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Installation
Combination Waterflow/Supervisory Zone
A combination Waterflow/Supervisory circuit allows an FACP to distinguish between an Alarm
switch (waterflow device) and a Supervisory switch (tamper) installed on the same circuit. The
following figure illustrates the wiring of Zone 2 as a Style B (Class B) Waterflow/Supervisory
circuit. Note that only Zone 1 on the Flex 402 and Zone 2 on the Flex 404 can be configured in this
manner.
Supervisory Switch
(tamper)
Supervisory Switch
(tamper)
1.2 KΩ, ½ watt resistor P/N: 75579
Figure 2.5 Style B Combination Circuit on Zone 2 of the Flex 404
Requirements for the Combination Waterflow/Supervisory circuit are as follows:
The Waterflow Alarm Switch(es) must connect to the FACP Initiating Device Circuit before
the In-Line Resistor as shown in Figure 2.5
The Waterflow Supervisory Switch(es) must connect to the FACP Initiating Device Circuit
after the In-Line Resistor as shown in Figure 2.5
Program the FACP Initiating Device Circuit #1 on the Flex 402 or Circuit #2 on the Flex
404 as a Combination circuit by placing SW1 DIP switch 8 to the ON position as described
in "SW1 DIP Switch Settings" on page 33
Waterflow Alarm Switch activation causes the panel to latch into alarm until the alarm
condition is cleared and the FACP is reset
Supervisory Switch activation causes the panel to track the supervisory condition, that is,
the panel will clear when the supervisory condition is cleared (if FACP is programmed for
Autoresettable Supervisory)
20
Class B Initiating Device Circuits (supervised and power-limited)
4.7 KΩ, ½ watt resistor P/N:71252
In-Line-Resistor
Alarm Switch
(waterflow)
Flex 402 & Flex 404 Instruction Manual — P/N 52194:D4 3/27/2015
Input Circuits
Dummy load all unused
circuits - 4.7 KΩ, ½ watt
resistor (P/N: 71245)
Note: Zones 3 & 4 on
Flex 404 only
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