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Vitoflex 300-RF Installation & Operating
Safety Devices
The safety equipment for the heating installation must be installed by the heating contractor authorized to do so.
Legend
A Nipple, c in. x 1b in.
B Reducing coupling, c in. x b in.
C Boiler water temperature gauge
D Bushing c in. x a in.
E Nipple a in. x 2b in.
F Ball valve a in.
G Pressure gauge
H Reducing coupling
I Reducing bushing
J Nipple
K Pressure relief valve, 30 psi or 60 psi
C
B
A
R
See section piping and installation of safety devices
1
2
3 in. boiler flange for Vitoflex 300-RF 150-300, 4 in. boiler flange for Vitoflex 300-RF 400-540
Note: All fittings shown and sensors indicated are factory
supplied. The size and quantity are matched to the
specific boiler model.
(continued)
K
G
J
I
F
H
E
D
P
Q
L Safety heat exchanger connections, NPTM b in.
M Sensor well - fixed high limit
N 3 in. or 4 in. Boiler supply flange
O Supply sensor well (sensor supplied)
P Return sensor well (sensor supplied)
Q 3 in. or 4 in. Boiler return flange
R Sensor well for thermal safety flush valve (Rb in.)
(sensor supplied)
M
L
L
Mechanical
1
2
2
N
O
31
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