Chart - Cooling/Heating Thermostat - Bard H24A4-A Installation Instructions Manual

Unit Low Voltage Terminal Connection Chart – Cooling/Heating Thermostat
Terminal
1* Compressor on Output Signal from Jade
2 24VAC HOT from Terminal 2 Connected to Unit Transformer to Thermostat
3 24VAC COMMON from Unit Transformer to Thermostat
Unit Compressor Operation, Unit Receives Signal from MC for Compressor/
4*
Condenser Fan On
5 Close Damper Input (Close Blade 100%)
6 Electric Heat On Operation, Stage 1 and 2, Unit Receives Signal from Thermostat
7 1st Stage Cooling Input, 1st Stage Cooling Signal – Economizer Use Only
8 2nd Stage Cooling Input, 2nd Stage Cooling Signal – Economizer Use Only
9 Blower Operation (Indoor Blower On), Unit Receives Signal from Thermostat
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
14 Occupied Signal Input, Econ Emergency Open (Open Blade 100%)
Econ Open Output (6V HOT, 24V HOT after Blade Open 100% and Delay)
15
16 Alarm Relay Common Dry Contact
17 Alarm Relay Normally Open Dry Contact
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
* Add jumper between T1 and T4 for compressor operation.
** 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.
TABLE 13
Description
Series "2"
MC Terminal Connection
Reference
Not Used
"R" on Tstat
"C" on Tstat
"Y" on Tstat
Not Used
"W" on Tstat
Economizer 24V Signal
Economizer 24V Signal
"G" on Tstat
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Building Smoke Alarm
(optional)
Not Used
Not Used
Manual 2100-639A
Page
"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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