ICP F9MXT User Manual

Figure 7
Air for Combustion, Ventilation,
and Dilution from Indoors
CIRCULATING AIR
DUCTS
I I
I I
I I
INTERIOR
HEATED
SPACE
I I
I I
CIRCULATING AIR DUCTS
VENT
I I I
I I I
I I I
i:_ _ 1 SQIN.
_" m _ PER 1000
_: _ BTUH* IN DOOR
_ ORWALL
C_ UNCONFINED
ca SPACE
_d
O<
rr T 6" MIN (152ram)
u_ o0 (FRONT)0
zoo
z_ PER 1000
I - 12" MAX (3O5mm)
* Minimum opening size is 100 sq in. (64516 sq. mm) with
minimum dimensions of 3-in. (76mm)
1 Minimum of 3-in. (76mm) when type-B1 vent is used, Lt2F013
Combination of Indoor and Outdoor Air
1.
2.
3.
a.
b.
C.
Indoor openings shall comply with the Indoor
Combustion Air Method below and,
Outdoor openings shall be located as required in the
Outdoor Combustion Air Method mentioned previously
and,
Outdoor openings shall be sized as follows:
Calculate the Ratio of all Indoor Space volume
divided by required volume for Indoor Combustion
Air Method.
Outdoor opening size reduction Factor is one minus
the Ratio in a. above.
Minimum size of Outdoor openings shall be the size
required in Outdoor Combustion Air Method above
multiplied by reduction Factor in b. above. The
minimum dimension of air openings shall be not less
than 3-in. (80 mm).
Table 3 Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors
TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING TWO OPENINGS OR
VERTICAL DUCTS
(1 SQ. IN./2,000 BTUH) (1 SQ. IN./3,000 BTUH)
FURNACE (1,100 SQ. MM/KW) (734 SQ. MM/KW) (1 SQ. IN./4,000 BTUH)
(550 SQ. MM/KW)
INPUT
Round Round
(BTUH) Free Area of Duct Free Area of Open- Duct Free Area of Open- Round Duct
Opening and Duct In. (mm) ing and Duct In. (mm) ing and Duct In. (mm)
Sq. In (Sq. mm) Dia Sq. In (Sq. mm) Dia Sq. In (mm) Dia.
40,000* 20 (12904) 5 (127) 14 (8696) 5 (127) 10 (6452) 4 (102)
60,000 30 (19355) 6 (152) 20 (13043) 5 (127) 15 (9678) 5 (127)
80,000 40 (25807) 7 (178) 27 (17391) 6 (152) 20 (12904) 5 (127)
100,000 50 (32258) 8 (203) 34 (21739) 7 (178) 25 (16130) 6 (152)
120,000 60 (38709) 9 (229) 40 (26087) 7 (178) 30 (19355) 6 (152)
140,000" 70 (45161) 10 (254) 47 (30435) 8 (203) 35 (22581) 7 (178)
• Not all families have these models,
EXAMPLE: Determining Free Area
FURNACE WATER HEATER TOTAL INPUT
100,000 + 30,000 = (130,000 divided by 4,000)
60,000 + 40,000 = (100,000 divided by 3,000)
80,000 + 30,000 = (110,000 divided by 2,000)
= 32.5 Sq. In. for each two Vertical Ducts or Openings
= 33.3 Sq. In. for each Single Duct or Opening
= 55.0 Sq. In. for each two Horizontal Ducts
440 01 4001 04 Specificationssubjectto change without notice. 11

ICP F9MXT Specifications

General

Brand	ICP
Model	F9MXT
Category	Furnace
Language	English