Coltene SciCan BRAVO G4, Техническое и сервисное руководство, Страница: 87 / 116

Sterilizers Bravo G4
- TECHNICAL MANUAL
EN TECHNICAL SHEETS
85
7. TECHNICAL SHEETS
WARNING:
Before performing any type of operation on internal components, turn off the autoclave
and disconnect the mains cable.
7.1. TECHNICAL SHEET ST01 - STEAM GENERATOR (ON ALL MODELS)
The STEAM GENERATOR is secured to the rear/left upright of frame and can be accessed after removing the left
side panel and the rear panel.
WARNING:
The service activity on this component requires the side covers removal. Once the
intervention has been completed, correctly refit all covers and carry out the SAFETY
TEST (including dielectric strength and ground continuity tests).
WARNING:
The STEAM GENERATOR can become very hot and may reach temperatures above 150°C
(302°F); check the reading of PT2 – generator temperature probe in the SERVICE menu
before removing the side covers.
Power off the autoclave and disconnect the power mains cord before removing the side
covers.
The GENERATOR is protected by a ceramic insulating covering that must be refitted after completing any
maintenance operation; two double insulating washers are required at each fastening point to the frame and they
must be refitted correctly.
GENERAL CHARACTERISTICS
The generator is made of a cylindrical outer body and a grooved inner core that are connected by a threaded
coupling; the two sections can be separated for maintenance purposes.
Pressure is sealed between cylindrical body and inner core thanks to two O-rings placed on the core; these O-rings
must be replaced each time the generator is disassembled.
The cylindrical body accommodates:
- PT2 - generator temperature probe, housed in a suitable seat, secured with a retaining screw; PT2 can be
removed and replaced
- Safety thermostat – 300°C (572°F) operation threshold – manual reset
- Water inlet fitting – bottom
- Steam outlet fitting – top
The grooved inner core accommodates the heating element:
- 2000W/230V with a value of 26.6 ohm – (ROW versions / US/CA versions 240V-60Hz)
- 1500W/120V with a value of 9,6 ohm – (US/CA versions 120V-60Hz)
Resistance values can be measured directly at the points where the heating element is connected to the main PCB
using a common tester.
SERVICE OPERATIONS
WARNING:
Before performing any type of operation on internal components, turn off the autoclave
and disconnect the mains cable.
Replacing the safety thermostat
The thermostat can be removed without taking off the external heat insulation.
Disconnect the wirings connected to the safety thermostat, remove the 2 fastening screws, position the new
thermostat and secure it using the 2 screws; reconnect the wirings.