The purpose of this booklet is to provide
assembly, installation and operation information
concerning PowerMaster Model GT Drawbar
Commercial Vehicular Garage Door Operators
and related Accessory Products.
NOTE: IT IS IMPORTANT THAT THIS
INSTRUCTION MANUAL BE READ AND
UNDERSTOOD COMPLETELY BEFORE
INSTALLATION OR OPERATION IS
ATTEMPTED. IT IS INTENDED THAT THE
INSTALLATION OF THIS UNIT WILL BE DONE
ONLY BY PERSONS TRAINED AND
QUALIFIED IN THE INSTALLATION,
ADJUSTMENT AND SERVICE OF
COMMERCIAL OVERHEAD DOORS AND
DOOR OPERATORS AND BY QUALIFIED
ELECTRICIANS.
NOTE:THE IMPORTANT SAFEGUARDS AND
INSTRUCTIONS IN THIS MANUAL CANNOT
COVER ALL POSSIBLE CONDITIONS AND
SITUATIONS WHICH MAY OCCUR DURING
ITS USE. IT MUST BE UNDERSTOOD THAT
COMMON SENSE AND CAUTION MUST BE
EXERCISED BY THE PERSON(S) INSTAL-
LING, MAINTAINING AND OPERATING THE
EQUIPMENT DESCRIBED HEREIN. DO NOT
USE THIS EQUIPMENT FOR ANY OTHER
THAN ITS INTENDED
PURPOSE - OPERATING OVERHEAD
COMMERCIAL VEHICULAR GARAGE
DOORS.
STANDARD FEATURES:
Limit Switches: Rotary limit switches, easily
adjusted over a wide range. The motor may be
removed without affecting the limit switch
adjustments.
Manual Release: Permits manual operation
of the door in the event of a power failure.
The Model T is equipped with a door arm
disconnect to aid in manual operation. Use
of this feature will not affect the limit switch
adjustment.
Control Circuit: Standard three button open,
close and stop. 24 Volts AC.
Connections For Auxiliary Entrapment
Protection Devices: Use with pneumatic
reversing door edge components or a
photoelectric beam (across the opening) device.
Constant Contact To Close: Standard
operation.
Momentary Contact To Close: Feature can be
activated by simply moving a wire on the
terminal strip.
OPTIONAL FEATURES:
Digital Radio Controls: Open, Close and
Stop operation. Radio units are available to
control up to 27 doors from one transmitter
Digital Timer to Close: Adjustable from 0 to
17 minutes in one second intervals.
Keyless Entry System: Connection terminals
provided for hard wired or wireless keyless
entry systems.
PRODUCT FEATURES 3
Model GT Drawbar Operator Applications
Drawbar operators are intended for
commercial and industrial use on sectional
overhead doors which use horizontal track
with normal radius. A drawbar operator is not
suitable for doors with high lift or vertical lift
doors. The installation requires a minimum
clearance of 8 inches above the highest point
of the door at any point in its travel. Please
refer to Figure 10, on page 10 for back room
requirements.
A drawbar operator when properly installed
will effectively lock the door in the closed
position.
Model GT Drawbar operators are used in
the following applications:
- Heavy Duty, Indoor Commercial
installations only
- Up to 20 foot high doors with a maximum
area of 575 square feet maximum area -
slightly higher for lighter doors - consult
factory.
- Use with foam/pneumatic reversing door
edge or photoelectric device - REQUIRED
where the 3-button station is out of sight of
the door, or any other automatic, remote or
manual control is used to activate the door.
