First Start Up And Adjustment; Filling The Boiler System; First Operation - Bradford White Brute BNTH Installation And Operation Instructions Manual

Page 54
Section 9 -
First Start Up and Adjustment
9.1 Filling the Boiler System
1. Ensure the system is fully connected. Close all
bleeding devices and open the make-up water
valve. Allow the system to fill slowly.
2. If a make-up water pump is employed, adjust the
pressure switch on the pumping system to provide
a minimum of 12 psi (81.8 kPa) at the highest
point in the heating loop.
3. If a water pressure regulator is provided on the
make-up water line, adjust the pressure regulator
to provide at least 12 psi (81.8 kPa) at the highest
point in the heating loop.
4. Open all of the bleeding devices on all radiation
units at the high points in the piping throughout the
system, unless automatic air bleeders are provided
at these points.
Note - There is an air bleed located on the left
side of Brute unit, on top of the water manifold.
5. Cycle the boiler pump on and off 10 times, 10
seconds on and 10 seconds off, to remove all air
from the heat exchanger. Then run the system and
appliance pumps for a minimum of 30 minutes with
the gas shut off.
Failure to remove all air from the heat exchanger could
lead to property damage, severe injury or death.
6. Open all strainers in the circulating system, check
the operation of the flow switch (if equipped), and
check for debris. If any debris is present, clean it
out to ensure proper circulation.
7. Recheck all air bleeders as described in Step 4.
9. Start up the boiler according to the procedure
listed in this manual. Operate the entire system,
including the pump, boiler, and radiation units for
one hour.
11. Shut down the entire system and vent all radiation
units and high points in the system piping, as
described in Step 4.
12. Close the make-up water valve and check
the strainer in the pressure reducing valve for
sediment or debris from the make-up water line.
Reopen the make-up water valve.
13. Check the gauge for correct water pressure and
also check the water level in the system. If the
height indicated above the boiler insures that water
WARNING
is at the highest point in the circulating loop, then
the system is ready for operation.
14. Prime the condensate trap with water. (This is not
required for BNTH 600, 750, and 850 units.)
15. Refer to local codes and the make-up water valve
manufacturer's instructions as to whether the
make-up water valve should be left open or closed.
16. After placing the unit in operation, the ignition
system safety shutoff device must be tested.
First, shut off the manual gas valve, and call
the unit for heat. The main gas terminals will be
energized, and attempt to light, for four seconds,
and then will de-energize. The unit will go into
lockout after the required number of trial for ignition
periods.
Next, turn the power Off, and then On again.
Press the manual reset button on the boiler control,
open the manual gas valve, and allow the unit to
light. While the unit is operating, close the manual
gas valve and ensure that power to the main gas
valve has been cut.
17. Within three days of start-up, recheck all air
bleeders and the expansion tank as described in
Steps 4 and 8 above.
Important Note: The installer is responsible for
identifying to the owner/operator the location of all
emergency shutoff devices.
Do not use this appliance if any part has been under
water. Bradford White requires boilers and water
heaters to be replaced, not repaired, if they have
been partially or completely submerged.
9.2 First Operation
The initial setup must be checked before the unit is
put in 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.
REQUIRED TOOLS: differential pressure gauge
capable of reading negative 0.01 inches W.C.
(0.002kPa), screw drivers, Torx bits, combustion
analyzer.
1. Using this manual, make sure the installation
is complete and in full compliance with the
B W
RADFORD
WARNING
Caution
HITE