Instructions for Model P294-2K & P294-3K
Please Note: During installation it would be advantageous to have handy:
• Garage door opener manual
• Volt meter
• Spare, short wire
• Flathead screw driver
The Heddolf Keystone Model P294-K universal receiver was designed to have several
selectable options not found on other radio controls. By properly selecting these options
with the convenient slide switches and wiring harness, the Model P294-K eliminates the
requirement to stock several receivers.
1. The Model P294-K will operate on either 12 or 24 volt AC or DC by selecting
either 24V or 12V with the voltage selection switch.
2. The Model P294-K will generate either a 0.5 second pulsed, or a continuous relay
output depending on the setting of the output slide switch. To energize the output
relay as long as the transmitter is activated, select the CONT position. To energize
the output relay for 0.5 seconds regardless of how long the transmitter is
activated, select the PULSED position. Many gate operators and some garage
door operators will not work properly when the switch is in the CONT position.
Wiring Instructions
Green Wire:
Antenna – does not attach to anything
Red Wire: +V power supply wire (when DC power is used, when AC it is a standard
power wire and does not have an order)
Black Wire: -V power supply wire (when DC power is used, when AC it is a standard
power wire and does not have an order)
Yellow Wire: Common wire
White Wire: Normally open
Orange Wire: Normally closed – used in commercial applications – not applicable in
most residential garage door opener situations
1. Identify your system as 12v or 24v system. Can usually be found in the
instruction manual or by calling the operators manufacturer. Set the first switch
accordingly.
2. Most operators only function properly in pulsed. Set the second switch to
PULSED unless the operator’s manual specifies different. This sends a brief
