Carrier 58SP0A Page 35 Installation, Start-Up, Operating And Service And Maintenance Instructions Download

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58SP0A/58SP1A: Installation, Start–Up, Operating and Service and Maintenance Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

1. Nominal 350 CFM/ton cooling airflow is delivered with SW1-5 and SW2-2 set to OFF.

Set both SW1-5 and SW2-2 to ON for +7% airflow (nominal 370 CFM/ton).

Set SW1-5 to ON and SW2-2 to OFF for +15% airflow (nominal 400 CFM/ton).

Set SW2-2 to ON and SW1-5 to OFF for -7% airflow (nominal 325 CFM/ton).

The above adjustments in airflow are subject to motor horsepower range/capacity.

This applies to Cooling and Low-Cooling airflow, but does not affect continuous fan airflow.

2. Maximum cooling airflow is achieved when switches SW2-6, SW2-7, SW2-8 and SW1-5 are set to ON, and SW2-2 is set to OFF.

3. All heating CFM's are when comfort/efficiency adjustment switch (SW1-4) is set to OFF

4. Ductwork must be sized for heating CFM within the operational range of ESP. Operation within blank areas of the chart is not recommended because heat operation will be above 1.0

ESP.

5. All airflows on 21" casing size furnaces are 5% less on side return only installations.

6. Side returns for 24.5" casing sizes require two sides, or side and bottom, to allow sufficient airflow at the return of the furnace.

7. Airflows over 1800 CFM require bottom return, two-side return, or bottom and side return or excessive watt draw may result. A minimum filter size of 20x25" (508 x 635 mm) is

required.

SERVICE AND MAINTENANCE PROCEDURES

Untrained personnel can perform basic maintenance functions such as

cleaning and replacing air filters. All other operations must be performed

by trained service personnel. A qualified service person should inspect

the furnace once a year.

GENERAL

These instructions are written as if the furnace is installed in an upflow

application. An upflow furnace application is where the blower is

located below the combustion and controls section of the furnace, and

conditioned air is discharged upward. Since this furnace can be installed

in any of the 4 positions (see

Fig. 4

), you must revise your orientation to

component location accordingly.

ELECTRICAL CONTROLS AND WIRING

The electrical ground and polarity for 115-v wiring must be properly

maintained. See

Fig. 25

for field wiring information and

Fig. 44

for

furnace wiring information.

NOTE:

If the polarity is not correct, the STATUS LED on the control

will flash rapidly , and prevent the furnace from heating. The control

system also requires an earth ground for proper operation of the control

and flame-sensing electrode.
The 24-v circuit contains an automotive-type, 3-amp. fuse located on the

control, see

Fig. 27

. Any shorts of the 24-v wiring during installation,

service, or maintenance will cause this fuse to blow. If fuse replacement

is required, use ONLY a 3-amp. fuse. The control LED will display

status code 24 when fuse needs to be replaced.
Proper instrumentation is required to service electrical controls. The

control in this furnace is equipped with a Status Code LED

(Light-Emitting Diode) to aid in installation, servicing, and

troubleshooting. Status codes can be viewed at the sight glass in blower

access door. The amber furnace control LED is either ON continuously,

rapid flashing, or a code composed of 2 digits. The first digit is the

number of short flashes, the second digit is the number of long flashes.
For an explanation of status codes, refer to service label located on

blower access door (or see

Fig. 43

See the brief Troubleshooting Guide (

Fig.

The stored status codes will NOT be erased from the control memory,

when 115- or 24-v power is interrupted. The control will store up to the

last 7 Status Codes in order of occurrence.

1. To retrieve status codes, proceed with the following:

NOTE:

NO thermostat signal may be present at control, and all

blower-OFF delays must be completed.

a. Leave 115-v power to furnace turned on.
b. Remove outer access door.
c. Look into blower access door sight glass for current LED status.
d. Remove blower access door.

NOTE:

The Status Codes cannot be retrieved by disconnecting the limit

switch or draft safeguard switch. To retrieve Status Codes, follow the

procedure below.

2. Turn Setup Switch, SW1-1 “ON.”

WARNING

FIRE, INJURY OR DEATH HAZARD

Failure to follow this warning could result in personal injury, death

and/or property damage.

The ability to properly perform maintenance on this equipment requires

certain knowledge, mechanical skills, tools, and equipment. If you do

not possess these, do not attempt to perform any maintenance on this