Smoke Detector Customer Low Voltage Wiring - American Standard YSC036A Installation, Operation And Maintenance Manual

Smoke Detector
Customer Low Voltage
Wiring
When interlocking System Sensor
smoke detectors together, all of the
detectors must be powered from the
same power supply. If the smoke
detectors are powered up by
different power supplies, harmonics
are set up and will fry the boards in
some, if not all, of the detectors.
If multiple smoke detectors are
required, all detectors must be
disconnected from the HVAC unit
power supply and connected
together from another single source
supply.
Note: Do not interconnect any
smoke detectors together
that have separate power
supplies. Do not exceed ten
smoke detectors on one
power supply.
Note: Multiple System Sensor
smoke detectors are
connected together using
terminals 1 and 12 on each
detector.
30
If you have supply and return smoke
detectors in all HVAC units, you can
connect a maximum of 5 HVAC units
(10 detectors) up to one power
supply. See the following field wiring
example.
Figure 34. Up to 5 HVAC units
Installation
If you have more than 5 HVAC units,
you can connect all the supplies
together on one power supply (up to
10 HVAC units), and all the returns
together (up to 10 HVAC units) on
another power supply. See the
following field wiring example.
Figure 35. Up to 5 HVAC units
RT-SVX21F-EN