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18 | Installation instructions
WARNING:
▶ Single pipe penetration should be used in non-
freezing climates only and steps must be taken to
ensure that adequate combustion air is available to
the water heater at all times!
Fig. 15 Horizontal venting system (concentric vent)
[1]
Exhaust
[2]
Combustion air
[3]
Exhaust pipe
[4]
Drain tee (when required)
[5]
Intake pipe
[LA] Minimum 1"
NOTICE:
▶ The air intake connection on the concentric
termination can be oriented in any possible
direction.
Fig. 16 Horizontal parallel venting system (twin pipe direct vent)
[A]
3 ft minimum
6 720 805 440 (2014/11)
Fig. 17 Horizontal venting system (single pipe penetration)
[1]
Exhaust pipe
[2]
Intake pipe
[LA] Minimum 4"
NOTICE: Risk of appliance freezing!
▶ Single pipe penetration should be used in non-
freezing climates only and steps must be taken to
ensure that adequate combustion air is available to
the water heater at all times!
4.3.4
Vent connections for PP, PVC, CPVC, and ABS systems
Attaching the exhaust and air inlet connection adaptors to the top of
the heater
▶ Attach the flue gas exhaust accessory to the top of the unit fig. 18
(position 1) using the 4 screws and gasket provided, and fully insert
vent pipe into the accessory. If using 4" venting, a 3" to 4" increaser
should be installed directly after this accessory. If using 2" venting, a
3" to 2" reducer should be installed directly after this accessory. If
using the PP twin pipe system, adapters from the appliance adapter
(3" PVC compatible) to the PP system are needed.
NOTE: Vent pipe must be completely vertical when
inserting or blue gasket inside exhaust accessory can
become displaced. Exhaust accessory can be removed
with vent pipe attached to check gasket position.
Fig. 18 Exhaust connection
Greentherm
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