Supply-Air Connections; Return-Air Connections - Carrier WEATHERMAKER 8000 58ZAV Installation And Operating Instructions Manual

RETURN
AIR
INTERIOR
HEATED
SPACE
SUPPLY AIR
* Minimum opening size is 100 sq in. with
minimum dimensions of 3 in.
† Minimum of 3 in. when type B-1 vent is used.
Fig. 3—Confined Space: Air for Combustion and
Ventilation from an Unconfined Indoor Space
AIR FROM UNCON-
FINED INDOOR
58ZAV
SPACE
FURNACE
INPUT
Free Area
(BTUH)
of Opening
(Sq In.)
46,000 100
69,000 100
92,000 100
115,000 115
135,000 135
* Free area shall be equal to or greater than the sum of the areas of all vent connectors in the confined space. Opening area must be increased if other gas appliances
in the space require combustion air.
Step 3—Supply Air Connections
DOWNFLOW FURNACES
Connect supply-air duct to supply-air opening on furnace. The
supply-air duct attachment must ONLY be connected to furnace
supply/outlet or air conditioning coil casing (when used), when
installed on non-combustible material. When installed on combus-
tible material, supply-air duct attachment must ONLY be con-
nected to an accessory subbase or factory approved air condition-
ing coil casing. DO NOT cut main furnace casing to attach supply
side air duct, humidifier, or other accessories. All accessories
MUST be connected external to furnace main casing.
HORIZONTAL FURNACES
Connect supply-air duct to supply air opening on furnace. The
supply-air duct attachment must ONLY be connected to furnace
VENT THROUGH ROOF
(CATEGORY I)
12" MAX
1 SQ IN.
PER 1000
BTUH * IN DOOR
OR WALL
UNCONFINED
SPACE
6 " MIN
(FRONT) †
1 SQ IN.
PER 1000
BTUH * IN DOOR
OR WALL
12" MAX
Table 2—Minimum Free Area Of Combustion Air Opening
OUTDOOR AIR THROUGH
VERTICAL DUCTS
Free Area of
Opening and Duct
(Sq In.)
11.50
17.25
23.00
28.75
33.75
OUTDOORS
12 " MAX
1 SQ IN.
PER 2000
BTUH *
DUCTS
TO
OUTSIDE
1 SQ IN.
PER 2000
BTUH *
12 " MAX
SUPPLY AIR
* Minimum dimensions of 3 in.
NOTE: Use any of the following
combinations of openings:
A & B
A93387
Fig. 4—Confined Space: Air for Combustion and
Ventilation from Outdoors
OUTDOOR AIR THROUGH
HORIZONTAL DUCTS
Round Free Area of
Pipe Opening and Duct
(In. Dia) (Sq In.)
4 23.0
5 34.5
6 46.0
7 57.5
7 67.5
supply/outlet or air conditioning coil casing (when used). DO NOT
cut main furnace casing to attach supply side air duct, humidifier,
or other accessories. All accessories MUST be connected external
to furnace main casing.
Step 4—Return Air Connections
The return-air duct must be connected to return-air opening
provided as shown in Fig. 1. DO NOT cut into casing sides or back
to attach any portion of return-air duct. Bypass humidifier connec-
tions should be made at ductwork or coil casing sides exterior to
furnace.
6
DUCTS TO
D
RETURN
A
VENT
AIR
THROUGH
ROOF
(CATEGORY I)
E
B
C
12 " MAX
DUCT
TO
OUTDOORS
C & D D & E F & G
OUTDOOR AIR THROUGH
SINGLE DUCT
Round Free Area of
Pipe Opening and Duct
(In. Dia) (Sq In.)
6 15.33
7 23.00
8 30.67
9 38.33
10 45.00
1 SQ IN.
PER 4000
BTUH *
12"
MAX
F
1 SQ IN.
PER 4000
BTUH *
OUTDOORS
1 SQ IN.
PER 4000
BTUH *
G
12"
MAX
1 SQ IN.
PER 4000
BTUH
A93388
Round
Pipe
(In. Dia)
5
6
7
7
8