Lochinvar 51-211 operation manual Prepare boiler, Remove boiler from wood pallet, Gas conversions

2 Prepare boiler

Remove boiler from wood pallet

1.After removing the outer shipping carton from the boiler, remove the parts box.

2.To remove the boiler from the pallet:

a.Remove the two (2) lag bolts securing the bottom of the unit to the pallet.

b.Lift the boiler off the wall bracket mounted to the pallet.

3.Remove the two (2) lag bolts securing the wall bracket to the wood pallet. Be certain not to lose the wall bracket as it will be needed for securing the boiler to the wall (FIG. 2-1).

NOTICE	Do not drop the boiler or bump the jacket
	on the floor or pallet. Damage to the
	boiler can result.

Figure 2-1Boiler Mounted on Shipping Pallet

REMOVE SHIPPING [WALL] BRACKET

DO NOT DISCARD-

WILL BE NEEDED TO

SECURE THE BOILER

TO THE WALL

Gas conversions

Installation & Operation Manual

Table 2A LP Conversion Table

	LP Conversion Table
Model		LP Orifice Stamping
51		50
81		80
106		105
151		210 / W150
211		210 / W150

1.Remove the front access cover from the unit (no tools required for removal).

2.Disconnect the ribbon cable from the control board. Remove the four (4) screws securing the bezel to the front of the unit and remove the bezel.

3.Locate the power switch on the gas valve and turn the power switch to the “OFF” position (FIG. 2-2).

4.Disconnect the Molex plug from the wiring connector located on the gas valve.

5.Using a 5/16" nut driver, loosen the band clamp securing the air intake coupler to the gas valve venturi. Remove the air intake pipe and coupler from the gas valve venturi.

6.Using a 4mm Allen wrench, remove the two (2) screws securing the gas valve venturi to the inlet of the combustion blower (FIG. 2-2). Remove the gas valve venturi assembly from the unit.

Figure 2-2Gas Valve Power Switch & Venturi Removal

REMOVE THE TWO (2) SCREWS

SECURING THE GAS VALVE VENTURI

TO THE INLET OF THE COMBUSTION BLOWER

POWER SWITCH

DETAIL

￿WARNING

12

The gas conversion procedure should be accomplished BEFORE the boiler is installed. For a boiler already installed, you must turn off gas supply, turn off power, and allow the 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.

You must install the propane orifice to fire the Knight wall mount boiler on propane. Verify when installing that the orifice size marking matches boiler size (Table 2A). Failure to comply could result in severe personal injury, death, or substantial property damage.

7.Using a 4mm Allen wrench, remove the four (4) screws securing the gas valve to the venturi (FIG. 2-3).

8.Locate the propane orifice disk from the conversion kit bag. Verify that the stamping on the orifice disk matches the boiler size (51 - 211, see Table 2A).

9.Place the orifice into the black rubber grommet in the side of the gas valve and secure inside the gas valve (see FIG. 2-3).

10.Reposition the gas valve against the venturi and replace the four (4) screws removed in Step 7, securing the valve to the venturi (FIG. 2-3).

11.Reposition the gas valve venturi assembly inside the unit. Secure the gas valve venturi to the combustion blower by replacing the two (2) screws removed in Step 6 (FIG. 2-2).

12.Reattach the air intake pipe and coupler to the gas valve venturi. Tighten the band clamp to secure.