This document is a user manual for testo 550 digital manifold. It provides detailed information about the product's usage, maintenance, etc.
This manual provides instructions for the testo 550, a digital manifold designed for maintenance and service operations on refrigeration and heat pump systems. It replaces traditional mechanical manifolds, temperature tables, and pressure/temperature charts by allowing users to load, adjust, test, and monitor pressures and temperatures digitally. The device is compatible with most non-corrosive refrigerants, water, and glycol, but not with ammonia-based refrigerants. It must only be used by authorized qualified personnel and is not suitable for explosive environments.
The document covers safety measures, environmental protection guidelines, technical specifications, product description, and step-by-step usage instructions. Key features include four measurement channels, support for 40 selectable refrigerants, and various measurement modes such as minimum, maximum, and mean values. The manual also details battery installation, valve operation, and troubleshooting procedures.
| Number of channels | 4 |
|---|---|
| Pressure measurement range | -1 … 50 bar (rel) |
| Temperature measurement range | -50 … +150 °C |
| Power source | 4x 1,5 V type AA batteries |
| Battery life | approx. 150 hours |
| Compatible refrigerants | 40 refrigerants including R134a, R404A, R410A |
| Operating temperature | -10 … 50 °C |
No, the testo 550 is not compatible with refrigerants containing ammonia.
The device requires 4x 1.5V type AA batteries or rechargeable equivalents.
No, replacing the valve positioner or valve is not permitted for the user and must be done by Testo Service Clients.
The warranty period is 2 years.