Bray 70 Series Operation And Maintenance Manual

BRAY Series 70 Electric Actuator
Operation and Maintenance Manual
9
heater
To prevent condensation from forming inside the actuator,
Bray offers an optional heater. The heater is a PTC
(Positive Temperature Coefcient) style which has a unique
temperature - resistance characteristic. The heater self-
regulates by increasing its electrical resistance relative
to its temperature. The heater does not require external
thermostats or switches to control its heat output. It is
constructed of a polycrystalline ceramic, sandwiched
between two conductors, and wrapped inside a thermally
conductive electrical insulator.
Connect the heater wires to the terminal strip as indicated
on the wiring diagram.
NOTE: The heater must have a constant power supply to
be effective.
WARNING
The heater surface can reach temperatures in excess of
200 degrees Celsius
heater Kit cOnSiStS Of:
1. Heater with ying leads
2. Heater Mounting Bracket
3. #10 pan head screw, phillips drive
tOOlS required:
• For terminal wiring: Screwdriver,
3
/
16
” tip at blade
• For heater mounting screw: Screwdriver, No.1 phillips
inStallatiOn PrOcedure:
The heater is mounted through a hole provided in the
switchplate.
Before servicing unit, switch all power off at the service
panel and lock the service disconnecting means to prevent
power from being switched on accidentally. When the service
disconnecting means cannot be locked, securely fasten a
prominent warning device, such as a tag, to the service panel.
Disconnect all power to the unit.
1. Place the heater snugly into its mounting bracket until
approx. 1/2 to 1” is left above the bracket as shown
in diagram.
2. Slip the heater into its mounting hole.
3. Align the fastening hole in the bracket with the
threaded screw hole in the plate. Fasten the heater to
the switchplate.
4. Connect the heater wires to the terminal strip as
indicated on the wiring diagram.
SerVO-PrO MOdule
Servo kits can be eld installed on any continuous duty actua-
tor (30 or 60 sec. operation speed) to provide proportional
positioning in response to a control signal. Intermittent duty
actuators are not adaptable for servo control.
SerVO Kit cOnSiStS Of:
1. One servo module
2. Four #6 cross drive pan head screw (two for servo,
two for feedback potentiometer)
3. One potentiometer assembly
4. Two #6 type A internal lockwashers (for pot)
5. One wiring diagram sticker for attaching to inside of
actuator’s cover
6. One wiring diagram sticker for servo units with torque
switches
tOOlS required:
• For actuator terminals wiring Screwdriver,
3
/
16
”
atblade
• For servo terminals Screwdriver, No.1 phillips
• For servo and pot mounting screws Screwdriver,
No.2 phillips
!

Bray 70 Series Specifications

General

Brand	Bray
Model	70 Series
Category	Controller
Language	English