Bradford-White Corp BNTV, BNTH warranty SECTION Operating Instructions, Filling the Boiler System

Brute Elite Page 43

SECTION 10.

Operating Instructions

10.1 Filling the Boiler System

1.Ensure the system is fully connected. Close all bleeding devices and open make-up water valve. Allow system to fill slowly.

2.If make-up water pump is employed, adjust pressure switch on 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 bleeding devices on all radiation units at the high points in the piping throughout the system, unless automatic air bleeders are provided at such points.

Note that there is an air bleed located on the left side of Brute Elite, 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 system and appliance pump for a minimum of 30 minutes with the gas shut off.

WARNING

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 flow switch operation (if equipped), and check for debris. If debris is present, clean out to ensure proper circulation.

7.Recheck all air bleeders as described in Step 4.

8.Check liquid level in expansion tank. With the system full of water and under normal operating pressure, the level of water in the expansion tank should not exceed ¼ of the total, with the balance filled with air.

9.Start up boiler according to the procedure in this manual. Operate the entire system, including the pump, boiler, and radiation units for one (1) hour.

10.Recheck the water level in the expansion tank. If the water level exceeds ¼ of the volume of the expansion tank, open the tank drain, and drain to that level.

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 make-up water valve and check strainer in pressure reducing valve for sediment or debris from the make-up water line. Reopen make-up water valve.

13.Check gauge for correct water pressure and also check water level in the system. If the height indicated above the boiler insures that water is at the highest point in the circulating loop, then the system is ready for operation.

14.Prime condensate trap with water (not required for BNTH 600, 750, 850).

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. Main gas terminals will be energized, attempting to light, for four (4) seconds, and then will de-energize. The unit will go into lockout after the required number of trial for ignition periods.

Second, turn the power off, press the manual reset button on the boiler control, or the user display, 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 (3) 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.

WARNING

Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance

and to replace any part of the control system and any gas control that may have been

under water.

10.2 Operating the Burner and Set Up

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.

10.2.1 Burner Operation

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 instructions and all local codes.

2.Determine that the appliance 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