Safety
· The group with thermostatic mixing valve must be installed by a qualified technician in accordance with national regulations and/or
local requirements.
· If the group with mixing valve is not installed, commissioned and maintained correctly in accordance with the instructions in this
manual, it may not work properly and may put the user in danger.
· Make sure that all connection fittings are watertight.
· When realising water connections, make sure that the pipework connected to the group with mixing valve is not subjected to excessive mechanical
stress. Over time this may result in breakages, with consequent water leaks which could harm people and/or damage property.
· Water temperatures higher than 50°C may cause severe burns. When installing, commissioning and maintaining the group with thermostatic mixing
valve, take the necessary precautions so that these temperatures will not be hazardous for people.
· In the case of particularly aggressive water, water treatment must be provided upstream of the inlet to the group with thermostatic mixing valve,
according to current specifications. If they are not provided the valve may be damaged and may not work properly.
· The coupling of the kit with mixing valve and the boiler must be made taking in consideration the operational characteristics of both units.
An uncorrect choice could compromise the operation of the boiler and/or system.
Troubleshooting
In normal operating conditions, the unit provides high performance. However, in special circumstances when our maintenance schedule is not
observed, the following problems may arise:
Problem
Hot water supplied to cold
water taps
Mixed water temperature
fluctuations
Incorrect flow rate at the valve
outlet
No flow at the valve outlet
Anti-scald function not
available when the valve is
tested
Cause
a) Check valves at the inlets not operating correctly
and watertightness not guaranteed
a) Incorrect inlet water temperatures
b) Inlet water supply failure
c) Uncorrect commissioning
a) Insufficient water supply
b) Inlet water temperature/pressure fluctuations
c) Adverse conditions due to other water draw off
points in the system
a) In-line strainers obstructed
b) Insufficient supply pressure
c) Dirt obstructing water flow through the valve
a) Installation not compliant with recommendations
b) Minimum temperature difference not reached
e) Inner mechanism obstructed by dirt
Solution
• Replace damaged check valves
• Restore inlet conditions within kit
specification range
• Stabilise supply conditions at the inlet
• Clean strainers
• Restore supply conditions
• Remove dirt/scale from the valve
• Follow installation instructions
• Increase hot water temperature
• Remove dirt/scale from the valve
Leave this manual as a reference guide for the user