American Water Heater ATI-305-P Water Heater User Manual


 
Drawing Number:
Drawing Date:
Pressure Relief Valve
3/4" Ball Valve
3/4" Union
Check Valve
Key
S
Pressure Regulator
Circulating Pump
Solenoid Valve
Boiler Drain Valve
M-1-F
1 Tankless Water Heater
Maintenance - Scale Flush Procedure
June 11, 2007
This is not an engineering drawing; it is intended only as a guide and not
as a replacement for professional engineering project drawings. This
drawing is not intended to describe a complete system. It is up to the
contractor or engineer to determine the necessary components and
configuration of the particular system to be installed. The drawing does
not imply compliance with local building code requirements. It is the
responsibility of the engineer or contractor to ensure that the installation is
in accordance with all local building codes. Confer with local building
officials before installation.
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V1
V3
V2
V4
H1
H2
H3
Circulating Pump
C
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W
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L
in
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H
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W
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In
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F
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Flush Procedure
1. Disconnect electrical power to the water heater.
and V4).
3. Connect pump outlet hose (H1) to the cold water line at service valve V2.
4. Connect drain hose (H3) to service valve V1.
5. Pour approximately 4 gallons of virgin, food grade, white vinegar or citric
acid into pail.
6. Place the drain hose (H3) and the hose (H2) to the pump inlet into the
cleaning solution.
7. Open both service valves (V1 and V2) on the hot water and cold water
lines.
8. Operate the pump and allow the cleaning solution to circulate through
the water heater for at least 45 minutes.
10. Rinse the cleaning solution from the water heater by:
a. remove the free end of the drain hose (H3) from the pail
11. Disconnect all hoses.
13. Restore electrical power to the water heater.
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