rada DRV40, Product Manual, Page: 65 / 72

65
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
Check blend circuit flow rate.
Flow rate is less than 19 l/m. Reset circuit
flow rate and check for the following:
•
Air locks
•
Blocked strainers
•
Closed valves
•
Pump failure
Checkvalves
Check circuit to make sure checkvalves are
correct positioned and operating normally.
(See
Recirculation Circuit - Plumbing
Schematic )
Check mixed return temperature.
Minimum recirculation loop temperature
loss = 1°C
Water pressure
Make sure supply pressures are balanced.
Make sure mixed return is flowing correctly
to hot water supply inlet. Check for the
following:
•
Air locks
•
Blocked strainers
•
Closed valves