Honeywell Prestige THX9000 System Installation Manual page 7

System-specific wiring guides
Humidification systems
Steam humidifier (or any humidifier with its
own transformer) [3,
Rc Power [1]
R [R+Rc joined by jumper] [2]
U1 Humidifier relay [5]
Humidifier relay [5]
U1
Deumidification systems
Whole house dehumidifier [7]
Rc Power [1]
R [R+Rc joined by jumper] [2]
U2 Dehumidifier relay [5]
U2 Dehumidifier relay [5]
Ventilation systems
Whole house powered ventilator
Power [1]
R
U1 Ventilator relay [5]
Ventilator relay [5]
U1
[1] Power supply. Provide disconnect means and overload protection as required.
[2] Remove jumper (R to Rc) for systems with two transformers. Common connection must come
from cooling transformer.
[3] If using a humidifier that is wired directly to the thermostat, set humidification control to Wired
in Installer Setup.
[4] If using a wireless adapter (THM4000R) with a TrueSTEAM humidifier, set humidification
control to Wireless in Installer Setup. Connect nothing to thermostat U1 terminals.
[5] Terminals are normally open dry contacts.
[6] In Installer Setup, set dehumidification setting to Whole House Dehumidifier.
[7] In Installer Setup, set dehumidification setting to Dehumidify with Air Conditioner.
[8] Terminals are normally closed dry contacts.
[9] Equipment must include dehumidification terminal for low-speed fan.
4]
Bypass, flow-through humidifier (or any
humidifier that uses the system trans-
former) [3]
Rc Power [1]
[R+Rc joined by jumper] [2]
R
U1 Field jumper R to U1 [5]
Humidifier relay [5]
U1
A/C with low-speed fan [7]
Rc Power [1]
R [R+Rc joined by jumper] [2]
U2 Field jumper Rc to U2 [8]
U2 Dehumidifier relay [8,9]
Non-powered ventilator
R Power [1]
Field jumper R to U1 [5]
U1
U1 Ventilator relay
7
See [notes] below.
See [notes] below.
See [notes] below.
69-2057EFS—03