– 28 –
Hydro Unit
Installation Manual
Remote controller installation
NOTE
• The remote controller wire should not be bundled
with other wires (mains, etc.), or installed with other
wires in the same conduit, as malfunction may
result.
• Install the remote controller away from sources of
electrical interference and electromagnetic fields.
• If electrical interference is unavoidable,
countermeasures such as appropriate filtering
should be employed.
1. For removal of the remote controller’s lower
case (rear case), insert the tip of a straight blade
screwdriver, or the like, into the two openings at
the bottom of the remote controller to open the
lower case.
2. Fix the remote controller’s rear case by wood
screws (2 pcs.). Do not over tighten, as it may
damage the rear case.
3. Connect the wires from the Hydro unit to the
remote controller terminal block.
(Refer to “How to wire the remote controller”.)
Connect the wires of the remote controller
following the terminal numbering convention of
the Hydro unit to prevent miss wiring. (Do not
apply AC 208-230V mains voltage to the remote
controller as it will be damaged.)
Remote controller wiring
Connection diagram
Second remote controller installation
requirements
Installation
For a dual remote controller system, install the remote
controllers in the following way.
1. Set one of remote controllers as the header
remote controller. (Remote controller of hydro
unit is preset as Header (DIP SW1 = OFF).)
2. Set the DIP switch on all other remote controller
P.C. boards to Second. (Optional remote
controller is preset as Second (DIP SW1 = ON).)
Wiring slot
Lower case
(Rear case)
Wood screws
Remote controller
Cover
<Remote controller
(Rear)>
A
B
A
B
Remote controller wiring
(Locally procured)
Wood screws
Terminal block
(TB07) for remote
controller wiring in
Hydro unit
* Terminals A and B are non-
polar.
* Use 0.5 mm
2
wire
* Can not use the closed end
wire joint.
Remote controller
Remote controller
(inside, rear)
DIP switch
DIP switch
DIP switch
Header remote
controller/Hot
water
temperature
Header remote
controller/
Room
temperature
Second remote
controller/Hot
water
temperature
Second remote
controller/
Room
temperature
DIP switch
28-EN
Summary of Contents for HFC series
Page 47: ...EF99808601 ...