31
5797 340 - 01
Vitoflex 300-RF Installation & Operating
Mechanical
Safety Devices
(continued)
Legend
A
Nipple,
c
in. x 1
b
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 2
b
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
L
Safety heat exchanger connections, NPTM
b
in.
1
M
Sensor well - fixed high limit
N
3 in. or 4 in. Boiler supply flange
2
O
Supply sensor well (sensor supplied)
P
Return sensor well (sensor supplied)
Q
3 in. or 4 in. Boiler return flange
2
R
Sensor well for thermal safety flush valve (R
b
in.)
(sensor
supplied)
1
See section piping and installation of safety devices
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.
B
C
D
F
G
H
J
K
L
M
N
O
P
E
I
A
R
L
Q
The safety equipment for the heating installation must be installed by the heating contractor authorized to do so.