MACH
®
Series
Gas-Fired Boiler
Appendix
44
6.2.2 Control
Panel
Mark Description
6 User
Interface/Display
Screen
1
Terminal Block 1 (TB1)
7
ENVI IF Board
2
Terminal Block 2 (TB2) 120 V
8
Low Water Cut Off (LWCO)
3
High Temperature Limit
9
ENVI Main Board
4
Air Switch
10
10 Amp Circuit Breaker
5
High Exhaust Back Pressure Switch
(HEBPS)
11
5 Amp Circuit Breaker
12
On/Off
Switch
1
2
3
4
5
6
7
8
9
10
11
12
