---
Version April 2019
EN
7
HST – S – 315 2.0 User’s Manual
O . M . I . S . A . S r l
Via Verga 9/11
20845 Sovico (MB), Italy
4
Principle of Operation
The HST – S – 315 2.0 welding unit allows using electrofusion fittings
to join discharge lines used in HVACR applications and made of PE for
diameters up to 315 mm.
The microprocessor-controlled unit:-
• controls and monitors the welding process in a fully automated
fashion,
• determines welding duration depending on ambient tempera
-
ture,
• indicates all information with three LEDs and a seven-segment
display screen.
Important
Watch the color coding to be sure you select the right one of
the supplied welding cables, which matches the size and the
manufacturer of the fitting to be welded (see Sect. 5.2).
Optional accessories
• Handheld Scraper
• Welding Cable Extension
5 Operation
5.1 Turning the Welding Unit On
After connecting the power supply cord to 230 V mains power, turn
the welding unit on at the On/Off switch. The unit then performs an
auto-test. All three LEDs light up briefly and simultaneously to indicate
that the unit is ready for operation. All segments of the seven-segment
screen, too, light up as
888
for a check for approximately 1 second.
After this, both the LEDs and the screen characters go off again.
5.2 Connecting the Electrofusion Fitting
Connect the welding adapter the terminals of which are going to be
plugged into the fitting, to the welding cable routed out of the weld-
ing unit (see figures below). In doing this, be sure to use the welding
adapter that matches the kind of fitting planned to be processed.
Important
As long as no welding adapter is connected to the welding
cable, the display shows
---
. It changes to
A00
when the
adapter is used that has one yellow push-on terminal (con-
nector type A00). When using the adapter with one green
Connector at the Working
End of the Welding Cable
from the Welding Unit
Terminals of the Welding Adapter to be Plugged into
the Electrofusion Fitting (color and identifier on one
of them, to code the type of connector)
Plug of Welding Adapter to
Be Connected to Connector
of Welding Cable
