VOLTMAX ELECTRIC BOILER Installation and Operation Manual
(
Revised March 2019)
, Page
10.
Figure 1 : Possible pipe flow configurations
BOILER PIPING CONNECTION
The boiler is equipped with two fittings on each
side of the unit. One of the bottom connections
must be used for the heating return (inlet) and one
of the top connections must be used for supplying
the heating system (outlet).
The outlet and inlet size are 1½ "NPTM threaded
steel pipes, for the VoltMax with a power of
90kW
and less
and 2½ "NPTM threaded steel pipes for
the VoltMax with a power of
More than 90kW
.
Installation of plugs on the inlet and exhaust ducts
is required to facilitate the disconnection and
maintenance of the boiler.
When connecting different types of pipes
(galvanized steel and copper), use dielectric joints
(insulation) to protect the boiler and piping.
Use only new and clean pipes as piping
connection to the boiler. Local codes or
regulations may dictate the exact type of material
to be used.
Insulate all piping containing hot water, especially
in an unheated environment.
Install faucets for easy maintenance.
Install a thermometer on the inlet and outlet
duct(s).
Close the unused openings on the boiler.
Do not
block the safety valve
, this may cause loss,
damage or injury.
AUXILIARY BOILER PIPING
CONNECTION
When an auxiliary boiler used as back up is
twinned to the VoltMax boiler to act as a back-up
controlled by the VOTLMAX, the auxiliary
boiler shall be installed downstream of the electric
boiler as shown on Figure 5 and 7.
SAFETY VALVE
The installation of a safety valve is an integral part
of the boiler’s installation. The trigger point of the
valve must not exceed the design pressure of the
boiler as indicated on its registration and
identification plate. The valve must comply with the
ASME Boiler and Pressure Vessel Code and limit
the boiler maximum operating pressure. The
safety valve is a security component, not a control
component.
The capacity of the safety valve expressed in BTU
/ hour must equal or exceed the rating on the
nameplate of the boiler (s).
A safety valve adjusted to the maximum design
pressure of the boiler has been installed at the
factory. The latter can be replaced by a valve with
a lower trigger pressure, but its BTU / hour
capacity must not be lower than the maximum
boiler power.
Connect the exhaust of the safety valve to a drain
line. The lower end of this conduit shall be at least
6" (15 cm) from the floor drain away from any
electrical component. The drain line must be
directed downwards from the exhaust of the safety
valve to ensure complete drainage by gravity. The
diameter of the drainpipe must not be less than
that of the exhaust of the valve. The end of the
conduit must not be threaded or hidden and must
