Installation / Operation Instruction Manual
Page 23
Brute Mini
SECTION 7.
7A Filling the System
It is crucial to the efcient operation of the system
that all air be removed from the circuit. For this
reason, an air scoop and vent should be located close
to the boiler outlet, and there should be a minimum
distance between cold water feed and system purge
valve.
1. When the system has been completely installed,
close all air vents and open the makeup water
valve. Allow the circuit to ll slowly.
2. If a make-up water pump is employed, adjust the
pressure to provide a minimum of 12 psi (83kPa)
at the highest point in the circuit. If a pressure
regulator is also installed in the line, adjust it to
the same pressure.
3. Close all valves. Purge one circuit at a time as
follows:
a. Open one circuit drain valve and let water
drain out for at least 5 minutes. Be certain
there are no air bubbles visible in the water
stream before closing the drain valve.
b. Repeat this procedure for each circuit.
4. Open all valves after all circuits have been
purged.
5. Run the system circulating pump for a minimum
of 30 minutes with the boiler shut off.
6. Open all strainers in the system, and check for
debris.
7. Recheck all air vents as described in Step 3.
8. Inspect the liquid level in the expansion tank,
with the system full of water, and under normal
operating pressure, to ensure proper water level
in the expansion tank.
9. Start up boiler according to the procedures
described in Section 2 and operate the system,
including the pump, boiler, and radiation units,
for one hour.
10. Recheck the water level in the expansion tank. If
it exceeds 1/2 of the volume of the tank, open the
tank drain and reduce the water level.
11. Shut down the entire system, and vent all
radiation units and high points in the system.
12. Close the water makeup valve and check the
strainer in the pressure reducing valve for
sediment or debris. Reopen the water makeup
valve.
13. Verify system pressure with the boiler pressure
gauge before beginning regular operation.
14. Within 3 days of start-up, recheck and bleed
all air vents and the expansion tank using these
instructions.
SECTION 8.
Operating Procedures
Before placing the boiler in operation, check and
reset the safety shutoff devices. Once the boiler is
connected to the gas and water piping and after all the
requirements in previous pages have been met, follow
these procedures:
8A. System Start-up
1. Verify that the pump system is operating
properly:
a. Shut off the manual gas valve located
outside the boiler.
b. Raise the wall thermostat high enough to
call for heat.
c. The pump should come on immediately. If
it does not, test the electrical circuits.
2. Pilot and Main Burner Lighting:
a. The BJVS boiler does not require manual
lighting. The pilot is controlled by the
automatic ignition system.
b. Different models of the BJVS boiler utilize
various gas valves. Although the gas valves
may have different control knobs, they are
all similar in operation.
c. Understand and follow the operating
instructions that are applicable to the type
of ignition system installed on the boiler.
3. The pilot and main burners will automatically
ignite when there is a call for heat.
8B. Sequence of Operation
1. Wall thermostat will call for heat.
2. Pump relay will turn on the circulating pump.
3. If water temperature is below the limit setting,
the inducer motor relay will turn on the draft
inducer (JVH).
4. Pressure switch will sense the fan (JVH only)
operation and send 24 volts to the ame rollout
switch.
5. In normal conditions, the ame rollout switch
will be in a closed position. 24 volts will be sent
to the gas valve/controller, the igniter will
glow/spark and the pilot valve will open, lighting
the pilot.
6. After pilot is proven to be lit, the main gas valve
will open, the main burners will ignite and
continue until either the primary control, hi-limit
or wall thermostat opens.
7. When the wall thermostat is satised, the burners
will shut off. The relays will turn off the draft
inducer (JVH only) and the circulating pump.
When the room temperature falls below the wall
thermostat setting, the cycle will repeat.