DTH Electric Boilers
USE & CARE MANUAL
(Revision November/05)
, Page
12.
4.3 STARTUP PROCEDURE
1. Fill the boiler as described in section
4.1.
2. Set the boiler operating temperature as
described in section 4.2.
3. Turn down all room thermostats under
room temperature
4. Turn on the boiler power breakers and
switch.
5. The main contactor should close and all
elements should be in operation. Pilot
lights should be on.
6. Temperature inside the boiler should
increase. Elements and pilot lights
should turn off one by one as they reach
their set point.
7. When all elements are off, turn up all
room thermostats above room
temperature.
8. The circulator should start up after a
time delay.
9. The elements should turn on in
sequence as the boiler water
temperature drops below the aquastat
set points. This could take many
minutes.
10. The circulator stays on for as long as
there is a demand for heating. When the
circulator turns off,
11. Temperature inside the boiler should
increase. Elements and pilot lights
should turn off one by one at they reach
their aquastat set point.
In this way, the power drawn by the boiler
depends on the actual heating load of the
building. If you need only one stage to heat your
home, only one will be turned on; if you need
two stages, two will be turned on. Excessive
cycling and wear and tear of electric
components will be avoided, thus increasing
their life reducing heating cost.
