Rinnai M060C Installation And Operation Manual page 22

1. Determine the termination method—
horizontal or vertical, concentric, or twin
pipes, etc.
2. Determine proper location for wall or roof
penetration for each termination.
3. Install termination assembly as described in
this manual or in the vent manufacturer's
installation instructions.
4. Install air and vent piping from boiler to
termination.
5. Slope horizontal exhaust run towards the
boiler 1/4 in. per foot. DO NOT slope
combustion air pipe towards boiler.
6. Install vent supports and brackets allowing
for movement from expansion, or as per
vent manufacturer's instructions or local
code requirements.
7. (Optional step) Install vent screen or room
air filter (not included with purchase) on
Schedule 40 PVC combustion air and
exhaust termination elbows as illustrated
below.
Vent Screen
•
•
Room Air Filter
Press air filter into the 3 in.
(80 mm) PP intake air fitting
on the boiler.
Check to determine whether local codes
supersede the following clearances:
•
Avoid termination locations near a dryer
vent.
22
Press vent screen inside
of termination piece/
elbow.
Secure vent screen to
the elbow with screw.
Rinnai M-Series Condensing Boiler Combi Manual
•
Avoid termination locations near
commercial cooking exhaust.
•
Avoid termination locations near any air
inlets.
•
You must install a vent termination at
least 12 in above the ground or
anticipated snow level.
The vent for this appliance shall not terminate:
•
Over public walkways.
•
Near soffit vents or crawl space vents or
other area where condensate or vapor
could create a nuisance or hazard or
cause property damage.
•
Where condensate or vapor could cause
damage or could be detrimental to the
operation of regulators pressure relief
valves, or other equipment.
Listed below are important considerations for
locating vent termination under a soffit
(ventilated or unventilated or eave vent; or to a
deck or porch):
•
Do not install vent termination under a
soffit vent such that exhaust can enter
the soffit vent.
•
Install vent termination such that exhaust
and rising moisture will not collect under
eaves. Discoloration to the exterior of the
building could occur if installed too close.
•
Do not install the vent termination too
close under the soffit where it could
present recirculation of exhaust gases
back into the combustion air intake of the
termination.
Horizontal portions of the venting system shall
be supported to prevent sagging:
•
For category IV boilers, have horizontal
runs sloping upwards not less than 1/4 in.
per foot (21 mm/m) from the boiler to
the vent terminal;
•
For category IV boilers, be installed so as
to prevent accumulation of condensate;
and
•
For category IV boilers, where necessary,
have means provided for drainage of
condensate.