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Hi-E2
with the heater must be installed at the combustion air
and vent pipe openings as shown in Figure 11. Insect
screens are sized to fi t the inside of a 5" PVC pipe
fi tting. Trim them as necessary for smaller pipe sizes.
Connect the vent pipe to the heater vent collar
with an air-tight corrosion-resistant clamp. The
connection must not allow leakage of combustion
products into the space but should be removable for
service (see Figure 8).
Connect the combustion air pipe to collar of the
air fi lter box. For this combustion air pipe only, sheet
metal pipe is most convenient and can be screwed
directly to the collar. Seal the joint with silicone sealer
or similar mastic material.
Install vent piping with a continuous rise of at
least 1/4" per foot (20 mm per meter) away from the
heater. This will assure that any condensate forming in
the vent pipe will fl ow back to the heater where it can
be disposed of properly.
Support vent piping with suitable hangers so
its weight does not bear on the heater or building
penetration and so that piping joints are not strained.
Support horizontal runs at intervals no greater than
6 feet (1.82 meters), and closer if necessary to avoid
sagging. Sagging can trap condensate water and block
the vent.
Both combustion air and vent piping joints must
be sealed. Metal combustion air pipe joints should
be fastened with screws and sealed with permanent
sealer or tape. Plastic vent pipe joints must be made
with solvent cement listed for such use. Joints in 29-
®
4C
stainless steel pipe must be sealed in accordance
with its listing. Connection of combustion air and
vent piping to the heater should be serviceable — i.e.
removable for heater service.
2G-3e. Room Ventilation
The room a Hi-E
is installed in must be provided
2
with adequate ventilation. Like other gas-fi red
appliances, the Hi-E
releases heat to its environment,
2
and a room with no ventilation may become too warm.
In one-pipe installations, the normal (code-
required) provisions for combustion air also assure
reasonable ventilation of the room. In commercial
applications it is required that a two-pipe system be
used. If a two-pipe system is installed, ventilation must
be provided by other means, such as through grilles or
openings or with a small fan.
2G-3f. Inspection and Replacement of
Existing Vent System with New
Components
If the Hi-E
is being installed to replace an
2
existing pool heater, it is recommended that a new
appropriate venting system be installed with the new
heater. However, if an existing venting system must be
used, be sure to carefully inspect the venting system to
ensure that it is in good condition and continues to be
Insect Screens
Installed
(See Fig. 10)
Elbow
Combustion
Air Pipe
A=Maximum snow ac cu mu la tion level plus 12"
Figure 10. Vent and combustion air terminals at roof.
Combustion
Air Pipe
Elbow
Figure 11. Installation of insect screens.
appropriate for the Hi-E
2
are not in good and serviceable condition with new
parts before completing the pool heater installation.
2H. Condensate Disposal
In a high-effi ciency combustion process,
combustion product gases are cooled so much that
liquid water is condensed. Flow of this "condensate"
can be quite high. When pool water is very cold, as
much as two or three gallons of condensate can be
produced in an hour. Condensate is mildly acidic.
Before treatment, its "pH" is typically in the 3.5 to 6.0
range.
Handling and disposal of condensate is not
complicated, but it must be done correctly to prevent
problems or complaints. A trap/neutralizer assembly is
provided with the heater to simplify installation. This
assembly is easily installed in the base of the heater.
Figure 12 illustrates its installation and the routing of
drain tubes.
Page 7
Vent
Exhaust
Pipe
18" min.
60" max
A
A
Plumbing vent
roof boot
Vent
Exhaust
Pipe
Install special
insect screen
at end of pipe
inside coupling
or elbow. Cut
to size as nec-
es sary.
heater. Replace any parts that
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