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
F
1
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
On
3 4
1
2
–––
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
S2
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,
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
e
p
m
e
T
e
s
i
r
e
r
u
t
155°F(68°C)
Time
Differential
this example
165°F(74°C)
T
e
m
p
e
r
a
t
u
r
e
f
a
10°F(5°C)
l
l
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
s
i
r
e r
u
t a r
e
p
m
e
T
35°F(2°C)
Time
T e
m
Programming Examples
on
off
off
on
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
on
Control
Stage 2
off
99 °F + 1/2 diff 2
97 °F Setpoint 2
95 °F
on
- 1/2 diff 2
2 Stage Cool
Control
Stage 1
on
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
on
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)
p
e
r
a
t
u
r
e
f
a
l
l
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.
2
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
6
5
Relay 2
Heating/Cooling device circuit #2
Do not apply
power here
7
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
1
HEAT COOL
2
HEAT
Item
Delay
F C
FC
F
F
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
Item
at the
PRGM
Setpoint
PRGM
1
Item
1
Push or to change Setpoint
1
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
F
F
changes the flashing pointer to Differential (2)
Item
Pushing the "Item" button changes the flashing pointer to Delay (2)
Item
PRGM
Setpoint
PRGM
PRGM
2
Push or to
change Setpoint
2
Push or to
change Differential
2
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
1
Item
F
COOL
changes the flashing pointer to Delay (1)
Item
PRGM
1
Push or to
change Delay
Delay
Pushing the "Item" button allows Heating or Cooling (2) operation to be selected
Item
PRGM
2
Push or to select between
Heating or Cooling operation
89
S1
Sen
Sensor
#1 (071)
Differential
HEAT COOL
S2
Sen
Sensor
#2 (071)
F
F
Delay
Push and Hold
button. The programmed Differential 1 and then Differential 2 will be displayed.
the
1
Differential
Item
COOL
Pushing the "Item" button
F
allows Heating or Cooling (1) operation to be selected
Item
PRGM
1
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
3
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
Product design, software and literature are Copyright © 2008 by: tekmar Control Systems Ltd. and tekmar Control Systems, Inc.
4
All specifications are subject to change without notice.
Printed in Canada. D 152 - 12/08.
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