rada DRV40 - Common Fault: Outlet Temperature Fluctuations; Diagnosing Fluctuations and Mechanism Checks

60
Stop Valve
Full Bore Isolating Valve
Pressure Reducing Valve
Shower
Thermometer
Cold Water
Hot Water
Mixed Water
Check Valve
Recirculation Pump
Key
Strainer / Filter
Needle Valve
Flow indicator
Safety Valve
Water
Heater
Problem: “Outlet temperature uctuates more than ± 2°C...”
Check internal mechanism
Mechanism is jamming or slow to control.
Clean and descale the following parts:
• Proportioning Assembly
• Gear Drive Assembly
• Magnetic Rotor
Renew separator seal and lubricate internal
mechanism.
Water pressure
Make sure supply pressures are balanced.
Check for the following:
• Air locks
• Blocked strainers
• Closed valves