Watts LFWDS - Manual (Page 2)

Installation Instructions:
a. Turn off all electrical power to the water heater.
b. Turn off the water supply to the water heater.
c. Drain water from the water heater so that the cold water supply piping is free of water.
d. Close the drain valve after draining water.
1. Install the Control Unit on the cold water supply piping with the arrow on the valve pointing in the direction of flow, towards the
water heater. Figure 1
CAUTION: Do not apply heat directly to the valve body!
Pre-solder the adapter fittings that will be used to connect piping to the valve. Use caution when soldering to avoid damage
to the valve cover and internal components.
2. After soldering the piping to the fittings, apply thread sealant to the adapter fittings and thread the adapters with attached piping
into the valve body. Figure 2
3. Install and solder the piping to the supply and to the inlet of the water heater.
4. Optional Quick Connect Adapters, follow instructions included with adapters.
5. Install the Water Detector Pad under the water heater with the green circuit board down. The Detector Pad must lie flat on the floor
or in a drain pan. Route the connecting cable to the Control Unit and insert the interlocking connector to the circuit board. Figure 3
Note: It is not necessary to remove the cover of the Control Unit to install the interconnecting cables. To remove an interlocking cable,
use the supplied Pocket Screwdriver to depress the tab on the cable while pulling cable from its socket. Figure 4
Important: Interconnecting wires must not touch or be in close proximity to any flame or hot surface.
a. If no drain pan exists, install the Water Dam around the perimeter of the water heater. The Water Dam can be cut so that it fits
approximately 1 to 2 inches outside the diameter of the water heater and includes the area where the Temperature and Pressure
safety relief drain tube terminates.
b. Install the plastic connector supplied with the Water Dam into both ends of the Water Dam so that no gap exists between the
ends. Figure 5 and Figure 5a
6. Install the Power Cutout Module, Figure 6, to the water heater as indicated below.
Power Vent Water Heater Installation
WARNING: The WDS-PV system should only be used with UL Listed Power Vented Water Heaters.
NOTE: Unplug the Water Heater Power Vent cord from the existing house wiring receptacle and plug it back into the WDS-PV Relay
receptacle marked "Power Vent Cord". Plug the Power Cutout Module line cord into the house wiring receptacle that the Water
Heater Power Vent cord was just removed from.
1. Mount the Power Cutout Module as close to the water heater as possible.
2. Remove the green circuit board terminal strip from the Control Unit by pulling straight out on the terminal strip. Figure 7
Figure 1 Figure 2 Figure 3
Figure 4 Figure 5 Figure 5a Figure 6