A.O. Smith Theta T Series Installation, User And Service Manual page 75

Installation-, User- and Service Manual
3.6.1 Preparation
Remove the cover (snap-on type) from the terminal block of the control. The connection
diagram below is under the cover.
Theta dual service module for BFC
Mount, using the 4 mounting holes in the housing, the controller as close as possible to
the water heater on a solid and firm surface.
Note
On the cover of the controller is a label with the coding HM 3.0. When this code is not on
the label present, you must contact A.O. Smith.
Theta dual service module for SGE en SGS
This controller is included with the SGE en SGS. The functionality of the Theta dual
service is enclosed in the controller of the solar system.
Note
Not all solar heating controllers are equipped with Theta dual service functionality. The
controller that is equipped with this functionality has a label on the cover of the controller
with the coding SHM 3.0. When this code is not on the label present, you must contact
A.O. Smith.
Note
Between terminal 5 and 18 is a brown wire mounted. This wire must remain installed at
all times.
3.6.2
Connecting the mains power (only BFC)
Note
Just as with the water heater controller, the dual service controller must have a
permanent electrical connection to the mains power supply. There must be a double-pole
isolator installed in the permanent connection. This is the same double-pole isolator as
installed between the mains power supply and the water heater itself. Whenever this
isolator is operated, both controllers can be switched on or off.
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