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NOTE: The RS-094-MK4 can be installed on existing or new water heater installations.
RDT recommends installation by appropriately licensed and certified installers to ensure that all local
code requirements are met.
INSTALLATION INSTRUCTIONS
1. Turn off the water supply feed line to the water heater. Confirm that the power-vent water heater is
unplugged from the electrical supply.
2. Prior to installation, manually exercise the valve body to fully closed and back to fully open position
by holding it in your hand, applying a pliers to the valve stem and turning. Thread the valve body into
the feed water line after the manual shut-off. Apply pipe sealant or Teflon
and tighten.
3. The receiver connector comes prewired with basic connections to the power supply, sensor
and electrical plug interrupter. Using an appropriate screwdriver, make any additional electrical
connections as may be desired for output contacts or additional sensors per wiring Figure 2.
(Note: additional sensors can be connected to either 6 & 7 or 8 & 9, as wiring space allows.)
Then snap the terminal wiring block into the receiver housing at the mating slot provided.
4. Secure the valve body in one hand and snap the receiver into place on the valve body mounting
pad. (Note: Improper alignment of the valve stem may interfere with proper receiver mounting.
If any resistance is encountered, confirm the witness mark on the valve stem is in alignment with
the valve ports. Use an appropriate hand tool, such as pliers, to clamp down on the valve stem and
turn in the appropriate direction until the desired position is achieved).
5. Route and secure the 18-2 wire from the power-off relay to the location of the 120V AC wall outlet
that supplies the water heater power-vent unit.
6. Plug the power-off relay fully flush into a wall receptacle. Do not plug into an extension cord.
7. Plug the power-vent water heater cord into the power-off relay and activate the power-vent unit.
8. Place the sensor(s) where water is most likely to first accumulate (such as the drain pan or the
floor next to the tank). The sensor is magnetic and can be installed horizontally or vertically in
conjunction with the metal plate – see Figure 3.
• Clean the desired location area to ensure the surface is clean for optimum plate adhesion.
• Peel the backing off the metal plate to reveal the adhesive and stick in place.
• Place the sensor on the plate as close as possible to the floor, allowing the magnets to secure
it in place.
Note: The sensor features a through-hole that can be used to screw it onto a surface if a more
permanent installation is desired or necessary.
9. Plug the RS-094 power transformer into a wall outlet. The green "Power" indicator light on the
receiver will turn on. Open the water supply feed line.
10. Function Test the system as follows:
• Place the sensor on a wet paper towel. The audible alarm will sound and the valve will rotate to
the closed position. The power-off relay will also respond to kill power to the power-vent unit.
• The red "Valve Closed" LED will turn on when the valve is completely closed (approximately
45-second cycle time). Open a hot water faucet and confirm that there is no water flow. Confirm
deactivation of the power-vent water heater.
• Remove the sensor from the paper towel, dry the contact points, and place it back in the desired
location on the metal plate.
• Press and release the "Reset" button on the receiver to open the valve and begin the flow of
water again (approximately 45 seconds to fully re-open). The green "Power" indicator light will
flash once to indicate the reset process has begun. Confirm reactivation of the power-vent unit.
Open a hot water faucet and inspect for water flow.
tape to the NPT threads
®
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