Manual 2100-639A
Page
24 of 28
Terminal
Description
MC Terminal Connection
Series "2"
Reference
1*
Compressor on Output Signal from Jade to MC
"A" on Relay Board
"A"
2
24VAC HOT
from Terminal 2 Connected to Unit Transformer to MC
"R" on Relay Board
"R"
3
24VAC COMMON
from Unit Transformer to MC
"C" on Relay Board
"C"
4*
Unit Compressor Operation, Unit Receives Signal from MC for Compressor/
Condenser Fan On
"Y" on Relay Board
"Y"
5
Close Damper Input (Close Blade 100%), Unit Receives Signal from MC**
"F" on Relay Board
"F"
6
Electric Heat On Operation, Stage 1 and 2, Unit Receives Signal from MC
"W" on Relay Board
"W1"
7
1st Stage Cooling Input, 1st Stage Cooling Signal to Jade from MC
"Y1" on Relay Board
"Y1"
8
2nd Stage Cooling Input, 2nd Stage Cooling Signal to Jade from MC
"Y2" on Relay Board
"Y2"
9
Blower Operation (Indoor Blower On), Unit Receives Signal from MC
"G" on Relay Board
"G"
10
Filter Switch Normally Closed Dry Contacts
Not Used on MC
"4"
11
Filter Switch Normally Closed Dry Contacts
Not Used on MC
"5"
12
Blade Switch Delay Relay Normally Closed Dry Contacts
Not Used on MC
"8"
13
Blade Switch Delay Relay Normally Closed Dry Contacts
Not Used on MC
"9"
14
Occupied Signal Input, Econ Emergency Open (Open Blade 100%), Unit
Receives Signal from MC
"E" on Alarm Board
"E"
15
Econ Open Output (
6V HOT, 24V HOT
after Blade Open 100% and Delay)
Not Used on MC
"10"
16
Alarm Relay Common Dry Contact, MC Signals Compressor Fail Alarm
"LOCKOUT 3" on Alarm
Board
"3"
17
Alarm Relay Normally Open Dry Contact, MC Signals Compressor Fail Alarm
"LOCKOUT 2" on Alarm
Board
"2"
18
Alarm Relay Normally Closed Dry Contact
Not Used on MC
"1"
19
24VAC HOT
to Terminal 2 from Unit Transformer Through Smoke Alarm Jumper
Wire***
Building Smoke Alarm
(optional)
"RT"
20
2nd Stage Heating On Operated Through Jumper to Terminal 6
Not Used on MC
"W2'
21
Blade Switch Terminal
24V HOT
When Blade is Open, Sends Signal from Switch
to Delay Relay
Not Used on MC
"7"
TABLE 12
Unit Low Voltage Terminal Connection Chart – MC Series Controller
* Add jumper between T1 and T4 for compressor operation.
** 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.
