Nu-Way MDFL 3300, Руководство по установке и обслуживанию

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Start Flame Failure
Failure of the start rate flame will produce lockout. Confirm start flame failure by checking the flame
signal at the appropriate stage. If the flame signal is low, the cause may be:
1. A dirty or wrongly positioned (it must face towards the flame) glass envelope on the UV cell.
2. A fault in the UV cell or its wiring – check and replace if necessary.
3. The flame signal check link has been removed – check and replace.
4. There is insufficient fuel under ignition conditions to allow the flame to be detected adequately –
adjust the flow rate.
5. Partial blockage of the oil nozzle – check and clean if necessary.
6. Carbon on the air diffuser – check and clean if necessary
Incorrect Rotation of Burner Motor
The motor should rotate anti-clockwise as viewed from the motor end. If the direction of rotation is
incorrect interchange two phases in the three-phase power supply. If this does not correct the
direction of rotation the motor should be renewed.
If it is necessary to change this motor or the combustion air fan the following procedure should be
followed:
1. Switch off the burner and the electrical power supply to the burner.
2. Disconnect the multi-pin plug from the socket on the control system.
3. Remove the screw which holds the control system to its mounting bracket.
4. Lift the control system from its mounting bracket and rest it on the gas valve train.
5. The securing studs, fixing nuts and bolts on the mounting flange are now readily accessible.
Main Flame is Not Established
Burner Motor only runs Continuously
Possible Reason Remedy Possible Reason Remedy
Fuel pressure or flow
too low Check fuel supply to
burner Air control damper motor
failed
Renew
Main gas/oil valve fails
to open Check wiring, replace
valve if faulty Air control damper cam
loose
Tighten
Programming controller
faulty Check and renew as
necessary Microswitch fails to
change over
Renew
Low fire hold link
removed
Replace link
Damper motor incorrectly
wired
Rewire
Gas train gasket
incorrectly positioned
Reposition
Air setting incorrect Reset
SPARE PARTS
For spare parts contact Nu-way’s Parts and Components Division at the address and telephone
number listed on the rear cover of this manual.
To avoid delays, please provide the burner model, serial and specification numbers.
MDFL 3300 & MDFL 4000 Issue 2 08/08 Page 40