Electric boilers MINI BTH
Installation & Operating Manual (Revision: May 2015),
12
Section 4: START UP OPERATION
Before operating this boiler, be sure to read and follow these instructions, as well as the warnings printed
in this manual. Failure to do so can result in unsafe operation of the boiler resulting in property damage
or bodily injury. Should you have any problems reading, following or difficulty in understanding the
instructions in this manual, STOP, and get help from a qualified person.
Do not turn on the boiler unless it is filled with water. Do not turn on the boiler if the cold wa ter supply
shut-off valve is closed.
4.1 PREPARATORY STEP
Make sure that all the piping and electrical
connections have been made.
Fill the boiler and the heating system with
water.
Check for leaks.
Check
the
pressure
reading
at
the
temperature and pressure indicator. It
should be around 12 psi.
Adjust the temperature control(s) to OFF.
Turn the service switch in front of the unit to
ON
Adjust the house thermostat to generate a
heat demand. The pump shall start.
Check that the water is circulating in the
distribution system and that all the air is
expelled.
4.2 TEMPERATURE CONTROL
ADJUSTMENT
Each temperature control has the function to control
one heating element.
Adjust each control to the desired temperature by
turning the knob of the control. The reference mark
for the adjustment is a red dot located under the
knob.
One control (any of the two) should be set at
the maximum temperature required by the
heating system
The table below gives a good indication of the
temperature value generally required for different
applications.
Application
Baseboards
Cast Iron
radiators
Warm floor
in concrete
Warm floorr
between
joists
Temp. °F
180°F
155°F
110°F
130°F
Set the value of the second control (Model
of 7.5 to 12kW only) at approximately 5F
below the setting of the first control.
The indicating lamp(s) on front of the unit shall come
ON as you increase the temperature setting of the
control(s).
On initial startup it may take a considerable amount
of time before the water reaches the desired
temperature.
Further adjustments may be necessary as you use
your boiler and space heating system.
4.3 INSPECTION AFTER STARTUP
Measure the amperage drawn by the unit. It
shall be around the value indicated on the
boiler name plate.
Partially close the isolating valve at the
outlet of the boiler to reduce the water flow
and consequently increase the outlet
temperature. Heating elements should stop
at a temperature slightly higher than the
selected value on the controls
Lower
the
adjustment
of
the
room
thermostat(s). The pump should stop but the
element(s) will stay on for a few seconds
until the temperature of the water reaches
the setting temperature of the control(s).
Check the pressure reading at the gauge on
the unit. It should not be higher than 30psi
when the distribution system will reach its
maximum operating temperature.
N.B.:
This boiler is designed to remain hot and
consequently always ready to receive a demand for
heat all through the heating season. It will then be
normal to occasionally see an indicating lamp in
operation for a few seconds even if there is no call
for heat. It will also be normal to occasionally see
the temperature value at the boiler gauge higher
than the normal values. This temperature will get
back to normal at the next heat demand.
SAFETY PRECAUTIONS
!
