Aprilaire 8028 installation instructions Diagram 1 Two Transformers Serving Two Zones

DIAGRAM 1 - Two Transformers Serving Two Zones

DAMPER TRANSFORMER

SIZING

ZONE 2

TRANSFORMER

MAX. NO. OF

VA RATING

DAMPERS

DAMPERS

(“daisy chain” wiring)

40 VA

4

ZONE A DAMPER

50 VA

5

TRANSFORMER

5

4

3

2

1

75 VA

7

SIZE FOR TOTAL NUMBER OF

100 VA

10

DAMPERS WIRED TO ZONE A

ZONE A

DAMPER OUTPUTS

DAMPERS

120

24

SINGLE

DAMPER

MOTOR

VAC

VAC

POWER POWER A B

SINGLE

SUPPLY

ZONE A –5 AMP

ZONE A

ZA

NO

DAMPER DAMPER

COMNC NO COM NC NO

C

ZONE B –5 AMP

NO

120

24

SEPARATE

ZB

C

VAC

VAC

SUPPLIES

ZONE B

ZONE B DAMPER

ZONE B

ZONEZONE43

TRANSFORMER

ZONE 2

DAMPER

COM NC NO

SIZE FOR TOTAL NUMBER OF

DAMPERS

SPARE FUSE –5 AMP

DAMPERS WIRED TO ZONE B

5

4

3

2

1

DAMPER OUTPUTS

8028 DAMPER POWER

ZONE 1

DAMPER

COM NC NO

DISTRIBUTION PANEL

	ZONE PANEL
ZONE 1 DAMPERS	WIRE ZONE PANEL ACCORDING
	TO THE INSTRUCTIONS PROVIDED
(“home run” wiring)	WITH THE ZONE PANEL

DIAGRAM 2 - One Transformer Serving Two Zones

DAMPER

TRANSFORMER

TWO ZONE SYSTEMS:

SIZE USING THE ZONE WITH THE MOST DAMPERS

SYSTEMS W/MORE THAN 2 ZONES:

SIZE USING TOTAL DAMPERS IN BOTH ZONES

12024

VAC VAC

SET SWITCH

FOR SINGLE

WIRE DAMPERS AS SHOWN IN DIAGRAM 1

		5	4	3	2	1
		ZONE A
	DAMPERS
		SINGLE		ZONE A –5 AMP
POWER A	SINGLE	SUPPLY
						ZA
POWER B				ZONE B –5 AMP
		SUPPLIES				ZB
		SEPARATE

ZONE A

NO

C NO

C

ZONE B

ZONE 1 ZONE 2 ZONE 3 ZONE 4

DAMPER	COM NC NO
DAMPER	COM NC NO
DAMPER	COM NC NO
DAMPER	COM NC NO

SUPPLY AND WIRE TO SINGLE (POWER A)

INPUTS

ZONE B	ZONE PANEL
DAMPERS	WIRE ZONE PANEL
SPARE FUSE –5 AMP	ACCORDING TO THE
5 4 3 2 1
8028 DAMPER POWER DISTRIBUTION PANEL	INSTRUCTIONS PROVIDED
	WITH THE ZONE PANEL

DIAGRAM 3 - Two Transformers Serving One Zone

ZONE A DAMPER			WIRE DAMPERS AS SHOWN IN DIAGRAM 1
								INSTALL JUMPERS
TRANSFORMER			5	4	3	2	1
								BETWEEN ZONE A AND
SIZE FOR TOTAL NUMBER OF			ZONE A
DAMPERS WIRED TO ZONE A								ZONE B INPUTS
		DAMPERS
DAMPER OUTPUTS
			SINGLE		ZONE A –5 AMP
120	24	SINGLE	SUPPLY						ZONE A
VAC	POWER A							ZA	C
	VAC								NO
	POWER B		SUPPLIES		ZONE B –5 AMP				NO
									ZONE B
120	24		SEPARATE					ZB	C
VAC	VAC
ZONE B DAMPER			ZONE B
TRANSFORMER
		DAMPERS						SPARE FUSE –5 AMP
SIZE FOR TOTAL NUMBER			5	4	3	2	1
OF DAMPERS WIRED TO
ZONE B DAMPER OUTPUTS

8028 DAMPER POWER DISTRIBUTION PANEL

ZONE 4	DAMPER	COM NC NO
ZONE 3	DAMPER	COM NC NO
ZONE 2	DAMPER	COM NC NO
ZONE 1	DAMPER	COM NC NO

ZONE PANEL

WIRE ZONE PANEL ACCORDING TO THE INSTRUCTIONS PROVIDED WITH THE ZONE PANEL

10006652	08.05	PO Box 1467 • Madison, WI 53701-1467 • Phone 800/334-6011 • Fax 608/257-4357 • www.aprilairecontractor.com
B2203856A

©2005 Research Products Corporation Printed in USA