Terminal Block Connection And Remarks - Hitachi DXF-2.0A1 Operation Installation Maintenance Manual

5.5 Terminal Block Connection and Remarks
Terminal Block 1
Terminal Description
L, N,
Power Supply
earth
Fan Control Signal by
Wired controller
(1)
N1, N1: N-Neutral phase terminal
L1, L1: Low fan speed signal
M1, M1: Medium fan speed
H1
signal
H1: High fan speed signal
(2)
Electrical preheating
L2, N2
M.AL: Fan Motor Alarm
(3)
L3, N3 Signal
EXP. VALVE: Connecting
(4)
1 to 5 Expansion Valve Wires
(5)
V/ Duty Signal
A,GND
Terminal Block 2
Terminal Description
(6)
FS: Float Switch
5, 6
(7)
Input Signals 1
, COM
(7)
, COM Input Signals 2
(8)
Output Signals 1
, COM
(8)
Output Signals 2
, COM
(8)
Output Signals 2
, COM
Transmission wiring to
(9)
1, 2 outdoor and indoor unit
Transmission wiring to
(9)
A, B wired controller
(10)
Inlet Air Thermistor (*)
THM1
(10)
Outlet Air Thermistor
THM2
(10)
Liquid Pipe Thermistor
THM3
(10)
Gas Pipe Thermistor
THM5
* For Duty signal control insert the wire of THM1 from PCB2. Refer to Fig.2 in Section 5.3 for the detail.
(1) Short-circuit the terminals of L1, M1, H1 and connect the terminal H1 if the fan motor is one tap. Short-circuit the terminals of L1,
M1 and connect the terminals H1, M1 if the fan motor is 2 taps. The terminals of L1, M1, H1 need to be short-circuited with jumpers
before shipment.
(2) The PREHEATING signal (L2, N2) outputs will be turned ON when ambient temperature is below 0°C .
(3) Alarm occurs if the M.AL terminal (L3, N3) of fan motor alarm signal is activated. The terminal needs to be short-circuited with a
jumper before shipment. Be careful to high voltage (over 220 V) impressed to the line.
(4) Number links from 1 to 5 must match between the terminals of EXP. VALVE and the wires of the expansion valve box. In case that
the wires supplied with expansion valve box are not long enough, please make sure that the length extension is properly done
avoiding the sensing distortion and that the joint is properly insulated and waterproof to avoid any electrical failure.
(5) Duty signal terminal (V/A, GND) needs to be connected to the field supply controller.
(6) Alarm occurs and PREHEATING signal (L2, N2) outputs turned ON automatically if the FS terminal (5, 6) of float switch signal is activated.
The terminal is short-circuited with a jumper before shipment, please keep short-circuited state.
(7) Refer to Section 6.3 for the definition of input signals. Make the wires for input signals are as short as possible. DO NOT install the
wires along the power supply wire of AC 220 V to AC 415 V. Install the wires separately at a distance of more than 30cm. If you install
the wires along the power supply wire, insert the wires in a metal conduit tube and ground one end of the wire.
(8) Refer to Section 6.3 for the definition of output signals. Make sure the allowable current in the limitation.
(9) Use a shielded cable for transmission circuit and connect it to ground.
(10) Thermistor cable should be located at least 50 mm away from power supply wires. If not following the guideline, it may result in
malfunction due to electrical noise.
22
Connect to Type of cable
Power source H05RN-F
Sheathed PVC
Relay for AHU fan
cable
Sheathed PVC
Electrical preheater
cable
Overload (thermal)
Sheathed PVC
protector for fan
cable
motor
Sheathed PVC
Expansion valve box
cable
Field-supplied Sheathed PVC
controller cable
Connect to Type of cable
Sheathed PVC
Float switch
cable
Sheathed PVC
External controller
cable
Sheathed PVC
External controller
cable
Outdoor and indoor
unit
Shielded Twist Pair
Cable
Wired controller
Sheathed PVC
cable
Cross
Maximum
section
length (m)
(mm 2 )
Power source: 220-240V ~ 50/60Hz
3 x 2.5
maximum current 5.0 A
Signal output, compatible with AC
4 x 0.75
power source, maximum 2.5 A
Signal output, compatible with AC
2 x 0.75
power source, maximum 1.5 A
Signal input, Free contact between
terminals L3 and N3, compatible
2 x 0.75
with AC power source, maximum 2.5
A
5 x 0.5 10 Digital output, 12 V DC
Digital input, 0-10 V DC, 0-5V DC,
2 x 0.5
4-20mA
Cross
Maximum
section
length (m)
(mm 2 )
Digital input, Free contact between
2 x 0.5 10 terminals 5 and 6, 12 V DC maximum
1.2 mA
Digital input, Free contact between
terminals
maximum 10 mA
2 x 0.5 50
Digital input, Free contact between
terminals
maximum 10 mA
Digital output, 12 V DC,
2 x 0.5 50
maximum 33 mA
2 x 0.75
THM1 on PCB1
THM2 on PCB1
2 x 0.5 10
THM3 on PCB1
THM5 on PCB1
Specifications
Specifications
and COM, 12 V DC
and COM, 12 V DC
P5417151-rev.1