Teledyne EHE - Manual (Page 9)

Hi-E2 Page 7
Figure 10. Installation of Insect Screens.
Install special
insect screen at
end of pipe
inside coupling
or elbow. Cut
to size as
necessary.
Combustion
Air Pipe
Elbow
Vent
Exhaust
Pipe
Trap
Figure 12. Condensate Drain and Trap.
Overflow
To
Disposal
Water Level
Pushed Down
Slightly
Water Level
Pulled Up
2"-3"
(50-75mm)
Condensate
From
Collector
Drain
Condensate From
Vent/Blower Drains
1/4" - 3/8"
(6-10mm)
To
Disposal
Vent
Drain
Figure 11. Condensate Drainage Components.
Collector
Drain
Trap/
Neutralizer
Blower
Drain
Plumbing vent
roof boot
A=Maximum snow accumulation level plus 12"
Figure 9. Vent and Combustion Air Terminals at Roof.
Combustion
Air Pipe
Elbow
Insect Screens
Installed
(See Fig. 10)
Vent
Exhaust
Pipe
A
A
18" min.
60" max
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 2 is installed in must be provided
with adequate ventilation. Like other gas-fired
appliances, the Hi-E
2 releases heat to its environment,
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. 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.
2H. Condensate Disposal
In a high-efficiency 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.