Aprilaire 8028 installation instructions Specifications, Switch Settings and LED’S

MODEL 8028 DAMPER POWER DISTRIBUTION PANEL

INSTALLATION INSTRUCTIONS & APPLICATION SHEET

WARNING CAUTION

1.120 volts may cause serious injury from electrical shock. Leave power to all system components disconnected until installation is complete

1.Installation must be done in accordance with the NEC and all other applicable local codes.

2.To prevent excessive transformer heating, do not power more than the recommended number of dampers to a transformer.

SPECIFICATIONS

Voltage	24 VAC ±20%
Max. Damper Power Input per Zone	100VA max @ 24 VAC
Damper Fuse Size	5A Fast Acting (spare supplied)
Control Input Current Draw (Zone A and Zone B)	50 mA @ 24 VAC
Max. No. of Aprilaire Dampers per Zone	10 (refer to Diagram 3 on the back if there are
	more than 10 dampers in a zone)
Max Wire Size	18 AWG
Application Temperature/RH	158°F / 90% RH (non-condensing)

Damper Power Input(s) from Transformers

		5	4	3	2	1
		ZONE A
	DAMPERS
		SINGLE		ZONE A –5 AMP
POWER A	SINGLE	SUPPLY					ZA	ZONE A
								NO
								C
POWER B				ZONE B –5 AMP				NO
		SEPARATE					ZB	C
		SUPPLIES						ZONE B
		ZONE B
	DAMPERS

SPARE FUSE –5 AMP

5 4 3 2 1

Control Input(s) from Zoned Comfort Control Panel

Dampers Wired to ZONE A and ZONE B Terminals

SWITCH SETTINGS AND LED’S

Set to SINGLE SUPPLY when used:

• in a two zone system when there are no more than 10 dampers in either ZONE A or ZONE B.Power Supply Switch Size the transformer for the zone with the most dampers.

•when there are no more than 10 total dampers wired to ZONE A plus ZONE B. Size the transformer

for the total number of dampers connected to both zones.

When set to SINGLE SUPPLY, wire transformer to “POWER A” terminals. Refer to Diagram 2 on the back for wiring.

Set to SEPARATE SUPPLIES for all other applications. Wire transformers to “POWER A” and “POWER B” terminals. Refer to Diagram 1 on the back.

Zone LED’s

ZA LED lights when 24-volts is applied to the ZONE A control input.

ZB LED lights when 24-volts is applied to the ZONE B control input.