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VRF: Supply
Terminal G & L1 &L 2. The Dx-Controller should be connected to the main power supply by means of a switch with a contact
separation of at least 0.12inch. (Impulse voltage : 1500V 3minutes)
Digital Input 1 (ON / OFF)
Terminal C1 & C2. ON / OFF over a dry contact. If the contact is closed, the system switches on. If the contact is opened, the
system switches off. If the system is switched using the external contact, then switching ON / OFF using the remote control is
still possible.
Remote control BUS line (A / B)
Terminal A & B At these terminals an optional wired remote control can be attached (useful for installation and maintenance).
VRF: Inside device BUS line (U1 / U2 / G)
Terminal U1 & U2 & G Details regarding the wiring of the Central Control BUS can be found in the installation manual of the
VRF outdoor unit.
External safety Input
Terminal C7 & C8 If this contact is open for more than 1 minute, the error message P10 is generated and the ventilation kit
switches off automatically (Rating 12VDC). This contact can, for instance, be used with an on-site frost protection monitor.
If the External safety contact is not used, then the contact should be bridged.
Fan Error Input
Terminal C7 & C8. An operation monitor (supplied locally) of the Air Flow is to be attached at this terminal as a dry contact (for
instance, differential pressure monitor, vane relay or similar). A closed contact generates the error message L30.
Safety Input
Terminal C5 & C6. Factory setting is "CLOSED". This can be used as safety lock by external signal on 3
contact is "OPEN", system stops and generates the error code message P10.
Fan Operation Output
Terminal D1 & D2 (KP2). During Fan Motor operation, this signal is active..
Alarm signal Output
Terminal D5 & D6 (KP3). During Alarm status, this signal is active.
Thermo-ON Signal Output
Terminal D19 & D20 (KP8). During thermo-ON status, this is active.
Secondary Heating Signal Output (Cooling output)
Terminal D17 & D18 (KP9). Auxiliary heating output becomes active when thermo control status meats the condition.
VRF: Temperature sensors
The refrigerant temperature sensors are inserted into the brazed sensor holders (There are 2 sizes of refrigerant Sensors: Ø4 &
Ø6) and secured using the supplied SENSOR FIX-PLATE (There are 2 sizes of FIX-PLATE).
The sensor cables are to be attached as follows:
TC2/TC2
TC2 Sensor Ø6 (BLK Plug / BLK Vinyl Tube)
TCJ/TCJ
TCJ Sensor Ø6 (RED Plug / RED Vinyl Tube)
TA/TA
TA Sensor Resin (YEL Plug / BLK Vinyl Tube)
TC1/TC1
TC1 Sensor Ø4 (BRN Plug / BLU Vinyl Tube)
VRF: Pulse modulation valve (PMV)
The PMV connecting is as follows:
L01/L02/L03/L04/L05/L06
L07/L08/L09/L10/L11/L12
Maximum wire length of PMV wiring is 16ft.
PMV1 wiring
PMV2 wiring
Field Fitted to Dx-Controller
Field Fitted to Dx-Controller
Field Fitted to Dx-Controller
Field Fitted to Dx-Controller
Connecting to Dx-PMV kit
Connecting to Dx-PMV kit (28, 32ton normal coil only)
16
rd
party system. If this
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