Aprilaire 8028 Installation Instructions & Application Sheet

WARNING
1. 120 volts may cause serious injury from electrical shock. Leave
power to all system components disconnected until installation
is complete
Voltage
Max. Damper Power Input per Zone
Damper Fuse Size
Control Input Current Draw (Zone A and Zone B)
Max. No. of Aprilaire Dampers per Zone
Max Wire Size
Application Temperature/RH
Damper Power Input(s)
from Transformers
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.
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.
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.
INSTALLATION INSTRUCTIONS & APPLICATION SHEET
SPECIFICATIONS
5 4 3 2
ZONE A
DAMPERS
SINGLE
ZONE A – 5 AMP
SUPPLY
SINGLE
ZONE B – 5 AMP
SEPARATE
SUPPLIES
ZONE B
DAMPERS
5 4 3
MODEL 8028 DAMPER POWER DISTRIBUTION PANEL
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.
24 VAC ±20%
100VA max @ 24 VAC
5A Fast Acting (spare supplied)
50 mA @ 24 VAC
10 (refer to Diagram 3 on the back if there are
more than 10 dampers in a zone)
18 AWG
158°F / 90% RH (non-condensing)
1
ZA
ZB
SPARE FUSE – 5 AMP
2 1
Dampers Wired to ZONE A and ZONE B Terminals
Zone LED's
CAUTION
Control Input(s) from
Zoned Comfort Control
ZONE A
Panel
NO
C
NO
C
ZONE B
Power Supply Switch