Danfoss Actuator - HPA2
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Product Information
Full details
This guide is for individuals needing a replacement actuator for 2-port zone valves, specifically those compatible with Danfoss HPV22 & HPV28 valve bodies. The key benefit is its direct replacement capability for specific Landis & Gyr, Pegler Sunvic, and Potterton models, ensuring system functionality. A caveat is its specific 4-wire, 230V configuration, requiring careful compatibility checks.
All features
| Model Part Number | HPA2 |
|---|---|
| Brand | Danfoss |
Extended Product Information
FAQs
What is the Danfoss HPA2 actuator used for?
The Danfoss HPA2 is a replacement actuator/motor for 2-port zone valves, commonly used in heating systems.
Which valve bodies is this actuator compatible with?
It is primarily designed for use with Danfoss HPV22 and HPV28 valve bodies, and is often fitted to the HPV22 22mm valve body.
Can I use this actuator if my old one was a different brand?
Yes, the HPA2 is designed to replace specific actuators from Landis & Gyr (SK2), Pegler Sunvic (SZ1301/SZ2301), and Potterton (PMV2).
What voltage does the HPA2 operate on?
The HPA2 operates on a standard 230V power supply.
How many wires does the HPA2 have?
The HPA2 features a 4-wire configuration for its electrical connections.
Does the actuator have a manual override?
Yes, it includes a manual lever for manual operation of the valve.
Where can I find wiring diagrams?
Wiring diagrams are typically provided with the zone valve system or heating control documentation. Refer to your system's manual for specific connections.
Troubleshooting
Actuator not moving or responding
Check that the power supply (230V) is correctly connected to the 4 wires. Verify that the wiring matches the original configuration. Ensure the manual lever is not engaged in the manual position.
Valve remains open or closed regardless of signal
Confirm the actuator is correctly seated on the valve body. Test the manual lever function; if it operates smoothly, the issue may be with the valve itself. If the manual lever is stiff or stuck, the valve may require servicing or replacement.
Intermittent operation
Inspect wiring connections for looseness or corrosion. Ensure the actuator is not overheating, which could indicate an internal issue or an electrical fault in the system.
Noisy operation
Some operational noise is normal. However, excessively loud grinding or clicking may indicate a problem with the actuator's internal mechanism or the valve body it's attached to.
Pros and Cons
Pros
- Ensures continued operation of heating systems by providing a direct replacement for common actuators.
- Simplifies replacement of older or failed actuators from different brands with a single Danfoss part.
- Manual override lever offers practical control during installation or maintenance.
- Designed for specific valve bodies, ensuring a precise fit and function.
Cons
- Limited to 4-wire, 230V systems; not suitable for low-voltage or different wiring configurations.
- Requires specific HPV22 or HPV28 valve bodies for proper installation.
- May require professional installation if unfamiliar with valve actuator replacement.
- Not a universal actuator; compatibility must be confirmed before purchase.
Setup, Compatibility & Care
Setup:
- Ensure the power supply to the zone valve is turned OFF.
- Carefully detach the old actuator from the valve body. Note the wiring connections.
- Attach the Danfoss HPA2 actuator to the compatible HPV22 or HPV28 valve body. Ensure it is securely seated.
- Connect the 4 wires according to the wiring diagram provided with the valve system, matching the previous connections.
- Restore power to the zone valve.
Compatibility:
- Valve Bodies: Primarily compatible with Danfoss HPV22 and HPV28 valve bodies.
- Voltage: Operates on 230V AC.
- Wiring: Requires a 4-wire connection.
- Replaces: Landis & Gyr SK2 Actuator, Pegler Sunvic SZ1301/SZ2301, and Potterton PMV2.
Care:
- The actuator requires minimal maintenance. Keep the area around the valve clear of obstructions.
- Avoid exposing the actuator to excessive moisture or dust.
- If cleaning is necessary, use a dry or slightly damp cloth. Do not use harsh chemicals or solvents.