Nortec Industries GS Series manual Starting The Humidifier, Taking Out Of Operation

￿At the completion of the float test, the humidifier will begin the combustion sequence by energizing the combustion blowers

￿All blowers will run at full output for 30 seconds to pre-purge the combustion chamber. During this time the controller will monitor that all air proving switches closed to prove air flow

￿The igniter(s) will be energized for 15 seconds, allowing it time to heat to the appropriate ignition temperature and the gas valve will be energized

￿After 4 seconds both the gas valve(s) and the igniter will be de-energized

￿After three trials for ignition (complete with pre-purge) the red LED on the ignition control module will begin blinking to indicate a safety lockout and a fault message will be displayed on the humidifier display

￿NOTE: On multiple burner models, each burner tries to ignite in sequence. It is necessary to wait for all burners to cycle to complete the test.

￿Manually re-open the gas supply to the humidifier. No gas should flow to the burner(s)

￿To reset the humidifier, shut off the power switch, then turn the power back on

STARTING THE HUMIDIFIER

Once the tank has been filled and the ignition safety test has been performed as outlined above, the humidifier is ready to be put into operation.

￿Verify that the inspection checklist has been completed and all deficiencies with the installation have been corrected

￿Open the shut-off valve in the gas supply line

￿Open the shut-off valve in the water supply line

￿Ensure all external controls connected to the security loop are closed

￿Verify that the building demand signal is connected to the humidifier

￿Install and secure all cabinet service doors

￿Switch the humidifier on

￿At the completion of the float test, the humidifier will begin the combustion sequence and each burner will ignite in sequence

￿Depending on the system demand the combustion blowers will modulate faster or slower to control the burner input

￿The water in the tank will heat up and begin to boil, delivering steam to the distribution system

￿During the boiling sequence the water fill valve will periodically activate to replenish water that has evaporated from the tank

￿Once the humidity requirements have been satisfied (demand drops below minimum %) all gas valves will be de-energized and the blowers will be shut off after performing a post purge of the combustion chamber

￿The humidifier will go into standby mode until the next call for humidity (demand rises above minimum %) at which time the unit will again begin the combustion sequence

TAKING OUT OF OPERATION

If it is required that the humidifier be taken out of operation (e.g. for service or end of season shut-down), proceed as follows:

￿If the unit is firing, remove the demand signal or open the security loop, allowing the burners to shut off and the blowers to perform a post purge of the heat exchangers before shutting off

￿Switch the main power switch from On to Off and then to the Drain position. The drain pump will be energized and the tank will begin to drain

￿Once the tank has completely emptied shut off the drain switch

￿Close the shut-off valve in the gas supply line

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