Smoke Detector Customer Low Voltage Wir; Ing; Space Temperature Averaging - Trane TSC037E 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.
Figure 49. Up to 5 HVAC units
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.
RT-SVX22M-EN
Figure 50. Up to 10 HVAC units
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.

Space Temperature Averaging

(ReliaTel™ only)
Space temperature averaging is accomplished by wiring a
number of remote sensors in a series/parallel circuit.
Using the BAYSENS016* or BAYSENS077*, at least four
sensors are required to accomplish space temperature
averaging.
• Example #1 illustrates two series circuits with two
sensors in each circuit wired in parallel.The square of
any number of remote sensors is required.
• Example #2 illustrates three sensors squared in a
series/parallel circuit. Using BAYSENS077*, two
sensors are required to accomplish space temperature
averaging.
Example #3 illustrates the circuit required for this sensor.
Table 8, p. 40 lists the temperature versus resistance
coefficient for all sensors.
Installation
37