Bard S**H*D, W**H*D, T**HD installation instructions* Only if optional CO2 controller is used

Page 8

FIGURE 4

HEAT PUMP WITH OPTIONAL MFAD, CRV and ERV VENTILATION

PACKAGING WITH NON-PROGRAMMABLE THERMOSTAT WITH CO2 CONTROLLER

Low Voltage Wiring Diagram

Thermostat

#TH5220D1151 C G R Rc Y E AUX O/B Bard part #8403-058

1

"L" is constant 24V output when thermostat is in Em Heat mode

	L	1 Stage Cool
	L	2 Stage Heat
		2 Stage Heat

1	2	3	4	5	6	Optional CO2 Controller
						Bard part #8403-067

	24V Low Voltage		C	G	R Y1 Y
	Terminal Block		C	G	R Y1 Y
	Terminal Block
		2			Red
		2			Orange
				Black	Orange
				Black

Black

1Factory Jumper Installed Connect orange wire to "G"

2only if optional CO2 controller is used.

E W2	B W1 W3 DH	O1 L	Unit
	1
CRV	Brown/White
ERV	Brown/White
ERV
Ventilation Packages
MFAD	Red
			MIS-2634 E

Manual	2100-516H
Page	8 of 19

Image 8

Contents Single Stage Heat Pumps LOW Voltage Control Circuit Wiring Contents Wiring LOW Voltage Wiring Thermostat Wire Size Low Voltage Wiring Diagram Low Voltage Wiring Diagram Stage Cool Only if optional CO2 controller is used Low Voltage Wiring Diagram Electronic Programmable Stage Cool Stage Heat Cool CRV Stage Cool 2 Stage Heat WH/SH Heat Pump Connection Diagram WH Unit Low Voltage Term. Strip Thermostat 24V Low Voltage Terminal Block Yellow Black Red Stage Cool Stage Heat Unit