tekmar 062 RTU User Manual

- Data Brochure

D 062

Room Temperature Unit (RTU) 062

The tekmar Room Temperature Unit (RTU) 062 consists of an air temperature sensor, a liquid crystal display (LCD) and four buttons. These buttons and the LCD are used to set and view the desired room temperature. The RTU’s LCD displays the current room temperature, the outdoor air temperature and a number of other items.

The 062 can only be used with tekmar controls that are tekmar Net™ capable (tN1 or tN1 / tN2) terminals. The items that the 062 displays depends on the type of tekmar control that the RTU is connected to. To determine the exact items that are displayed by the RTU, refer to the Data Brochure for the control that the 062 is to be used with. In cases where a restricted temperature range is required, the RTU’s range can be limited by changing the access level of the RTU.

Installation

STEP ONE

Place a small screwdriver or similar object into the small slot located in the top of the RTU enclosure. Push the screwdriver down against the plastic tab and pull the top of the front cover so that it pivots around the bottom edge of the RTU. The back cover provides the base to which the front of the RTU mounts. Store the front of the RTU in a safe place until wiring must be completed.

REMOVING THE FRONT COVER

05/07

STEP TWO

MOUNTING THE RTU

The RTU should be installed on an interior wall of the desired zone to be controlled. Do not mount the RTU in a location that may be affected by localized heat sources or cold drafts. It may be necessary to install a draft barrier behind the enclosure in order to prevent air from blowing through the wiring hole and affecting the RTU reading.

Mount the RTU directly to the wall using two #6-1” screws. The screws are inserted through the mounting holes and must be securely fastened to the wall. If possible, at least one of the screws should enter a wall stud or similar surface. If local code requires that the RTU be mounted to a 2” x 4” electrical box, order an Adapter Plate 007. This plate will mount to the electrical box and the RTU will then mount to the plate. Ensure that the electrical box does not provide cold air to the RTU.

To Control

#6 1” screws

STEP THREE

WIRING THE RTU

Run 18 AWG twisted pair or similar wire between the RTU and the control. Insert the wires through the hole provided in the back of the RTU enclosure and connect them to the Com and the tekmar Net™ (tN1) terminals. Do not run the wires parallel to telephone or power lines as this may interfere with the operation of the RTU. If the RTU wires are located in an area with strong sources of electromagnetic noise, shielded cable should be used or the wires can be run in a grounded metal conduit.

NOTE: Do not apply power to the RTU. The RTU is powered by the control. The connection between the control and the RTU is polarity sensitive. The Com terminal of the RTU must be connected to the Com terminal of the control and the tekmar Net™ (tN1) terminal of the RTU must be connected to the appropriate tekmar Net™ (tN1) terminal of the control. If the wires are reversed, the display on the RTU will remain blank and the control will display a short circuit error for the tekmar Net™ (tN1) device.

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