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Installation & Operation Manual
Figure 2-2 Installing Propane Orifice
Remove boiler from wood pallet
1. After removing the outer shipping carton from the boiler,
remove the parts box.
2. Remove the front door to access the lag bolts in front of
the unit (FIG. 2-1).
3. To remove the boiler from the pallet (after removing the
front door):
a. Remove the two lag bolts from the wood pallet
inside the boiler (FIG. 2-1).
b. Detach the boiler from the lag bolts in the rear of the
unit, see FIG. 2-1.
Do not drop the boiler or bump the jacket
on the floor or pallet. Damage to the
boiler can result.
For a boiler already installed, you must
turn off gas supply, turn off power and
allow boiler to cool before proceeding.
You must also completely test the boiler
after conversion to verify performance
as described under Start-up, Section 10
of this manual. Failure to comply could
result in severe personal injury, death, or
substantial property damage.
You must install a propane orifice to
operate the Knight boiler on propane gas.
Verify when installing that the orifice size
marking matches boiler size (Table 2A).
5. After installation 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 top and front access covers.
. 2
Figure 2-1 Boiler Mounted on Shipping Pallet
Gas conversions
NOTICE
ƽ WARNING
Figure 2-3 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. 2-3
below.
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.
LP Conversion Table
Model LP Orifice Stamping
81 80
106 105
151 150
211 210 / W150
286 285
Table 2A LP Conversion Table
1. Remove the top and front access covers from the unit (no
tools required for removal).
2. Remove the three screws securing the gas valve to the
venturi (FIG. 2-2).
3. Locate the propane orifice disk from the conversion kit
bag. Verify that the stamping on the orifice disk matches
the boiler size (see Table 2A).
Place the orifice into the black rubber grommet in the
side of the gas valve and secure in the valve (FIG. 2-2).
4. Reposition the gas valve against the venturi and replace
the screws (FIG. 2-2) securing the valve to the venturi.
2 Prepare boiler