(
06/06
)
STEA
SERIES
Installation, Operation & Maintenance Manual
15
Control wiring
The STE control system allows up to two sensors to
be connected, as well as various safety devices, remote on/off,
alarm and serial communications.
Generally, the control sensor or humidistat (HT) is located in the
room or return air duct. In the case where the STE
uses a direct discharge blower unit, this is the only control
needed. In ducts or air handlers, a high limit humidistat or
sensor is usually added to act as a safety (CR), as well as an
air flow proving device. The remote terminal HumiVisor (MT)
may be added.
Remote Supervisor / Serial
Communications:
This is a standard RS485
serial connection. It is
recommended to keep wiring under 3,200
feet. Request SATS’s communications
documentation for additional information
on this option.
Control wiring is made directly to the
control board terminals:
1.
terminal block G (dehumidification
contact);
2.
terminal block H (alarm contact);
3.
terminal block K (on/off, manual drain
switch);
4.
terminal block I (control signals);
5.
terminal block J (to remote terminal or
supervisory system);
6.
dip-switch for selecting TA RATE.
For On/Off Operation:
Connect any simple humidistat, high-limits, air flow
switch, and remote contacts in series from terminals
7I to 8I.
Circuits must be completed from 4I to 5I by a jumper
and from 7I to 8I for the unit to operate. Use
jumpers if devices are not connected.
Parameter A0 must be set to 0.
