Greenheck S73 User Manual
The
High
Performance
Company
SERIES 73
ELECTRIC ACTUATOR
OPERATION AND MAINTENANCE MANUAL
Table Of COnTenTs:
page
Safety inStructionS: DefinitionS of termS................................................................. 2
introDuction
principle of operation.............................................................................................. 3
electrical operation................................................................................................ 3
mechanical operation.............................................................................................. 3
inStallation
pre-inStallation Storage......................................................................................... 3
mounting to valve.................................................................................................... 4
manual overriDe operation..................................................................................... 4
electrical inStallation............................................................. .............................. 5
multiple actuator wiring......................................................................................... 6/7
travel limit Switch aDjuStment............................................................................... 8
fielD or factory inStallable optionS
heater........................................................................................................................ 8
auxiliary SwitcheS.................................................................................................... 9
typical Single phaSe & Dc wiring DiagramS.......................................................... 10
appenDix a
baSic toolS................................................................................................................ 11
appenDix b
actuator troubleShooting chart........................................................................... 12
for information on thiS proDuct anD other bray proDuctS
pleaSe viSit uS at our webpage - www.bray.com
BRAY Series 73 Electric Actuator
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Operation and Maintenance Manual
1.0 safeTy InfOrmaTIOn - DefInITIOn Of Terms
WARNING indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury.
NOTICE used without the safety alert symbol indicates a potential situation which,
if not avoided, may result in an undesirable result or state, including
property damage.
1.1 HazarD-free use
This device left the factory in proper condition to be safely
installed and operated in a hazard-free manner. The notes
and warnings in this document must be observed by the
user if this safe condition is to be maintained and hazardfree operation of the device assured.
Take all necessary precautions to prevent damage to the
actuator due to rough handling, impact, or improper storage.
Do not use abrasive compounds to clean the actuator, or
scrape metal surfaces with any objects.
ground, tag and lock electrical circuits and equipment in
• accordance with established safety practices
• Is trained in the proper use and care of personal pro-
tective equipment (PPE) in accordance with established
safety practices
• Is trained in rst aid
• In cases where the device is installed in a potentially
explosive (hazardous) location – is trained in the operation, commissioning, operation and maintenance of
equipment in hazardous locations
The control systems in which the actuator is installed
must have proper safeguards to prevent injury to personnel, or damage to equipment, should failure of system
components occur.
1.2 QualIfIeD PersOnel
A qualied person in terms of this document is one who is
familiar with the installation, commissioning and operation of
the device and who has appropriate qualications, such as:
• Is trained in the operation and maintenance of electric
equipment and systems in accordance with established
safety practices
• Is trained or authorized to energize, de-energize,
2
WARNING
The actuator must only be installed, commissioned, oper-
ated and repaired by qualied personnel.
The device generates large mechanical force during normal
operation.
All installation, commissioning, operation and maintenance
must be performed under strict observation of all applicable
codes, standards and safety regulations.
Reference is specically made here to observe all applicable safety regulations for actuators installed in potentially
explosive (hazardous) locations.
BRAY Series 73 Electric Actuator
Operation and Maintenance Manual
Part nuMbering systeM reference chart
Part nuMber tOrque sPeed, 1/4 turn suPPly suPPly
(In.Lbs) (Seconds) (Volts AC) (Volts DC)
73-010Y-113ZV-536 100 2/5/10 120/240 NA
73-030Y-113ZV-536 300 5/10/15 120/240 12/24
73-060Y-113ZV-536 600 5/10/15/30/60 120/240 12/24
Y - DESIGNATES THE SPEED S
Y = 0 1 2 3 4 5
SEC = 2 5 10 15 30 60
Z - DESIGNATES DRIVE TYPE
Z=
TYPE=
Use this chart as a guide to interpret the S73 electric actuator part number.
D S
DOUBLE D STAR
InTrODuCTIOn
The Bray Series 73 is a quarter turn electric actuator with
manual override for use on any quarter turn valve requiring
up to 600 Lb-In of torque. Operating speeds vary between
2 to 60 seconds. Adjusting two cams sets the open and
close travel limit switches. These cams can be adjusted to
allow rotational travel anywhere from 45° to 300°. Standard
Factory setting allows for 90° reversible rotation.
PrinciPle Of OPeratiOn
The Series 73 actuator is basically divided into two internal
sections; the power center below the switchplate, and the
control center above the switchplate. Below the switchplate the spur geartrain drives an output coupling. The
override mechanism for manual operation is also located
here. Above the switchplate are components requiring
customer adjustment. The indicator shaft assembly, limit
switches, terminal strips, heater, capacitor and motor are
all placed here for easy access. External to the unit are a
highly visible valve position indicator, the unique manual
override shaft and two 1/2” NPT conduit entry ports. The
external nish is a high quality polyester powder coating,
which has exceptional UV as well as chemical resistance.
electrical OPeratiOn
The motor used in the Bray Series 73 is a permanent
induction split capacitor design (single phase AC power).
Travel limit switches are mechanical form C (SPDT) are
rated at 10 amp (0.8 PF), 1/2 HP 125 VAC and 3/4 HP
250 VAC. In situations where the torque capacity of the
unit is exceeded to the point where the motor stalls and
overheats, a thermal protector switch built into the motor
windings will automatically disconnect the motor power.
Once the motor cools sufciently the thermal switch will
V - DESIGNATES VOLTAGE
V=
VOLTAGE
3 4 5 6
12VDC 24VDC 120VAC 220VAC
reset. The motor has a spring loaded brake that activates
when power is removed from the unit. The brake prevents
the spur gears from being back driven.
General Electrical Schematic
(Note: the schematic below is for reference only. The actual wiring
diagram for each specic unit is placed inside the actuator cover).
Mechanical OPeratiOn
Mechanically, the ratio of the gearmotor determines the
speed of the unit. The gearmotor utilizes high efciency
spur gears with various ratios for the actuation speeds.
Positioning is determined by an indicator-camshaft linked
to the output coupling.
Pre-installatiOn stOrage
Units are shipped with two metal conduit entry plugs to
prevent foreign matter from entering the unit.
nOTICe
To prevent condensation from forming inside these units,
maintain a near constant external temperature and supply power to the optional heater internal to the unit.
3
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