User Manual

3 Product description
5
> If the manifold falls or another comparable mechanical load
occurs, the pipe sections of the refrigerant hoses may break.
The valve stem shutoff may also be damaged, whereby further
damage to the interior of the manifold may occur that cannot be
identified from the outside. The refrigerant hoses must therefore
be replaced with new, undamaged refrigerant hoses every time
the manifold falls or following any other comparable mechanical
load. Send the manifold to Testo Customer Service for a
technical check for your own safety.
> To prevent damage from ESD (electro-static discharge) or
transient voltage spikes make sure that your refrigeration
system is properly grounded, as otherwise the manifold might
get damaged.
2.3. Protecting the environment
> Dispose of spent batteries in accordance with the valid legal
specifications.
> At the end of its useful life, send the product to the separate
collection for electric and electronic devices (observe local
regulations) or return the product to Testo for disposal.
> Refrigerant gases can harm the environment. Please note the
applicable environmental regulations.
3 Product description
3.1. Use
Testo 549 and testo 550 are digital manifolds for maintenance and
service work on refrigeration systems and heat pumps. They are
intended for use by qualified personnel only.
The functions of the testo 549 and testo 550 are designed to
replace analog manifolds, thermometers and pressure/temperature
charts. Pressures and temperatures can be applied, adapted,
tested and monitored.
Testo 549 and testo 550 are compatible with most non-corrosive
refrigerants, water and glycol. Testo 549 and testo 550 are not
compatible with refrigerants containing ammonia.
The instruments must not be used in explosive environments!