LAARS Mighty Max HH (Sizes 320M - 1000M) - Installation, Operation and Maintenance Instructions - Manual (Page 12)

Page 12 LAARS HEATING SYSTEMS
3. Remove the vent collar/stack from the flue
collector. Do not damage the vent collar/stack
during removal.
4. Remove the blank plate from the rear of the
jacket.
5. Remove the blank plate from the rear section of
the flue collector. Be careful not to lose the
insulation attached to the plate.
6. Apply high temperature sealant and install the
blank plate (previously removed from the rear
section of the flue collector) on top of the flue
collector.
7. Install the blank plate (previously removed from
the rear of the boiler jacket) over the stack
opening on the top panel of the boiler.
Figure 9. Top-To-Rear Vent Collar.
Adapter Plate
Top Panel
Vent
Collar/Stack
Blank Plate
(Boiler
Jacket)
Blank Plate On
Flue Collector
Blank Plate On
Boiler Jacket
Top Panel
1. Removal of Blank Plate and Adapter
Plate From Boiler
3. Blank Plate Placement
Over Stack Top Opening
Blank Plate
(Flue
Collector)
Vent
Collar/Stack
2. Removal of Blank Plate From
Rear of Flue Collector
4. Connecting Vent Collar/Stack
to Flue Collector
The Mighty Max HH boiler is certified as a true
direct vent unit when installed according to the
instructions for horizontal venting and ducted
combustion air. This can be done even if the runs are
vertical.
2K. Top-to-Rear Vent Collar Conversion
The Mighty Max HH boiler is shipped with the
vent collar on top of the heater. Follow this procedure
to convert it for rear connection (see Figure 9).
1.
Remove the adapter plate from the top panel.
2. On the boiler jacket, remove the top panel and
ease its lip from under the edge of the bonnet to
gain access to the flue collector.