LG Electronics 395CAV

The furnace must have a 115-v power supply properly connected

and grounded. Proper polarity must be maintained for correct

operation. Thermostat wire connections at R, W, C, and Y must be

made at the 24-v terminal block on the control board. The gas

service pressure must not exceed 0.5 psig (14-in. wc), but must be

no less than 0.16 psig (4.5-in. wc).

CAUTION: This furnace is equipped with a manual

reset limit switch or fuse link in the gas control area. The

switch or fuse link opens and shuts off power to the gas

valve if a flame rollout or overheating condition occurs in

the gas control area. DO NOT bypass the switch. Correct

inadequate combustion air supply problem and reset the

switch or replace the fuse link.

Before operating the furnace, check each manual reset switch for

continuity. If necessary, press the button to reset the switch.

The blower compartment door must be in place to complete the

115-v circuit to the furnace.

B. Sequence of Operation

CAUTION: Furnace control must be grounded for

proper operation, or control will lockout. Control is

grounded through green wire routed to gas valve and

burner bracket screw.

Using the schematic diagram shown in Fig. 11, follow the

sequence of operation through the different modes. Read and

follow the wiring diagram very carefully.

NOTE: If there is a power interruption and any thermostat call,

the control initiates a 90-sec blower only on period before starting

another cycle.

TABLE 5—ELECTRICAL DATA

UNIT SIZE VOLTS—

HERTZ—

PHASE

OPERATING

VOLTAGE RANGE MAXIMUM

UNIT AMPS MINIMUM

WIRE GAGE MAXIMUM

WIRE LENGTH (FT)‡

MAXIMUM

FUSE OR

HACR-TYPE CKT

BKR AMPS†

Maximum* Minimum*

024045 115—60—1 127 104 6.0 14 47 15

036045 115—60—1 127 104 8.3 14 34 15

024070 115—60—1 127 104 5.9 14 47 15

036070 115—60—1 127 104 8.7 14 32 15

042091 115—60—1 127 104 9.0 14 31 15

048091 115—60—1 127 104 10.4 14 27 15

036110 115—60—1 127 104 8.0 14 35 15

048111 115—60—1 127 104 10.1 14 28 15

060111 115—60—1 127 104 14.4 12 31 20

048135 115—60—1 127 104 10.1 14 28 15

060135 115—60—1 127 104 13.3 12 33 20

060155 115—60—1 127 104 14.0 12 31 20

* Permissible limits of the voltage range at which the unit operates 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.

Fig. 8—Heating and Cooling Application Wiring Diagram A95241

115-VOLT FIELD-

SUPPLIED

FUSED

DISCONNECT

AUXILIARY

J-BOX

CONTROL

BOX

24-VOLT

TERMINAL

BLOCK

THREE-WIRE

HEATING-

ONLY

FIVE

WIRE

NOTE 1

NOTE 2

FIELD-SUPPLIED

FUSED DISCONNECT

CONDENSING

UNIT

TWO

WIRE

FURNACE

WCR GY

GND

FIELD 24-VOLT WIRING

FIELD 115-, 208/230-, 460-VOLT WIRING

FACTORY 24-VOLT WIRING

FACTORY 115-VOLT WIRING

208/230- OR

460-VOLT

THREE

PHASE

208/230-

VOLT

SINGLE

PHASE

WHT

BLK

WHT

BLK

NOTES: Connect Y-terminal as shown for proper operation.

Some thermostats require a "C" terminal connection as shown.

If any of the original wire, as supplied, must be replaced, use

same type or equivalent wire.

GND

THERMOSTAT

TERMINALS

1.

2.

—8—