Document No: LT0255 F3200/NDU AS4428.1 Installation Manual
Applications
Issue 1.04 30 June 2004 Page 6-5
CIRCUITS & ZONES (CONTINUED)
For options A and C in Fig 6.1.3, configure circuit Alarm Text as "manual" and voltage band
B1 as "Instant Alarm" (refer to table below).
Voltage Default Program Fan
Band
State State Control
B5 Fault Switch wiring open circuit
B4 Normal "Auto"
B3 Normal "Auto"
B2 Alarm "Off"
B1 Inst Alarm "On"
Configure the zone as non-Latch, Status, non-Anc1/Warning System/External Bell.
In output logic, "off" is ZnD, "On" is ZnM, (for AZC number n).
For Option B in Fig 6.1.3, configuration is similar but in the output logic, "off" is ZnF and "on"
is ZnA.
For two AZC inputs:
┌──┐
┌───────●─────────────────────────────┤ │+
│ ┌┴┐ └──┘
OFF o │ │2K7 AZC 1
└┬┘ ┌──┐
AUTO o───o───●─────────────────────────────┤ │-
┌┴┐ └──┘
ON o │ │2K7
│ └┬┘ ┌──┐
└───────●─────────────────────────────┤ │+
└──┘
AZC 2
┌──┐
│ │-
└──┘
FIG 6.1.4
FAN CONTROL WITH TWO AZCs & ROTARY (OR CENTRE-OFF) SWITCH
Program B1 for both AZCs as "Instant Alarm", Alarm Text as "Manual".
Zone 1 Alarm "Fan Control Off"
Zone 2 Alarm "Fan Control On"
Both Normal "Fan Control Auto"
Configure both zones as non-Latch, Status, non-Anc1/Warning System/External Bell.
Fan Inputs
The exact requirement depends on the particular fan motor controller, and the contacts
available (e.g. "Run", "Fault"). Commonly "Run" is provided by an air flow switch (AFS), and
is required to connect to an AZC so that it can become part of a logic equation (as per
circuits 3 & 4 of standard module 1945-1-1/4 following).
To Next Page
Loading...
