Thrush DSHE Series - Manual (Page 6)

Thrush Co.
Manual #9636-0555
2.1 Safety Information continued
Before making any piping connections, assure that all piping is clean and free of
any foreign material such as debris or scale. Foreign material in the piping can
cause damage to the unit and/or affect the performance and operation. Manual
shutoff valves should be installed upstream/downstream from all connections to
act as an isolation device. These valves should be in the closed position and
remain so until the installation is complete.
Any temperature control valve installed on the Hot-Pak should be of the fail-closed
design.
When starting up, always introduce the cold fluid first. Introduce the hot side fluid
slowly. Bring the unit from ambient temperature up to operating temperature
gradually. Do not introduce hot or cold fluids suddenly, which could damage the
unit and void the warranty. A qualified electrician should make all electrical
connections.
To protect the tube bundle from damage, the unit must be filled with water before
allowing steam to enter.
When shutting down, always shut off the hot fluid first.
The support stand was designed to aid the installation process of the Hot-
Pak into system piping. The support stand is not a replacement for system
piping supports. System piping must be supported before and after the Hot-
Pak in conjunction with the support stand.