Rinnai I Series, Installation And Operation Manual

Page: 22 / 136

22 Rinnai I - Series Condensing Boiler Combi Manual
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.
Check to determine whether local codes
supersede the following clearances:
•
Avoid termination locations near a dryer
vent.
•
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.
Vent Screen
•
Press vent screen inside of
termination piece/elbow.
•
Secure vent screen to the
elbow with screw.
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.