Vitodens 200-W B2HB 19 to 35, 68 to 125 Installation
29
5461 884 - 14
Safety Connections
Boiler Connections
Installing boiler safety devices
1. Remove the pressure relief valve, drain valve and
fittings from the box.
2. Apply sufficient amount of pipe sealant to both ends
of all pipe fittings
B
,
D
,
F
and
H
and install onto
tees
A
, and
E
.
3. Install pressure relief valve
G
and Isolation valve
C
and
tighten them.
4. Install discharge pipe on pressure relief valve in such
a way that...
- the end of the pipe is not threaded.
- the pressure relief discharge pipe extends to a floor
drain and ends approximately 6 in. (150 mm) above
the drain.
Ensure
that...
- there is no shutoff valve installed in the discharge pipe.
- discharge pipe diameter is not reduced.
- discharge is not piped to outdoors.
Minimum connection diameters:
Pressure relief valve.........................¾ in.
Discharge pipe................................¾ in.
Piping to precharged expansion tank..(field supplied)
IMPORTANT
Install the (approved) factory supplied pressure relief valve.
Removal of air from the system must occur via use of air
vent(s) in the system supply. To ensure the boiler can be
purged of all air, ensure supply/return water lines do not
contain restrictive piping where air could be trapped.
WARNING
Do not install an isolation valve between boiler and
pressure relief valve. The discharge pipe for the pressure
relief valve must be oriented to prevent scalding of
attendants. Pipe pressure relief valve discharge pipe close
to floor drain. Never pipe discharge pipe to the outdoors.
Legend
A
Tee, ¾ in.
B
Nipple, length 1½ in. x ¾ in. (field supplied)
C
Isolation valve, ¾ in. (field supplied)
D
Nipple, length 3½ in. x ¾ in.
E
Tee ¾ in.
F
Nipple, length 1½ in. x ¾ in.
G
Pressure relief valve, ¾ in. NPT
H
Drain valve connection, ¾ in.
Low water cut-off
A low water cut-off device may be required by local codes.
If required, a low water cut-off device of an approved type
(field supplied), is to be installed as per the manufacturers
instructions. DO NOT install an isolation valve between the
boiler and the low water cut-off device.
