Bradford-White Corp BRUTE DELUXE BMT2V ユーザーズマニュアル

Page 29

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.

5.  Run system circulating pump for a minimum of 

30 minutes with the boiler shut off.

6.  Open all strainers in the circulating system, 

check flow switch operation, 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.  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.

15.  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. After the pre-purge and ignitor 

heat-up time, the main gas terminals will be 

energized, attempting to light, for seven (7) 

seconds, and then will de-energize. The unit will 

attempt to light two more times, and then will go 

into lockout mode. Second, turn the power off 

and then on again, 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.

16.  Within three (3) days of start-up, recheck all air 

bleeders and the expansion tank as described in 

Steps 4 and 8 above.

Important: 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. 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.

N’utilisez pas cet appareil si l’une de ses pièces est 

passée sous l’eau. Appelez tout de suite un technicien 

en entretien et en réparation pour inspection de 

l’appareil et remplacement des pièces du système de 

commande, et des pièces de commande du circuit 

gaz, qui sont passées sous l’eau.

To utilize the boiler's on-board controller, be sure 

to have the “Local/Remote” selector switch to “Local”. 

Set the controller to the desired operating set point. 

The controller has an interstage differential that can be 

adjusted from 3°F to 10°F. This allows the user to have 

some control over how stage 2 and stage 1 call for heat 

(

see Figure 19

).

Because the Brute Deluxe controller senses inlet 

water and the manual reset high limit senses outlet 

water, the high limit should be set 40-50°F higher than 

the controller, to avoid nuisance lockout of the manual 

reset high limit.

If controlling the stages of the BMT2 from an 

external source (multiple boiler control, BAS, etc) the 

“Local/Remote” selector switch above the terminal 

strip must be placed in the “Remote” position. In this 

mode, the controller that is mounted on the BMT2 

will no longer have control of the unit. The 24V from 

the unit waits at the input terminal, and the external