Panasonic PAW-280PAH3M-1, Руководство по установке

Страница: 99 / 114

99
AHU Kit – Installation Instructions – 11/2021
Electrical Wiring
5
As an alternative to using PAW-T10 terminals 1 and 2, it is also possible to use for example con -
tacts 1 to 4 in Section C of the main control board (“COM” and “DI1” to “DI3”). For correct use of
these contacts see →
5.3 Terminal board layout, p. 66
.
The wiring system shown in the diagram provides the following control functions:
● During the first 3 minutes after unit has been switched to “ON” (either by BMS or by
local remote controller), the delay timer relay will keep the PAW-T10 contacts closed
and operation is permitted.
● After the AHU fan has been started and while the air volume flow is sufficient, the air
flow switch will keep the PAW-T10 contacts closed so that operation continues.
● Once the set delay time has elapsed, the timer contact will be opened, but the
PAW-T10 contacts will stay closed due to the air flow switch relay.
● When the air volume flow drops below the lower limit, the air flow switch will open
the PAW-T10 contacts and the outdoor unit will stop operation. At the same time the
remote controller in the AHU unit will be locked to prevent unintentional operation.
● The minimum air volume flow should be set on the air flow switch according to the
required minimum air volume flow of each AHU Kit model.
Electric circuit example including a timer and air flow switch
Air flow switch
SET
AL1
OUT
ATU
PV
SV
ºC
ºC
PACi or ECOi/ECO G outdoor unit
AHU Kit
0–10
V capacity control
External control
system
Air Handling Unit (AHU)
Timer
L N 16 15 14
PAW-T10
L
N
30 56b
31
t
56b1
1
2
3
4
Main terminal board:
Terminals D4 and D5
PAW-T10: Terminals I (1) and I (2)