Carrier 59SP6A Installation, Start-Up, Operating, Service And Maintenance Instructions page 10

59SP6A: Installation, Start-up, Operating, Service and Maintenance Instructions
Table 3 – Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors
TWO HORIZONTAL DUCTS
FURNACE INPUT
(BTUH)
Free Area of
Opening and Duct
Sq. In (Sq. mm)
40,000* 20 (12904)
60,000 30 (19355)
80,000 40 (25807)
100,000 50 (32258)
120,000 60 (38709)
140,000* 70 (45161)
*Not all families have these models.
EXAMPLES: Determining Free Area
FURNACE WATER HEATER
100,000 + 30,000
60,000 + 40,000
80,000 + 30,000
Table 4 – Minimum Space Volumes for 100% Combustion, Ventilation and Dilution Air from Outdoors
OTHER THAN FAN-ASSISTED TOTAL
(1,000'S BTUH GAS INPUT RATE)
30
ACH
1,050 (29.7)
0.60
0.50 1,260 (35.6)
1,575 (44.5)
0.40
2,100 (59.4)
0.30
0.20 3,150 (89.1)
6,300 (178.0) 8,400 (237.8)
0.10
NP
0.00
NP = Not Permitted
*Minimum dimensions of 3‐in. (76mm)
NOTE: Use any of the following combinations of openings:
A & B, C & D, D & E, F & G
Fig. 6 – Air for Combustion, Ventilation, and Dilution for Outdoors
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
(1 SQ. IN./2,000 BTUH)
(1,100 SQ. MM/KW)
Round Duct
In. (mm) Dia
5 (127)
6 (152)
7 (178)
8 (203)
9 (229)
10 (254)
TOTAL INPUT
= (130,000 divided by 4,000)
= (100,000 divided by 3,000)
= (110,000 divided by 2,000)
40 50
1,750
1,400 (39.6)
(49.5)
2,100
1,680 (47.5)
(59.4)
2,625
2,100 (59.4)
(74.3)
3,500
2,800 (79.2)
(99.1)
5,250
4,200 (118.9) 4,200 (118.9) 4,500 (127.3) 6,000 (169.8) 7,500 (212.2) 9,000 (254.6)
(148.6)
10,500
8,400 (237.8) 9,000 (254.6)
(297.3)
NP NP
SINGLE DUCT OR OPENING
(1 SQ. IN./3,000 BTUH)
(734 SQ. MM/KW)
Free Area of
Round Duct
Opening and Duct
In. (mm) Dia
Sq. In (Sq. mm)
14 (8696) 5 (127)
20 (13043) 5 (127)
27 (17391) 6 (152)
34 (21739) 7 (178)
40 (26087) 7 (178)
47 (30435) 8 (203)
= 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
(1,000'S BTUH GAS INPUT RATE)
40 60
Space Volume Ft3 (M3)
1,400 (39.6) 1,500 (42.5) 2,000 (56.6)
1,680 (47.5) 1,800 (51.0) 2,400 (67.9)
2,100 (59.4) 2,250 (63.7) 3,000 (84.9) 3,750 (106.1) 4,500 (127.3) 5,250 (148.6)
2,800 (79.2) 3,000 (84.9) 4,000 (113.2) 5,000 (141.5) 6,000 (169.8) 7,000 (198.1)
NP NP
* Minimum opening size is 100 sq in. (64516 sq. mm) with
minimum dimensions of 3‐in. (76mm)
{ Minimum of 3‐in. (76mm) when type‐B1 vent is used.
L12F012
Fig. 7 – Air for Combustion, Ventilation, and Dilution from Indoors
10
TWO OPENINGS OR
VERTICAL DUCTS
(1 SQ. IN./4,000 BTUH)
(550 SQ. MM/KW)
Free Area of
Opening and Duct
Sq. In (mm)
10 (6452)
15 (9678)
20 (12904)
25 (16130)
30 (19355)
35 (22581)
FAN-ASSISTED TOTAL
80 100
2,500 (70.8) 3,000 (84.9)
3,000 (84.9) 3,600 (101.9) 4,200 (118.9)
12,000 15,000
(339.5) (424.4) (509.2)
NP NP
Round Duct
In. (mm) Dia.
4 (102)
5 (127)
5 (127)
6 (152)
6 (152)
7 (178)
120 140
3,500 (99.1)
10,500
(297.1)
18,000 21,000
(594.1)
NP NP
L12F013