Connect The Control Wires To The Hvac/Zone System And Thermostats - Aprilaire 8800 System Installation Manual

CONNECT THE CONTROL WIRES TO THE HVAC/ZONE SYSTEM AND THERMOSTATS

A qualified HVAC technician should perform
this step to ensure proper termination.
1. Make sure the HVAC system power is off.
2. The Thermostat Installation Instructions
show wiring diagrams for several different
HVAC equipment types. Use FIGURES
3-5 as a reference only. Use color coding
where possible.
Refer to the thermostat installation manual
for check-out procedure and other wiring
details
DO NOT TURN ON THE HVAC
SYSTEM POWER YET!
FIGURE 3 – Conventional Heat/Cool
SINGLE TRANSFORMER
(USE JUMPER WIRE)
COMMUNICATION
TERMINALS
B+ A+ B- A- C
FIGURE 4 – Heat Pump
SINGLE TRANSFORMER
(USE JUMPER WIRE)
NOTE: "O" is active
in cooling and "B" is
active in heating.
COMMUNICATION
TERMINALS
B+ A+ B- A- C
FIGURE 5 – Humidistat
DRY CONTACT
8024
OR
REMOVE
JUMPER
COMMUNICATION
FOR DRY
TERMINALS
CONTACT
HUMIDIFIER
B+ A+ B- A- C B O Y Y2
B O Y Y2 G RC R W2 W
OR
B O Y Y2 G RC R W2 W
W = Humidifier Control
OR
Remove jumper for dry contact control.
Y = Dehumidifier Control
Use Aprilaire Model 8024 relay card or
equivalent for dry contact control.
Note: If you use a dry contact humidifier
without a dehumidifier, you will have to
provide 24VAC to the RC and C terminals
in order to power the thermostat.
G RC R W2 W L S2 S1 T1 T2
SUPPORT
MODULE
L S2 S1 T1 T2 RSB RSA
SUPPORT
MODULE
L S2 S1 T1 T2 RSB RSA
SUPPORT
MODULE
RSB RSA
7