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.
F ilter
G as S upply
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H3
V4
V3 
C old W ate r Line
Hot Wa ter Line
H2
H1
Circulating Pump
Maintenace - Scale Flush Procedure
1
Key
3/4" Ball Valve
3/4" Union
Check Valve
Pressure Relief Valve
Pressure Regulator
Circulating Pump
S
Boiler Drain Valve
Solenoid Valve | Mixing Valve |
NOTE: This drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with local building officials before installation. The Contractor or engineer is to determine the necessary components and configuration of the particular system to be in- stalled. It is the responsibility of the engineer or contractor to ensure that the installation is in accordance with all local building codes.
Drawing Date:
September 07, 2008
Drawing Number:
MP-01
38
