Technical data

8
5 Water System Installation
Customers must ensure that there is a supply of water in-
dependent of the electricity supply. This (redundant) de-
sign ensures that in case of a power failure, the boiler will
be reliably cooled by the thermal run-off safety valve.
5.1 Safety Equipment
The safety equipment for the heating installation must be
carried out by the heating contractor authorised to do so.
See Spec Sheet 5960 as an example.
Installing safety devices on the boiler
Installing safety devices.
1. Install pressure relief valve, discharge pipe, air vent and
pressure gage as described in the Installation
Instructions of safety header.
A 30 or 60 psig pressure relief valve is shipped with the
boiler (standard equipment).
2. Install discharge pipe on pressure relief valve. The end
of the pipe must not be threaded.
The pressure relief discharge pipe should extend to a
floor drain and end approximately 6”/150 mm above the
drain.
Do not install shut-off valve in discharge pipe.
Do not reduce discharge pipe diameter.
Do not pipe discharge to outdoors!
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.
This boiler does not require a flow switch.
Low water cut-off
A low water cut-off may be required by local codes.
If boiler is installed above radiation level, a low water cut-
off device of approved type must be installed in all
instances. Do not install an isolation valve between boiler
and low water cut-off.
5.2 Expansion
With closed expansion, the supply pressure to the expan-
sion tank should be equal to the max. amount of the sys-
tem pressure plus (0.2 bar) 3 psig.
5.3 The boiler circuit with return circuit 3-
way valve
To reliably prevent boiler corrosion through condensation of
the flue gases, the boiler return flow temperature must in
no case be below 65°C 149°F.
The PYROT rotary combustion chamber boiler is infinitely
variably output-controlled. For that, it is necessary there to
be a constant flow through the boiler of the water to be
heated. The boiler circuit the boiler pump and boiler mixer
must therefore be installed according to Spec Sheet 6960.
The design of the boiler circuit should be carried out such
that the temperature difference between the boiler supply
and the Boiler return temperature is equal to or less than
(15°C) 27°F.
The activation of the boiler pump and boiler control valve is
integrated in the custom control panel that comes with the
boiler.
5.4 The extinguishing water tank
A self-activating extinguishing device must always be in-
stalled next to boiler feed system. With regard to the as-
sembly, refer to the spec sheets in the annex
The functioning is carried out by means of an extinguishing
valve and is not dependent on electric current. A float-
type switch monitors the water level and should be electri-
cally connected (see connection diagram)
IMPORTANT
IMPORTANT