Installation Instructions

ManualsBrandsSiemens ManualsSensors TemperatureDuct Point Temperature Sensors, Technical Specification Sheet

Document No. 129-515

March 20, 2007

Duct Averaging Sensors,

Short Rigid Probe, 4 to 20 mA

Item Number: 129-515, Rev. AA Page 1 of 2

Product Description

The temperature transmitter equipped Duct

Averaging Sensor assemblies sense the average air

temperature in ductwork where mixing baffles are

not provided or where stratification occurs. Each

sensor assembly mounts on sheet metal ducts.

Contents

• Short, rigid platinum RTD averaging element

• 4 to 20 mA transmitter

• Two wire nuts

• Electrical box for wiring connections

Product Numbers

Product

Number

Sensing

Element

Range

535-490-XX

100Ω Pt (385α)

20°F to 120°F

(-7°C to 49°C)

XX Probe Length in Inches (cm)

18 (46)

24 (61)

36 (91)

48 (122)

Caution Notations

CAUTION:

Equipment damage or loss of

data may occur if you do not

follow a procedure as

specified.

Required Tools

• Wire cutters

• Small 1/8-inch flat-blade screwdriver

• Medium flat-blade screwdriver

• Four No. 10 × one-inch sheet metal screws

• Electric drill and one-inch drill bit

• No. 27 drill bit for screw holes

Expected Installation Time

535-490-18 or 535-490-24 1.5 hours

535-490-36 or 535-490-48 2.0 hours

Prerequisite

Field wiring must be pulled to installation site.

Installation

1. Mark the location of four holes on the duct at the

place where the unit is to be mounted (see

Figure 3). Mark the location in the center of the

four mounting holes for a one-inch clearance

hole.

2. Drill the one-inch clearance hole. Switch drill bit

to the No. 27 bit and drill the four sheet metal

mounting screw holes in the duct.

3. Remove the 2-inch × 4-inch electrical box cover

on which the transmitter is mounted.

4. Pierce the rubber gasket for all four mounting

screw locations with the small screwdriver. Push

the mounting screws through the holes in the

gasket from the inside of the 2-inch × 4-inch

electrical box.

5. Place the unit on the duct into position and

fasten it in place with the four mounting screws.

CAUTION:

The 36-inch and 48-inch probes must be

supported within six inches of the tip of the probe.

6. Connect the conduit to the utility box.

7. Pull Field wiring to utility box.

8. Strip the field wires with wire cutters and

connect the positive (+) 26V lead wire to the

transmitter's PWR wire. Connect the signal lead

wire to the transmitter's SIG wire. See Figure 1

and Table 1.

9. Replace the 2-inch × 4-inch electrical box cover

on the transmitter assembly box.

The installation is now complete.

Summary of content (2 pages)

PAGE 1
Installation Instructions Document No. 129-515 March 20, 2007 Duct Averaging Sensors, Short Rigid Probe, 4 to 20 mA Expected Installation Time Product Description The temperature transmitter equipped Duct Averaging Sensor assemblies sense the average air temperature in ductwork where mixing baffles are not provided or where stratification occurs. Each sensor assembly mounts on sheet metal ducts.
PAGE 2
Document No. 129-515 Installation Instructions March 20, 2007 1/4-inch holes centered every 1/2-inch along the strip. This strap can be easily aligned so that a hole is present in the correct position to support the probe. Use No. 10 × one-inch sheet metal screws to secure the strap to the ductwork. With internal access to the duct, only two holes must be drilled in the duct. Without internal access to the duct, two holes and two one-inch slits must be cut in the duct as shown in Figure 2.