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68 UNT-SVX07B-EN

Controls Interface

• Make sure that the 24 Vac power supplies are consistent in how they are grounded. Avoid

sharing 24 Vac between LonTalk UCMs.

• Avoid over-tightening cable ties and other forms of cable wraps. A tight tie or wrap could

damage the wires i

nside the cable.

• Do not run LonTalk cable alongside

or in the same conduit as 24 Vac power.

• In an open plenum, avoid lighting ballasts, especially those using 277 Vac.

• Do not use a trunk and branch configuration, if possible. Trunk and branch configurations

orten the distance cable can be run.

Wireless Temperature Sensor

Note: Receivers ship installed on the unit. To remove the receiver, press in the retention tabs on

the underside of the receiver enclosure (see Figure 18, p. 68) and push upward.

Address Setting

The process of establishing communication between a receiver and sensor is referred to as

association. The following limitations apply:

• Each associated receiver/sensor set that communicates within the rec

eption range of the

wireless system must have a unique address.

It is not possible to associate more than one sensor to a receiver, nor is it possible to associate more

than one receiver to a sensor.

To associate a receiver and sensor, the two devices must have their rotary address switches set to

the same address.

Important: Set the addresses before applying power to the receiver and before removing the

insulation strip (Figure 19, p. 69) from the sensor.

To set the receiver and sensor addresses:

1. Using a small screwdriver, set the three rotary address switches (locations S1, S2, S3) on the

receiver to an address between 001 and 999 (see Figure 19, p. 69). You do not have to remove

the covers to access the rotary address switches.

Note: Do not use 000 as an address. An address of 000 returns the receiver outputs to their

factory defaults (zone temperature and setpoint outputs: 72.5°F [22.5°C]), removes all

association knowledge, and prevents association with a sensor.

Figure 18. Retention tabs on underside of receiver enclosure

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