8
- Installation & Servicing
GENERAL
For the correct operation of the boiler, the use of a mixing
header is advisable because it provides:
- separation and collection of circuit dirt
- good air venting
- separation of the two hydraulic circulation circuits
2
MIXING HEADER
D
BFBR
a
b
c
g
g
h
HF
e
FLOW
RETURN
FLOW
RETURN
1
/
2
"
1
/
2
"
F
I
L
T
E
R
HR
SECONDARY
HEATING
CIRCUIT
PRIMARY
BOILER
CIRCUIT
ima 5790
The use of a mixing header means that compensating controls
can be used to operate mixing valves on a variable temperature
circuit, without affecting the water flow rate through the boiler.
Model D BF BR HF HR a b c e h g
mm DN DN mm mm mm mm mm mm
80 kW 100 50 50 200 300 1,000 150 1,650 200
120 kW 150 65 65 200 300 1,000 150 1,650 200
160 kW 200 80 80 200 300 1,000 150 1,650 200
200-240-280 kW 200 100 100 200 300 1,000 150 1,650 200
Use the Table below as a guide for sizing a suitable mixing header.