8
Figure 8 - Fire alarm signal connections / permanent bridge. Ports: Fire al.
A
IR DAMPER ACTUATOR
VVSc or VVSs supply-exhaust air handling units are equipped with two air dampers
– one for supply, the other one for
exhaust air tier. Both of the dampers are power supplied and controlled from the same location on the terminal block. The
damper actuators will be connected to the Ports: Dampers G, Dampers G0, D02 of the switchboard. Mind, that both of the
actuators will be connected in parallel, using the 3-way lever connector (attached together with the actuators), as shown on
Figure 9 (3-way lever connector shown in low-left corner of).
Figure 9 - Connection of the Air Damper Actuator to the switchboard; Ports: Dampers G, Dampers G0, D02
A
NTI
-
FREEZE THERMOSTAT FOR WATER HEATER ON THE AIR SIDE
The anti-freeze thermostat on the air side monitors air temperature directly downstream the heating coil and triggers the
AHU defrosting mode if necessary. Its terminals must should be connected to the
“Heater al.” port, terminals G0, DI2, as
shown on the Figure 10.
