Rinnai REU-N2024FF-US, Installation And Operation Manual

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18 Rinnai Tankless Water Heater Installation and Operation Manual
1. Install the water heater.
2. Determine the termination method—horizontal or vertical , concentric, or twin pipes, etc.
3. Determine proper location for wall or roof penetration for each termination.
4. Install termination assembly as described in this manual or in the vent manufacturer ’ s installation instructions.
5. Install air and vent piping from water heater to termination.
6. Slope horizontal exhaust run towards the water heater 1/4 in. per foot. DO NOT slope combustion air pipe
towards water heater.
7. Install vent supports and brackets allowing for movement from expansion, or as per vent manufacturer ’ s
instructions or local code requirements.
8. Install vent screen (supplied with water heater) on PVC combustion air and exhaust termination elbows as
illustrated below.
•
Press vent screen inside of termination piece/elbow.
•
Secure vent screen to the elbow with screw provided.
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.
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 part of
the termination.
Venting Installation Sequence
Termination Considerations