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086_D
Humidity & Temperature Sensor 086
Accessories
08/12
Replaces: New
Installation & Operation Manual
Introduction
The Humidity & Temperature Sensor 086 can be connected to select tekmar
thermostats to remotely measure relative humidity and temperature. The 086
mounts flush or nearly flush to the wall to allow the sensor to visually blend in
with the surrounding wall.
Actual Size
A Watts Water Technologies Company
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© 2012
086_D - 08/12
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Installation
Caution
Improper installation and operation of this control could result in damage to the
equipment and possibly even personal injury or death. It is your responsibility
to ensure that this control is safely installed according to all applicable codes and
standards. Please follow these step-by-step instructions to gain a full understanding
of this device.
Step One - Check the Contents
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 contac t your wholesaler or tekmar sales representative
for assistance.
Type 086 includes • One Indoor Sensor 086 • One Installation and Operation
Manual D 086.
Step Two - Choosing a Location for the Sensor
The sensor should be installed on an interior wall of the desired zone to be
controlled. Avoid installing the sensor in a wall if the adjacent zone is at a much
different temperature. Do not mount the sensor in a location that may be affected
by localized heat sources or cold drafts (in direct sunlight or near a supply air
duct or window).
Step Three - Rough In Wiring
Before drywall is installed run four conductor 18 AWG wire from the tekmar
thermostat to the desired location of the sensor. The maximum wire length between
a thermostat and sensor is 500’ (152.4 m).
Do not run the wires parallel to telephone or power lines. If the sensor wires are
located in an area with strong sources of electromagnetic noise, shielded cable or
twisted pair should be used or the wires can be run in a grounded metal conduit. If
using shielded cable, one end of the shield wire should be connected to the Com
terminal on the thermostat and the other end should remain free. The shield must
not be connected to earth ground.
Staple the wire to a wall stud 5’ (1.5 m) above the floor and coil 1’ (0.3 m) of the
wire to work with before cutting it off.
Write down the exact location of the wire in the wall so it can be found when the
drywall is installed.
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Step Four - Installing the Sensor
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Once the drywall has been installed, locate the sensor wire behind the drywall
using your notes from Step Three.
Near Flush Mount
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A. Using a hole-saw to drill a 1” (25.5 mm) hole at the location
of the sensor wire. Do not drill hole directly over stud.
B. Paint the wall.
C. Remove front disc sticker from the sensor.
D. The front disc of the sensor may be carefully hand painted.
The slotted grill holes must be kept open and free of paint.
Do not use a paint roller. Avoid allowing paint to enter the slotted
holes on the front disc of the sensor as permanent damage to
the sensor may result.
E. Pull the excess wire through the hole.
F. Follow the directions in Step Five - Wiring the Sensor.
G. Once wired, feed the excess wire back into the hole and
hand press the sensor until the back of the disk touches the
wall. The sensor is held in place by the taper of the enclosure
(no fasteners required).
1”
(25.5 mm)
Hole Saw
1”
(25.5 mm)
Photo of actual 086 near flush mount installed
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True Flush Mount
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A. Use a 1-1/2” (38.0 mm) spade bit to drill a recess hole lightly into
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Spade Bit
the drywall to a depth no more than 1/8” (3.0 mm).
B. Use a 1” (25.5 mm) hole-saw and place the guide bit into the center
hole created by the spade bit and drill through the drywall.
C. Sand the surface of the drywall around the hole to remove the
raised paper edge from drilling.
D. Pull the excess wire through the hole.
E. Follow the directions in Step Five - Wiring the Sensor.
F. Use a straight edge (a square or a level) to push the sensor flush
with the surface of the drywall. Press 2 to 3 times in each direction
(90 deg and 0 deg) repeatedly until flush. Do not attempt to press it
in in one motion as the sensor may tilt. The sensor is held in place
by the taper of the enclosure (no fasteners required). Leave the
front disc sticker in place.
G. Use a mud trowel to mud over the entire sensor.
H. Once mud dries, sand the surface of the sensor until the entire
1-1/2”
(38.0 mm)
front disc sticker is completely visible. This ensures the shallowest
circular mark.
I. Remove front disc sticker.
J. Paint the wall including the sensor using a paint roller. The slotted grill holes
must be kept open and free of paint. This can be achieved by using the paint
roller that is mostly wrung out of paint.
1-1/2”
(38.0 mm)
(3.0 mm)
A Watts Water Technologies Company
(25.5 mm)
1/8”
Hole Saw
1”
1”
(25.5 mm)
Photo of actual 086 flush mount installed
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Step Five - Wiring the Sensor
The sensor has four wiring terminals that connect to a humidity sensing
thermostat.
1. Connect the Sen terminal to the thermostat temperature sensor terminal (typically
auxiliary sensor 2).
2. Connect the Com terminal to the thermostat sensor common terminal.
3. Connect the %RH terminal to the thermostat humidity sensor terminal (typically
auxiliary sensor 3).
3. Connect the +V terminal to the thermostat 0-10 Vdc terminal.
Com
%RH
+V
Humidity &
Temp er at ure
Sensor 086
tekmarNet®
Thermostat
557
0-10
S2
Com
S3
Vdc
Sen
Temperature Sensor Testing Instructions
A good quality test meter capable of measuring up to 5,000 k (1 k = 1000)
is required to measure the sensor resistance. In addition to this, the actual
temperature must be measured with either a good quality digital thermometer, or
if a thermometer is not available, a second sensor can be placed alongside the
one to be tested and the readings compared.
First measure the room temperature using the thermometer. Disconnect the Sen and
Com wires from the thermostat. Using an electrical meter, measure the resistance
of the Sen and Com wires at the thermostat location. Using the temperature versus
resistance table, estimate the temperature measured by the sensor. The sensor
measurement and thermometer readings should be close. If the test meter reads
a very high resistance, there may be a broken wire, a poor wiring connection or a
defective sensor. If the resistance is very low, the wiring may be shorted, there may
be moisture in the sensor or the sensor may be defective. To test for a defective
sensor, measure the resistance directly at the sensor location. Once the test has
been completed, reconnect the Sen and Com wires to the thermostat.
Do not apply voltage to the temperature sensor terminals at any time as damage
to the sensor may result.
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Temperature vs. Resistance Table
Temperature Resistance
°F °C
-50 -46 490,813
-45 -43 405,710
-40 -40 336,606
-35 -37 280,279
-30 -34 234,196
-25 -32 196,358
-20 -29 165,180
-15 -26 139,402
-10 -23 118,018
-5 -21 100,221
0 -18 85,362
5-15 72,918
10 -12 62,465
15 -9 53,658
20 -7 46,218
25 -4 39,913
30 -1 34,558
35 2 29,996
40 4 26,099
45 7 22,763
50 10 19,900
55 13 17,436
60 16 15,311
65 18 13,474
70 21 11,883
75 24 10,501
80 27 9,299
85 29 8,250
Temperature Resistance
°F °C
90 32 7,334
95 35 6,532
100 38 5,828
105 41 5,210
110 43 4,665
115 4 6 4 ,18 4
120 49 3,760
125 52 3,383
130 54 3,050
135 57 2,754
140 60 2,490
145 63 2,255
150 66 2,045
155 68 1,857
160 71 1,689
165 74 1,538
170 77 1,403
175 79 1,281
180 82 1,172
185 85 1,073
190 88 983
195 91 903
200 93 829
205 96 763
210 99 703
215 102 648
220 104 598
225 107 553
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Humidity Sensor Testing Instructions
Setup the thermostat to disable the built-in humidity sensor and measure only the
external humidity sensor. The thermostat should be powered for 15 minutes prior
to testing. Record the external relative humidity reading. Use an electrical meter
and set to V (dc). Measure the voltage between the +V and Com wires. It should
measure 3.3 V (dc). If the voltage is different, the thermostat power supply may
be faulty. Next, measure the voltage between the %RH and Com wiring terminals
from the thermostat location. Using the humidity versus voltage table, estimate the
measured relative humidity level in the room. If the displayed relative humidity on
the thermostat and the measured relative humidity are similar the sensor is working
correctly. If the displayed relative humidity on the thermostat is significantly different
than the measured relative humidity, the sensor may require replacement.
Humidity vs. Voltage Table
RH Voltage (%RH to Com) RH Voltage (%RH to Com)
50.59551.61
10 0.69 60 1.72
15 0.79 65 1.82
20 0.90 70 1.92
25 1.00 75 2.03
30 1.10 80 2.13
35 1.20 85 2.23
40 1.31 90 2.33
45 1.41 95 2.44
50 1.51 100 2.54
Technical Data
Humidity & Temperature Sensor 086; Flush Mount
Literature 086_C, 086_D
Packaged weight 0.13 lbs (60 g)
Enclosure White PC-ABS plastic, NEMA 1
Dimensions 1-7/16” O.D. x 1-9/16” D (36 O.D. x 40 mm)
Ambient conditions Indoor use only, 15 to 140°F (-10 to 60°C), non-condensing
Compatible with chlorinated swimming pool environments.
Environmental
Power supply 2.7 to 5.5 V (dc), 0.5 mA maximum, 65 kΩ min impedance
Humidity sensor 0 to 90% ± 3% RH
Temperature sensor NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) β = 3892
A Watts Water Technologies Company
Do not use in presence of ammonia (animal barns), methanol,
ethanol, acetone.
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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 passthrough 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 passthrough 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 responsibilit y 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 WARRANT Y IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IM PLIED, WHICH THE GOVERNI NG
LAW 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 COM PLIANCE WITH OR N ON-VIO LATION OF AN Y APPLICABLE EN VIRO NMENTAL, HEALTH OR SAFET Y
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.
Product design, software and literature are Copyright ©2012 by tekmar Control Systems Ltd.,
A Watts Water Technologies Company. Head Offi ce: 5100 Silver Star Road, Vernon, B.C.
Canada V1B 3K4, 250-545-7749, Fax. 250-545-0650
All specifications are subject
to change without notice
Web Site
: www.tekmarControls.com
8 of 8 086_D - 08/12.
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