Commercial Water HeatersElectric Heat Pump
State CSHP3CO-6 Commercial Water Heater Manual
Setup, everyday use, maintenance and troubleshooting for the commercial heat pump water heater, with verified specifications.
- COP6.3
- FuelElectric (heat pump)
About the State CSHP3CO-6
The State CSHP3CO-6 is a commercial heat pump water heater certified under the ENERGY STAR program. It has a rated coefficient of performance (COP) of 6.3, meaning it delivers about 6.3 units of heat for every unit of electricity it uses. That COP is higher than 86% of the 67 Electric Heat Pump models in our database.
The certification lists no storage volume for this unit, so it works as a heat source piped to separate storage tanks sized for the building's peak demand.
Compared with electric-resistance water heating (a COP of 1), a COP of 6.3 means the unit needs only about 16% as much electricity to deliver the same amount of heat.
Specifications
| Brand | State |
|---|---|
| Model number | CSHP3CO-6 |
| Model name / series | EMERGE-xc |
| Type | Electric Heat Pump |
| Fuel | Electric |
| Coefficient of performance (COP) | 6.3 |
Safety information
- Have the electrical supply installed by a licensed electrician on a circuit that matches the nameplate voltage, phase and current, with the disconnect and overcurrent protection the manual specifies.
- Heat pump units contain refrigerant under pressure. Sealed-system service must be performed by a certified refrigeration technician.
- Water above 120 °F (49 °C) can scald. Where water is stored hotter for sanitation or Legionella control, install thermostatic mixing valves to temper water delivered to fixtures.
- Turn off the fuel or power supply and close the water valves before servicing.
Installation and first-time setup
Heat pump water heaters move heat from a source — typically the surrounding or outdoor air, or a water loop, depending on the design — into the water, so the location and source conditions directly affect capacity and efficiency. Follow the manufacturer's application guide for source temperature limits, clearances and airflow.
- Plan the system
Design the system with the storage tanks, circulators and controls shown in the manufacturer's piping diagrams; small-volume heat pump units rely on separate storage to meet peak demand.
- Make the water connections
Install isolation valves, unions and any strainers specified, and add an expansion tank where the system is closed.
- Connect the condensate drain
Heat pumps produce condensate from the evaporator; pipe it to a drain and protect it from freezing.
- Wire the unit
Have an electrician connect the supply with a disconnect within sight of the unit, as required by code and the manual.
- Commission
A qualified technician verifies refrigerant operation, water flow, control settings and any backup heating before the system is put into service.
Using your commercial water heater
Setting the water temperature
Choose the storage or outlet temperature for the application and the facility's water-management plan. Common practice for Legionella control is to store water at 140 °F (60 °C) or higher and deliver it to hand sinks and showers through thermostatic mixing valves at a safe temperature. Commercial dishwashers usually need 140 °F supply water, with a booster heater for a high-temperature sanitizing rinse.
Getting the best efficiency
The rated COP of 6.3 applies at test conditions. Efficiency falls as the source gets colder or the required water temperature rises, so keep setpoints no higher than the application needs and keep source air or water within the manufacturer's range.
Care and maintenance
| When | What to do |
|---|---|
| Every 3 months | Clean air filters or source-water strainers and check the condensate drain. |
| Every year | Have a refrigeration technician check refrigerant operation, coils and controls, and flush the tank or heat exchanger as recommended. |
Follow the maintenance schedule in your manufacturer's manual — intervals depend heavily on water hardness and usage — and keep a service log; it is often a warranty requirement.
Troubleshooting
Check fuel or power, water valves and settings first. Anything involving gas controls, combustion, venting or electrical components should be handled by a qualified technician.
| Problem | Possible cause | What to try |
|---|---|---|
| Not enough hot water | Source conditions outside the rated range; dirty filters or strainers; demand exceeds capacity. | Check source temperature and airflow or water flow; clean filters; review system sizing. |
| Unit runs but heats slowly | Low refrigerant charge; iced or dirty evaporator; low water flow. | Clean coils and filters; call a refrigeration technician to check the sealed system. |
| Water around the unit | Blocked condensate drain; leaking fitting. | Clear the condensate line; tighten or repair fittings. |
| Error code displayed | Brand-specific diagnostic code. | Error codes are not standardized; consult the code table in your manufacturer's manual before resetting. |
Energy use and running costs
Heating 1,000 gallons of water by 70 °F takes about 583 thousand Btu. At its rated COP of 6.3, the State CSHP3CO-6 needs roughly 27 kWh — about $4.61 at $0.17 per kWh. Electric-resistance heating would need about 171 kWh ($29.05) for the same job.
| Hot water per day | Electricity per year | Cost per year |
|---|---|---|
| 250 gal | 2,475 kWh | $421 |
| 500 gal | 4,951 kWh | $842 |
| 1,000 gal | 9,901 kWh | $1,683 |
| 2,000 gal | 19,802 kWh | $3,366 |
Real-world COP varies with source temperature and setpoint, so actual costs can be higher in cold conditions or at high outlet temperatures.
Frequently asked questions
What is the COP of the State CSHP3CO-6?
Its rated coefficient of performance is 6.3, meaning it delivers roughly 6.3 times as much heat as the electricity it consumes under test conditions.
How much electricity does the State CSHP3CO-6 save compared with an electric water heater?
With a rated COP of 6.3, it uses roughly 16% of the electricity an electric-resistance water heater would need for the same hot-water output — about 84% less — at the rating conditions.
Does the State CSHP3CO-6 need a separate storage tank?
Yes. The certification lists no storage volume, so the unit is piped to separate storage tanks sized for the building's peak demand, following the manufacturer's piping diagrams.
How much does it cost to heat water with the State CSHP3CO-6?
At its rated COP of 6.3, heating 1,000 gallons by 70 °F takes about 27 kWh — roughly $4.61 at $0.17 per kWh.
Is the State CSHP3CO-6 ENERGY STAR certified?
Yes. It appears on the ENERGY STAR list of certified commercial water heaters, with a certification date of February 2026.
Sources and disclaimer
Specifications on this page come from the ENERGY STAR certified commercial water heaters dataset published by the U.S. Environmental Protection Agency (record certified February 2, 2026), retrieved October 7, 2026.
The setup, operating, maintenance and troubleshooting guidance is written by ManualHarbor's editors for this specific product type and configuration. It is an independent guide — not a reproduction of the manufacturer's manual — and ManualHarbor is not affiliated with State. Always follow the safety instructions, installation requirements and warranty terms supplied with your unit, and contact State or an authorized service provider for warranty repairs and replacement parts.
Running-cost figures use assumed U.S. average utility prices and are estimates for comparison only. See our editorial methodology for details.
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