Carrier 58DP User Manual
58DP,DR
HEATING A COOLING
Downflow Gas-Fired Natural-Draft Furnaces
Installation, Start-Up and Service
Instructions
NOTE: Read the entire instructions before starting the
installation.
NOTE: The Energy Guide tag can be removed from the fur
nace when the installation is complete.
INTRODUCTION
Before installing the furnace, refer to “Procedures for
Natural-Draft Gas-Fired Furnaces” (packaged with the
equipment) for information concerning combustion, venting,
piping, and other standard installation practices. Further
reference is made to the current edition of the National Fuel
Gas Code NFPA No. 54, T1A-54-1984-1/ANSI Z223.1-1984,
Z223.1a-1987.
Each furnace is shipped from the factory completely assem
bled with multispeed direct-drive blower and wired ready for
downflow indoor heating installation only. AU sizes feature
a printed-circuit board control center with easy-to-read, lowvoltage terminal strip to ensure proper connections.
A CAUTION
Do not install furnace in a damp, corrosive, or contami
nated atmosphere. Make sure all combustion and circu
lating air requirements listed in “Procedures for
Natural-Draft Gas-Fired Furnaces” are adhered to, in
addition to all local codes and ordinances.
Do not use this furnace during construction when adhe
sives, sealers and/or new carpets are being installèd. If
the furnace is required during construction, use clean
outside air for combustion and ventilation. Compoxmds
of chlorine and fluorine when burned with combustion
air form acids which will cause corrosion of the heat
exchangers and metal vent system. Some of these com
pounds are paneling and dry wall adhesives, paints,
thinners, masonry cleaning materials, and many other
solvents commonly used in the construction process.
The design of the downflow gas-flred furnace is A.G.A. cer
tified for installation on noncombustible flooring. The fur
nace may be installed on combustible flooring when
installed with the accessory floor base. This furnace is for
installation in alcoves, basements, closets, or utility rooms.
This furnace line is not A.G.A. design certified for installa
tion in a mobile home, recreation vehicle, or outdoors.
Installation comprises the following:
*1. Inspection
*11. Location, Ventilation, and Air for Combustion
*III. Gas Piping
*IV. Venting
V. Supply-Air Plenum Installation
VI. Electrical
EFFICIENCY
RATING
CERTIFIED
a
Sizes 050 075 thru 150
Sides—Single-Wall Vent 1 1
Back 0 0
Top of Plenum
Vent Connector—Single-Wall 6 6
Front-Combustion Air* * 6 6
*The 6-inch front clearance is needed for combustion-air entry and
drafthood reiief.
ama
Fig. 1—Model 58DP
Table 1—Clearances (In Inches)
Type-BI Double-Wall Vent 0 1
1 1
Type-B1 Double-Wall 1 1
Service 30 30
A78593
VII. Sequence of Operation
VIII. Filter
IX. Startup and Adjustment
X. Care and Maintenance
*To perform these sections (or installation steps), refer to
the appropriate sections of “Procedures for Natural-Draft
Gas-Fired Furnaces” booklet packaged with this unit.
For accessory installation details, refer to the applicable
installation literature.
V. SUPPLY-AIR PLENUM INSTALLATION
A. Installation on a concrete slab
1. See Fig. 2 for dimensions and location of supply-air
opening in furnace bottom.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
'' I ^ PC 101 Cataiog No. 535-871 Printed in U.S.A. Form 58DP,DR-2SI 11/87
Tab I6al8a
Pgl
Repiaces: 58DP,DR-1Si
Table 2—Dimensions (in Inches)
Size Vent
050-BA
075-AA
075-BA
100-AA 17’¿
100-BA
125-AA 21
125-BA
150-BA
14^16 12^,6
M'h
M'k
177^
21
24’¿
15%
157s
15%
15%
19%
19%
22'%s
12-’-’/i6
16 4
16 4
16 5
16
19% 5
19%
23
Fig. 2—Dimensionai Drawing
Table 3—Ratings and Performance*
Size
050-BA
075-AA
075-BA
100-AA
100-BA
125-AA
125-AA
150-BA
*The above ratings are certified for aititudes to 2000 ft. For elevators above 2000 ft, reduce ratings 4% for each 1000 ft above sea level. Refer to'
National Fuel Gas Code Table F4.
fDetermined by U.S. Government tests.
ijrDeduct 1000 Btuh for Model 58DR.
Input
Btuh
50,000 39,000f
75,000 58,000
100,000 78,000t
125,000 97,000f
150,000
Capacity
Btuht
116,000f
Temp
Rise
Range
45—75 0.50
70—100 0.12
45—75 0.50 895
70—100 0.20 850
60—90 0.50
70—100 0.20
60—90
55—85 0.50 1535
Ext Static
Pressure
0.50
Heating
CFM
Ext Static
600 0.5 800 %-SP
630
960 0.5 1630 %-PSC
1050
1195 0.5 1620 'k-PSC 187
Cooling Motor
Pressure
— —
0.5 1255 %-SP 157
— —
0.5 2075 %-PSC
CFM
—
HP&
Type
7io-SP
%-SP
'h-SP
2. Construct hole in floor per dimensions in Fig. 3 and
Table 4.
3. Place plenum and furnace as shown in Fig. 4.
B. Installation on a combustible floor
1. Read Installation Instructions packaged with acces
sory combustible floor base.
2. Cut and frame hole in floor per dimensions hsted in
Installation Instructions packaged with combustible
floor base. If this requires cutting of a floor joist, tie
ends of cut joist into adjacent joists so that proper
floor support win be maintained.
3. Assemble and install combustible floor base per
instructions packaged with base.
4. When completed, combustible floor base, plenum, and
furnace (or coü casing when used) should be installed as
shown in Fig. 6.
A73382
4
5
5
6
Approx
Shipping
Weight
129
148
163
170
187
227
Fig. 3—Floor Opening for
Concrete Slab
Table 4—Opening Dimensions
Furnace Casing
Width
14%6
17%
21
24%
♦These dimensions apply when a Model 28RC or RD Evaporator Coil
casing is to be installed.
A B
13% 19%
16%6
19% 19%
23%6
Heat-Only Heat/Cool*
19%
19%
19%6
19%s
19%6
19%6
—2—
Fig. 5—Combustible Floor Base
A WARNING
The cabinet must have an uninterrupted or unbroken
ground according to National Electrical Code, ANSI/
NFPA 70-1987, or local codes to minimize personal
injury if an electrical fault should occur. This may con
sist of electrical wire or conduit approved for electrical
ground when installed in accordance with existing elec
trical codes. Do not use gas piping as an electrical
ground. A failure to adhere to this warning can result in
an electrical shock, fire, or death.
If line-voltage wiring to the unit is encased in a nonmetallic
sheath, connect the incoming ground wire to the grounding
wire inside the furnace J-box. If metallic conduit is used, it
will serve as the ground.
B. Low-Voltage Wiring
Make field low-voltage connections at the low-voltage termi
nal strip. See Fig. 9.
NOTE: Use AWG No. 18 “color-coded” copper thermostat
wire for lengths up to 100 ft. Above 100 ft, use AWG No. 16
wire.
Fig. 6—Furnace, Plenum, and
Base Installed on a Combustible Floor
VI. ELECTRICAL CONNECTIONS
A. Line-Voltage Wiring
NOTE: Refer to “Procedures for Natural-Draft Gas Fur
naces” (packaged with the equipment) for additional
information.
A CAUTION
Do not connect aluminum wire between disconnect
switch and furnace.
See Fig. 9 for wiring diagram showing the proper field high-
and low-voltage wiring.
Use a separate fused branch electrical circuit containing a
properly sized fuse or HACR-type circuit breaker for this
furnace. A disconnecting means must be located within
sight from, and readily accessible to, the furnace. In some
areas, the unit door switch may qualify as the disconnecting
means.
Fig. 7—Amp Draw Check With Ammeter
mSm
A79077
Fig, 8—Printed-Circuit Control Center
—3—
A78461.
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