Deumidification systems, Ventilation systems – Honeywell PRESTIGE THX9000 User Manual
Page 7
7
69-2057EFS—03
Steam humidifier (or any humidifier with its
own transformer) [
3, 4
]
Rc
Power [
1
]
R
[R+Rc joined by jumper] [
2
]
U1
Humidifier relay [
5
]
U1
Humidifier relay [
5
]
Humidification systems
System-specific wiring guides
Bypass, flow-through humidifier (or any
humidifier that uses the system trans-
former) [
3
]
Rc
Power [
1
]
R
[R+Rc joined by jumper] [
2
]
U1
Field jumper R to U1 [
5
]
U1
Humidifier relay [
5
]
[
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.
Deumidification systems
Whole house dehumidifier [
7
]
Rc
Power [
1
]
R
[R+Rc joined by jumper] [
2
]
U2
Dehumidifier relay [
5
]
U2
Dehumidifier relay [
5
]
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
]
Whole house powered ventilator
R
Power [
1
]
U1
Ventilator relay [
5
]
U1
Ventilator relay [
5
]
Ventilation systems
Non-powered ventilator
R
Power [
1
]
U1
Field jumper R to U1 [
5
]
U1
Ventilator relay
See [
notes
] below.
See [
notes
] below.
See [
notes
] below.