Page No 14 of 52 Reznor, PREEVA Neos, Installation Manual, EN 2021-05, D301315 Iss 1
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Figure 4 - Recommended Procedure and Method for the Connection of Ducting and
Transitions to the Unit Using a Typical Proprietory Flange System
Ductwork connections
The units are designed to be used in conjunction
with intake and or discharge ducting. A positive
seal should be made between any ducting
and the air heater. A flexible connection is
desirable to eliminate transmission of noise and
to take account of thermal expansion. Figure
4 illustrates a method of connection between
the appliance and the duct using a proprietary
patented connection system.
Consideration should be given to the
application of duct fittings directly connected
to the appliance. Air inlet and outlet elbows,
transitions etc. should be designed to ensure
an unrestricted and turbulent free air flow.
This requirement is to ensure that an even air
temperature is maintained when leaving the
appliance thus eliminating heat exchanger "hot-
spots" and nuisance shutdown of the burner
due to over heating.
1. Corner jointing
framework
Cut and assemble flange into
frame to suit opening
2. Cleats between
sections to be joined
Check dimensions and
position on duct spigot
4. Checking alignment
and joint worthiness
Checking location after
positioning.
6. Sectional view of
completed joint
3. Fastening through all
members
Ensuring flange is mated correctly
before fastening.
5. Applying gasket seals to
prevent air leakage
Combustion air supply / flue arrangement
A properly sized flue system is required for safe
operation of the unit. An improperly sized flue
system can cause unsafe conditions.
The unit is designed to operate safely and
efficiently with either a horizontal or vertical flue
system when installed in accordance with the
specific requirements and instructions.
The unit may be installed as a balanced flue
(type C) heater requiring both a combustion air
inlet duct and a flue pipe or as a power vented
heater (type B) where combustion air is taken
from the space where the heater is installed and
which requires only a flue pipe exhausting to
outdoors.
Summary of Contents for PREEVA NEOS
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