Carrier WEATHERMAKER 8000 58WAV Operations Instructions download pdf (Page 12)

Step 10—Start-Up, Adjustment, and Safety Check

GENERAL

NOTE: Proper polarity must be maintained for 115-v wiring. If

polarity is incorrect, control status indicator light will flash rapidly

and furnace will not operate.

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).

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.

SEQUENCE OF OPERATION

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. 16, 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.

Notes:

1. Heat pump must have a high pressure switch for dual fuel applications.

2. Refer to outdoor equipment Installation Instructions for proper setup.

3. Select the "zone" position on the 2-speed heat pump control.

4. Outdoor air sensor must be attached in all dual fuel applications.

5. Dip switch No. 1 on Thermidistat should be set in OFF position for air conditioner installations. This is factory default.

6. Dip switch No. 1 on Thermidistat should be set in ON position for heat pump installations.

7. Dip switch No. 2 on Thermidistat should be set in OFF position for single-speed compressor operation. This is factory default.

8. Dip switch No. 2 on Thermidistat should be set in ON position for 2-speed compressor operation.

9. Configuration Option No. 10 "Dual Fuel Selection" must be turned ON in all dual fuel applications.

10. No connection should be made to the furnace HUM terminal when using a Thermidistat.

Fig. 14—Single-Stage Furnace with 2-Speed Outdoor Unit

A99439

HUMIDIFIER

(24 VAC)

COM

TWO-STAGE

THERMOSTAT

2-SPEED

AIR CONDITIONER

OR HEAT PUMP

DHUM

HUM

See notes 1, 2, and 9.

Y/Y2

FURNACE

CONTROL

Heat Pump

only

Heat Pump only

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 23 24

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Carrier WEATHERMAKER 8000 58WAV Operations Instructions Page 12

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