82
c. wait 2 to 3 minutes for the CO2 to
stabilize;
d. insert the probe of a calibrated
combustion analyzer into the
combustion analysis probe “H” of
Figures 12-9, 12-11 or 12-13 and
take a flue gas sample;
e. compare the CO2 reading with the
high fire range given in Figure 14-
7, making sure to use the range
for the gas type in use. If the CO2
reading is outside the specified
range, it must be adjusted
operating on the “E” screw of
Figure 15-1 of the gas valve closer
to the burner unit in fire. Use a
2.5mm Allen Wrench to turn the
screw (clockwise to reduce the
CO2 level, counter-clockwise to
increase the CO2 level) in small
increments and wait for the CO2 to
stabilize to prevent overshooting
the desired value;
f. when CO2 level match the value of
Figure 14-7, seal screw “E” (Figure
15-1) with red paint or nail polish
to discourage tampering.
g. set value of parameter
2201
to
LOu
. The Burner 1 (Master) will
now run for 20 minutes at low fire
input;
h. wait 2 to 3 minutes for the CO2 to
stabilize;
i. compare the CO2 reading with
the low fire range given in Figure
14-7, making sure to use the
range for the gas type in use. The
CO2 reading must be inside the
specified range; If not, STOP the
heater and call the Factory service
department (see phone number on
the last cover page).
CAUTION!!!
The CO2 reading, at
low fire, could be affected by the
natural draught of the chimney
(negative pressure inside the
chimney). If this is the case, take
the CO2 reading removing the
correspondent flue gas sensor
(item “30” of figures 3-4 or 3-7)
l. set parameter
2201
to “
OFF
”, to
return the Burner 1 (MASTER) to
its normal running mode.
6. check the CO2 value on the other
burner follow steps as described
in sections (a through l) taking in
the measured flow in ft3/hr by
2500).
4. if the capacity input is too low,
check:
a) that there are no obstructions in
the combustion air and/or vent
systems;
b) check that the flue and air intake
length match with the rules of
Section 12.3;
c) check that the inlet air filter (see
Figure 17-5 item B) is clean;
5. if the capacity input is within
tolerance, bring parameter
2010
to
OFF
to return the heater to its
normal running mode. On models
399 and 500 set parameter
2200
to “
OFF
” to return the heater to its
normal running mode;
6. if the capacity input is higher than
the expected value, repeat the
procedure as per Section 15.8.
15.10 - Minimum
water flow
This water heater have no minimum
water flow requirement.
consideration that for the Burner 2
you have to use parameter
2202
;
7. turn off the main power to the
appliance;
8. close the combustion analisys probe
“H” of Figures 12-9, 12-11 or 12-13
with a suitable cap in accordance
with the vent pipe manufacturers’
instruction.
WARNING!!!
Once the
cap “L” of Figures 12-9, 12-11
or 12-13 is right in place, with
the heater at high fire, check
that it is absent from leakage
and is mechanically fixed.
Improper cap fixing can result
in excessive levels of carbon
monoxide which can cause
severe personal injury or
death!
15.9 - Check the
capacity input
The heater has a factory-set air/gas
ratio. The pressure of the gas at the
burner is indirectly controlled by the
blower. The only way to check the
heater capacity input is operating
directly on the gas meter. To do so
proceed as follow:
1. turn the power switch (item “T” in
Figure 16-1) to on
and perform a
call for heat by pressing button
to its highest settings and operate
downstream the unit to verifiy the
system is able to dissipate all heat
generated.
2. On unit model 199 and 250, gain
access to the installer menu (See
Section 16.11) and set parameter
2010
to
HIgH
. For models 399
and 500, set parameter
2200
to “
HIgH
”. Now boiler will run at
high fire for 20 minutes. Be sure the
heating system is able to dissipate
all energy.
3. measure the capacity input to the
gas meter. This should match
with the value given in Section 18
header “Maximum heat input” with
a tolerance of +/- 10%. (For the
calculation of the btu/hr, for Natural
gas, multiply the measured flow in
ft3/hr by 1075. For LP gas multiply
15 - START-UP
Summary of Contents for Esteem 399
Page 3: ...3 SAFETY INSTRUCTIONS ...
Page 5: ...5 SAFETY INSTRUCTIONS ...
Page 112: ...112 17 MAINTENANCE ...
Page 116: ...116 19 SPARE PARTS Spare parts ...
Page 135: ......
