White Rodgers 8A04-1 Installation Instructions

TYPE 8A04-1

CAUTION

WHITE-RODGERS

Operator: Save these instructions for future use!

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.

The Type 8A04-1 Fan Relay is for use with low voltage thermo­stat to provide a 24 volt control circuit for operating a line voltage
fan motor or other load.

The relay has SPDT switch action to permit use with either single
or two-speed motor.

Diagrams presented on back of this sheet show various systems
that provide the required 24 volt power supply for operating the
coil of the Fan Relay.

If in doubt about whether your wiring is millivolt, line, or low
votage, have it inspected by a qualified heating and air condi­tioning contractor, electrician, or someone familiar with basic
electricity and wiring.

Do not exceed the specification ratings.
All wiring must conform to local and national electrical codes and

ordinances.
This control is a precision instrument, and should be handled

carefully. Rough handling or distorting components could cause
the control to malfunction.

FAN RELAY

24V Coil, SPDT Switch Action

INST ALLA TION INSTRUCTIONS

DESCRIPTION

PRECAUTIONS

To prevent electrical shock and/or equipment dam­age, disconnect electric power to system, at main fuse
or circuit breaker box, until installation is complete.

WARNING

Do not use on circuits exceeding specified voltages.
Higher voltages will damage control and could cause
shock or fire hazard.

ELECTRICAL DATA
Switch Action: Single-Pole, Double-Throw

Norm. Open (N.O.): Black - Red
Norm. Closed (N.C.): Black - Brown

Coil Current: 0.28A. @ 24V.A.C., 60Hz
Mounting: By means of mounting tabs or 1/2" conduit hub.
Replaces: Honeywell R8225; General R4

All wiring should be done in accordance with local and national electrical codes and ordinances.

HI

COM

LO

TYPE 8A04A-1 FAN RELAY

N.C.

N.O.

RED

PLENUM FAN SWITCH
OR OTHER SWITCHING DEVICE

BROWN

BLUE

RELAY
COIL

BLUE

BLACK

HOT

LINE

N

TWO-SPEED

MOTOR

Fig. 1 Using Type 8A04-1 with Two-Speed Motor

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.
9797 REAVIS RD., ST. LOUIS, MO. 63123
[phone], Fax [phone]

9999 HWY. 48, MARKHAM, ONT. L3P 3J3
[phone], FAX [phone]

TO 24 VOLT
CONTROL CIRCUIT

WIRING

Contacts: Silver cadmium oxide
Contact Rating:

AMPS.

N.O. N.C. N.O. N.C.
FULL LOAD 16 9.8 8 6.9
LOCKED ROTOR 96 58.8 48 41.4

TYPE 8A04-1 FAN RELAY

RED

PLENUM FAN SWITCH
OR OTHER SWITCHING DEVICE

LINE VOLTAGE
LOW VOLTAGE

HOT

LINE

N

BLACK

SINGLE-SPEED

MOTOR

Fig. 2 Using Type 8A04-1 with Single Speed Motor

Printed in U.S.A.

SPECIFICATIONS

120VAC 240VAC

WIRING

BLUE

TO 24 VOLT

RELAY

CONTROL CIRCUIT

COIL

N.C.

N.O.

BROWN

BLUE

PART NO. 37-5493A

Replaces 37-9234

9514

WIRING CONT.

All wiring should be done in accordance with local and national electrical codes and ordinances.

The diagrams given below show the use of White-Rodgers
Heating-Cooling Thermostat Combinations on various systems
that provide the required 24 volt power supply for operating the
coil (blue leads) of the Type 8A04-1 Fan Relay.

THERMOSTAT

SWITCH

COOL

Internal Wiring
Field Wiring

FAN

SWITCH

TYPE 8A04-1

FAN RELAY

AUTO ON

FAN

RELAY

COOLING

RELAY

RCG

24VAC

COOL

TRANSFORMER

SYSTEM
SWITCH

OFF

120VAC

HEAT

RHY

FIELD-INSTALLED

JUMPER

BIMETAL

COOLING

ANTICIPATOR

COOL

OFF

HEAT

HEATING

SYSTEM

HEAT

ADJUSTABLE

ANTICIPATOR

FIXED

SYSTEM
SWITCH

W

HEATING

Fig. 3 For installations where heating and cooling systems are powered by same transformer

THERMOSTAT

SUBBASE

SYSTEM

DO NOT USE JUMPER WIRE ON TWO TRANSFORMER SYSTEM

TYPE 8A04-1

FAN RELAY

G RC

FAN

RELAY

COOLING

RELAY

24VAC

COOLING

TRANSFORMER

120VAC

TRANSFORMER

120VAC

HEATING

RHY

24VAC

Fig. 4 For installations where heating systems are powered by a separate transformer

DO NOT USE JUMPER WIRE ON TWO TRANSFORMER SYSTEM

RHY WG RC

TYPE 8A04-1

FAN RELAY

FAN

RELAY

COOLING

RELAY

24VAC

TRANSFORMER

120VAC

COOLING

Fig. 5 For Oil-Fired installations using low voltage Oil Burner Control

2 37-5493B

W

HEATING

SYSTEM

SYSTEM

SYSTEM

TO T1-T2 TERMINALS

ON OIL BURNER

CONTROL TYPE 668