Installing The Burner; Installing The Burner - Sl 10-85 G3, Sl 14-115 G3, Sl 20-160 G3; Installing The Burner - Sl 30-199 G3 - IBC SL 20-160 G3 Installation And Operating Instructions Manual

Figure 45: Tightening pattern
MAINTENANCE
SL 10-85 G3, SL 14-115 G3, SL 20-160 G3, SL 30-199 G3 MODULATING GAS BOILERS
cracking.
12. Place the lid with the burner attached, on a clean dry area.
13. With a permanent marker or equivalent, make an alignment mark on the refractory,
lining it up with the same mark made earlier between the lid and heat exchanger.
14. Carefully remove the refractory, and place it in a clean dry area.
15. If the burner needs to be removed, gradually loosen the five screws that secure the
burner to the heat exchanger lid with a # 15 TORX screwdriver. Then remove the
screws and the burner.

3.4.3 Installing the burner

3.4.3.1 Installing the burner - SL 10-85 G3, SL 14-115 G3, SL 20-160 G3

1. Place the burner gasket onto the heat exchanger lid in the recess.
Note: The burner gasket has a notch that needs to be matched to the key in the
recess.
2. Place the burner into the heat exchanger lid on top of the gasket.
Note: The notch in the burner must match the key in the gasket.
3. Ensure that the O-ring is seated in the groove of the fan coupler, and place the fan
coupler onto the heat exchanger lid.
4. Install the 8 fan coupler screws loosely, then tighten them slowly in a cross pattern so
that the fan coupler is tightened to the lid evenly.
5. Turn on the power and the gas supply to the boiler.
6. Create a call for heat and inspect the fan coupler gasket for leaks.
7. Install the boiler door.

3.4.3.2 Installing the burner - SL 30-199 G3

1. Inspect the burner gasket: look for cracks, deterioration or signs of gas bypass.
Replace if necessary.
2. Place the heat exchanger lid on a flat surface, and position the gasket on the lid,
aligning it with the screw holes.
3. Install the burner in place with its four screws, tightening the screws gradually and in a
cross sequence. Do not over tighten; tighten by hand plus an 1/8 of a turn to maintain a
good seal and to prevent deformation of the burner flange.
4. Inspect the refractory for cracks, degradation and flatness. If in doubt, replace with a
new one.
5. If installing a new refractory, first place it onto the lid, aligning it at the igniter hole,
then make an alignment mark on the refractory to correspond with the previously
made line on the lid.
6. Carefully insert the refractory into the heat exchanger combustion chamber, using the
alignment marks for proper positioning.
7. Ensure that the lid gasket is in good condition, and is in place and level.
8. Carefully insert the lid-burner assembly straight down. Ensure that there is limited
contact between the burner and the refractory as well as observe the alignment
markings.
9. Install the 8 hex nuts to secure the lid in place:
a. Tighten the nuts evenly following the directional arrows shown in figure 45.
b. Tighten by hand (until all nuts are equally snug) plus an extra 1/2 to 1 turn.
Caution! Over-tightening these nuts will cause the lid to warp and possibly leak fumes or
flames.
10. Re-install the igniter, tightening its screws by hand plus an extra 1/8 of a turn.
11. Re-attach the igniter wire to the igniter, gas valve cable and the two fan plugs.
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