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F3200 Installation & Programming Manual Document No: LT0122
Applications
Page 9-6 5 July 2001 Issue 2.7
CIRCUITS & ZONES (CONTINUED)
Where a "Fault" contact is available, along with "Run", both can be put onto a single AZC
with the NO "Fault" contact shorting the AZC and voltage band B1 programmed as "Fault"
(refer to Fig 9.1.5 A). Alternatively, the NC "Fault" contact can be put in series for open
circuit Fault, and the NO "Run" contact can short the AZC, with B1 programmed as "Alarm"
(ZnD). (Refer to Fig 9.1.5 B). Note that in A, Fault overrides Run, and in B, Run overrides
Fault. The priority in B can be reversed, but not in A.
The zone should be configured as non-latching.
If a "run" contact is used to short a Zener across the AZC (i.e. run is B2 = Alarm) and the
normal state of the fan is "run", then the zone mapping to MAF should be configured as
"Status Only" so that the fan "Run" state is not shown in the "Totals" or "Alarm Recalls".
┌──┐ NC ┌──┐
┌───────┬────────┬───────┤ │+ ┌─────o───o──────┬───────┤ │+
│ RUN o FAULT o └──┘ │ FAULT o RUN └──┘
┌┴┐ NO / NO / ┌┴┐ / NO
│ │2K7 o o AZC │ │2K7 o AZC
└┬┘ ╒╧╕6V8 │ └┬┘ │ RUN
│ │ │OR │ │ │
│ └┬┘560E │ ┌──┐ │ │ ┌──┐
└───────┴────────┴───────┤ │- └────────────────┴───────┤ │-
A. └──┘ B. └──┘
FIG 9.1.5
EXAMPLE OF FAN RUN & FAULT WIRING TO AZC
9.1.3 RELAYS
The exact number of relays per fan control and the logic required depends on the particular
building and air conditioning plant.
Typically, one relay is required per fan to switch an interposing relay in the fan control
equipment, with a possible logic equation as follows:
R5 = Z15D + Z15N.Z5A i.e. ("off") or ("auto" and duct alarm)
(ie. the relay turns on to turn the fan off).
Where:Relay 5 is the Fan Control relay for a normally running fan
Zone 5 is the associated Air Duct Smoke circuit
Zone 15 is the associated Fan Control switch circuit with ...
Z15D (band B2) = "Fan Off"
Z15M (band B1) = "Fan On"
Z15N (bands B3, B4) = "Auto"
Note that the zone range facility is useful in programming controls where selective,
automatic switching is required. E.g. if zones 1-10 correspond to ducts in levels 1-10 of a
building, and the logic requires Relay 5 to operate if Zone 5 is in alarm but zones 1-4 and 6-
10 are not, the equation for R5 above would become: