HEX390 Installation & Commissioning Instructions September 2016
9
Internal on/off Thermostat - Digital Controller
The thermostat should be disabled for digital
controller, as the digital controller should control all
airflows.
Internal on/off Thermostat - Manual Controller
(Optional) The internal thermostat (2core cable
from the HEX unit) can be set so the unit turns off
if the temperature exceeded the set point (eg if
thermostat is set to 30, the unit will turn off if the
incoming fresh air is above 30ºC).
Return Air filter
Fresh Air filter
Optional
Internal On/Off
Thermostat
Electrical
Supply
230VAC
by installer
Electrical supply must be installed
by a registered electrician as per the
schematics on pages 10-11.
Heater Connection
Return Air
(Shielded, don't cut)
Cables
The 5 core cable (fan loom) goes to the
attic box , for both manual and digital
versions.
The 2 core cable (internal thermostat) is
optional for the manual controller - leave
unconnected for digital version.
5 core cable
Fan loom
2 core cable
internal thermostat
(optional for manual
controller only)
