Ariston A/27 MFFI Mffi Commissioning, Water Circuit Diagram, Initial Preparation, Gas Supply

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2.12Water Circuit Diagram

A/23 MFFI

3 COMMISSIONING

3.1Initial Preparation

- A/27 MFFI

Legend

 

1.

Air Pressure Switch

 

2.

Fan

 

3.

Main Heat Exchanger

 

4.

Main Burner

 

5.

Ignition Electrodes

 

 

Detection Electrode

 

6.

Gas Valve

 

7.

Overheat Thermostat

 

8.

Main Circuit Temperature Probe

 

9.

Diverter Valve

 

10.

Main Circuit Flow Switch including

 

 

Safety Pressure Switch for

 

 

Primary Circuit

 

11.

Automatic By-pass

 

12.

Microswitch for Diverter Valve

 

13.

Secondary Heat Exchanger

 

14.

Domestic Water Inlet Filter

 

15.

Boiler Drain Valve

 

16.

Safety Valve

 

17.

Water Pressure Gauge

 

18.

Circulation Pump with Automatic

 

 

Air Release Valve

 

19.

Expansion Vessel

Preliminary electrical system checks to ensure electrical safety must be carried out by a competent person i.e. polarity, earth continuity, resistance to earth and short circuit.

Filling the Heating System:

Remove the panels of the case and lower the control panel (see point 3.2. for further information).

Open the central heating flow and return cocks supplied with the connection kit.

Unscrew the cap on the automatic air release valve one full turn and leave open permanently.

Close all air release valves on the central heating system.

Gradually open valve(s) at the filling point (filling-loop) connection to the central heating system until water is heard to flow, do not open fully.

Open each air release tap starting with the lower point and close it only when clear water, free of air, is visible.

Purge the air from the pump by unscrewing anticlockwise the pump plug and also manually rotate the pump shaft in the direction indicated by the pump label to ensure the pump is free.

Close the pump plug.

Continue filling the system until at least 1 bar registers on the pressure gauge.

Inspect the system for water soundness and remedy any leaks discovered.

Filling of the D.H.W. System: Close all hot water draw-off taps.

Open the cold water inlet cock supplied with the connection kit.

Open slowly each draw-off tap and close it only when clear water, free of bubbles, is visible

Gas Supply:

Inspect the entire installation including the gas meter, test for soundness and purge, all as described in BS 6891:1988.

Open the gas cock (supplied with the connection kit) to the appliance and check the gas connector on the appliance for leaks.

When the installation and filling are completed turn on the central heating

B023

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Contents Mffi A/27 Mffi Table of Contents General Instructions General InformationMffi Technical InformationOverall View Mffi A/27 MffiReference Standards Siting the Appliance InstallationClearances Overall DimensionsGas Connection Mounting the ApplianceElectrical Connection Water Connections Safety Valve DischargePipe Work By-passFilling Flue ConnectionsMains Water Feed Central Heating Terminal Position B023 Coaxial System Room Thermostat Connection Colours Electrical DiagramB023 Mffi Commissioning Water Circuit DiagramInitial Preparation Filling the Heating SystemSelector Knob for Summer/Winter/Flue Analysis Modes Removing the Front PanelControl Panel Checks to be run before initial start-up are as follows Initial Start-up Operational AdjustmentsOverheating Ignition FailureCirculation Failure Safety Shut-off GAS AdjustmentsDraining the System Limescale Build-upChanging the Type of Gas MaintenanceMiscellaneous Wiring Diagram for Two Heating ZonesBlue Wiring Diagram for Connection to Ariston Unvented CylinderB023 B023 B023 Manufacturer Merloni TermoSanitari SpA Italy Cod 99 84 1260 112 B023