10
Operating Principles
The dispense valve assembly delivers precision temperature water at selected temperatures.
When hot water is drawn from the faucet, the fill valve pulses on and off every few seconds to replenish the tank.
By controlling the flow of incoming water, the amount of cold water entering the tank is synchronized with the rate
at which the water can be heated. This ensures an uninterrupted supply of hot water.
When dispensing water at a rate that exceeds the unit’s capacity to heat, the screen will show that the
temperature is not available.
If hot water tank supply is depleted during high use, faucet will temporary “lockout” to allow the hot water tank to
reheat for an adequate hot water supply. The “HEATING” screen will display at this time.
Cleaning & Maintenance
Daily:
2. Check the drip tray and empty if necessary.
Quarterly:
3. Inspect all fittings and hoses for leaks.
4. Inspect inside of tank for lime deposits. De-lime tank and probes if necessary. This procedure
should be performed by a qualified service technician
Notice:
5. Turn off power to the HWD-2102 before any cleaning procedure, including wiping the exterior for
appearance reasons. Dry the exterior, especially the face panel, before turning on power.
WARNING:
6. Do not apply any type of spray cleaner on the face panel of this equipment.
7. Never use any solvent based cleaner or polish on this equipment.
8. Dry the face of the HWD-2102 before turning on power.
9. WARNING-Do not plug-in this equipment or attempt to operate without all covers in place and all screws fastened.
Tank Drain
The water tank must be drained before maintenance procedures, and when the unit is to be relocated or shipped.
1. Disconnect power to the unit.
2. Move the unit near a sink or obtain a container to large enough to hold the four gallons of water from the tank.
3. Remove the tank cover and allow the tank to cool to a safe temperature.
4. The tank drain is located on the back of the unit. Turn the drain plug one-quarter turn in either direction.
5. Pull the plug out far enough to expose the silicone tube.
6. Using pliers loosen the hose clamp and move it back over the tube.
7. Crimp the tube an inch or two away from the drain plug to prevent water from flowing.
8. Use the other hand to pull the drain plug out of the tube.
9. Release the crimped tube and allow the water to flow into the sink or container.
