BTH Electric Boilers USE & CARE MANUAL
(Revision June.2014)
, Page
5.
BOILER WATER CONNECTIONS
Make sure you connect the accessories and the piping to the proper connection fittings as indicated at figure
2 above and according to the selected mounting position.
Figure 3 below shows typical connections of a MINI boiler to a radiant floor heating system. The location of
the distribution system components may be different from what is represented.
Figure 3 : Typical piping lay-out
Flow check valve
On heating systems having more than one pump,
each pump will need to be equipped with a flow
check valve either incorporated into the pump or
separate.
Pressure relief valve
This component supplied with the unit must be
installed directly to the boiler housing to the
appropriate connection according to the mounting
position.
Connect the outlet of the relief valve downward to
a safe location in case of discharge.
The piping diameter used for the discharge piping
shall not be smaller than that of the valve outlet. .
No valve of any type, restriction or reducer
coupling should be installed on the discharge line.
Local codes shall govern the installation of relief
valves.
Expansion tank
The expansion tank must be able to store the
required volume of boiler water during maximum
design operating temperature. The maximum
allowable operating pressure is 30PSI (207kPa).
Contact
your
plumbing
supply
house
for
assistance.
Water pressure feeder regulator
When a pressurized water supply is available in
the building, a make-up systems consisting in a
water pressure reducer generally set at 12psi
(83kPa) and equipped with check valve satisfying
local regulations must be installed between the
boiler and the water supply system.
If the boiler is installed in a building that does not
have a water supply and when the local plumbing
codes allows, it is possible to simply manually
pressurized the heating system equipped with an
expansion tank to 10 (7kPa)to 28psi (193kPa) and