39
11.1 - Operating
Before starting the boiler, the following
must be done.
11.1.1 - User
instructions
The user must be correctly instructed
by the installer, on how to operate the
boiler, in particular:
Make sure that the user keeps this
manual and all other documentation
included with the boiler.
Make sure that the user
understands never to tamper with
gas control settings and the risk of
CO poisoning should an
unauthorized individual do so
Make sure that the user is informed
of all the special measures to be
taken for combustion air inlet and
discharging flue gases, and that
these must not be modified.
Make sure that the user knows how
to adjust temperatures, controls and
the room thermostats for maximum
efficiency.
11 - OPERATING
11.1.2 - Filling the
condensate trap
The condensate trap is positioned
inside the boiler as shown in figure 1,
item “46”. It must be filled with water to
prevent the leakage of the flue gases
from the condensate drain pipe, item
“41” in figure 1. To fill the condensate
trap proceed as follows:
disconnect the vent discharge fitting
from opening “2” shown in figure 1;
slowly pour approximately 3.4 oz
(100 ml), of water into the vent
opening - the hole in the middle;
re-connect the vent discharge fitting;
11.1.3 - Filling the
heating system
WARNING!!! Never use non-
approved additives or toxic boiler
treatment chemicals in the heating
system as they can cause serious
health problems or possibly death.
Any additives introduced into the
heating system must be recognized
as safe by the United States Food
and Drug Administration.
To fill the heating system, proceed as
follows:
CAUTION! The heating
system must be filled with clean
water from the domestic water
system. Contaminated water can
damage the boiler voiding its
warranty.
CAUTION!!! The addition of
any chemical substances, such as
anti-freeze, must be carried out
according to the product
instructions. Read and follow
instructions in sections 13.11 and
13.12 to prevent problems.
open the automatic air vent, shown
as item “1” in figure 1, two turns;
open the fill valve located under the
boiler and proceed to fill the heating
system and boiler until the pressure
gauge, item “30” in figure 1, reads
20 psi (
1.5 bar)
and “FILL”
disappears from the display;
check that there is no water leaking
from the fittings. If there is the leaks
must be eliminated;
close the fill valve;
check the pressure gauge during the
purging process. If the pressure has
dropped, re-open the fill valve to
bring the pressure back up to 20 psi
(1.5 bar)
.
11.1.4 - Filling of the
domestic hot water
heat exchanger
(“45WN and 45WE”
models only)
Once the heating system has been
filled and purged, the domestic hot
water heat exchanger must be filled as
follows:
connect a rubber tube to the
pressure coupling “A” shown in
figure 34 and place the end in an
empty bucket or sink;
loosen screw “A” as shown in figure
34 until air can be heard escaping;
once the water runs clear of air
bubbles tighten screw “A”;
remove the tube and check that
there are no water leaks.
11.1.5 – Auto-
purging the
heating system
Each time the on/off power switch,
item “34” in figure 1, is switched on, an
auto-purging cycle lasting 3 minutes
begins. The auto-purging process
involves the turning the pump on and
off in order to remove any air trapped in
the heating system. Before starting the
auto-purging cycle the automatic air
vent, item “1” shown in figure 1 must
be opened.
Figure 34 - Purge screw for the domestic hot water heat exchanger
Summary of Contents for ONEX
Page 3: ...3 SAFETY INSTRUCTIONS ...
Page 79: ...79 NOTE ...
