Nu-Way MGN 2800N, Инструкция по установке и обслуживанию

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MGN 2800N HP 14
AIR DAMPER MOTOR - MODULATING
CONTROL BOX SEQUENCE & TIMING CHART
B
A
Start Run
Off
Ready
For
Restart
Burner Motor
Ignition
Start Rate
Gas Valve
Main Gas Valve
(low flame on h/l)
High Flame
(h/l only)
Operation
T1 T2
T8
T3
T4
T5
T6
T7 T9
T total
Landis & Staefa SQM10
Motor SQM 10
Air Damper
Position
Cam
Factory
Setting
Full Air
Shut-off
2 0°
Low Flame
Air
3 20°
High Flame
Air
1 60°
The fully closed cam (2) is factory set and under normal circumstances should not require further adjustment.
Operation of the low and high flame air switches (cam 3 & 1) is made by manually adjustable cams. Setting
scales provided between the cams simplifies the adjustment. An additional scale at the end of the cam stack
serves as a position indicator.
The air damper assembly can be rotated manually by disconnecting from the drive motor using the lever ‘A’.
The cams should be adjusted by using the special C spanner ‘B’.
Timing
Segment
TMG 740-3 LFL1.3 Operating Mode
Timing
Segment
TMG 740-3 LFL1.3 Operating Mode
T1 40 40 Pre-purge T6 6 12
Delay – Release to High
Flame / Modulation
T2 4 6 Pre-ignition T7 10 18 Post-purge
T3 3 3 Safety Lockout Time T8 8 12 Air Proving Switch Interlock
T4 Delay – Start Rate to Main Flame T9 80 91 Total Start Time
T5 9 12 Delay – Start Rate to Main flame T Total 90 106 Total Cycle Time of Controller
Note:
The pre-purge tomes shown above refers to the control box only. The air damper control will extend the total burner
purge time up to a maximum of 127 seconds depending on the firing rate and air requirements of the appliance.