Operation and Maintenance Manual (DTR) iSWAY
®
Set of products
Version 1.8 of 2.2021
130
Table 14.1. Dimensions of PZ1/2/3/4 connection boxes.
A
[mm]
B
[mm]
C
[mm]
D
[mm]
E
[mm]
PZ1
198
203
155
105
80
PZ2
198
203
155
105
80
PZ3
248
253
205
155
100
PZ4
308
283
265.4
185.4
129.5
24VDC power supply.
IP56 protection class.
Connection and wiring diagrams can be found in section 13.
NOTE!
If there is no 24VDC power supply on the actuators, check the fuse for the actuator. The
manufacturer allows the fuse to be replaced on your own. Keep the same fuse type (B-PICO/3A)
when replacing it. To replace the fuse, you have to: remove the top cover of the PZ box. Then
unscrew the two M5 screws so that the panel inside the PZ box can be removed. There are
ceramic cubes under the panel. There are fuses in the upper middle row. The exchange is the
same in all types of PZ boxes.
If PZ box malfunction is detected, inform the SMAY service immediately. Do not repair or replace
the box yourself. This can only be done by SMAY service or an authorised SMAY service.
15.5.
NMQ24A-SR actuator
The NMQ24A-SR actuator (Fig. 15.16) is designed to drive the SCR control dampers. The
MAC-D-Min controller is the source of the setpoint value for the actuator and controls its current
operating position via a feedback signal. The control and feedback signals are transmitted to/from
the MAC-D-Min regulator via connectors in the PZ box.
Fig.15.16. Control damper actuator
The actuator is powered by 24VDC through the connectors in the PZ box. For the supply tracks of
the damper blade actuators, a 3A quick-acting axial fuse is installed in the PZ box.
Connect the NMQ24A-SR to the PZ box with the original cable (0.6m) or extend the cable with a
specified cable (max. Length: 50m) and an additional installation box.
NOTE!
If there is no 24VDC power supply on the actuators, check the fuse for the actuator in the PZ box.
The manufacturer allows the fuse to be replaced on your own. Keep the same fuse type (B-
PICO/3A) when replacing it. The instructions for replacing the fuse can be found in the section