Electrical Connections For Possible Additional Field Supplied Damper - Daikin VAM350J7VEB Installer And User Reference Manual

f Terminal board
g Transmission wiring terminal board (P1, P2, F1, F2)
h Transmission wiring (to optional user interface)
i Power supply cable
j Wires for connection of additional external damper
(supplied accessory)
k Insulated splices-closed barrel connector (0.75 mm²) (field
supply)
l Double or reinforced insulated flexible cable (0.75 mm²) to
external damper (field supply)
m Tie wrap (field supply)
n BRP4A50A (optional accessory)
o KRP2A51 (optional accessory)
p CO₂ sensor (optional accessory)
q Tapping screw
r Wires for fresh-up operation
6.5.3 Electrical connections for possible
additional field supplied damper
The external damper prevents the intake of outdoor air if the heat
reclaim ventilation unit is switched off.
The heat reclaim ventilation's main unit PCB operates the heat
reclaim ventilation and provides a contact for the external damper.
d
X24A
b
c
PCB
a
a Heat reclaim ventilation main unit
b External damper
c Earth to external damper
d Power source
CAUTION
Follow the instructions below carefully.
Required electrical connections
Connect one end of the accessory wire to the X24A connector on
the PCB and the other end to the wire leading to the external
damper via an insulated splices-closed barrel connector (0.75 mm²).
Make sure that the wire is NOT taut. The electrical circuit requires a
current protection of 3 A and a maximum voltage of 250 V.
X24A will close the contact when the heat reclaim ventilation fan
starts operating and it will open the contact when the fan is stopped.
6.5.4 Power supply connection, control wire
terminals and switches on the circuit
board
To connect the power supply
1 Connect the power supply to the L and N terminals.
2 Secure the power supply with the power supply clamp, as
shown in "6.5.2 Opening the switch box" on
3 Be sure to connect the earth wire.
VAM350~2000J7VEB
Heat reclaim ventilation unit
4P487293-1 – 2017.08
o
p
6.5.5
page 16.
Keep the following in mind:
▪ If stranded conductor wires are used, install a round crimp-style
terminal on the end of the wire. Place the round crimp-style
terminal on the wire up to the covered part and fasten the terminal
with the appropriate tool.
b
▪ Use the following methods for installing wires:
j
n m l k
J3 J2 J1 JC
J3 J2 J1 JC F2 F1 N/P2 P/P1
X5A X6A X12A X11A
NOR.
H M
NOR.
H M
SS1
SS1
q
F1U 6.3A
a Power supply
b Terminals
c Damper
d Damper (only VAM1500+VAM2000 bottom unit)
e External damper (field supply)
f Fan communications
g KRP2A51 (option)
h User interface
i Centralised control
j External input
k Outdoor air thermistor
l Indoor air thermistor
m Damper (only VAM1500+VAM2000 bottom unit)
n Damper
o BRP4A50A (optional accessory)
p CO₂ sensor
q Factory setting (No operation if setting is changed)
NOTICE
Factory settings: Do NOT change the switch settings when
a user interface is connected. SS1 is a setting switch to
operate without user interface. Changing the settings when
a user interface is connected, will stop the unit from
operating normally. Keep the switch on the PCB at the
factory setting.
Guidelines when connecting the electrical
wiring
a
a Stranded conductor wire
b Round crimp-style terminal
Installer and user reference guide
6 Installation
i h
F2 F1 P2 P1
g
f
e
d
c
b
L N
X27A
a
19