Installation Instructions

Document No. 550-154
Installation Instructions
October 26, 2016
Siemens Industry, Inc. 3 of 7
NOTE:
If the controller is being installed on a
box with 1 or more stages of electric
heat, the 550-809 MOV with pre-
terminated spade connectors must be
installed across the manufacturer-
supplied airflow switch. MOVs can be
installed at the time the controller is
factory mounted; coordinate with the
box manufacturer prior to order
placement. For field installation, see
Metal Oxide Varistor Kit Installation
Instructions
(540-986).
NOTE:
A low-cost temporary RTS (540-
658P25) is available that plugs into
the RTS port on the controller,
providing temperature input and
actual space control until a
permanent RTS is installed.
Installation Instructions
NOTE:
All wiring must conform to national
and local codes and regulations
(NEC, CE, etc.).
1. Secure the mounting rail in the controller’s
desired location.
2. Place the ESD wrist strap on your wrist and
attach it to a good earth ground.
3. Remove the controller from the static proof bag
and snap it into place on the mounting rail.
4. Connect the FLN.
5. Connect the point wiring (see Wiring Diagram s).
6. Plug the room temperature sensor cable into the
RTS port.
7. Connect the power trunk. DO NOT apply power
to the controller without first consulting the
specialist. This TEC is designed to work with 2-
wire AC power (Neutral and Phase (hot) at 24
Vac +/-20%. Use of the earth terminal is optional
and if used it should be connected to the nearest
earth ground (building steel, conduit or duct work
(if earthed)).)
CAUTION
It is very important that the neutral
that supplies the TEC be earth
grounded at the source of the 24
Vac power.
Possible erratic equipment
operation or damage if neutral is
left floating.