ECR International Dunkirk Helix DKVLT-050, Installation, Operation & Maintenance Manual

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40
FIGURE 9-5 Offset Screw Location - Models
050/075/100/150/200 MBH
FIGURE 9-6 Offset Screw Location - Model 299 MBH
White Plastic
Offset Screw Is
Located Under The
Aluminum Cap
White Plastic
Offset Screw Is
Located Under The
Aluminum Cap
9 - START UP PROCEDURE
LOW fire combustion - 50/75/100/150/200 MBH
Gas
CO2
CO
Flame
signal
Min Max
Design
Target
μA
Natural
Gas
8.8% 9.3% 9.0%
<100ppm >3.3
Propane 9.8% 10.5% 10.0%
LOW fire combustion - 299 MBH
Gas
CO2
CO
Flame
signal
Min Max
Design
Target
μA
Natural
Gas
8.8% 9.2% 9.0%
<100ppm >4.5
Propane 9.8% 10.5% 10.0%
1.
See Figures 9-5 and 9-6 for location of Offset Screw
on modulating gas valve of various boiler models. T40
male Torx bit is necessary for removal of Offset Screw
cap and adjustment of Offset Screw.
2. Set boiler to High Power using System Test to confirm
combustion in High Fire (Step 2).
3.
Combustion setting is now complete.
A. Exit System Test mode by pushing Enter. High
Power will start flashing.
B. Scroll down to “OFF”. Push Enter button “OFF”
stops flashing.
C. Push Menu button twice to escape Installer Manual.
Boiler returns to CH mode or DHW mode depending
on type of call for heat available.
4.
Check ignition quality 4 times with front jacket off.
Close internal manual gas valve for 5 seconds and then
re-open it. Boiler will go through post purge – prepurge
– ignition sequence. Reset boiler if boiler goes into
lockout.
5. Check ignition quality 4 times with the front jacket on.
Close the external gas shutoff valve for 5 seconds
and re-open it. Boiler will go through a post purge –
prepurge – ignition sequence. Reset the boiler if boiler
goes into lockout.
P/N# 240008888, Rev. O [07/15/2015]