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6 720 807 794 (2013/04)UNIMAT
10.4 Additional safety equipment to DIN-EN 12828
10.4.1 Safety equipment
10.4.2 Boiler safety equipment assembly to DIN-EN 12828
An intermediate flow piece and boiler safety assembly
are required to install the safety equipment.
Versions flange PN16 to DIN 2633:
• DN32/40/50/65/80/100/125/150/200/250/300/350
The safety equipment assembly for “standardised”
boiler versions consists of:
• Intermediate flow piece
• Shut-off valve
• Boiler safety assembly
• Minimum pressure limiter
•PRESSURE GAUGE
• Pressure gauge shut-off valve with test connection
The safety equipment assembly in the standard
equipment level consists of:
• Intermediate flow piece
• Shut-off valve
• Boiler safety assembly
• Minimum pressure limiter or low water indicator
• PRESSURE GAUGE
• Pressure gauge shut-off valve with test connection
• Maximum pressure limiter
Fig. 49 Boiler safety equipment assembly for UNIMAT UT-L boilers (intermediate flow piece with boiler safety assembly and
valves; dimensions in mm)
[1] Flow
[2] Level limiter
(designed as low water indicator, optional)
[3] Pressure indicator (with test function)
[4] Maximum pressure limiter
[5] Level limiter (designed as minimum pressure
switch)
[6] Shut-off valve DN20
[7] Temperature sensor (variable output control,
optional)
Safety equipment version
High limit safety cut-out (STB) with shutdown temperature
≤ 110 °C
Heat source > 300 kW
Safety equipment assembly, standard equipment
level
required
Set with STB and maximum pressure limiter Required
1)
1) As an alternative to a flash trap, the set with STB and maximum pressure limiter can be used
Minimum pressure limiter Alternative to low water indicator
Table 33 UNIMAT UT-L boiler safety equipment versions
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