Bard T**H Wiring - Low Voltage Wiring, Table Diagram To Use With Unit And Vents, Wall Thermostat

TABLE 1

DIAGRAM TO USE WITH UNIT AND VENTS

Vent

None

CRV, ERV, MFAD

CRVMWH-3

EIFM

ECONWM*

CHCRV-5

Economizer

CS2000A*

System

Vent Code

X

R, M, V, P

C

E

T, W, S

Thermostat

Programmable

Programmable

Programmable

Programmable

Programmable

All

Model Series

No

Yes

No

Yes

No

Yes

No

Yes

No

Yes

S**H

Heat Pump

T**H

1

1

3 & 4

2

15

14

N/A

5

N/A

13

11

W**H

Heat Pump with

S**H*D

T**H*D

7

6

9 & 10

8

N/A

14

N/A

12

N/A

13

N/A

Dehumidification

W**H*D

WIRING – LOW VOLTAGE WIRING

230/208V, 1 phase and 3 phase equipment dual primary voltage transformers. All equipment leaves the factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable operating voltage range for the 240V and 208V taps are:

TABLE 2

OPERATING VOLTAGE RANGE

TAP	RANGE
240V	253 – 216
208V	220 – 187

NOTE: The voltage should be measured at the field power connection point in the unit and while the unit

is operating at full load (maximum amperage operating condition).

An 18 gauge copper, color-coded thermostat cable is recommended. The connection points are shown in this Manual. See Table above.

Low Voltage Connection

These units use a grounded 24-volt AC low voltage circuit.

The “R” terminal is the hot terminal and the “C” terminal is grounded.

“G” terminal is the fan input.

“Y” terminal is the compressor input.

“B” terminal is the reversing valve input. The reversing valve must be energized for heating mode.

“R” terminal is the 24 VAC hot.

“C” terminal is the 24 VAC grounded.

“L” terminal is compressor lockout output. This terminal is activated on a high or low pressure trip by the electronic heat pump control. This is a 24 VAC output.

“W2” terminal is second stage heat (if equipped).

“O1” terminal is the ventilation input. This terminal energizes any factory installed ventilation option.

“E” terminal is the emergency heat input. This terminal energizes the emergency heat relay.

“W3” terminal is the dehumidification input. This terminal energizes compressor, blower and three-way valve.

LOW VOLTAGE CONNECTIONS

FOR DDC CONTROL

Fan Only			Energize G
Cooling Mode			Energize Y, G
Heat Pump Heating			Energize Y, G, B
2nd Stage Heating			Energize G, W2, Y, B
w/Heat Pump (if employed)
Ventilation			Energize G, O1
Emergency Heat			Energize B, W2, E, G
Dehumidification			Energize W3
		TABLE 3
		WALL THERMOSTAT
Part Number			Predominate Features
		2 stage Cool, 2 stage Heat - Conventional
8403-058		1 stage Cool, 2 stage Heat - Heat Pump
(TH5220D1151)	Electronic Non-Programmable
		Auto or Manual changeover
		3 stage Cool; 3 stage Heat
8403-060		Programmable/Non-Programmable Electronic
		HP or Conventional
(1120-445)
		Auto or Manual changeover
		Dehumidification Output

Manual	2100-516H
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