21 AC-2000 | 8.10/8.11
The alarm output, code 40, should be normally closed so that the alarm activates on a power failure. In
normally closed mode, the AC-2000 turns the relay on to turn the function off, and releases the relay to turn
the function on. Usually, Relay 12 is the alarm relay since it provides both normally open and normally
closed contacts. With the extension box, Relay 20 can serve as an alarm relay instead of Relay 12.
NOTE: After defining the relay, configure System Variable (refer to the User Manual).
Code Description
1 through 8 Ventilation Group 1 through 8
9, 10 Zone A Heat: Low, High
11, 12 Zone B Heat: Low, High
13, 14 Zone C Heat: Low, High
15, 16, 17 Zone A Radiant Heat: Low, High, Ignition
18, 19, 20 Zone B Radiant Heat: Low, High, Ignition
21, 22, 23 Zone C Radiant Heat: Low, High, Ignition
24 Cooling System
25 Lighting System
26 Feeding System
27, 28 Curtain 1: Open, Close
29, 30 Curtain 2: Open, Close
31, 32, 33 Extra Systems 1 through 3
34 Circulation Fans
35, 36 Positive Pressure Optimizer: Burner, Fan
37, 38 Static Pressure Air Inlet: Open, Close
39 Fogger
40 Alarm
42, 43 Tunnel open/close
45, 46 Curtain 3: Open, Close
47, 48 Curtain 4: Open, Close
49, 50 Zone D Heat: Low, High
51, 52 Zone E Heat: Low, High
53, 54 Zone F Heat: Low, High
55 Fan 9
56 Fan 10
57 Fan 11
58 Fan 12
59 Fogger 2
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