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10.0 Commissioning and Control Settings
All Brivis heaters have been factory tested, but should be commissioned and adjusted in accordance with the
following instructions to ensure efficient and optimal heating performance.
Remember:
•
Switch the mains power OFF before touching any wiring
•
All these steps must be carried out by a qualified tradesperson
•
If the heater cannot be adjusted to operate in accordance with these instructions, then contact the Brivis
Customer Service Centre (contact details are on the back cover of this manual)
10.1 Commissioning Instructions
With a correctly designed and installed ducted system, generally the balancing damper in an outlet register
should be initially set as follows:
•
Living areas: 100% open
•
Bedrooms: 50% open
•
Bathrooms, ensuite & Laundry: 25% open
10.2 Start & Check Supply Pressure
1. Turn OFF the 240 Volt ac power supply at the fixed switched socket outlet adjacent to the unit.
2. Ensure the gas cock adjacent to the heater is in the OFF position.
3. Locate gas valve inlet pressure test point, remove the grub screw and insert your test point fitting (hose
tail 1/8” NPT).
4. Attach a manometer to the test point.
5. Ensure that all air has been purged from the gas piping and then turn ON the gas cock adjacent to the
unit.
6. Turn on the 240 Volt ac power supply adjacent to the unit.
7. Go to the Thermostat, turn it ON and increase the temperature setting so that it calls for heat.
8. The unit will now attempt to ignite.
9. Once the ignition is successful allow the unit to run for one minute, ensuring the gas supply pressure does
not fall to below 1.1kPa
while other gas appliances are operating at their full capacity.
10. If the reading is below 1.1kPa, then the incoming gas supply is inadequate (check supply pipe for
blockage, and check pipe sizing and gas meter sizing).
11. Turn the unit OFF at the thermostat, isolate the gas and the 240 Volt power supply adjacent to the unit.
12. Remove and replace test point with the grub screw.
If the heater does not attempt ignition at all:
•
Check the Lighting Procedure again and if it still fails to light, by-pass the Thermostat by removing cables
from the terminal block at the unit and link (bridge) terminals "R" and "W". If it then lights, there is a fault
with the wires to the Thermostat or in the Thermostat itself. If it does not light, check the overheat switch
has not tripped or the 2 amp fuse has not blown.
10.3 Start & Check Burner Pressure
1. Repeat steps 1 to 7 in Section 8.2. For step 3 relocate the test point fitting from the inlet pressure test
point to the burner pressure test point on the gas valve, or if fitted use the test point on the manifold.
2. Take a manometer reading of the test point pressure and confirm it is equal to the figure shown on the
appliance data label. If the pressure reading is not correct, adjust the gas valve pressure regulator either
up or down to match the required test point pressure. If the pressure is lower than the required amount
and cannot be adjusted any higher, this indicates that the incoming supply pressure is not sufficient
(check supply pipe for blockage, and check pipe and gas meter sizing).
Note:
If the unit does not ignite on the first attempt it may be a result of all air not being purged from the gas
supply line. The heater will attempt to ignite up to five times before locking out, after which it will require a power
reset.
