tekmar 153 User Manual

- Data Brochure

D 153

Mixing Setpoint Control 153

The tekmar Mixing Setpoint Control 153 is a microprocessor-based control with a ﬂoating action output intended to operate a mixing valve, damper, etc. through an actuating motor.

This reliable and versatile control has an adjustable throttling range and a very wide setpoint range that makes it useable in many different applications. The control has a digital LCD window that normally the actual sensor temperature and can be used to view the setpoint and other programmed settings.

Supply(1)

F C

Throttling

Return(2

A Universal Sensor 071 is supplied with the control. The wire to the sensor may be extended for any length up to 500 ft. (150m) by standard 18 AWG low voltage wire. When an optional return sensor is added, a minimum boiler return temperature can be constrained. The display will indicate a sensor fault whenever the sensor is disconnected or short circuited, or the return sensor is short circuited.

Technical Data

Technical speciﬁcations

Dimensions — 2-7/8" x 4-3/4" x 7/8"

(74 x 120 x 22 mm) Gross Weight — 1 lb (450g) Ambient — –20 to 120°F (–30 to 50°C)

< 90% RH non-condensing Power supply — 24 V (ac) ±10%, 50/60 Hz, 3 VA

24 V DC ±10%, 0.03 A Relay capacity — 240 V (ac), Max 10 A, 1/3hp Sensor — 10 kΩ @ 77°F (25 ± 0.2°C),

NTC thermistor, ß = 3892

accurate with up to 500 ft.

(150m) of 18 gauge wire Control accuracy — ± 0.5°F ( ± 0.3°C) at

70°F (21°C)

Settings

Temperature Display — –85 to 302°F (–65 to 150°C) Supply (1) Setpoint — –40 to 239°F (–40 to 115°C) Throttling Range — 16 to 67°F (9 to 37°C) Boiler Return (2) — –40 to 239°F (–40 to 115°C) Temperature Scale — Fahrenheit/Celsius Program settings — Ten year memory backup

Programming

mode indicator

Relay operation

indicators

Item

Identiﬁers

Item selection and

display button

Wiring Chamber;

Terminals for 24V (ac)

power supply and

control circuit

to actuating motor

Hole for mounting screw

Meets Class B: Canadian ICES FCC Part 15 Made in Canada tektra 906-07

PRGM

1 2

Supply (1)

Item

Mixing Setpoint Control 153

Power

C -

R +

Open

Pwr Mix

Mix

Floating Action

Hole for mounting screw

Power: 24 V ±10% 50/60 Hz 3 VA 24 V (dc) ±10% 0.03 A Relays: 240 V (ac) 10 A 1/3 hp

Throttling

Mix

Return (2)

No power

Com Sen

H1096F

Sup Sen

Temperature and Throttling range Display

° C or °F indicators

Programming and display buttons

Date Code

Ret Sen

Wiring Chamber; Terminals for Sensor(s)

12/08

shows

Sequence of Operation

• When the Mixing Setpoint Control 153 Floating Action is powered-up

control will then monitor sensor Supply (1) temperature. If a Boiler Return (2) sensor is connected, pressing and releasing the Item button will toggle the display between Supply (1) and Boiler Return (2) temperature readings.

Floating Action Operating Mode

•

If the relay Open (O) is constantly on,

the measured temperature is at least 1/2 the throttling range setting below the setpoint. The mixing valve should be opening or fully opened because more heat is required.

•

If the relay Close (C) is constantly on,

the measured temperature is at least 1/2 the throttling range setting above the setpoint. The mixing valve should be closing or fully closed.

•

Floating Action occurs when

the measured temperature is between these two

points (Throttling range).

the digital display will show all of the display elements. The

24 V (ac) Floating Action

Warmer

Desired Temperature Setting

BOTH RELAYS OFF; NO VALVE

Temperature

MOVEMENT

Cooler

Time

OPEN RELAY ON

CLOSE RELAY ON

Throttling Range

Supply Sensor Operating Mode

• If only a Supply Sensor is installed,

the control regulates the supply water temperature through applying a ﬂoating output signal to the actuating motor. Supply (1) adjustment sets the setpoint temperature. Adjusting the throttling range will set the temperature range in which ﬂoating output action occurs.

Supply and Boiler Return Sensor Operating Mode

• If a Boiler Return Sensor option is installed,

then whenever the measured boiler return water temperature is near the return minimum, the control starts to close the 4-way mixing valve in order to divert more hot water back to the boiler. The Return (2) indicator will be ﬂashing at a slow rate to indicate mixing valve is being controlled by the Boiler Return (2) sensor reading. When using a Boiler Return (2) sensor for minimum boiler return protection, it is essential that there always be water ﬂow past the Boiler Return (2) sensor whenever there is Supply (1) demand.

Heating System

Supply (1)

Sensor 071

153

Actuating

Motor

4-Way Valve

Boiler Return (2)

Sensor 071

Installation

Caution

Improper installation and operation of this control could result in damage to equipment and possibly even personal injury. It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards.

Step One Getting ready

Check the contents of this package. If any of the contents listed are missing or damaged, please refer to the Limited Warranty and Product Return Procedure on the back of this brochure and contact your wholesaler or tekmar sales agent for assistance.

Type 153 includes:

• One Control 153 • One Universal Sensor 071

• One Data Brochure D 153 • One Data Brochure D 001

Other information available:

• Essay E 001

Note: Carefully read the Sequence of Operation section in this brochure to ensure that you have chosen the proper control and

understand its functions within the operational requirements of your system.

Step Two

Mounting

The control is mounted in accordance with the instructions in the Data Brochure D 001.

Step Three

Rough-in wiring

All electrical wiring terminates in the two wiring chambers at the bottom front of the control. If the control is to be mounted on an electrical box, the wiring can be roughed-in at the electrical box prior to installation of the control (see Brochure D 001). Standard 18 AWG solid wire is recommended for all low voltage wiring to this control.

Caution: Power should not be applied to any of the wires during this rough-in wiring stage.

• Install the Universal Sensor 071 according to the instructions in Data Brochure D 070 and run the wiring back to the control but don’t connect.

• Install a 24V (ac) Class 2 transformer with a minimum 5 VA rating close to the control, and run the wiring from the transformer to the control.

A Class 2 transformer must be used. Do not connect any of the transformer terminals to ground.

• Or provide 24 V DC power of at least 0.03 A and run wiring to the control location.

• Install the wiring from the actuating motor to the control.

Step Four

Testing and connecting the wiring

Caution

These tests are to be performed using standard testing practices and procedures and should only be carried out by a properly trained and experienced technician.

A good quality electrical test meter, capable of reading from at least 0 — 200 Volts AC, and at least 0 — 2,000,000 Ohms, is essential to properly test this control.

At no time should voltages in excess of 28V be measured as power supply to this control.

Test the sensor

This test must be performed

power is applied to the control and

before

a sensor is connected to the terminal strip. Test

before

the sensor(s) according to the instructions printed in the enclosed Data Brochure D 001.

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