Procedure For Flushing The Plate Heat Exchanger - Pavilion PV199DV Installation Manual

19.2 Procedure for Flushing the Plate Heat Exchanger

NOTE This procedure is only intended for use by a qualified service professional or authorized Service
Representative. Any unauthorized use of this procedure may result in voiding the Pavilion Limited
Warranty. Contact Pavilion Customer Center at 1-855-443-8468 for additional support.
To prevent damage to the Plate Heat Exchanger from Scale Build-up, the Plate Heat Exchanger needs to be
flushed* to remove the Scale Build-up.
Damage to the Combi Boiler due to Scale Build-up is not covered by the Combi Boiler's warranty.
* Connect the blue connector marked "FLUSH" for flushing near the Circuit Board when flushing the Plate Heat Exchanger.
NOTE The Combi Boiler must remain connected to the electrical power when flushing the Plate Heat
Exchanger.
The preparation of the flushing system
1. Close the gas supply valve.
2. Close the Domestic Water Inlet valve (V1) and the Domestic Water Outlet valve (V2).
3. Connect the one drain hose (H1) to the drain valve (V3), and then the other to the circulating pump.
4. Connect the drain hose (H2) to the circulating pump.
5. Connect the drain hose (H3) to the drain valve (V4).
6. Pour 1 gallon of "Calcium, Lime and Rust Removal Product" and 1 gallon water into the bucket.
It is recommended "Calcium, Lime and Rust Removal Product" for flushing.
7. Place the both drain hoses (H2 and H3) into the bucket filled with the flushing solution.
8. Open the both drain valves (V3 and V4).
Continue to connect
If a submersible pump is used,
then only 2 hoses will be
needed (H1 and H3).
Flushing
Solution
Bucket
** Service Valve Kit with Pressure Relief Valve may be purchased as an accessory
from an authorized manufacturer's wholesaler.
This allows for full diagnostic testing and easy flushing of the system.
Contact Pavilion Customer Center for more information. (1-855-443-8468)
Combi Boiler
V4
H3
V2
Circulating
Pump
H1
H2
Domestic
Water
Outlet
Service Valve Kit with Pressure Relief
Valve** is necessary for flushing
the Plate Heat Exchanger.
V4
V2
Domestic Water Outlet
V3
V1
Gas Supply
Gas Domestic
Supply Water
Inlet
V3
V1
Domestic Water Inlet
Valve
Maintenance
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