Initial Burner Operation; Shutting Down The Brute; Restarting The Brute - Bradford White Brute BNTH1000 Installation And Operation Instructions Manual

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Brute
B
TM
RUTE. BOILERS AND VOLUME WATER HEATERS, 1,000 & 1,200 MBTU/h
10.2

Initial Burner Operation

The initial setup must be checked before the unit is
put into operation. Problems such as failure to start,
rough ignition, strong exhaust odors, etc. can be due
to improper setup. Damage to the boiler resulting
from improper setup is not covered by the limited
warranty.
For Combustion Setup Procedure, See
Section 9.4 -O
For CO2 Values, See "Table 17 – CO2 Range
and Pressure Differential" on page 71
Improper adjustment may lead to poor combustion
quality, increasing the amount of carbon monoxide
produced. Excessive carbon monoxide levels may
lead to personal injury or death.
1.
Using this manual, make sure the installation
is complete and in full compliance with the
instructions and all local codes.
2.
Determine that the unit and system are filled
with water and all air has been bled from both.
Open all valves.
3.
Observe all warnings on the Operating
Instructions label and turn on gas and electrical
power to the unit.
4.
The Brute will enter the start sequence. The
blower and pump will energize for pre-purge,
then the ignition sequence will start. After all
safety devices are verified, the gas valve will
open. If ignition doesn't occur, turn off the Brute
1000 & 1200. Check that there is proper supply
of gas. Wait five minutes and start the unit
again.
5.
If ignition starts normally, leave the Brute
turned on.
6.
After placing the unit in operation, the Burner
Safety Shutoff Device must be tested:
(a)
Close the gas shutoff valve with the
burner operating.
(b)
The flame will go out, and the blower will
continue to run for the post purge cycle. A
few additional attempts to light will follow
including pre-purge, ignitor on, valve/
flame on and post purge. Ignition will not
occur because the gas is turned off. The
ignition control will lockout.
(c)
Open the gas shutoff valve. Reset the
boiler control by pressing the Reset
WARNING
button on the control. Restart the
appliance. The ignition sequence will
start again and the burner will start. The
appliance will return to its previous mode
of operation.
Caution
If any odor of gas is detected, or if the gas burner
does not appear to be functioning in a normal
manner, close the main gas shutoff valve.
Do not shut off the power switch. Contact your
heating contractor, gas company, or factory
representative.
10.3
Shutting Down the Brute 1000 & 1200
This step must be performed by a qualified
service person.
1.
Turn off the main electrical disconnect switch.
2.
Close all manual gas valves.
3.
If freezing is anticipated, drain the Brute and
be sure to also protect the building piping from
freezing. All water must be removed from the
heat exchanger or damage from freezing may
occur.
10.4
Restarting the Brute 1000 & 1200
If the system has been drained, see Section 10.1 for
instructions on proper filling and purging.
1.
Turn off the main electrical disconnect switch.
2.
Close all manual gas valves.
3.
Wait five minutes.
4.
Set the aquastat or thermostat to its lowest
setting.
5.
Open all manual gas valves.
6.
Reset all safety switches (pressure switch,
manual reset high limit, etc.).
7.
Set the temperature controller to the desired
temperature setting and switch on the
electrical power.
8.
Each burner will go through a prepurge period
and ignitor warm-up period, followed by
ignition.
Page 87

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