MTA NGSi 05, Technical Manual, Page: 52 / 58

TECHNICAL MANUAL
Chapter 20
- CRH remote keypad (optional accessory)
NGSi 05÷15
50
ENGLISH
EN
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited
C
HAPTER
20
CRH
REMOTE KEYPAD
(
OPTIONAL ACCESSORY
)
The CRH remote keypad allows the user to set the operating mode of chillers and fancoils connected in an RS485 network. The network may
consist of up to 5 cascade-connected chillers and up to 70 fancoils, subdivided into 9 temperature control zones. The keypad can be fixed to
the E503 inset wall-mounting boxes.
For further information, please refer to the specific manual for the CRH.
2 0 . 1 C o n n e c t i n g t h e C R H k e y p a d t o t h e m i n i c h i l l e r
The connection between the CRH panel, the minichillers and the terminal units is very simple: it is made using a series-connected 2x0.5mm
2
screened twisted pair.
C
HAPTER
21
D
OUBLE SETPOINT KIT
(
OPTIONAL ACCESSORY
)
2 1 . 1 S c o p e a n d f i e l d o f a p p l i c a t i o n
The double setpoint function adds a second working setpoint on the system side (in both cooling and heating modes).
They are mainly used in the case of underfloor cooling systems with dehumidification fan coils.
The purpose of the application is to prevent condensation from forming on the floor in any conditions and to ensure comfortable temperature
and humidity conditions at all times.
5: connect to the GNDR reference terminal of the
unit output terminal board;
6: connect to the R- output terminal of the unit
output terminal board;
7: connect to the R+ output terminal of the unit
output terminal board;
8: connect to the 12V- output terminal of the unit
output terminal board;
9: connect to the 12V+ output terminal of the unit
output terminal board.
ESC : back to previous
menu level
F1 : access to menus and
submenus
F2 : select unit and
modify parameter value
ENTER : access to
DOWN : decrease the
parameter value or
UP : increase the parameter
value or scroll menu
scroll menu
submenu and confirm
parameter value