Caleffi 6000 User Manual
Page 43
18
Installation
Before installing the Caleffi mixing valve, the pipes must be flushed to prevent impurities in the water from affecting performance.
We recommend always installing strainers of sufficient capacity at the inlet from the water main.
Caleffi electronic mixing valves must be installed as shown on the installation diagrams in this manual, taking account of the applicable current
regulations.
Caleffi electronic mixing valve may be installed
either vertically or horizontally, but the actuator must
not be upside down.
The following are indicated on the body of the mixing valve:
-Hot water inlet with red arrow
-Cold water inlet with blue arrow
Check valves
In systems with mixing valves, check valves should be fitted to prevent undesired backflows, as shown in the diagrams.
Commissioning
Due to the special purposes for which the electronic mixing valve will be used, it must be commissioned in accordance with current regulations
and by qualified personnel using suitable measuring instruments. Check that the hot and cold water supply pressures are within the operating
limits of the mixing valve. Check the temperature of the hot water from the storage, T
≥ 60°C.
In the installation log book, record all the parameter settings made and the measurements taken.
Thermal disinfection
The temperatures and corresponding disinfection times for the water system must be chosen according to the type of system and purpose for
which it will be used. Considering the related most advanced legislation, we can take the following criteria as an approximate guide:
T = 70°C for 10 minutes
T = 65°C for 15 minutes
T = 60°C for 30 minutes
Thermal disinfection is usually performed at times when the system is used least, for example at night; this is to minimize the risk of scalding
for users. We recommend carrying out a thermal disinfection every day and at least once a week.
To ensure that thermal disinfection is actually performed at the desired temperature and for the specified time, please refer to the
sections on regulator functions and management of the special programs.
Guide table for thermal disinfection programs
∞C
0
20
80
60
40
∞
C
0
20
80
60
40
∞C
0
20
80
60
40
Type of check
Progr.
Use of return
probe
Adjustment
temperature
Disinfection temperature
Adjustment and simple disinfection without
check
0
NO
Flow 50–55°C
Flow: 60°C
Adjustment and disinfection check on flow
temperature
1A
NO
Flow 50–55°C
Flow: 60°C
Adjustment and disinfection check on return
temperature to the central heating system
1B
YES
Flow 50–55°C
Return: 57°C
Continuous disinfection
0 - 1A
1B - 2
Reading only
Flow 55°C - 24 h
See T adjustment
Adjustment and disinfection check with flow
temperature change according to return
temperature
2
YES
Flow 50–55°C
Return: 55°C with adjustment of flow
up to maximum value