sec.
Nominal Stroke ................................................................. 7/32” (5.5 mm)
Nominal Force ................................................................... 90 lbf. (400 N)
Agency Approvals ...............................................................UL/cUL, UL873
CSA C22.2 No. 24-93
Ambient Temperature
Operation ...........................................................23 to 122°F (-5 to 50°C)
Transport and Storage ......................................-13 to 149°F (-25 to 65°C)
Ambient Humidity ...................................... 0 to 90% RH, Non-condensing
Wiring Connection ................ Plenum Cable or Conduit via a 1/2” Knockout
Mounting Location ................................................ NEMA 1 (Interior Only)
SQS Series Electro-Mechanical Valve Actuators
Spring Return or Non-Spring Return
24 Vac, Floating or Proportional Control
EA0802R2
24
Vac
CONTROLLER
EARTH GROUND
ISOLATING CLASS 2
24 Vac TRANSFORMER
120 Vac
NEUT
SQS85.53U
21
Y2
Y1
G
1
0
0
SQS65/65.5 Actuator SQS85.53 Actuator