Allied 95G1DFE, Руководство по установке

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507277-02 Page 18 of 52 Issue 1621
Intake Piping
This furnace may be installed in either direct vent or non-
direct vent applications. In non-direct vent applications,
when intake air will be drawn into the furnace from the
surrounding space, the indoor air quality must be considered.
Guidelines listed in Combustion, Dilution and Ventilation Air
section must be followed.
Follow the next two steps when installing the unit in Direct
Vent applications , where combustion air is taken from
outdoors and flue gases are discharged outdoors. The
provided air intake screen must not be used in direct
vent applications (outdoors).
1. Use cement or a sheet metal screw to secure the intake
pipe to the inlet air connector.
2. Route piping to outside of structure. Continue with
installation following instructions given in general guide
lines for piping terminations and intake and exhaust
piping terminations for direct vent sections. Refer to
Table 7 for pipe sizes.
Follow the next two steps when installing the unit in Non-
Direct Vent applications where combustion air is taken
from indoors and flue gases are discharged outdoors.
1. Use field-provided materials and the factory-provided
air intake screen to route the intake piping as shown in
Figure 25. Maintain a minimum clearance of 3” (76 mm)
around the air intake opening. The air intake opening
(with the protective screen) should always be directed
forward, or sideways.
2. If intake air is drawn from a ventilated aittic (Figure 25
or ventilated crawlspace (Figure 26 the exhaust vent
length must not exceed those listed in Table 8. If 3”
diameter pipe is used, reduce to 2” diameter pipe at the
termination point to accommodate the debris screen.
3. Use cement to secure the intake pipe to the connector,
if desired.
AIR
INTAKE
SCREEN
(Provided)
NOTE:
Air intake screen and elbow may be rotated, so that
screen may be positioned to face forward or to either side.
Typical Air Intake Pipe Connections
Non-Direct Vent Applications
Figure 24
General Guidelines for Vent Terminations
In Non-Direct Vent applications, combustion air is taken from
indoors and the flue gases are discharged to the outdoors.
This unit is then classified as a non-direct vent, Category
IV gas furnace.
Typical Air Intake Pipe Connections
Non-Direct Vent Applications
NOTE: Air intake screen and elbow may be rotated, so that screen
may be positioned to face forward or to either side.
Figure 25
Figure 26