resideo Fan Relays R4225A,B and R8225A-D Installation Guide
- June 7, 2024
- resideo
Table of Contents
Fan Relays
R4225A,B, AND R8225A-D
INSTALLATION INSTRUCTIONS
APPLICATION
The R4225 Fan Relays provide line voltage control of line voltage fan
motors and auxiliary circuits in heating, cooling, and heating-cooling
systems. The R8225 Fan Relays provide a low voltage (24 V) control of line
voltage fan motors and auxiliary circuits in heating, cooling, and heating-
cooling
systems.
- One-half inch conduit spud fitting for mounting on a junction box
- Color-coded lead wires for easier wiring.
- Totally enclosed for long, trouble-free service life.
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not include normal
manufacturing tolerances. Therefore, this unit may not match the listed
specifications exactly. Also, this product is tested and calibrated under
closely controlled conditions, and some minor differences in performance can
be expected if those conditions are changed.
Models:
R4225A Fan Relay: SPDT switching; one normally open and one normally closed
contact.
R4225B Fan Relay: SPST switching; normally open contacts.
R8225A Fan Relay: SPDT switching; one normally open and one normally closed
contact.
R8225B Fan Relay: SPST switching; normally open contacts.
R8225C Fan Relay: DPST switching; one normally open and one normally closed
contacts.
R8225D Fan Relay: DPST switching; one normally open main and one normally open
auxiliary pole.
Electrical Ratings:
| Contacts | 120 Vac | 240 Vac |
|---|---|---|
| Normally Open | 3/4 hp. | 1 hp. |
| 14 AFL | 8 AFL | |
| 84 ALR | 48 ALR | |
| 16 A Res | 8 A Res. | |
| Normally Closed | 3/4 hp. | 3/4 hp. |
| 14 AFL | 7 AFL | |
| 84 ALR | 42 ALR | |
| 10 ARes | 7 A Res. | |
| Auxiliary | 1/10 hp. | 1/8 hp. |
| 3 AFL | 2 AFL | |
| 18 ALR | 12 ALR | |
| 3 A Res. | 2 A Res. |
AFL: Amperes Full Load
ALR: Locked Rotor
Res.: Resistive
Coil Characteristics:
Coil
Voltage| Inrush| Sealed| Pull-in Voltage| Max. Wattage
---|---|---|---|---
24 V| 11 VA| 6 VA| 18 V| 3.0
120V| 44 VA| 24 VA| 90V| 2.7
240 V| 88 VA| 48 VA| 180 V| 2.7
Contacts:
Silver cadmium oxide.
Maximum Ambient Operating Temperature:
115 F (46 C).
Case:
Molded plastic with steel mounting plate.
Mounting Means:
Mounts to standard 1/2 in. knockout or optional mounting bracket (Fig. 2) with
1/2 in. (12.7 mm) mounting spud.
Approval Bodies:
Underwriters Laboratories Inc. Listed: R4225A,B; R8225A-D; File No. E14480,
Guide No. NLDX.
Canadian Standards Association: R4225A,B; R8225A-D; File No. 1620.
INSTALL ATION
When Installing this Product…
- Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
- Check ratings given in the instructions and on the product to make sure the product is suitable for your application.
- The installer must be a trained, experienced service technician.
- After installation is complete, check out product operation as provided in these instructions.
CAUTION
Disconnect power supply before beginning wiring to prevent electrical shock or
equipment damage.
Location and Mounting
The R4225A, B/R8225A-D Fan Relays may be mounted in any convenient position.
Choose a location where the maximum ambient operating temperature for the unit
will not be exceeded. The relays have a 1/2 in. (12.7 mm) conduit spud for
mounting a junction box.
To mount, remove the conduit spud nut and place the spud through the knockout
in the junction box or hole in the flush mounting bracket (if used). Replace
the nut and tighten. Drill a hole in the mounting surface and secure the relay
in place using a screw through the tab of the mounting plate. See Fig. 1 for
mounting dimensions.
Wiring
Disconnect power supply before beginning installation to prevent electrical
shock or equipment damage.
All wiring must comply with local electrical codes and ordinances. Refer to
manufacturer’s instructions whenever possible, or refer to Figs. 3-6 for
typical hookups. Control wiring on the R4225 is routed through conduit spud.
Control circuit (coil) wires for all fan relays are routed through the side of
the plastic relay case.
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
CONTROL CIRCUIT INCLUDES APPROPRIATE VOLTAGE POWER SUPPLY, THERMOSTAT, AND
SAFETY DEVICES (IF USED). R4225 REQUIRES A LINE VOLTAGE CONTROL CIRCUIT. R8225
REQUIRES A 24 V CONTROL CIRCUIT.
PLENUM SWITCH CONNECTION WIRE MAY BE BLUE OR YELLOW ON SOME MODELS.
Fig. 3. R4225A/R8225A typical hookup with a two-speed fan.
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
THE CONTROL CIRCUIT INCLUDES AN APPROPRIATE VOLTAGE POWER SUPPLY. THERMOSTAT
AND SAFETY DEVICES OF USED). 84225 REQUIRES A LINE VOLTAGE CONTROL CIRCUIT.
R5225 REQUIRES A 24 V CONTROL CIRCUIT.
Fig. 4. R4225B/R8225B typical hookup with a one-speed fan.
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 5. R8225C typical hookup with two-speed fan and combination fan and limit controller.
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
THE CONTROL CIRCUIT INCLUDES A 24 V POWER SUPPLY, TRANSFORMER, AND SAFETY
DEVICES (IF USED).
TO AUXILIARY CIRCUIT. MAY BE USED AS A LOCKOUT CONTACT TO PREVENT AN ELECTRIC
STRIP HEATER FROM OPERATING UNLESS THE FAN MOTOR IS OPERATING. OR AS
CONDENSING UNIT SWITCHING MEANS.
Fig. 6. R8225D typical hookup with one-speed fan and auxiliary load.
CHECKOUT
Operate the system according to the manufacturer’s for at least one cycle in both heating and cooling to make sure the system and the fan relay operate as intended.
www.resideo.com
Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
60-2165—03 M.S. Rev. 08-20 | Printed in the United States
© 2020 Resideo Technologies, Inc. All rights reserved.
This product is manufactured by Resideo Technologies, Inc. and its affiliates.
