Carrier 58BB - Manual (Page 5)

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WIRING — Fig. 4 shows the printed circuit control
center, which is factory-installed on heating/
cooling furnaces. Fig. 5 illustrates the field power
and control wiring for heating only furnaces; Fig. 6
illustrates the field power and control wiring for
the heating/coohng models.
When wiring units, make sure that all national
and local codes are followed. Check against loose
wiring connections.
When making aluminum conductor connections
to copper conductors or terminals, use only con­
nectors which are UL approved for the application.
(UL approved connectors will be tin plated, have
separator bars for placement between conductors
to prevent direct contact between aluminum and
copper, and have large bearing surfaces to minimize
unit pressures for minimum cold flowing of the
aluminum and subsequent loosening of the joint.)
After insulation has been stripped from alumi­
num conductor, coat conductor end with corrosion
inhibitor (Burndy “Penetrox A” or equivalent),
and wire brush aluminum surface thru inhibitor.
After cleaning, recoat aluminum conductor
with inliibitor, and make up connection. (Coat
entire connection.)
If applicable, wrap connection for moisture
andjor electrical protection.
Field Power Wiring — (See Fig. 5 and Fig. 6.)
Heating Only Models
1. Connect separate 115-volt, single-phase, 60-Hz
power supply thru hole in side of unit casing to
115-volt pigtails.
2. If required by local codes, install fuse and
manual switch between main box and furnace.
Heating/Cooling Models
(With Printed Circuit Control Center)
1. Connect separate 115-volt, single-phase, 60-Hz
power supply to terminals Lj and L2 on the
printed circuit control center. (See Fig. 4.)
2. If required by local codes, install fuse and
manual switch between main box and furnace.
3. When adding an electronic air cleaner to the
system, connect air cleaner to terminals EACi
and EAC2. These terminals supply 115-volt
power to the electronic unit.
4. When adding a line-voltage humidifier to the
system, connect humidifier to terminals HUi
and HU2.
Humidifier has its own control wiring, which is
independent of the furnace, except for the
power connections provided at HUj and HU2-
5. When replacing a single-speed motor with a
dual-speed motor, be sure to remove jumper
between HI and LO on the control center.
LOW VOLTAGE
TERMINAL STRIP
HUMIDIFIER
RELAY
RECEPTACLE
(SEE NOTE 2)
40-VA TRANSFORMER
(STANDARD
COMPONENT)
PLUG-IN
BLOWER
RELAY
(STANDARD
COMPONENT)
LINE VOLTAGE
CONNECTIONS
NOTES:
1 All factory-wired connections are !4~in quick-connect terminals:
all field-connection points are screw terminals.
2 Optional component, humidifier relay, is plugged into receptacle
HR when low voltage humidifier is added to system.
Fig. 4 — Printed Circuit Control Center,
Cover Removed
Field Control Wiring — (See Fig. 5 and Fig. 6.)
Heating Only Models
1. Connect two 24-volt leads from accessory
thermostat to low-voltage pigtails R and W.
2. For constant fan operation, turn summer
switch, located on the furnace junction box, to
the “On” position.
Heating/Cooling Models
(With Printed Circuit Control Center)
1. For heating with constant fan control, connect
leads from room thermostat subbase to ter­
minals W, G, and R on the low voltage
terminal strip. (See Fig. 4.) This hook-up is
used when heating only with manual fan
control at the thermostat is desired.
2. Connect accessory thermostat to furnace and
cooling unit. Connect terminals W, G, R and Y
on the thermostat subbase to identically labeled
terminals on the low voltage terminal strip.
Connect yellow and black low voltage leads
from the remote condensing unit to the two C
terminals on the low voltage terminal strip.