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PO Box 1467 • Madison, WI 53701-1467 • Phone 800/334-6011 • Fax 608/257-4357 • www.aprilairecontractor.com
©2005 Research Products Corporation
Printed in USA
10006652 08.05
B2203856A
ZONE A
ZONE B
SINGLE
SINGLE
SUPPLY
SEPARATE
SUPPLIES
ZONE A – 5 AMP
ZONE B – 5 AMP
SPARE FUSE – 5 AMP
54321
ZONE B
DAMPERS
ZONE A
DAMPERS
12345
120
VAC
24
VAC
ZONE A DAMPER
TRANSFORMER
120
VAC
24
VAC
ZONE B DAMPER
TRANSFORMER
POWER
A
POWER
B
8028 DAMPER POWER
DISTRIBUTION PANEL
ZONE 1 DAMPERS
(“home run” wiring)
DAMPER TRANSFORMER
SIZING
TRANSFORMER MAX. NO. OF
VA RATING
DAMPERS
40 VA 4
50 VA 5
75 VA 7
100 VA 10
SIZE FOR TOTAL NUMBER OF
DAMPERS WIRED TO ZONE A
DAMPER OUTPUTS
SIZE FOR TOTAL NUMBER OF
DAMPERS WIRED TO ZONE B
DAMPER OUTPUTS
ZA
ZB
ZONE 2
DAMPERS
ZONE 1
DAMPER
ZONE 2
DAMPER
ZONE 3
DAMPER
ZONE 4
DAMPER
COM NC NOCOM NC NOCOM NC NOCOM NC NO
ZONE PANEL
C
NO
C
NO
(“daisy chain” wiring)
DAMPER
MOTOR
WIRE ZONE PANEL ACCORDING
TO THE INSTRUCTIONS PROVIDED
WITH THE ZONE PANEL
ZONE B
SINGLE
SINGLE
SUPPLY
SEPARATE
SUPPLIES
ZONE A – 5 AMP
ZONE B – 5 AMP
SPARE FUSE – 5 AMP
54321
ZONE B
DAMPERS
ZONE A
DAMPERS
12345
ZONE 1
DAMPER
ZONE 2
DAMPER
ZONE 3
DAMPER
ZONE 4
DAMPER
120
VAC
24
VAC
DAMPER
TRANSFORMER
COM NC NOCOM NC NOCOM NC NOCOM NC NO
POWER
A
POWER
B
ZONE PANEL
8028 DAMPER POWER DISTRIBUTION PANEL
SET SWITCH
FOR SINGLE
SUPPLY AND
WIRE TO SINGLE
(POWER A)
INPUTS
TWO ZONE SYSTEMS:
SIZE USING THE ZONE WITH
THE MOST DAMPERS
SYSTEMS W/MORE THAN 2
ZONES:
SIZE USING TOTAL
DAMPERS IN BOTH ZONES
ZONE A
ZA
ZB
C
NO
C
NO
WIRE DAMPERS AS SHOWN IN DIAGRAM 1
WIRE ZONE PANEL
ACCORDING TO THE
INSTRUCTIONS PROVIDED
WITH THE ZONE PANEL
ZONE A
ZONE B
SINGLE
SINGLE
SUPPLY
SEPARATE
SUPPLIES
ZONE A – 5 AMP
ZONE B – 5 AMP
SPARE FUSE – 5 AMP
54321
ZONE B
DAMPERS
ZONE A
DAMPERS
12345
120
VAC
24
VAC
ZONE A DAMPER
TRANSFORMER
120
VAC
24
VAC
ZONE B DAMPER
TRANSFORMER
POWER
A
POWER
B
8028 DAMPER POWER DISTRIBUTION PANEL
C
NO
SIZE FOR TOTAL NUMBER OF
DAMPERS WIRED TO ZONE A
DAMPER OUTPUTS
SIZE FOR TOTAL NUMBER
OF DAMPERS WIRED TO
ZONE B DAMPER OUTPUTS
ZA
ZB
ZONE 1
DAMPER
ZONE 2
DAMPER
ZONE 3
DAMPER
ZONE 4
DAMPER
COM NC NOCOM NC NOCOM NC NOCOM NC NO
ZONE PANEL
C
NO
INSTALL JUMPERS
BETWEEN ZONE A AND
ZONE B INPUTS
WIRE DAMPERS AS SHOWN IN DIAGRAM 1
WIRE ZONE PANEL
ACCORDING TO THE
INSTRUCTIONS
PROVIDED WITH THE
ZONE PANEL
DIAGRAM 1 - Two Transformers Serving Two Zones
DIAGRAM 2 - One Transformer Serving Two Zones
DIAGRAM 3 - Two Transformers Serving One Zone