Sharp TM150 Operations Instructions download pdf (Page 16)

Item Description Description

1 Main switch Before starting any maintenance work: Switch off the entire system

❒

The power to all components is switched off.

2 Stop button If the system overheats: Switch off the boiler

❒ The pumps continue to run

➥ CAUTION! Always turn off the heating using the STOP button.

Never use the main switch.

3 Door switch Switches the induced draught fan to full speed if the door is opened while

the boiler is running

4 Safety overload switches,

motor overload switch

Switch off the related component in the event of fault currents or overloads

5 Power supply fuses Properly fuse the control system and any electronic components

F1 Primary transformer 800 mAT

F2 Power supply 5 VDC 1.6 AT

F3 Power supply +15 VDC 200 mAT

F4 Power supply -15 VDC 200 mAT

F5 Power supply 24 VDC 2.0 AT

F6 Power supply 12 VDC 3.15 AT

❒

When changing fuses, fit fuses with the rated current specified.

6 Motherboard fuse Motherboard fuse 5 AT

❒

When changing the fuse, fit a fuse with the rated current specified.

5 Devices for preventing the boiler from overheating

A Boiler controller Switches the boiler and feed off if the boiler temperature reaches a prede‐

fined value (default 5°C) above the boiler temperature setpoint.

B Thermal discharge safety device At a temperature of around 100°C a valve opens and sends cold water to

the safety heat-exchanger (safety battery) to reduce the temperature.

C Safety temperature limiter

(STL)

Switches off the blower fan at a maximum boiler temperature of 105°C.

The pumps continue to run.

Once the temperature falls to below approx. 75°C, the STL can be reset

mechanically:

❒

Unscrew the cap on the safety temperature limiter

❒ Reset the safety temperature limiter by pressing with a screwdriver

D Safety valve

(not illustrated, provided by the custom‐

er)

When the boiler pressure is too high, the safety valve opens and vents off

the hot water as steam.

❒

Before you start up the system again, top up the system to replace

any water which has been lost through venting.

Safety

Safety devices

16 Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com

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Sharp TM150 Operations Instructions Page 16

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