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Unit Low Voltage Terminal Connection Chart – MC Series Controller
Terminal
1
Compressor on Output Signal from Jade to MC
2
24VAC HOT from Terminal 2 Connected to Unit Transformer to MC
3
24VAC COMMON from Unit Transformer to MC
Unit Compressor Operation, Unit Receives Signal from MC for Compressor/
4
Condenser Fan On
5
Close Damper Input (Close Blade 100%), Unit Receives Signal from MC*
6
Electric Heat On Operation, Stage 1 and 2, Unit Receives Signal from MC
7
1st Stage Cooling Input, 1st Stage Cooling Signal to Jade from MC
8
2nd Stage Cooling Input, 2nd Stage Cooling Signal to Jade from MC
9
Blower Operation (Indoor Blower On), Unit Receives Signal from MC
10
Filter Switch Normally Closed Dry Contacts
11
Filter Switch Normally Closed Dry Contacts
12
Blade Switch Delay Relay Normally Closed Dry Contacts
13
Blade Switch Delay Relay Normally Closed Dry Contacts
Occupied Signal Input, Econ Emergency Open (Open Blade 100%), Unit
14
Receives Signal from MC
15
Econ Open Output (6V HOT, 24V HOT after Blade Open 100% and Delay)
Alarm Relay Common Dry Contact, MC Signals Compressor Fail Alarm
16
Alarm Relay Normally Open Dry Contact, MC Signals Compressor Fail Alarm
17
18
Alarm Relay Normally Closed Dry Contact
24VAC HOT to Terminal 2 from Unit Transformer Through Smoke Alarm Jumper
19
Wire**
20
2nd Stage Heating On Operated Through Jumper to Terminal 6
Blade Switch Terminal 24V HOT When Blade is Open, Sends Signal from Switch
21
to Delay Relay
*
Requires signal from "R" on MC controller to "F" on MC controller.
** Replace jumper wire with smoke alarm connections to interrupt 24VAC unit power if smoke alarm is used in shelter. Jumper can also
be removed to break 24VAC power to unit.
Manual 2100-647
Page
24 of 28
TABLE 12
Description
Series "2"
MC Terminal Connection
Reference
"A" on Relay Board
"R" on Relay Board
"C" on Relay Board
"Y" on Relay Board
"F" on Relay Board
"W" on Relay Board
"Y1" on Relay Board
"Y2" on Relay Board
"G" on Relay Board
Not Used on MC
Not Used on MC
Not Used on MC
Not Used on MC
"E" on Alarm Board
Not Used on MC
"LOCKOUT 3" on Alarm
Board
"LOCKOUT 2" on Alarm
Board
Not Used on MC
Building Smoke Alarm
(optional)
Not Used on MC
Not Used on MC
"A"
"R"
"C"
"Y"
"F"
"W1"
"Y1"
"Y2"
"G"
"4"
"5"
"8"
"9"
"E"
"10"
"3"
"2"
"1"
"RT"
"W2'
"7"
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