15
Installation and operation manual
–
DTHR-V9-2020
Warning
All electrical connections must be performed by a qualified electrician in accordance with the
electrical diagram provided with the unit following applicable local laws and regulations. Also refer to
Electrical codes CSA C22.1 for Canada and ANSI/NFPA #70 for the United States. The operating
sequence described by the wiring diagrams or in the PLC should never be changed without the
approval of the manufacturer.
Always use copper wire with the proper size suited for the application.
The unit is already pre-wired at factory. Refer to the wiring diagram for remaining wiring connections:
•
Main 120V/60Hz/1ph ac power supply (see wiring diagram for current);
•
On/Off contact for heating demand. This heating demand must be wired in series with at
least one of the following but not limited to; a motor contactor auxiliary switch, an air
proving switch or another air flow device. Do not cycle this contact.
•
2-10 VDC modulation signal.
Component minimum operating temperature requirement
Warning
Every component requires a minimum ambient temperature during operation. If you don’t order
the
Nagas
heating and control cabinet solution you must build your own. Also, every component
must be protected from environmental elements and covered because of high voltage hazard.
Minimum operation temperature
Zone A
Zone B
Zone C
0
o
C (32
o
F)
-20
o
C (-4
o
F)
-40
o
C (-40
o
F)
Components
Electrical controls
