Honeywell Pneumatic Controls - MP516 Pneumatic Unit Ventilator Damper Actuator; Unit Vent

Damper Actuator
Humidistats
and
Thermostats Controllers Sensors Relays Switches Actuators Valves Accessories
Engineering
Guide
Cross
Reference
70-6925 73
MP516 Pneumatic Unit Ventilator Damper Actuator
Used to control the damper on unit ventilators. Can be adapted to
various unit ventilator control cycles. Replacement devices are
available for Johnson, Powers, Robertshaw, Barber-Colman, and
older Honeywell unit ventilator damper actuators.
• Constructed of strong zinc die castings.
• Hesitation feature available for unit ventilator cycles requiring a
minimum percentage of outdoor air.
Dimensions in inches (millimeters) MP516A Typical Piping
Actuator Type: Damper
Fail Safe Mode: Spring Return
Air Connections: 1/8 in. NPT
Stroke: 2-1/8 in. to 2-1/2 in. (54 mm to 63 mm)
Diaphragm Effective Area: 11 sq in. (71 sq cm)
Temperature Range:
-20 F to +160 F (-29 C to +71 C)
Maximum Operating Pressure: 25 psi (172 kPa)
Humidity Range: 5 to 95% RH
Accessories:
26025B Damper crank arm for 3/8 in. (9.5 mm) diameter axle.
Elongated slot for linkage connection. Slot scaled for 40-50-60-75-90
degrees.
27174B Damper crank arm for 7/16 in. (11.1 mm) diameter axle.
Elongated slot for linkage connection. Slot scaled for 40-50-60-75-90
degrees.
27520C Push Rod (5/16 in. dia., 12 in. length)
27520G Push Rod (5/16 in. dia., 24 in. length)
27520K Push Rod (5/16 in. dia., 36 in. length)
27520L Push Rod (5/16 in. dia., 48 in. length)
309389J Mounting Bracket and Linkage
312867C Damper Crank Arm for 1/2 in. (12.7mm) diameter axle.
Elongated slot for linkage connection. Slot scaled for 45-60-75-90
degrees
315321 Crankarm Balljoint (with 1/4 in male threads), fits 5/16 in.
diameter pushrod
ALTERNATE POSITION
FOR SUPPLY AIR
CONNECTION
TOP VIEW
5 (27)
2-13/16
(71)
SIDE VIEW
1/8 (3) NPT AIR
CONNECTION (2)
3/4-16 MOUNTING STUD
5/8 (16)
9/32 (7)
7/16 (11)
4-3/8
(111)
2-1/2
(64)
2-1/2 (64)
MAX.
TRAVEL
2-1/16 (52)
MIN. TRAVEL
M27104
M5440A
MAY BE SURFACE MOUNTED OR ATTACHED TO MP516A.
1
1
M
RESTRICTION
THERMOSTAT
AIRSTREAM
THERMOSTAT
TO FAN
INTERLOCK
E/P RELAY
ATM
MP516A
VALVE
1
2
3
MB
Product Number
Actuator
Force
Spring Range
Comments(psi) (kPa)
MP516A1087 Medium 3 psi to 12 psi 21 kPa to 83 kPa The lever arm moves to the desired minimum position as air pressure increases
from 0 to 3 psi, hesitates from 3 to 8 psi, and completes its stroke from 8-12 psi.
MP516A1095 Medium 4 psi to 8 psi 28 kPa to 55 kPa No hesitation.
MP516A1103 Medium 5 psi to 12 psi 34 kPa to 83 kPa No hesitation.