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2
Prepare boiler
Gas conversions
For a boiler already installed, you must
⚠WARNING
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 venturi to operate the AQUAS
Fire Tube boiler on propane gas. Verify when installing
that the venturi label marking matches the boiler size (see
Table 2A).
Table 2A LP Conversion Table
Venturi Ø
Model
Kit #
(mm)
285
100268109
30 mm
*Note: The air shutter should have the hole oriented towards the back
right corner of the unit.
Orifice Ø
Air
Shutter
Bottom
Top
4.20 mm
4.00 mm
100150434
Installation & Operation Manual
1. If boiler is already installed, you must turn
off the gas supply, turn off the power, and allow
the boiler to cool before proceeding.
2. Remove the top panel front access cover from the
unit (no tools required for removal) and remove
the bezel.
3. Disconnect the air inlet piping from the venturi
by loosening the band clamp around the rubber
boot coupling. Slide the rubber boot off of the
venturi.
4. Disconnect gas piping from the venturi by
loosening the threaded nut on the venturi. Remove
the gasket between the gas piping and venturi.
5. Remove the bolts connecting the venturi to the
fan and proceed to remove the natural gas venturi
from the unit, making sure not to damage the
blower O-ring gasket (FIG. 2-1).
6. This unit requires an air shutter to be installed (see
Table 2A):
a.
Disconnect the wiring from the fan and
remove the bolts securing the fan to the
combustion chamber access cover.
b.
Remove the fan and gasket, and install
the air shutter provided in the kit. Install
the air shutter so that the hole in the corner is
oriented towards the back right corner of the
unit (opposite the front door and gas piping).
c.
Replace all torn or damaged gaskets.
Reassemble the fan.
d.
Reconnect the wiring harness before
operation.
7. Install the propane venturi and verify the following:
a.
The UP arrow on the plastic housing is
pointing up.
b.
The threaded connection for the gas piping is
facing towards the front of the unit.
8. Reassemble the gas pipe to the threaded connection
on the venturi. Replace torn or damaged gasket(s)
and ensure the venturi gasket is seated properly
before tightening the nut on the venturi.
9. Reconnect the rubber boot on the air inlet to the
venturi inlet and tighten the band clamp at this
connection.
10. After installation is complete, attach the propane
conversion label (inside the conversion kit) next to
the boiler rating plate. Attach the LP caution label
(inside the conversion kit bag) to the left side of
the boiler underneath the gas supply piping.
11. Replace the top bezel and front access cover
removed in Step 1 and resume operation.
13
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