Carrier 59SC6A Installation Instructions Manual page 9

59SC6A: Installation, Start-up, Operating and Service and Maintenance Instructions
CAUTION
!
FURNACE CORROSION HAZARD
Failure to follow this caution may result in furnace damage.
Air for combustion must not be contaminated by halogen compounds,
which include fluoride, chloride, bromide, and iodide. These elements
can corrode heat exchangers and shorten furnace life. Air contaminants
are found in aerosol sprays, detergents, bleaches, cleaning solvents,
salts, air fresheners, and other household products.
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or death.
The operation of exhaust fans, kitchen ventilation fans, clothes dryers,
attic exhaust fans or fireplaces could create a NEGATIVE PRESSURE
CONDITION at the furnace. Make-up air MUST be provided for the
ventilation devices, in addition to that required by the furnace. Refer to
the Carbon Monoxide Poisoning Hazard warning in the venting section
of these instructions to determine if an adequate amount of make-up air
is available.
The requirements for combustion and ventilation air depend upon
whether or not the furnace is located in a space having a volume of at
Table 4 – Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors
TWO HORIZONTAL DUCTS
(1 SQ. IN./2,000 BTUh)
FURNACE INPUT
(BTUh)
Free Area of
Opening and Duct
Sq. In (Sq. mm)
26,000* 13 (8388)
40,000* 20 (12904)
30 (19355)
60,000
40 (25807)
80,000
50 (32258)
100,000
120,000 60 (38709)
140,000* 70 (45161)
*Not all families have these models.
FURNACE WATER HEATER
100,000 +
60,000 +
80,000 +
Table 5 – Minimum Space Volumes for 100% Combustion, Ventilation and Dilution Air from Outdoors
OTHER THAN FAN-ASSISTED TOTAL
AIR
(1,000'S BTUh GAS INPUT RATE)
CHANGES
PER HOUR 30
(ACH)
1,050
0.60
(29.7)
1,260
0.50
(35.6)
1,575
0.40
(44.5)
2,100
0.30
(59.4)
3,150
0.20
(89.1) (118.9)
6,300
0.10
(178.0) (237.8)
0.00 NP
NP = Not Permitted
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
(1,100 SQ. MM/KW)
Round Duct
In. (mm) Dia
4 (102)
5 (127)
6 (152)
7 (178)
8 (203)
9 (229)
10 (254)
30,000 = (130,000 divided by 4,000) =
40,000 = (100,000 divided by 3,000) =
30,000 = (110,000 divided by 2,000) =
40 50 26
1,400 1,750 910
(39.6) (49.5) (25.8)
1,680 2,100 1092
(47.5) (59.4) (30.9)
2,100 2,625 1365
(59.4) (74.3) (38.7)
2,800 3,500 1820
(79.2) (99.1) (51.5)
4,200 5,250 2730
(148.6) (77.3)
8,400 10,500 5460
(297.3) (154.6)
NP NP NP
least 50 cubic feet per 1,000 BTUh input rating for all gas appliances
installed in the space.
• Spaces having less than 50 cubic feet per 1,000 BTUh (4.8 cubic
meters per kW) require the Outdoor Combustion Air Method.
• Spaces having at least 50 cubic feet per 1,000 BTUh (4.8 cubic meters
per kW) may use the Indoor Combustion Air, Standard or Known Air
Infiltration Method.
Outdoor Combustion Air Method
1. Provide the space with sufficient air for proper combustion,
ventilation, and dilution of flue gases using permanent horizontal or
vertical duct(s) or opening(s) directly communicating with the
outdoors or spaces that freely communicate with the outdoors.
2. Fig. 6 illustrates how to provide TWO OUTDOOR OPENINGS,
one inlet and one outlet combustion and ventilation air opening, to
the outdoors.
a. One opening MUST commence within 12 in. (300 mm) of the
ceiling and the second opening MUST commence within 12 in.
(300 mm) of the floor.
b. Size openings and ducts per
c. TWO HORIZONTAL DUCTS require 1 sq. in. (645 sq. mm) of
free area per 2,000 BTUh (1,100 mm2/kW) of combined input
for all gas appliances in the space per
d. TWO OPENINGS OR VERTICAL DUCTS require 1 sq. in.
(645 sq. mm) of free area per 4,000 BTUh (550 mm2/kW) for
combined input of all gas appliances in the space per
Table 3.
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)
9 (5807) 4 (102)
14 (8696) 5 (127)
20 (13043) 5 (127)
27 (17391) 6 (152)
34 (21739) 7 (178)
40 (26087) 7 (178)
47 (30435) 8 (203)
TOTAL INPUT
32.5 Sq. In. for each two Vertical Ducts or Openings
FAN-ASSISTED TOTAL
(1,000'S BTUh GAS INPUT RATE)
40 60
3 3
Space Volume Ft (M )
1,400 1,500
(39.6) (42.5)
1,680 1,800
(47.5) (51.0)
2,100 2,250
(59.4) (63.7)
2,800 3,000
(79.2) (84.9)
4,200 4,500
(118.9) (127.3)
8,400 9,000
(237.8) (254.6)
NP NP
9
Fig. 6 and Table
Fig. 6
TWO OPENINGS OR
VERTICAL DUCTS
(1 SQ. IN./4,000 BTUh)
(550 SQ. MM/KW)
Free Area of
Opening and Duct
Sq. In (mm)
7 (4517)
10 (6452)
15 (9678)
20 (12904)
25 (16130)
30 (19355)
35 (22581)
33.3 Sq. In. for each Single Duct or Opening
55.0 Sq. In. for each two Horizontal Ducts
80 100
2,000 2,500 3,000
(56.6) (70.8) (84.9)
2,400 3,000 3,600
(67.9) (84.9) (101.9)
3,000 3,750 4,500
(84.9) (106.1) (127.3)
4,000 5,000 6,000
(113.2) (141.5) (169.8)
6,000 7,500 9,000
(169.8) (212.2) (254.6)
12,000 15,000 18,000
(339.5) (424.4) (509.2)
NP NP
4.
and Table 3.
Fig. 6 and
Round Duct
In. (mm) Dia.
3 (77)
4 (102)
5 (127)
5 (127)
6 (152)
6 (152)
7 (178)
120 140
3,500
(99.1)
4,200
(118.9)
5,250
(148.6)
7,000
(198.1)
10,500
(297.1)
21,000
(594.1)
NP NP