tekmar 152 User Manual

Page 1

- Data Brochure

No power

D 152

Two Stage Setpoint Control 152

The tekmar Two Stage Setpoint Control 152 is a microprocessor-based control that independent setpoint temperatures to cycle heating or cooling devices on and off.

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

Setpoint

HEAT

Delay

Differential

A Universal Sensor 071 sensor is supplied with the control. The wire to the sensor may be extended up to 500 ft. (150m) by standard 18 AWG low voltage wire. The control can operate as a two stage setpoint control with a single sensor connected or as two independent one stage setpoint controls with two sensors connected. The display will indicate a sensor fault whenever a sensor is either open or short circuited.

Technical Data

Technical speciﬁcations

Dimensions

Gross Weight — 1 lb (450g) Ambient — -20 to 120 °F ( -30 to 50 °C)

Power supply — 24 V (ac) ± 10% 50/60 Hz 3 VA

Relay capacity — Sensor —10 kΩ @ 77°F (25° ± 0.2°C),

Control accuracy — ± 0.5° F ( ± 0.3°C) at

Settings

Temperature Display — -85 to 302°F (-65 to 150°C) Setpoint 1 — -40 to 239°F (-40 to 115°C) Differential 1 — 1 to 40°F (1 to 22°C) Time delay 1 — 0 to 19 min 50 sec Operating mode 1 — Heating/Cooling Setpoint 2 — -40 to 239°F (-40 to 115°C) Differential 2 — 1 to 40°F (1 to 22°C) Time delay 2 — 0 to 19 min 50 sec Operating mode 2 — Heating/Cooling Temperature scale — Fahrenheit/Celsius Programmed settings — Ten year memory backup

— 2-7/8" x 4-3/4" x 7/8"

(74 x 120 x 22 mm)

< 90% RH non-condensing

24 V (dc) ± 10% 0.03 A

240 V (ac) 10 A 1/3 hp

curve 3, NTC thermistor accurate with up to 500 ft. (150m) of 18 gauge wire

70°F (21°C)

Programming

mode indicator

Heating mode

indicator

Item

identiﬁers

Item selection and

display button

Wiring Chamber;

Terminals for 24Vac

power supply and

control circuit

for heating/

cooling device(s)

Hole for mounting screw

Meets Class B: Canadian ICES FCC Part 15

Made in Canada

tektra 906-03

Setpoint Differential Delay

Item

Two Stage Setpoint

2 Sensors

Control 152

3 4

–––

Power

Oﬀ

Relay 1 Rel ay 2

C– R+

Hole for mounting screw

Power: 24 V (ac) ± 10% 50/60 Hz 3 VA

24 V (dc) ± 10% 0.03A

Relay: 240 V (ac) 10 A 1/3 hp

Signal wiring must be rated at least 300 V.

56789

can be programmed

Temperature, Time delay and Differential Display

°C o r °F indicators

Cooling mode indicator

Programming and display buttons

Date Code

Sen

Wiring Chamber; Terminals for Sensor(s)

No power

Com

SenS1Sen

H1095F

12/08

with two

Sequence of Operation

• When the Two Stage Setpoint Control 152 is powered-up

will then monitor either sensor (S1) or sensor (S2) temperature and display the temperature on the digital display. Pressing and releasing the Item button will toggle between the sensor (S1) and sensor (S2) temperature readings when two sensors are used. (See diagram)

Two Sensor Operating Mode

2 Sensors

Dip Switch Up

When two sensors are used, sensor (S1) controls output relay 1 and sensor (S2) controls output relay 2.

• If the control setpoint 1 and/or 2 is programmed for “Heat”

and shows the “HEAT” display element when the sensor temperature is (a) — 1/2 the differential setting below the setpoint,

(b) — the delay has timed out. When the

and

sensor temperature rises 1/2 the differential setting above the setpoint, the relay switches off and the delay starts to time out.

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

CONTROL RELAY (HEATING)

Desired temperature this example 160°F(71°C)

WarmerCooler

OFF ON

the control turns on the relay

Temperature

a r

155°F(68°C)

Time

Differential

this example

165°F(74°C)

10°F(5°C)

Page 2

• If the control setpoints 1 and/or 2 are programmed for “Cool”

when the sensor temperature is (a) — 1/2 the differential setting above the setpoint,

the control turns on the relay and shows the “COOL” display element

(b) — the delay has timed out. When the

and

sensor temperature drops 1/2 the differential setting below the setpoint, the control switches its relay off and the delay starts to time out.

Single Sensor Mode

When using a single sensor, the sensor controls the action of both output relays. Any combination of “HEAT/HEAT” , “HEAT/COOL”, “COOL/COOL” may be utilized. When using the Two Stage Setpoint Control 152 in a “HEAT/COOL” installation with only a single sensor, a 3 °F difference must be programmed between the heat setpoint plus 1/2 its differential, and the cool setpoint minus 1/2 its differential for operation. This ensures that the heating and cooling systems cannot operate at the same time.

2 Sensors

Dip Switch Down

Desired temperature this example 4 0 °F ( 4 °C )

WarmerCooler

Temperature

CONTROL RELAY (COOLING)

ON OFF

e r

t a r

35°F(2°C)

Time

T e

Programming Examples

off

79 °F + 1/2 diff 1

76 °F Setpoint 1

73 °F

-1/2 diff 1

70 °F +1/2 diff 2

68 °F Setpoint 2

66 °F

-1/2 diff 2

Stage 1

102 °F

+ 1/2 diff 1

100 °F

Setpoint 1

98 °F

-1/2 diff 1

2 Stage Heat

off

Control

Stage 2

off

99 °F + 1/2 diff 2

97 °F Setpoint 2

95 °F

- 1/2 diff 2

2 Stage Cool

Control

Stage 1

79 °F +1/2 diff 2

78 °F Setpoint 2

77 °F

off

-1/2 diff 2

81 °F

+ 1/2 diff 1

80 °F

Setpoint 1

79 °F

-1/2 diff 1

Stage 2

off

Heat/Cool

Control

Stage 1 Cool

minumum 3 °F

difference required

Stage 2 Heat

Differential

this example

1 0 °F ( 5 °C )

45°F(7°C)

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 152 includes:

Other information available:

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(s) 071 according to the instructions in Data Brochure D 070 and run the wiring back to the control but do not connect.

• Install a 24 V power supply, and run the wiring from the power supply to the control with 24 V (ac) power. A Class 2 trans-

former must be used. Do not connect any of the transformer terminals to ground.

• Install the wiring from the heating/cooling device(s) control circuit(s) to the appropriate relay on the control.

• One Control 152 • One Universal Sensor 071

• Data Brochure D 152 • Data Brochure D 001 • Data Brochure D 070 • Appl. Brochure A 152

• Essay E 001

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 28Vac be measured at any of the wires connected to this control.

Page 3

Test the sensor

Th e control automatically goes back to operating mode when the buttons are left alone for 20 seconds

This test must be performed

(s)

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 070.

Test the power supply

• Ensure that the wires from the power supply transformer are not touching each other, any other wires or ground. power and, using an AC voltmeter, you should measure between 20 and 28 volts at the secondary side of the transformer.

• Turn off the power and complete the electrical connections to the terminal strip of the control.

Electrical connections

Turn on the

Power and output connections — Caution, Maximum 24 Volts A.C. or D.C.

Connect: — the power supply to terminals

— the heating/cooling device circuit 1 to terminals — the heating/cooling device circuit 2 to terminals

C — R

+(1 and 2)

Relay 1 Relay 2

(3 and 4) (5 and 6)

Sensor connection(s) — Caution, voltage is never applied to these terminals

Connect: Sensor

Sensor

071 to terminals 071 to terminals

S1 Sen and Com S2 Sen and Com

(7 and 8) (7 and 9)

Optional

Max. 24

10A

Volts

1C–2R+34

Power

24V power supply

Relay 1

Heating/Cooling device circuit #1

10A

Relay 2

Heating/Cooling device circuit #2

Do not apply

power here

Com

Sen

Settings

The digital display on the Two Stage Setpoint Control 152 has the following uses:

• To display the actual temperature(s) during normal operating mode.

• To allow the user to view and program the various control settings.

• To display control operation. ("HEAT" display element comes on when either relay closes to operate a heat source and "COOL" display element comes on when either relay closes to operate a cooling device.)

• To display sensor faults. (Display will show "Err" when a sensor is either disconnected, short circuited or out of temperature range.)

• To display program faults. (Display will show "Prgm Err" when the “Heat/Cool” single sensor mode is incorrectly programmed.)

The following diagram illustrates how to operate the keypad buttons in order to view settings and program the control.

POWER ON

When the control is powered-up, all display elements turn on.

After approximately 5 seconds, the control automatically goes into operating mode.

PRGM

Setpoint

1 2

HEAT COOL

Differential

OPERATING MODE

When in operating mode, the actual sensor temperature(s) are displayed.

2 Sensors

If two sensors are are in use.

Dip Switch Up

Push and Release

"Item" button. The display will toggle between sensor 1 and 2.

the

HEAT COOL

HEAT

Item

Delay

F C

Push and Hold

button. The programmed Delay 1 and then Delay 2 will be displayed.

PROGRAM MODE

Push all three buttons

same time.

appear and the Setpoint (1) pointer will ﬂash. The control will be in programming mode.

Pushing the "Item" button changes the ﬂashing pointer to Differential (1)

the

"PRGM 1" will

Item

at the

PRGM

Setpoint

PRGM

Item

Push or to change Setpoint

Differential

Push or to

change Differential

COOL

Delay

Pushing the "Item" button, "PRGM 2" appears, and the Setpoint (2) pointer will ﬂash.

Item

Pushing the "Item" button

changes the ﬂashing pointer to Differential (2)

Item

Pushing the "Item" button changes the ﬂashing pointer to Delay (2)

Item

PRGM

Setpoint

PRGM

Push or to

change Setpoint

Push or to

change Differential

Push or to

change Delay

DISPLAY MODE

Push and Hold

button. The programmed Setpoint 1 and then Setpoint 2 will be displayed.

the "Item"

Setpoint

Pushing the "Item" button

Item

COOL

changes the ﬂashing pointer to Delay (1)

Item

PRGM

Push or to

change Delay

Delay

Pushing the "Item" button allows Heating or Cooling (2) operation to be selected

Item

PRGM

Push or to select between

Heating or Cooling operation

Sen

Sensor

#1 (071)

Differential

HEAT COOL

Sen

Sensor

#2 (071)

Delay

Push and Hold

button. The programmed Differential 1 and then Differential 2 will be displayed.

the

Differential

Item

COOL

Pushing the "Item" button

allows Heating or Cooling (1) operation to be selected

Item

PRGM

COOL

Push or to select between

Heating or Cooling operation

Pushing the "Item" button allows the Fahrenheit or Celsius scale to be selected

Item

The control automatically goes back to operating mode when the buttons are left alone for 20 seconds

PRGM

Push or to select between

Fahrenheit or Celsius scales

F C

Page 4

Differential

Setting the Differential on any control depends entirely on the actual operating characteristics of heating/cooling equipment in a speciﬁc application. Differential settings should normally be set as small as possible for greatest accuracy, but care must be taken to avoid short cycling of equipment. Experience, plus trial and error during actual operating conditions is usually the way most installers determine the correct differential setting.

Delay

Setting the Time Delay also depends on the actual operating characteristics of heating/cooling equipment in a speciﬁc application. With some equipment, time delays are unnecessary and the delay setting can be set to zero time delay. Other types of equipment depend on a ﬁxed off delay to prevent damage to equipment components, particularly in the case of certain types of refrigeration equipment. Consult the manufacturer's operating and installation instructions for advice on recommended time delays.

Testing and Troubleshooting

If troubleshooting becomes necessary with the Two Stage Setpoint Control 152, follow the testing procedure in step four of the installation procedure on page 2 of this brochure.

If the display window shows “Err 1” or “Err 2”, sensor (S1) or (S2) is either open circuited, short circuited, or the sensor temperature is outside the temperature range of the control. If this type of fault occurs, the control will turn off its relays in order to shut down the heating or cooling equipment it is controlling.

If the display window ﬂashes “prgm Err” when using a single sensor, the “heat/cool” differential setting is to small. Check setpoints and differentials to ensure that at least 3 °F exists between the heating setpoint plus 1/2 its differential and the cooling setpoint minus 1/2 its differential.

If you do not think the control is operating properly, check to see that the settings have been made correctly and that the problem is not a result of external causes. Make sure that all wiring connections are solid and the sensor(s) is located in the correct location.

Before you leave

• Install the wiring cover over the wiring chamber and secure it with the screw provided. • Place the front cover on the control to cover the setting dials and snap it into place. • Place this brochure, and all other brochures relating to the installation, in the protective plastic bag supplied with the control. • Place the bag in a conspicuous location near the control for future reference. • It is important to explain the operation of this control within the system to the end user, and anyone else who may be operating the system.

Limited Warranty and Product Return Procedure

Limited Warranty The liability of tekmar under this warranty is limited. The

Purchaser, by taking receipt of any tekmar product (“Product”), acknowledges the terms of the Limited Warranty in effect at the time of such Product sale and acknowledges that it has read and understands same.

The tekmar Limited Warranty to the Purchaser on the Products sold hereunder is a manufacturer’s pass-through warranty which the Purchaser is authorized to pass through to its customers. Under the Limited Warranty, each tekmar Product is warranted against defects in workmanship and materials if the Product is installed and used in compliance with tekmar’s instructions, ordinary wear and tear excepted. The pass-through warranty period is for a period of twenty-four (24) months from the production date if the Product is not installed during that period, or twelve (12) months from the documented date of installation if installed within twenty-four (24) months from the production date.

The liability of tekmar under the Limited Warranty shall be limited to, at tekmar’s sole discretion: the cost of parts and labor provided by tekmar to repair defects in materials and/or workmanship of the defective product; or to the exchange of the defective product for a warranty replacement product; or to the granting of credit limited to the original cost of the defective product, and such repair, exchange or credit shall be the sole remedy available from tekmar, and, without limiting the foregoing in any way, tekmar is not responsible, in contract, tort or strict product liability, for any other losses, costs, expenses, inconveniences, or damages, whether direct, indirect, special, secondary, incidental or consequential, arising from ownership or use of the product, or from defects in workmanship or materials, including any liability for fundamental breach of contract.

The pass-through Limited Warranty applies only to those defective Products returned to tekmar during the warranty period. This Limited Warranty does not cover the cost of the parts or labor to remove or transport the defective Product, or to reinstall the repaired or replacement Product, all such costs and expenses being subject to Purchaser’s agreement and warranty with its customers.

Any representations or warranties about the Products made by Purchaser to its customers which are different from or in excess of the tekmar Limited Warranty are the Purchaser’s sole responsibility and obligation. Purchaser shall indemnify and hold tekmar harmless from and against any and all claims, liabilities and damages of any kind or nature which arise out of or are related to any such representations or warranties by Purchaser to its customers.

The pass-through Limited Warranty does not apply if the returned Product has been damaged by negligence by persons other than tekmar, accident, ﬁre, Act of God, abuse or misuse; or has been damaged by modiﬁcations, alterations or attachments made subsequent to purchase which have not been authorized by tekmar; or if the Product was not installed in compliance with tekmar’s instructions and/or the local codes and ordinances; or if due to defective installation of the Product; or if the Product was not used in compliance with tekmar’s instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, WHICH THE GOVERNING L AW ALLOWS PARTIES TO CONTRACTUALLY EXCLUDE, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, DURABILITY OR DESCRIPTION OF THE PRODUCT, ITS NON-INFRINGEMENT OF ANY RELEVANT PATENTS OR TRADEMARKS, AND ITS COMPLIANCE WITH OR NONVIOLATION OF ANY APPLICABLE ENVIRONMENTAL, HEALTH OR SAFETY LEGISLATION; THE TERM OF ANY OTHER WARRANTY NOT HEREBY CONTRACTUALLY EXCLUDED IS LIMITED SUCH THAT IT SHALL NOT EXTEND BEYOND TWENTY-FOUR (24) MONTHS FROM THE PRODUCTION DATE, TO THE EXTENT THAT SUCH LIMITATION IS ALLOWED BY THE GOVERNING LAW.

Product Warranty Return Procedure All Products that are believed to have defects in workmanship or materials must be returned, together with a written description of the defect, to the tekmar Representative assigned to the territory in which such Product is located. If tekmar receives an inquiry from someone other than a tekmar Representative, including an inquiry from Purchaser (if not a tekmar Representative) or Purchaser’s customers, regarding a potential warranty claim, tekmar’s sole obligation shall be to provide the address and other contact information regarding the appropriate Representative.

tekmar Control Systems Ltd., Canada tekmar Control Systems, Inc., U.S.A.

Head Ofﬁce: 5100 Silver Star Road Vernon, B.C. Canada V1B 3K4 (250) 545 -7749 Fax. (250) 545-0650 Web Site: www.tekmarcontrols.com

All speciﬁcations are subject to change without notice.

Printed in Canada. D 152 - 12/08.