User Guide

ManualsBrandsSiemens ManualsHVAC Replacement PartsThrough-the-Wall Outside Air Sensor (-58°F to 122°F)

Installation Instructions

Document No. 538-495

March 17, 2005

Outside Air Sensor,

4 to 20 mA

Product Description

The Outside Air Sensor provides a 4 to 20 mA input

for temperature control to a controller.

Product Number

536-768 –58°F to 122°F (–50°C to 50°C) range

Required Tools

• Power screwdriver with standard screw

chuck or medium flat-blade screwdriver

• Wire cutter/stripper

• Drill and drill bits

Expected Installation Time

Two hours

Prerequisites

• The appropriate field wiring, within the

maximum wiring run length for the individual

field panel or equipment controller, should

be pulled through the conduit to a utility box

near the sensor location.

• Verify the distance between the utility

mounting box and the outlet end of the

pulling elbow. If the distance is less than

22 inches (56 cm), follow Option A. If the

distance is greater than 22 inches (56 cm),

and less than six feet (1.8 m), follow

Option B.

NOTE: The distance between the utility

mounting box and the pulling elbow

cannot exceed six feet (1.8 m).

• The preferred sensor location is the north

side of the building, in the shade, where the

sensor is protected from direct or indirect

sunlight and drafts from exhaust vents, etc.

Instructions

NOTE: All wiring must comply with National

Electrical Code (NEC) and local regulations.

Option A Installation

NOTE: If replacing an existing sensor, disconnect

the positive (+) 26V supply lead of the field

wiring from the controller termination board

or block.

1. Use an existing opening or drill an opening

through the outside wall for 1/2-inch (13 mm)

rigid conduit. The sensor must be located three

to six inches (7.5 to 15 cm) from the wall

2. Feed the sensor leads through the rigid conduit

to the utility box located on the inside of the

building. Thread the pulling elbow/sensor

assembly onto the conduit as shown in Figure 1.

3. Rotate the sensor so that the shield points down

and shades the sensing element from direct and

indirect sunlight.

Figure 1. Outside Air Sensor, Option A Installation.

Item Number: 538-495-05, Rev. 011 Page 1 of 3

Summary of content (3 pages)

PAGE 1
Installation Instructions Document No. 538-495 March 17, 2005 Outside Air Sensor, 4 to 20 mA Product Description Instructions The Outside Air Sensor provides a 4 to 20 mA input for temperature control to a controller. NOTE: All wiring must comply with National Electrical Code (NEC) and local regulations. Product Number Option A Installation 536-768 NOTE: If replacing an existing sensor, disconnect the positive (+) 26V supply lead of the field wiring from the controller termination board or block.
PAGE 2
Document No. 538-495 Installation Instructions March 17, 2005 Instructions, Continued 4. Connect the sensor leads, at the utility box, to the appropriate transmitter wires. See Figure 2 and Table 1. 5. Connect the field wiring from the controller to the transmitter. The positive (+) 26V supply lead goes to the PWR wire of the transmitter and negative signal lead goes to the SIG wire. See Figure 2 and Table 1. 2. Remove the pulling elbow cover. 3. Pull the sensor lead wires from the pulling elbow.
PAGE 3
Document No. 538-495 Installation Instructions March 17, 2005 Instructions, Continued 12. Connect the field wiring at the controller. See Figure 4 and Table 1. 11. Remove the protective cover from the doublesided tape on the transmitter, and mount the unit onto the utility box cover. Install the cover onto the utility box. The installation is now complete. Figure 4. Analog Temperature Transmitter Wiring Connections for 4 to 20 mA Sensors (Option B). NOTE: 1.