Rinnai Energysaver RHFE-1004FTA, Service Manual

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76 Rinnai Direct Vent Service Manual
DIRECT VENT EXTENSION INSTALLATION REQUIREMENTS
The purpose of these instructions is to explain the correct application of the vent extension sets for the Energy
Saver direct vent furnaces.
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Two elbows can be used. Do not count the elbow attached to the unit.
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Refer to the manual for details on the maximum vent run and maximum vertical length.
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Do not allow any low points in the exhaust line.
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Termination must always be horizontal.
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The vent pipe extension must not be concealed per NFPA 54 and must be accessible allowing inspection and
repair. Decorative covers are available from Rinnai.
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The exhaust elbow assembly attached on the back of the unit SHALL NEVER be straightened.
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Do not shorten the intake air hose attached to unit from factory.
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Vent extensions ran in ANY unconditioned air space MUST be insulated with high temperature insulation and
must be accessible.
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All pipe stoppers, connectors, screws, and hangars must be used as per the directions. The seals must be air
tight for both the exhaust and the intake air supply hose.
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The intake air hose must equal the exhaust hose length to maintain a balanced flue system.
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The 431/556 Series units have a terminal block on the back that must be changed as per directions for any
extension set. This terminal block is set for direct through the wall installation and must be changed if an
extension set is used.
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The humidifier trays are made of enamel covered steel to resist rust and corrosion from the condensate
draining back to the unit. For most models the trays can be removed for cleaning but must be replaced before
operation of the unit. The 1004FA, 1004RFA, and 1004FTA tray can only be removed by a service
technician.
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Over flow of the humidifier tray is an indication that the venting extension installation directions have not been
followed and no warranty claim will be approved covering overflow.
Extension Installation Requirements