Danfoss 4-Way Reversing Valve Coil, Type STF Z Installation Guide
Summary
This comprehensive manual provides professional guidelines for installing, operating, and maintaining the 4-Way Reversing Valve (STF-****Z) designed for heat-pump air conditioners. It covers essential safety precautions, detailed connection procedures, technical specifications (including pressure limits and suitable refrigerants), and operational best practices to ensure optimal system performance. This guide is essential reading for HVAC technicians who require accurate knowledge before commissioning or servicing the valve to guarantee efficiency and longevity of their cooling/heating systems.
Manual Details
| Brand | Danfoss |
|---|---|
| Pages | 1 |
| File Size | 137.67 KB |
| Published | June 05, 2026 |
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Frequently Asked Questions
What is the maximum working pressure for this valve?
The Max. Working Pressure is 3.3MPa{33bar}.
What kind of refrigerants must be used with this valve?
It is designed for use only with fluorocarbon refrigerants.
What safety measures must I follow when brazing the valve?
Remove the coil first, wrap wet rags around the body (keeping it under 120℃), and fill the inside with inert gas like nitrogen.