Prepare boiler – Lochinvar Kight XL 400-801 User Manual
Page 13

13
SCREWDRIVER
SLOT
LOWER
RAISE
Figure 2-7 Leveling Legs on the Boiler
Leveling the boiler
1. Set the boiler in place and check level.
a) Adjust legs if necessary to level boiler, see FIG. 2-7
below.
ALLEN WRENCH
ADJUSTMENT SCREW
Figure 2-5 Gas Valve Adjustment - Model 501
Model 501
1. Remove the top access cover from the unit (Philips Head
screwdriver required for removal).
2. Turn the adjustment screw on the gas valve clockwise until
it stops. Then turn the adjustment screw counterclockwise 
four and three quarter (4 3/4) turns (see FIG. 2-5). 
3. Use a combustion analyzer to verify CO
2
is within the range
of 9.6 – 10.5%. If not, adjust the screw counterclockwise 
incrementally to raise CO
2
and clockwise to lower CO
2
(FIG. 2-5).
 
4. After adjustment is complete, attach the propane conversion 
label (in the conversion kit bag) next to the boiler rating 
plate. Attach the LP caution label (in the conversion kit bag) 
to the left side of the unit in the lower left corner.
5. Replace the top access cover.
COVER
ALLEN WRENCH
ADJUSTMENT SCREW
Figure 2-6 Gas Valve Adjustment - Models 601 - 801
Models 601 - 801
1. Remove the top access cover from the unit (Philips Head
screwdriver required for removal).
2. Remove the cover on top of the gas valve (FIG. 2-6).
3. Turn the adjustment screw on top of the gas valve clockwise
one and three quarter (1 3/4) turns on the 601 Model, one 
and a half (1 1/2) turns on the 701 Model, and one turn on 
the 801 Model (see FIG. 2-6). 
4. Use a combustion analyzer to verify CO
2
is within the range
of 9.6 – 10.5%. If not, adjust the screw counterclockwise 
incrementally to raise CO
2
and clockwise to lower CO
2
(FIG. 2-6).
 
5. After adjustment is complete, attach the propane conversion 
label (in the conversion kit bag) next to the boiler rating 
plate. Attach the LP caution label (in the conversion kit 
bag) to the left side of the unit in the lower left corner.
6. Replace the gas valve cover along with the top access cover.
ƽ WARNING
After converting to LP, check combustion 
per the Start-up procedure in Section 10 
of this manual. Failure to check and verify 
combustion could result in severe personal 
injury, death, or substantial property 
damage.
ƽ WARNING
After converting to LP, check combustion 
per the Start-up procedure in Section 
10 of this manual. Failure to check and 
verify combustion could result in severe 
personal injury, death, or substantial 
property damage.
2
Prepare boiler
(continued)
Outdoor Knight XL Installation & Operation
Manual
