Installation manual

Following installation of the Twin Flow the following must be done to commission the

system. This is to include the commissioning of the Twin Flow system only.

Commissioning procedures for the water heater and boiler

are found in the Installation Instructions with each

appliance.

1. After installation of the Twin Flow all pipework, valves, and radiators must be

flushed out.

2. Connect the Twin Flow to the building pipe work.

3. Check all connections for tightness.

4. Check Expansion Vessel pre-charge pressure, according to Manufacturer’s

specification. Pressure point is on top of the vessel, accessible at the top or bottom

of the backplate depending on left or right hand orientation. Instructions are included

with the expansion vessel.

5. Manually operate the boiler relief valve. Ensure that water is discharged from the

valves and runs freely down the discharge pipes. Ensure that the valves properly re-

seat.

6. Switch on boiler and follow commissioning procedure in the manual supplied with

the boiler.

7. Switch on water heater and follow commissioning procedure in the manual

supplied with the water heater.

8. Check strainer and all filters for blockages.

9. Explain to the customer how to operate the system, and that the system must be

maintained annually.

IT IS THE INSTALLER’S RESPONSIBILITY TO

ENSURE THE SYSTEM IS LEFT SAFE

COMMISSIONING PROCEDURE