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Indoor Unit Installation
Safety Valve
Legend
A Supply from Outdoor Unit
B 1-a X 1 X 1 Inch Brass Reducing Tee
C 1 X 6 Inch Long Brass Nipple
D 1 X c Inch Brass Reducing Elbow
E c Inch Brass Close Nipple
F 30 PSI Pressure Relief Valve
20
Vitocal 100-AW AM2V Installation, Service and Operating
F
E
D
A
C
B
Installing the pressure relief valve:
1. Use the supplied fittings to install the pressure
relief valve on the Supply from Outdoor Unit
Connection of the Indoor Unit refer to "Piping
Connections" on page 18.
Minimum connection diameters:
Pressure relief valve ..................................... c in.
Discharge pipe ............................................ c in.
Maximum operating pressure: 30 PSI (2 bar)
Minimum operating pressure: 8 PSI (0.5 bar)
Installing the discharge pipe:
1. 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.
1
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 heat pump can be purged of all air,
ensure supply/return water lines do not contain
restrictive piping where air could be trapped.
1
WARNING
Do not install an isolation valve between heat
pump 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.
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