Carrier 58CTA Installation And Service Instructions Manual page 27

1. Heat pump MUST have a high pressure switch for dual fuel applications.
2. Refer to outdoor equipment Installation Instructions for additional information and setup procedure.
3. Outdoor Air Temperature Sensor must be attached in all dual fuel applications.
4. Dip switch No. 1 on Thermidistat should be set in OFF position for air conditioner installations. This is factory default.
5. Dip switch No. 1 on Thermidistat should be set in ON position for heat pump installations.
6. Dip switch No. 2 on Thermidistat should be set in OFF position for single-speed compressor operation. This is factory default.
7. Dip switch No. 2 on Thermidistat should be set in ON position for two-speed compressor operation.
8. Configuration Option No. 10 "Dual Fuel Selection" must be turned ON in all dual fuel applications.
9. NO connection should be made to the furnace HUM terminal when using a Thermidistat.
10. Optional connection: If wire is connected, dip switch SW1-2 on furnace control should be set in ON position to allow
Thermidistat/Thermostat to control furnace staging.
11. Optional connection: If wire is connected, ACRDJ jumper on furnace control should be removed to allow Thermidistat/Thermostat to
control outdoor unit staging.
12. When using both a two-stage furnace and a two-stage heat pump, the furnace must control its own high-stage heating operation via furnace
control algorithm.
13. The RVS Sensing terminal "L" should not be connected. This is internally used to sense defrost operation.
14. DO NOT SELECT the "FURNACE INTERFACE" or "BALANCE POINT" option on the two-speed heat pump control board. This is
controlled internally by the Thermidistat/Dual Fuel Thermostat.
15. Dip switch D on Dual Fuel Thermostat should be set in OFF position for single-speed compressor operation. This is factory default.
16. Dip switch D on Dual Fuel Thermostat should be set in ON position for two-speed compressor operation.
SETUP SWITCHES
LOW-HEAT ONLY AND
BLOWER OFF-DELAY
24-V-THERMOSTAT
TERMINALS
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX.)
3-AMP FUSE
LED OPERATION &
DIAGNOSTIC LIGHT
115-VAC (L2) NEUTRAL
CONNECTIONS
HI HEAT
LO HEAT
BLOWER SPEED
SELECTION TERMINALS
NOTES for Figures 25-31
TWINNING AND/OR
COMPONENT TEST
TERMINAL
LHT
OFF
DLY
TEST/TWIN
HUM
0.5-AMP024 VAC
FUSE 3-AMP
SEC-1 SEC-2
EAC-2 NEUTRAL-L2
BLW
BHI/LOR BHT/CLR
COOL 1-AMP@115 VAC
SPARE-1 SPARE-2 EAC-1
SPARE-1
COOL
SPARE-2
EAC-1 TERMINAL
(115-VAC 1.0 AMP MAX.)
Fig. 32—Furnace Control-PSC Blower Motor
ACRDJ - AIR CONDITIONING
RELAY DISABLE JUMPER
BLWR
PR-1
HSI HI LO
115-VAC (L1) LINE
VOLTAGE CONNECTION
25
TRANSFORMER 24-VAC
CONNECTIONS
PL1 - LOW VOLTAGE MAIN
HARNESS CONNECTOR
PL3 -ICM CONTROL
HARNESS CONNECTOR
PL2 - HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTOR
A02017