Installation Instructions

14
Two-pipe, direct vent illustrations
Typical installation using PVC. ABS, or polypropylene vent
Horizontal Installation Vertical Installation
For details of the optional items, refer to the installation manual for each optional item.
<How to install intake and exhaust venting (two-pipe, direct vent)
3” vent connection
1. Connect 3” couplings directly on
the exhaust and intake vent collar
of the micro boiler.
2. Connect 3” straight pipes to the
couplings.
From 3” to 4” vent connection
1. Connect 3” x 4” increasers directly
on the exhaust and intake vent
collar of the micro boiler
2. Connect 4” straight pipes to the
increasers.
Roof
Roof
Fire stop
Wall
Connect between exhaust vent collar and piping.
See the below.
3” coupling
Exhaust vent collar
(Female)
3” straight pipe
3” coupling
Intake vent collar
(Female)
3” straight pipe
4” straight pipe
3"x4" increaser
Exhaust vent collar
(Female)
4” straight pipe
Intake vent collar
(Female)
3"x4" increaser