Carrier 58TMA operating instructions ElectricalData, SetupSwitch Description

Table 6—Electrical Data

UNIT	VOLTS—	OPERATING		MAX	MIN	MAX WIRE	MAX FUSE OR
	HERTZ—	VOLTAGE RANGE		UNIT	WIRE	LENGTH	HACR-TYPE
SIZE
	PHASE	Max*	Min*	AMPS	GAGE	FT‡	CKT BKR AMPS†
065-08	115—60—1	127	104	8.0	14	46	15
065-12	115—60—1	127	104	10.5	14	35	15
085-12	115—60—1	127	104	12.0	14	30	15
085-16	115—60—1	127	104	14.2	14	26	15
105-16	115-60-1	127	104	13.2	14	29	15
105-20	115—60—1	127	104	17.2	12	33	20
125-20	115—60—1	127	104	17.9	12	32	20

*Permissible limits of the voltage range at which the unit will operate satisfactorily.

† Time-delay fuse is recommended.

‡ Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.

FIELD 24-V WIRING￿

FIELD 115-, 208/230-, 460-V WIRING￿ FACTORY 24-V WIRING￿ FACTORY 115-V WIRING

1-STAGE THERMOSTAT TERMINALS

FIVE￿ WIRE￿

W Y R G C

FIELD-SUPPLIED￿ FUSED DISCONNECT

		TWO-WIRE￿				208/230- OR￿
		HEATING-￿
		ONLY				460-V￿
						THREE￿
BLK	BLK		W2			PHASE
WHT	WHT		COM
			W/W1			208/230-V￿
	GND					SINGLE￿
115-V FUSED￿		JUNCTION￿	Y/Y2			PHASE
DISCONNECT￿		BOX	R			GND
	SWITCH￿	CONTROL￿				CONDENSING￿
(WHEN REQUIRED)		BOX	G￿
						UNIT
			24-V￿
		TERMINAL￿
		BLOCK		NOTES:	1.	Connect Y-terminal as shown for proper operation.￿
		FURNACE		￿	2. Some thermostats require a "C" terminal connection as shown.￿
					3. If any of the original wire, as supplied, must be replaced,￿
						use same type or equivalent wire.

A97443

→Fig. 15—Heating and Cooling Application Wiring Diagram With 1-Stage Thermostat and Condensing Unit

This furnace can be installed with either single-stage heating or 2-stage heating thermostat.

For single-stage thermostats, connect thermostat W to W/W1 at furnace control terminal block. (See Fig. 15.) For single-stage thermostats the control determines, based on length of previous heating on and off cycles, when to operate in low- and high-gas heat for optimum comfort. Setup Switch-2 (SW-2) must be in the factory-shipped OFF position. See Fig. 17 and Tables 6 and 7 for setup switch information.

If 2-stage heating thermostat is to be used, move SW-2 to ON position at end of furnace installation. This overrides built-in control process for selecting high and low stage and allows 2-stage thermostat to select gas heating modes. The W2 from thermostat must be connected to W2 on control terminal block. (See Fig. 16.)

Before operating furnace, check each manual reset switch for continuity. If necessary, press and release button to reset switch.

Table 7—Setup Switch Description

SETUP	NORMAL	DESCRIPTION OF USE
SWITCH NO.	POSITION
		Turn switch on to obtain only
	OFF	high-gas-heat operation on
SW-1		any call for heat regardless of
	(Staged Gas
Only High-Gas Heat		whether R-W/W1, or R-W/W1,
	Heat)
		-W2 is closed. SW-1 overrides
		SW-2.
		Turn switch off for installations
		with single-stage thermostats;
		control selects low-gas-heat
		or high-gas-heat operation
SW-2	OFF	based on previous cycles.
		Turn switch on for installations
Low-Gas Heat	(Single-Stage
		with 2-stage thermostats to
(Adaptive Mode)	Thermostat)
		permit only low-gas-heat op-
		eration in response to closing
		R-W/W1. High-gas heat is
		supplied only when R to
		W/W1 and W2 is closed.
SW-3 and		Switches control gas heating
	ON, OFF	blower off delay. (See Table
SW4
		8.)

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