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8 Modulation Damper and Pressure Switches

The fan damper is wired via a plug and socket arrangement. The socket is connected to the

assembly via a bracket.

Release the loose plug and

remove the cap via two screws.

Connect

the

incoming

cable from the Control panel

onto terminals L3 and GND,

ensuring correct orientation.

Connect the incoming 4-20mA

cable

from

the

modulation

thermostat onto

terminals L1

and GND, ensuring correct

orientation.

Refer to low voltage external

wiring diagram for control panel

and

modulation

thermostat

terminations.

Replace the cap and plug into

socket.

SCHEMATIC DIAGRAM

PRESSURE SWITCH CONNECTIONS

The pressure switch is attached to the damper

assembly

Release the plastic cap via two screws.

Connect the incoming cable to terminals:

1 - normally closed contact

3 - common contact

Refer to low voltage external wiring diagram for

control panel terminations.

Replace the plastic cap via two screws.

24V

FIXED CONNECTION

SOCKET

24V AC LINE

VOLTAGE

FROM PANEL

CONTRACTORS

CONNECTION PLUG

4 - 20mA

FROM

THERMOSTAT

PRESSURE

SWITCH