Burner Flame Check - andrews RFF 13/175 Installation And Service Manual

5.2

Burner flame check

Fig. 11
5.3 Control sequence of operation
Issue 4 21042018
Steel Burner: These models are equipped with self-adjusting air
mixture and do not have an adjustable air shutter. At the time of
installation and during annual maintenance, a visual check of the
pilot and burner flames should be made to determine if they are
burning properly. The burner flames should be blue with yellow
tips. A blue-orange flame is characteristic of operation on
liquefied petroleum (LPG) gas.
Note
IMPORTANT- In the event of an emergency, turn off the
gas and electric (if applicable) to the appliance.
IMPORTANT- The water heater should be inspected
at a minimum annually by a qualified service
technician for damaged components and/or joints
not sealed. DO NOT operate this water heater if any
part is found damaged or if any joint is found not
sealed.
Warning
Water heaters are heat producing appliances. To avoid
damage or injury there shall be no materials stored
against the water heater or flue system, and proper
care shall be taken to avoid unnecessary contact
(especially by children) with the water heater and flue
system.
UNDER NO CIRCUMSTANCES SHALL FLAMMABLE
MATERIALS, SUCH AS PETROL OR PAINT
THINNER BE USED OR STORED IN THE VICINITY
OF THIS WATER HEATER, VENT SYSTEM OR IN
ANY LOCATION FROM WHICH FUMES COULD
REACH THE WATER HEATER OR FLUE SYSTEM.
5.3.1 Start-up sequence
Upon powering up, the control checks for the presence of the
resistive plug. If the resistance is in the expected range, the
control will begin normal operation after 5 to 8 seconds.
5.3.2 Sequence of operation
1. A call for heat from thermostat
2. Fan ON
3. Pressure switch contacts closed (no exhaust pipe blockage)
4. Fan pre-purge
5. Igniter warm-up
6. Main burner ON
7. Flame signal confirmed
8. Thermostat satisfied
9. Main burner OFF
10. Fan post-purge
24