Harsco Industrial MACH C1500GG Installation & Owner's Manual page 52

6.2.2 Control Panel
6
7
Mark Description
1 Terminal Block 2 (TB2) 120V
2 High Temperature Limit
3 Terminal Block 1 (TB1) Low V
4 Air Switch (on back)
5 High Exhaust Back Pressure Switch
(HEBPS) on back
1
8
6 5 Amp Circuit Breaker
7 10 Amp Circuit Breaker
8 ENVI™ Control Main Board
ENVI™ Control Interface Board
9
10 Low Water Cut-Off Board
52
2
4
5
10
MACH® Gas-Fired Boiler
3
9