Installation Instructions

17
Direct-vent and single vent illustrations
Horizontal Installation Vertical Installation
• The diagram above shows direct-vent installations. For single vent installation, connect a 4” elbow
directly on the intake vent collar instead of a straight pipe. See the instructions below for the detail.
• For details of the optional items, refer to the installation manual for each optional item.
• Regarding the clearances from the exhaust terminal to the air inlet or opening, refer to next few
pages.
• Follow all vent system manufacturer’s instructions and all local codes.
• Use 4” Category III/IV approved or Special BH, single or double wall stainless steel vent pipe.
<How to install single vent>
4” vent connection for direct vent installation
1. Connect 4” stainless steel vent
straight pipes directly on the ex-
haust/intake vent collar of the micro
boiler.
4” vent connection for a single vent installation
1. Connect 4” stainless steel vent
straight pipes directly on the exhaust
vent collar of the micro boiler.
2. Connect a 4” elbow directly on the
intake vent collar of the micro boiler.
Roof
Fire stop
Rain cap
Wall
Sidewall vent
Hanger
Hanger
Intake vent
collar (Female)
4" (102 mm)
stainless steel vent
straight pipe
Exhaust vent collar
of the Indoor
models (Female)
4" (102 mm)
stainless
steel vent
straight pipe
Exhaust vent collar
of the Indoor models
(Female)
4” (102 mm)
stainless steel vent
straight pipe
Intake vent
collar (Female)
4" (102 mm)elbow
with bird screen