2 Prepare boiler (continued)
13.Reattach the Molex plug to the gas valve.
14.Models 55 - 285 only, turn the gas valve power switch to the “ON” position.
15.Model 399 only, turn on power at the source.
16.After the installation is complete, fill out the gas conversion label (in the conversion kit bag) and affix it to the unit under the boiler rating plate inside the unit. Attach the LP caution label (in the conversion kit bag) to the left side of the unit in the lower left corner.
17.Replace the front access cover.
WARNING | After converting to LP, check combustion |
per the |
of this manual. Failure to check and verify combustion could result in severe personal injury, death, or substantial property damage.
Figure 2-3 Installing Propane Orifice
GAS VALVE
GROMMET
BRASS ORIFICE
SCREWS
VENTURI
Mounting the boiler
See page 9 of this manual for boiler mounting location instructions.
NOTICE | The Knight Wall Mount boiler is not | |
intended for floor installation. | ||
|
Mounting to a wood studded wall:
1.The wall mount bracket is designed for a stud spacing of 16 inches from center. For other stud spacing a solid mounting surface must be provided by the installer.
WARNING Do not mount the boiler to a hollow wall. Be sure to mount the boiler to the studs
only.
2.Mount the wall bracket using the 2 1/4" lag bolts provided. Make sure the top edge of the bracket is away from the wall. Ensure the bracket is level when mounted. Extreme care is needed to ensure the bolts are secured in the center of the studs.
3.Hang the boiler on the bracket and secure the bottom of the boiler with two (2) additional lag bolts provided.
Installation & Operation Manual
WARNING The boiler is too heavy for a single person to lift. A minimum of two people is needed for
mounting the boiler onto the bracket.
Mounting to a concrete wall:
1.Mount the wall bracket using the two (2) wedge anchor bolts provided with the bracket. To mount the wedge anchor bolts, drill a 1/4" diameter hole 1 1/8" deep and insert anchor. Hang the bracket from the anchor and secure with the two nuts provided. Make sure the top edge of the bracket is away from the wall. Ensure bracket is level when mounted. Extreme care is needed to ensure the bolts are secured in the center of the studs.
Note: If wall thickness does not allow a 1 1/8" deep hole, field supplied hardware suitable for the application should be provided.
2.Hang the boiler on the bracket and secure the bottom of the boiler with two (2) remaining anchors, following the instructions above.
The boiler is too heavy for a single person to WARNING lift. A minimum of two people is needed for
mounting the boiler onto the bracket.
Mounting to a metal studded wall:
1.The wall mount bracket is designed for a stud spacing of 16 inches from center. For other stud spacing a solid mounting surface must be provided by the installer.
WARNING Do not mount the boiler to a hollow wall. Be sure to mount the boiler to the studs only.
2.Mount the wall bracket using two (2) field supplied toggle bolts capable of supporting 100 pounds each. Ensure the top edge of the bracket is away from the wall. Ensure the bracket is level when mounted. Extreme care is needed to ensure the bolts are secured in the center of the studs.
3.Hang the boiler on the bracket and secure the bottom of the boiler with two (2) field supplied toggle bolts.
WARNING The boiler is too heavy for a single person to lift. A minimum of two people is needed
for mounting the boiler onto the bracket.
Figure 2-4 Mounting the Boiler
WALL:
WOOD OR METAL STUDS ON 16" CENTERS
MASONRY / POURED CONCRETE MOUNTING BRACKET (FACTORY SUPPLIED)
FASTENERS
APPROPRIATE
FOR WALL TYPE
QTY: 4
13 
