Description
Product Summary
The Supco SPR1 Ultra Start Series Hard Start, MPR1 with NO Plastic Cap is a professional-grade replacement part from Supco (Sealed Unit Parts Co.), a trusted name in HVAC/R and appliance parts since 1945. Hard Start Kit Mechanical Potential Relay (MPR) and Start Capacitor, for use on 3.5 to 5 HP units.
Hard start kits give a struggling compressor the extra starting torque it needs on low-voltage days, after long off-cycles, or when an aging compressor begins to trip on locked-rotor amps. Adding the correct hard start reduces start-up current spikes, cuts down on nuisance breaker trips, and can extend compressor life on PSC-type single-phase systems. Always match the kit to the compressor horsepower and system voltage.
Key Features
- Can be used on PSC and CSIR type compressors
- Easy 2-wire installation
- Instant re-start
- Mechanical Potential Relay
- NATE® Recognized (Course #1867-0002)
- OEM approved technology
- UL® Recognized
- Voltage sensing
- WARNING: Prop 65 info
Specifications
| Brand | Supco |
|---|---|
| Part Number | SPR1 |
| Part Type | Hard Start Kit |
| Capacitor (MFD) | 270 to 324MFD |
| Range (HP) | 3.5 to 5HP |
| Capacitor Voltage | 330 VAC |
| Operating Voltage | 208 to 277 VAC |
Cross Reference
The Supco SPR1 is a direct replacement for the following OEM and competitor part numbers. Always verify ratings and fit against the original part before installing.
| Replaces Part # | Manufacturer | Description |
|---|---|---|
| MPR1 | SUPCO® |
Ideal Applications
- Residential and light commercial air conditioners and heat pumps
- Hard-starting or locked-rotor compressors
- Low-voltage sites and long line runs
Frequently Asked Questions
Can the hard start be mounted sideways?
No, hard starts should always be upright.
Are the wire leads polarity sensitive?
No
Where do I attach the (2) wires? (Always disconnect power before installation)?
Attach (1) wire to Common, and the other to the Hermetic terminal on the Run Cap.
What's Included
- (1) Supco SPR1 Ultra Start Series Hard Start, MPR1 with NO Plastic Cap
Safety: Always disconnect power and follow lockout/tagout procedures before servicing electrical components. Installation should be performed by a qualified technician.
