If the ignition fails three times in a row, the cause must be fully investigated. The residual natural gas in the furnace must be drained when the ignition is re-ignited.
If three consecutive ignition failures are required, the cause must be fully identified. The residual gas in the furnace must be discharged when ignition is re-ignited.
If the ignition fails for three times in a row, the cause shall be fully identified. When re ignition, the residual natural gas in the furnace must be discharged<br>