Electrical Connections For Additional Field Supplied Damper; Power Supply Connection, Control Wire Terminals And Switches On The Pcb - Daikin VAM350J7VEB Installer And User Reference Manual

6 Installation
m
o
o
X35A
X24A
j
q
q
c
q
a Switch box
b PCB
c Switch box cover
d Securing screw and washer
e Grounding terminal
Installer and user reference guide
20
a
i r n h
c
f Terminal board
g Transmission wiring terminal board (P1, P2, F1, F2)
h Transmission wiring (to optional controller)
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
b
6.5.3 Electrical connections for additional field
supplied damper
An external damper prevents the intake of outdoor air when the heat
f
reclaim ventilation unit is switched off.
The heat reclaim ventilation main unit's PCB operates the heat
k
reclaim ventilation unit and provides a contact for an external
damper.
d
+
e
d
X24A
c
m
PCB
a
a Heat reclaim ventilation main unit
b External damper
l
c External damper earthing
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 PCB
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.
o
i
l
n
h
b
page 17.
VAM350~2000J7VEB
Heat reclaim ventilation unit
4P487293-1A – 2018.05