Lennox BAC 024 SNM 3M, Инструкция по установке, эксплуатации и обслуживанию

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BALTIC-IOM-0412-E / Service manual
GAS BURNERS
Preliminary checks before start-up
Note:
Any work on the gas system must be carried out by quali fi ed personnel.
This unit must be installed in accordance with local safety codes and regulations and can only be used in planed installation conditions
for outdoor.
Please read carefully the manufacturer’s instructions before starting a unit.
Before commissioning a unit with gas burner, it is mandatory to ensure that the gas distribution system (type of gas, available
pressure…) is compatible with the adjustment and settings of the unit.
Check access and clearance around the unit
• make sure one can move freely around the unit.
• a minimum one-meter clearance must be left in front of the burnt gas exhaust
fl ue.
• combustion air inlet and burnt gas exhaust(s) must not be obstructed in any way.
Supply network pipe sizing
Male threaded connection for gas burner: 3/4”
Check that the gas supply line can provide the burners with the pressure and the gas fl ow rate necessary to provide the heating
nominal output.
Starting up the gas burner
Purge the pipe-work near the connection on the ignition control valve for a few seconds.
• check that the unit's treatment “fan” blower is running.
• set the control to “on” this will priorities the gas burner.
• increase the set temperature (room set point temperature) to a temperature higher
than the actual room temperature.
For modulating gas we have just H power for c, d & e-box
• the gas supply of a rooftop gas unit must be realized according to sound engineering practice and the local safety codes and rules.
• in any case the diameter of pipe-work connected to each rooftop must not be smaller than the diameter of the connection on the
rooftop unit.
• make sure that a shut-off isolation valve has been installed before each rooftop.
• check the supply voltage to the exit of the power supply's transformer t3 of the burner: it must be between 220 and 240v.
Unit size
S power
H power
Unit size
S power
H power
Gas fl ow - m 3 /h (for G20 at 20 mbar and 15°C)
Number of male threaded connections (3/4”)