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MINI ULTRA ELECTRIC BOILERS Installation and operating manual (Revision: May 2015)
17
Section 5: 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, bodily injury, or death. 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 water
supply shut-off valve is closed.
5.1 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.
Turn On the electrical supply to the
boiler with no heat demand from the
thermostat(s).
Completely eliminate all the air from the
boiler and the distribution piping system.
To do so, activate the circulating pump
without the heating elements. If the
pump is connected directly on PP
terminals of the boiler, it can be
activated by selecting “ON” in the
configuration menu after having pressed
for 2 seconds.
Adjust the UltraSmart boiler temperature
controller as explained earlier and set
the purge delay of the pump from On to
its normal operation setting.
Set the room thermostat ON to generate
a heat demand. The pump shall start.
The heating elements shall gradually
come on and the boiler temperature will
increase.
5.2 STARTUP & INSPECTION
Measure the amperage value 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 slowly increase
the outlet temperature. The heating
elements shall gradually stop as the
temperature increases and gets near the
target temperature.
Lower the adjustment of the room
thermostat(s). The heating elements
shall stop and the pump shall stop after
the delay set on the controller.
Check the pressure reading on the
gauge of the unit. It should not be higher
than 28 psi when the distribution system
will get to its maximum operating
temperature.
N.B. On initial startup it may take a considerable
amount of time before the water reaches the
target temperature
Further adjustments may be necessary as you
use your boiler and the space heating system.
SAFETY PRECAUTIONS
!
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