Modine Manufacturing MPR - Page 25

25MCP15-500.7
START-UP PROCEDURE - CONTINUED
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3
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9
10
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4
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5
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Figure 25.1 - Gas Heat Option Gas Controls - C-Cabinet Sized Units
81% Efficiency Option (Digit 18 = J, K, L or M)
90% Efficiency Option (Digit 18 = U or V)
NOTE: For this option, only the left-
side furnace is shown. The right-side
furnace will be nearly identical.
1 Power exhauster
2 Maxitrol EXA STAR modulating
gas valve
3 Main combination gas valve
(hidden behind Item #5)
4 High limit control
5 Solid state ignition control board
6 Valve state relay to Carel controller
7 Not applicable
8 Not Applicable
9 Vent differential pressure proving
switch
10 Direct spark ignitor
11 Manifold tee pressure tap
12 Flame sensor
13 Manifold piping with gas orifices
14 Condensate drain float switch
15
1
3
4
13
9
10
1 Power exhauster
2 Maxitrol EXA STAR modulating
gas valve (right-hand furnace only)
3 Main combination gas valve
4 High limit control
5 VB1200 master furnace control board (for right-side furnace)
6 VB1201 slave furnace control board (for left-side furnace)
7 Direct spark ignition control board
8 Not Applicable
9 Vent differential pressure proving switch
10 Direct spark ignitor
11 Manifold tee pressure tap
12 Flame sensor
13 Manifold piping with gas orifices
14 Not applicable
15 Heat exchanger tube drain tray with drain line
Left Furnace
(Slave)
Right Furnace
(Master)
6
7
12