Installation / Operation Instruction Manual

Page 32
Bradford White Corp
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
appliance.
4. Switch on the appliance power switch located on
the right side of the unit.
5. The Brute Deluxe will enter the start sequence,
as long as the unit is being called for heat. The
blower and pump come on for pre-purge, then
the ignitor warm-up sequence starts and after
the ignitor warm-up is complete and all safety
devices are veried, the gas valves open. If
ignition doesn’t occur, check that there is proper
gas supply. Wait 5 minutes and start the unit again.
During initial start up, air in the gas line may
cause the Brute Deluxe to "lock out" during the
rst few trials for ignition. If the ignition control
locks out, reset by cycling the power o and on
using the main power switch on the right side of
the cabinet.
6. When the unit is running, the supply gas pressure
must be checked. Inlet gas pressure must not
exceed 10.5 in. w.c. (2.5 kPa) for Natural Gas and
13 in. w.c. (3.2 kPa) for LP. The minimum inlet
gas pressure is 4 in. w.c. (1.2 kPa) for Natural Gas
and 8 in. w.c. (2 kPa) for LP. See Table 11
7. Once the inlet gas pressure is veried, the outlet
gas pressure from each valve (manifold gas
pressure) must be checked, and adjusted, if
necessary. The manifold gas pressure must be 3.0
in. w.c. (0.62 kPa) for natural gas and 9.0 in. w.c.
(2.2 kPa) for LP. Also See Table 11
8. Set the air box pressure to 1" w.c. adjusting air
shutter on the blower as a starting point. Then
adjust the shutter to get the required CO
2
%.
Closing the shutter will increase CO
2
%.
Opening the shutter will lower the CO
2
%
9. Complete the setup by checking the CO
2
at the
outlet of the unit. The CO
2
should be 8% for
natural gas, or 9.2% for LP.
10. After placing the appliance in operation, the
Burner Safety Shuto Device must be tested. To
test:
(a) Close gas shuto valve with burner operating.
(b) The ame will go out and blower will continue
to run for the post purge cycle. Three attempts to
light will follow. Ignition will not occur as the gas
is o. The ignition control will lockout, and will
have to be reset by cycling the power before the
unit will operate.
(c) Open gas shuto valve. Restart the appliance.
The ignition sequence will start again and the
burner will start. The appliance will return to its
previous mode of operation.
11. Check all heat exchanger water connections, ange
6.F.2 High Altitude Adjustment and Set-Up
High altitude adjustment must not be made on
appliances operating at elevations below 2500 ft. (762 m).
No orice changes are required to adjust the
Brute Deluxe appliances for high altitude. High
altitude adjustment is accomplished by adjustment
of the air shutter. A CO
2
or O
2
analyzer is required to
make these adjustments.
Start the adjustment process by checking the CO
2
in the “as installed” condition. Adjust the air shutter(s)
so that the CO
2
is about 8% or the O
2
is about 6.8%
for appliances operating on natural gas. For appliances
operating on LP Gas adjust the air shutter(s) so that the
CO
2
is about 9.2% or the O
2
is about 6.8%.
If the appropriate CO
2
/ O
2
levels cannot be
achieved by adjusting the air shutter. Contact the
Technical Services Department at number shown on
back page.
The amount of derate will vary depending on
heating value of the fuel and the elevation at the
installation site.
Caution
Should any odor of gas be detected, or if the
gas burner does not appear to be functioning
in a normal manner, close main shutoff valve,
do not shut off switch, and contact your heating
contractor, gas company, or factory representative.
Attention
Si vous sentez une odeur de gaz ou si le brûleur
à gaz ne parait pas fonctionner de manière
normale, fermez la vanne d’isolement, ne fermez
aucun interrupteur, et appelez votre entreprise
de chauffage, la compagnie de gaz ou un
représentant du fabricant.
Supply
MIN MAX
w.c. kPa w.c. kPa
Manifold
w.c. kPa
Nat 4 1.0 10.5 2.5 3 0.7
LP 8 2.0 13 3.2 9 2.2
Table 11. Gas Pressure in inches (w.c.)
and header gaskets for watertight integrity 24
hours after commissioning. If there are any signs
of water leakage, re-torque fasteners or re-seat
threaded connections as necessary to eliminate
leakage.