Harsco Industrial C1500H Installation & Owner's Manual page 71

6.2.3 Control Panel for MACH
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C1500H/C2000H/C2500/C3000/C4000
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MACH
Description
Terminal Block 1 (TB1)
Air Switch
High Exhaust Back Pressure Switch (HEBP)
High Temperature Limit
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ENVI Control Main Board
Low Water Cut Off (LWCO)
On/Off Switch
5 Amp Circuit Breaker
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ENVI User Interface/Display Screen
Terminal Block 2 (TB2) 120 V
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ENVI Control Interface relay Board
Below is for cC3000/C4000 only
Main Power Input Terminals
Fuses
Power Transformer
Motor Relay
Gas Fired Boiler