4387-01 NuCalgon Tankless Water Heater Descaler Kit - Vital-Flo

Directions:

This product must be used in accordance to the following directions by HVACR professionals only.

If available, refer to the manufacturer’s guidelines for equipment prep prior to descaling the water heater. Disconnect power to the tankless water heater.

1. Turn gas shut-off valve to ‘off’ position.
2. Close the hot and cold water isolation valves.
3. Ensure hot and cold service valves are closed and remove caps.
4. Fill container with two gallons of water and place under water heater. Remove plug from lid.
5. Connect first hose to the pump and pass the other end through hole in lid; connect to cold drain valve. Place Vital Flo submersible pump into container.
6. Connect second hose to hot drain valve and pass other end through hole in lid so that it will drain into container properly.
7. Pour entire contents (8 fluid ounces) of Vital Flo Descaler into container and snap on lid.
8. Open both the cold and hot service valves.
9. Plug the pump into a grounded receptacle. Circulate solution through the heater for 20-45 minutes. Unplug pump.
10. Close cold service valve. Remove hose from cold water service valve and replace cap. Leave other hose connected to hot water service valve.
11. Remove pump from container and disconnect hose. Discard solution. Always purge pump with fresh water after use.
12. Flush tankless water heater for 5 minutes by opening the cold water isolation valve and allow water to flow out the hot water service valve to drain or into the container. If container is used, it must be emptied several times.
13. Close hot service valve, remove hose and replace service cap. Open hot water isolation valve.
14. Connect power to water heater, open gas valve and return device to service.