Hitachi RAC-35WPC, Technical Catalogue

Page: 39 / 42

OPTION LIST
37
1 10.3. DRY CONTACT (SPX-WDC3) APPLICATION (USING DIP SWITCH)
The dry contact system enables the operation of the air conditioner indoor unit to be controlled by using external dry contacts
(with non voltage) such as card-key controller or window for facilities such as hotels.
Optional Connecting cord Accessory SPX-WDC3
Note:
1) DRY CONTACT function is "Enable" by set pin No. 2 of
the DIP SWITCH (DSW1) to ON position.
2) Select the proper setting for DRY CONTACT LOGIC
INPUT pin No. 3 on DIP SWITCH (DSW1)
i) Set to OFF position (Hi Input) if the type of Dry Contact
switch to be used (for the CARD KEY UNIT or Window)
is of contact type a (Normally Open Type) as shown in
below diagram.
ii) Set to ON position (Lo Input) if the type of Dry contact
switch to be used (for the CARD KEY UNIT or Window)
is of contact type b (Normally Close Type) as shown in
below diagram.
ON
䊾
OFF
Pin
No.
Function Switch Position / Setting
2
DRY CONTACT
function
OFF Disable ON Enable
3
DRY CONTACT
Input Logic
OFF
HI Input
Active
ON
LO Input
Active
x
Please decide the type of dry contact you will be using and set the position of the DIP Switch No. 2 and 3 accordingly
[1] CHECK DRY CONTACT OF CARD KEY UNIT [2] SET THE POSITION OF DIP SWITCH
AIR CONDITIONER
S
Standby
AIR CONDITIONER
O
Operating
POSITION CONDITION OF DIP SWITCH
CARD KEY
(Door
Switch)
REMOVE INSERT
INITIAL CONDITION
(CARD KEY NO USE)
Contact
type a
OPEN CLOSE
Contact
type b
CLOSE OPEN
After all connection has been done as below diagram, ON the breaker and push ON button of wireless remote controller or
wired remote controller to operate the air conditioner unit.
x
When the CARD KEY is in insert condition, the air conditioner operation is allowable by remote controller.
x
When the dry contact switch on the Card Key Unit is open (refer to diagram below for contact type a), the unit stops to
operate (it takes 10 seconds to stop the unit operation after the dry contact switch on the card key turns off) and vice
versa.
x
When the card key is removed from the Card Key Unit, the wireless remote controller cannot be used.
x
When the card key is removed from the Card Key Unit, the wired remote controller LCD display is activated; however it
has no control over the unit.
x
The suitable accessory Connecting Cord (accessory code#: SPX-WDC3) need to be used to connect the Card Key Unit’s
dry contact switch to the connector on the control board of the indoor unit
HI Input Active
LO Input Active
DIP SW ((DSW1)
Dry Contact side
(no polarity)
Connecting cord
SPX-WDC3
Main PWB side
(CN6 terminal)