Modine Manufacturing MPR - Page 26

26 MCP15-500.7
START-UP PROCEDURE - CONTINUED
Figure 26.1 - Gas Heat Option Gas Controls - D-Cabinet Sized Units - 800,000 Btu/hr and Smaller (81% Eff)
1 Power exhauster
2 Maxitrol EXA STAR modulating gas valve
3 Main combination gas valve
4 High limit control (hidden behind piping as shown)
5 Solid state ignition control board
6 Furnace control board
7 Vent differential pressure proving switch
8 Direct spark ignitor
9 Manifold pressure tap on manifold tee
10 Flame sensor
11 Manifold piping with gas orifices
12 Heat exchanger tube drain tray with drain line
1
3
5
7
2
4
6
8
10
11
12
9
Master FurnaceSlave Furnace (Opposite Side of Cabinet)
1
3
5
7
4
6
8
10
11
12