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Idiomas disponibles
Idiomas disponibles
HOT OUTLET
COLD INLET
DRAIN
DRAIN
VALVE
VALVE
HANDLE
HANDLE
B
HOT VALVE
MAIN
WATER
COLD VALVE
VALVE
HANDLE
HOT OUTLET
COLD INLET
DRAIN
VALVE
HANDLE
B
HOT VALVE
MAIN
WATER
VALVE
HANDLE
COLD VALVE
CLEANING
Flush unit after cleaning
to prevent cleaning
solution from entering
IMPORTANT: Check with the manufacturer of your heating appliance for specific
hot water system piping.
guidelines and maintenance requirements for the unit installed.
IMPORTANT: For heating appliances with integrated drains, refer to appliance owner's
MAIN WATER
manual for service procedures.
VALVE HANDLE
A
CLEANING AND FLUSHING
Pump, hoses, pail, and cleaning solution not included.
1. Power down the unit, then close the fuel source isolation valve.
2. Close the Cold
3. Ensure the Cold
4. Connect the pump outlet hose to the Cold
5. Connect a drain hose to the Hot
6. Pour 3 to 5 gallons of flushing/de-scaling solution into a pail (virgin food grade
7. Place the pump/pump inlet hose and Hot
8. Open Cold
9. Turn on the pump. Allow the solution to circulate for 20 to 45 minutes,
10. Turn off the pump. Close the Cold
11. Remove the hose from the Cold
12. Remove the pump and hose from the pail.
Flushing - This procedure will flush the appliance with fresh cold water.
13. Put the Hot
14. Close the Cold
15. Close the Hot
FLUSHING
For flushing, hot main
water valve should remain
16. Open the Cold
closed to prevent cleaning
solution from entering
17. Ensure that both the Cold
hot water system piping.
18. Open fuel source isolation valve, then restore power to the tankless water heater.
TESTING
For diagnostic testing
with potable water,
DIAGNOSTIC TESTING
hot main water valve
can remain open.
E-X-P
A
at the unit, eliminating the need for another individual to actuate a remote hot water
fixture. Flow rate, firing rate, and temperature tests can all be performed; consult
appliance owner's manual for complete information on testing your particular model.
1. Ensure the Hot
2. Connect a hose to the Hot
3. When testing is complete, close the Hot
A
and Hot
B
A
and Hot
B
perpendicular to the drain spout). Slowly remove the drain caps. Retain washer.
white vinegar or citric acid recommended - see appliance owner's manual for
specific recommendations for your unit).
and Hot
drain valves.
A
B
depending on the amount of scale in the appliance.
Replace cap & washer securely onto the drain valve outlet.
Dispose of the cleansing solution safely and properly.
B
drain hose end back into the empty pail or place in drain.
Open the Cold
A
main water valve. Flush with at least 20 gallons.
You will have to empty the pail several times.
A
main water valve and clean unit in-line filter, if required.
drain valve, remove the drain hose.
B
Replace cap and washer securely onto the drain valve outlet.
and Hot
main water valves.
A
B
A
& Hot
Restart the unit per the power up guidelines of the manufacturer.
Series service valves allow for full diagnostic testing of the heating appliance
™
drain valve handle is closed (perpendicular to the drain spout).
B
Slowly remove the drain cap. Retain washer.
B
drain valve and run into a pail, sink, or drain opening
and begin testing the system.
Replace cap and washer securely onto the drain valve outlet.
WARNING: Cancer and Reproductive
Harm - www.P65Warnings.ca.gov
SERVICING
INSTRUCTIONS
main water valves.
drain valve handles are closed (handles
drain.
A
drain.
B
B
drain outlet hose into the pail.
A
drain valve.
A
drain.
B
drain valve handles are CLOSED.
B
drain valve and remove the drain hose.
P: (800) 225-9529
F: (800) 336-5133
www.webstonevalves.com
webstone@nibco.com
©2019 NIBCO INC.,
All Rights Reserved.
HOT OUTLET
COLD
DRAIN
VALVE
HANDLE
B
HOT VALVE
MAIN
WATER
VALVE
HANDLE
HOT OUTLET
COL
DRAIN
VALVE
HANDLE
B
HOT VALVE
FORM#EXPI0619
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