G115 Direct Vent Installation Instructions

9
Burner Settings
Always use instruments to check combustion.
DO NOT ADJUST BURNER OPERATION BY EYE!
Necessary Equipment:
CO2 analyser
Draft gauge
Fuel pressure gauge
Stack thermometer
Smoke tester
Overfire measurements should be made from the burner observation port located at the front of the
boiler. Make sure when taking measurements that the air space surrounding the pressure probe is
completely blocked off with fiberglass or mineral wool.
Breeching measurements should be taken at the exhaust vent termination outside the building.
The furnished burner is factory set for your Buderus boiler model and should require only minor
adjustments. Install and set the burner per burner manufacturer's instructions.
Table 2: Preliminary burner settings
Boiler
Model
Burner
Model
Nozzle* Air
Band
Set
Head
Set
Press.
(psi)
Blast
Tube
Insertion
Stack
Temp*
G115/21 Riello BF3 .5 Dlv. 80ºW 3.5 0.0 145 6” 315
G115/21 Beckett NX .5 Dlv. 60ºW N/A 1.0 150 4.88” 417
G115/21 Carlin P10 .5 Dlv. 60ºA .40 .50 150 4" 340
G115/28 Riello BF3 .65 Dlv. 60ºW 5.5 3.0 145 6” 310
G115/28 Beckett NX .6 Dlv. 60ºB N/A 2.5 175 4.88” 319
G115/28 Carlin P10 .65 Hago 60ºES .65 .60/.65 150 4" 340
G115/34 Riello BF5 .85 Dlv. 60ºW 4.5 3.0 145 10” 350
G115/34 Beckett NX .75 Dlv. 60ºB N/A 2..25 175 4.88” 330
G115/34 Carlin P10 .85 Dlv. 60ºB .85 .85/1.0 150 4" 400
Blast Tube Insertion depth: Measured from tip of end cone to flange gasket.
* Shows approximate net stack temperature in ºF based on air inlet temperature of 70 ºF.
NOTE: Actual operating settings on the burner may differ from the factory setting. Adjust burner
settings to obtain a #0 smoke reading with a CO2 value of 11.0% - 12.5%. Above settings were obtained
with baffle plates removed. Boiler baffle plates may have to be removed to keep net stack temperatures
sufficiently high (above 220 ºF).
NOTE: Run burner for 30 to 60 minutes on new boiler installations before performing smoke readings.
Initial smoke readings may be high due to burn-off of sealing compound.
Verify the following after 5 to 10 minutes of burner operation:
1. Oil pump pressure should be 140 - 150 psi for the Riello BF burners; 140 - 150 psi for the Carlin
P10 burners. Make adjustments if necessary.
2. Adjust the air set to get a CO2 value of 11.0% – 12.5% with 0 smoke #. Perform final test with
all covers and inlet piping in place.
NOTE: Stop burner operation at once if smoke emerges from the exhaust terminal. Check and make
necessary burner adjustments to obtain smoke-free flue products.
NOTE: MAKE SURE the burner observation port located on the burner door is sealed air-tight by
properly tightening the port screw. Use extra sealant if necessary.
NOTE: Affix the transparent blank cover label over the boiler rating plate. Affix the electrical and
clearance label on the boiler jacket near the boiler rating plate.