The R4222D1021 is a general purpose relay from Resideo (Honeywell Home), 208/240 V, DPDT switching.
A relay lets a small control signal switch a much larger load. The thermostat or control board energizes a coil; the coil pulls contacts closed; the contacts carry the current that runs a blower, a circulator or an electric heat element. Nothing on the thermostat side ever sees line voltage.
DPDT — double pole, double throw: two independent circuits switched together, each with a normally open and a normally closed contact. It is what you need when one call has to make one thing and break another at the same instant.
Match the coil voltage and the contact rating to what you are replacing. A relay with the right coil but an undersized contact will work on the bench and weld shut in service.
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Brand: Resideo (Honeywell Home)
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Manufacturer Part #: R4222D1021/U
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Type: General purpose relay
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Switching: DPDT
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Voltage: 208/240 V
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UPC: 085267075756
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Category: Relays
Full Specifications
| Application |
Powerpile (millivoltage) applications, Pilot duty applications, Power pole applications |
| Product Features |
Molded terminal numbers and circuit diagram on top of relay provide easy identification for wiring and checking system operation, Untaped coil assures cooler operation, Laminated magnet construction for higher efficiency, Base designed for easy replacement of competitive relays, Plug compatible with Steveco 90-340 and Mars 90340. |
| Approvals and Standards |
UL Component Recognized, CSA Approved |
| Coil Rating Voltage |
208 V AC, 240 V AC |
| Coil Connection Size |
1/4 in, 6 mm |
| Coil Connection Type |
Double Quick Connects |
| Pilot Duty Rating |
Minimum: 3 VA @ 24 V AC, 120 V AC, 480 V AC, Maximum: 25 VA @ 24 V AC,, Maximum: 125 VA @ 120 V AC, 240 V AC, & 480 V AC, Resistive: 3 A @ 277 V AC (0.75 power factor), Resistive: 3 A @ 277 V AC (0.75 power factor) |
| Number of Poles |
2 Poles |
| Operating Frequency |
50 Hz, 60 Hz |
| Power Supply Frequency |
50 Hz, 60 Hz |
| Switch Action |
DPDT |
| Warranty |
1 Year |
| Ambient Operating Temperature (Min) |
-20 °F, -29°C |
| Ambient Operating Temperature (Max) |
155 °F, 68 °C |
| Mounting Type |
Screw Mount |
| Product Height |
1.88 in, 48 mm |
| Product Length |
2.38 in, 60 mm |
| Product Width |
2.16 in, 55 mm |
Documents & Downloads
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Product Data for R4222, R4228, R8222, R8228 Switching Relays (English) (1.5MB PDF)
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R4222A-H, J-N, P-W, Y; R8222A-H,J-N,P-W,Y,Z; R4228A,B,C,D; R8228A,B,C,D Switching Relays Installation Instructions (English) (0.6MB PDF)
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R4222B,N,V; R8222B,D,N,V; R4228B,D; R8228B,D Switching Relays Installation Instructions (English) (0.2MB PDF)
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Installation Instructions for C554A Cadmium Sulfide Flame Detector (English) (0.6MB PDF)
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CARRIER Universal Service Part (0.0MB PDF)
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CARRIER Universal Service Part (0.1MB PDF)
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Sell Sheet for R4222, R4225, R4228, R8222, R8225, R8228, R8229, R8246, R8330, RC840, RT850, R841, ST82 Relays (English) (0.4MB PDF)