HBX SNO-0111 User manual

HBX Control Systems Inc.
Installation Manual
Socket and Cover Plate 0111
Snowmelt Sensor 0110

HBX Snowmelt Sensor
HBX Snowmelt Sensor
Page 2
TABLE OF CONTENTS
Introduction ............................................................................................ 3
Description ...............................................................................................3
Safety Symbols & Warnings ................................................................... 3
Receipt & Inspection .............................................................................. 3
Technical Data ........................................................................................4
Dimensions ...............................................................................................4
Installation and Wiring .............................................................................5-8
Installation ..................................................................................................5
Wiring .........................................................................................................7
Testing and Troubleshooting Procedure..................................................9-10
SNO-0110 - Testing .....................................................................................9
SNO-0110 - Troubleshooting .....................................................................9-10
Warranty Information ................................................................................11
Index

HBX Snowmelt Sensor
HBX Snowmelt Sensor
© HBX Control Systems Inc. 2014 Page 3
RECEIPT & INSPECTION
The SNO-0110/SNO-0111 has gone through rigorous
quality control tests at the factory before shipment.
After receipt and before installation perform the
following checks:
Receipt
After receiving, inspect the unit for any possible
physical damage that may have occurred during
transportation.
Inspection
After unpacking the unit make sure the boxes
contain:
SNO-0110 Package:
• Optical snowmelt sensor
• 30 meters of 22AWG 2 pair shielded cable
• 4 x Stainless steel 4 x 25mm machine screws
• 3 meters Universal Sensor
SNO-0111 Package:
• Sensor socket
• Cover plate (dud sensor)
• 4 x Stainless steel 4 x 25mm machine screws
• Remote Slab Sensor
DESCRIPTION
Together the SNO-0110 (sensor & cable) and the
SNO-0111 (socket and cover plate) make up the
sensor portions of the HBX Snowmelt System. The
SNO-0110 snow/ice sensor is an optical design that
is capable of sensing snow conditions. This allows
the user to set a preferred starting condition for
the snowmelt system. The SNO-0110 is design to
be mounted in the slab however because of the
optical design it can also be remotely installed.
The SNO-0111 socket and cover plate allows for the
concrete, asphalt, etc. to be poured prior to the
installation of the Snowmelt Control, and the SNO-
0110 snow/ice sensor.
Only suitably qualied individuals with
formal training in electrical and HVAC
controls should attempt the installation
of this equipment. Incorrect wiring
and installation will affect the warranty
provided with this unit. Wiring must be
completed in accordance with the
codes and practices applicable to the
jurisdiction for the actual installation.
SAFETY SYMBOLS & WARNING
Point of Interest
This point claries pertinent information,
or brings your attention to an action
that may have adverse effects on the
installation process.
Moderate Hazard
This action may cause personal injury or
have adverse effects on the installation
process if handled incorrectly.
Drawing Reference
Refer to the specied electrical or
mechanical drawing at the back of the
manual.
INTRODUCTION
This manual will help with the installation, parameter setting, troubleshooting and general maintenance
requirements for the snowmelt sensor, socket and cover plate. To guarantee the safe and reliable operation
ofyoursnowmeltsystem,youmustrstreadthismanualindetailandtakeparticularnotetoanyandall
warnings.
HBX SNO-0111/ SNO-0100 SNOWMELT SENSOR/ SOCKET AND COVER PLATE

HBX Snowmelt Sensor
HBX Snowmelt Sensor
Page 4
Nameplate Information:
The exterior label contains specic information
uniquetoyourHBXSnowmeltSensorandidenties
some of the basic features. The label displays the
serial number which will match the serial number
on the SNO-XXXX Control, the lot number, the bar
code and the product’s ETL number.
TECHNICAL DATA AND DIMENSIONS
TECHNICAL DATA
Materials:
Polycarbonate and brass
Weight:
0.45 KG (1.00 lb)
Socket Dimensions:
140mm W x 103mm H x 140mm D
Sensor Dimensions:
100mm W x 38mm H x 100mm D
ETL Listings:
Meets CSA C22.2 No. 24
Meets UL Standard 873
ETL Control No. 3068143
DIMENSIONS
82 mm
(3.23 in)
140 mm
(5.51 in)
140 mm
(5.51 in)
140 mm
(5.51 in)
103 mm
(4.06 in)
100 mm
(3.94 in)
Side ViewTop View
SNO-0110
SnowMelt Sensor
and Cable
SNO-0110
SnowMelt Sensor and Cable
Made In
Canada
3068143
Lot#000000000
Serial #:00000000
Date: 00-00-0000
V1.02
100 mm
(3.94 in)
38 mm
(1.50 in)

HBX Snowmelt Sensor
HBX Snowmelt Sensor
© HBX Control Systems Inc. 2014 Page 5
INSTALLATION AND WIRING
INSTALLATION:
1. Slab Sensor Location
Installing the sensor at the correct location in the slab is
critical for a properly functioning snow/ice melting system.
The sensor should be located where snowfall is normal and
not affected by surrounding buildings. Also, the sensor must
not be installed where standing water could accumulate
on its surface.
The sensor location should also be halfway between the
twoheatingpipesthatareinstalledintheslab(seegure
1). There is a thermistor built into the sensor that senses the
slab temperature at all times. Keeping the sensor away
from pipes in the slab ensures the accurate operation of
your snow/ice melting system.
a) Mounting the Socket and cover plate
When mounting the socket and cover plate in the snowmelt
slab use rebar mounted in the soil below to level the socket
and cover plate so that the cover plate is level with the
nishedgradeofthesnowmeltingsurface(seegure2).
When the socket and cover plate are level use a screw to
tightenthesocketontotherebar.(seegure3)
Failure to mount the socket properly may result in
incorrect or faulty sensor readings.
i) Ramp Mounting
The socket and cover plate can also be mounted on a
ramp. Make sure to locate the socket and cover plate near
the bottom of the ramp. This will allow for proper ice melting
whenthemeltedsnowowsdown(seegure4).
ii) Brass Plugs
On the socket there are 4 brass plugs. These plugs are
designed to make contact with the brass ring on the sensor
so the sensor can get proper slab temperatures. Take care
not to press these plugs in or out as they are properly set
at the factory. Manipulation of the plugs may result in the
sensornotttingproperlyinthesocket(seegure5).
Take special care to clean the brass surfaces on the inside
of the socket. Making sure to clean any concrete that may
have accumulated on them. Failure to do so may result in
the sensor not making proper contact and not reading the
slab temperature properly.
Figure 1 - Snowment sensor location
Figure 2 - Leveling the socket and cover plate
Figure 3 - Tightening the socket onto the rebar
Top of Slab
Heating Pipe
Rebar
Underslab
Insulation Compact
Base

HBX Snowmelt Sensor
HBX Snowmelt Sensor
Page 6
82 mm
(3.23 in)
140 mm
(5.51 in)
140 mm
(5.51 in)
140 mm
(5.51 in)
103 mm
(4.06 in)
100 mm
(3.94 in)
Side ViewTop View
b) Placing Concrete
A plastic cover is provided with the socket to prevent it from
beingaccidentallylledwithconcrete.Theplasticcoveristhe
samethicknessasthesensorange.
This allows the nished surface of the concrete to be toweled
ushwiththecover.Thecovermustbeinstalledpriortoplacing
the concrete. Also insure that the mounting plate drainage hole
remains unplugged once the concrete has cured. (See Figure 7)
Install the socket directly on top of gravel in order to
provide good drainage. If that is not possible, please
ensure that you drill a hole through the bottom of the
socket for proper drainage of water for the optical snow
sensor to function. (See Figure 6) If this is not done, it will
void the warranty of the snow sensor.
Never use the wire conduit as drainage. This can damage
the sensor wire resulting in damage to the control and/or
sensor.
c) Installing the Sensor
Once the snow melting surface is nished you can install the
snow/ice sensor. Clean any excess debris from inside the socket.
Fish the snow/ice sensor wire through the pre-installed pipe.
Makesuretoleavealittlebitofslackinthewire(seegure7).
Once the snow/ice sensor is properly inserted into the socket put
the four screws back in place to secure it.
Take special care to align the screw holes from the snow/
ice sensor to those on the socket. Once the sensor is
pressed into place prying up the sensor to line up the
holes will result in damage to the sensor and, potentially,
the socket.
2. Remote Sensor Location
The optical nature of the snow/ice sensor allows for mounting
somewhere other than the slab (i.e. a roof or fence post). This is
possible, but take special care that it is not mounted in an area
where the surroundings cause an abnormal amount of snow fall.
Paving stones or equivalent should be installed with a
remote sensor.
When remote mounting the sensor an external slab sensor
must be used in order for the control to be able to read
the slab temperature. The temperature sensor on the
snow/ice sensor will no longer be used.
Brass
Plug
Figure 4 - Ramp Mounting
DRILL
HERE
Figure 6 - Drilling the socket
82 mm
140 mm
100 mm
Side View
Figure 5 - Brass Plug

HBX Snowmelt Sensor
HBX Snowmelt Sensor
© HBX Control Systems Inc. 2014 Page 7
You must select the control setting for remote slab to yes (i.e. ‘Y’). This will let the control know that you have
remotely mounted the snow/ice sensor. See the proper snow control manual for more information. See
drawing 2 (Page 8) for the correct wiring of a remote slab sensor.
WIRING:
Proper sensor installation is key to a properly performing snowmelt system. All applicable electrical
codes should be followed.
Take special care that the sensor wire is not run with any high voltage wiring as this may result in faulty
readings. The sensor is supplied with 30 meters of 22 awg shielded cable. If the sensor is more than 30 meters
from the control extend the wire from the end of the sensor wire. When extending the cable (to a maximum
of 60 meters) use 18AWG shielded cable. If possible, use 2 pair shielded 18AWG for best results. You must also
extend the shield wire and attach it to the same point as the black wire on the SNO-0100 or SNO-0550. If this
is not done, the temperature sensor in the SNO-0110 will not work properly.
3. Maintenance
In order to ensure the long term accuracy of your snow/ice melting system you should clear away any mud,
rocks, or other debris that might obstruct the sensors optics.
In the unlikely event that the sensor becomes inoperable carefully remove it from the socket and follow the
installation procedure to install a new sensor.
Figure 7 - Snowmelt sensor installation
SNO-0550
CentralProcessing Unit
Relays:
240VAC 5A Max
Input:
120VAC 15A Max
ENTER

HBX Snowmelt Sensor
HBX Snowmelt Sensor
Page 8
SNO-0110 - DRAWING 001
SLAB SNOW/ICE SENSOR WIRING WITH A
SNO-1000/0100
SNO-0110 - DRAWING 003
SLAB SNOW/ICE SENSOR WIRING WITH A
SNO-0550
SNO-0110 - DRAWING 002
REMOTE INSTALL - SNOW/ICE SENSOR WITH
A SNO-1000/0100
SNO-0110 - DRAWING 004
REMOTE INSTALL - SNOW/ICE SENSOR WITH
A SNO-0550
These are not engineered drawings and do not necessarily include all the components for an entire
system. They are intended as representations of how the Sensor may be wired into a control for a
sample application. It is the responsibility of the installer to seek professional advice and/or install the
system to meet all necessary codes for the jurisdiction of the actual installation.
Optical Sensor
GREEN
RED
WHITE
BLACK
SHIELD
EXPANSION MODULE
DS
1
6
DS
2
75
C
DO NOT
CONNECT
POWER
HERE
GR
120
12
N
L
1110
1C
TM
32
2
TM TM
1 3 4 BL
1
BL
98
2
4-20mA
1-10v
+ -
2
15
C
1
1413
SNO-0100
HBX
Optical Sensor
Slab
Sensor
GREEN
RED
BLACK
EXPANSION MODULE
DS
1
6
DS
2
75
C
DO NOT
CONNECT
POWER
HERE
GR
120
12
N
L
1110
1C
TM
32
2
TM TM
1 3 4 BL
1
BL
98
2
4-20mA
1-10v
+ -
2
15
C
1
1413
SNO-0100
HBX
Optical Sensor
GREEN
RED
WHITE
BLACK
SHIELD
EXPANSION MODULE
DS
1
6
DS
2
75
C
DO NOT
CONNECT
POWER
HERE
GR
120
12
N
L
1110
1C
TM
32
2
TM TM
1 3 4 BL
1
BL
98
2
4-20mA
1-10v
+ -
2
15
C
1
1413
SNO-0100
HBX
Optical Sensor
Slab
Sensor
GREEN
RED
BLACK
EXPANSION MODULE
DS
1
6
DS
2
75
C
DO NOT
CONNECT
POWER
HERE
GR
120
12
N
L
1110
1C
TM
32
2
TM TM
1 3 4 BL
1
BL
98
2
4-20mA
1-10v
+ -
2
15
C
1
1413
SNO-0100
HBX
Optical Sensor
Slab
Sensor
5 A
RL
1
RL
1817
1
5 A
RL
2
RL
2019
2
Central Processing Unit
SNO-0550
HBX
GR
120
16
N
L
1514
TM
32
11
TM TM
10 12 13
BL
1
BL
9
8
1
15
SG
2
2
PW TM
1 3 4
24 VAC MAX
5 A
RL
2
RL
2221
2
FD
1
FD
76
1
5
S
4
3C
1
2 A
GREEN
RED
BLACK
Optical Sensor
5 A
RL
1
RL
1817
1
5 A
RL
2
RL
2019
2
Central Processing Unit
SNO-0550
HBX
GR
120
16
N
L
1514
TM
32
11
TM TM
10 12 13
BL
1
BL
9
8
1
15
SG
2
2
PW TM
1 3 4
24 VAC MAX
5 A
RL
2
RL
2221
2
FD
1
FD
76
1
5
S
4
3C
1
2 A
GREEN
RED
WHITE
BLACK
SHIELD
Optical Sensor
Slab
Sensor
5 A
RL
1
RL
1817
1
5 A
RL
2
RL
2019
2
Central Processing Unit
SNO-0550
HBX
GR
120
16
N
L
1514
TM
32
11
TM TM
10 12 13
BL
1
BL
9
8
1
15
SG
2
2
PW TM
1 3 4
24 VAC MAX
5 A
RL
2
RL
2221
2
FD
1
FD
76
1
5
S
4
3C
1
2 A
GREEN
RED
BLACK
Optical Sensor
5 A
RL
1
RL
1817
1
5 A
RL
2
RL
2019
2
Central Processing Unit
SNO-0550
HBX
GR
120
16
N
L
1514
TM
32
11
TM TM
10 12 13
BL
1
BL
9
8
1
15
SG
2
2
PW TM
1 3 4
24 VAC MAX
5 A
RL
2
RL
2221
2
FD
1
FD
76
1
5
S
4
3C
1
2 A
GREEN
RED
WHITE
BLACK
SHIELD
Connect the shield wire at
the SNO-0100
Do not use shield wire
or white wire for this
installation
Do not use shield wire
or white wire for this
installation
External slab sensor
installed in snow-melting
slab
External slab sensor
installed in snow-melting
slab (029-0045 10K Sensor

HBX Snowmelt Sensor
HBX Snowmelt Sensor
© HBX Control Systems Inc. 2014 Page 9
SNO-0110 - DRAWING 003
SLAB SNOW/ICE SENSOR WIRING WITH A
SNO-0500
SNO-0110 - DRAWING 004
REMOTE INSTALL - SNOW/ICE SENSOR WITH
A SNO-0500
45
TESTING AND TROUBLESHOOTING PROCEDURE
Temperature
Resistance
Temperature
Resistance
Temperature
Resistance
ºF
ºC
Ω
ºF
ºC
Ω
ºF
ºC
Ω
- 22
- 30
177,000
- 0.4
- 18
86,463
21.2
- 6
44,617
- 18.4
- 28
156,404
3.2
- 16
77,162
24.8
- 4
40,153
- 14.8
- 26
138,482
6.8
- 14
68,957
28.4
- 2
36,182
- 11.2
- 24
122,807
10.4
- 12
61,711
32
0
32,654
- 7.6
- 22
109,075
14
- 10
55,319
35.6
2
29,498
- 4
- 20
97,060
17.6
- 8
49,640
39.2
4
26,686
SNO-0110 - TESTING
1. Thermistor Test
Resistance table for thermistors (outdoor, system)
2. Snowmelt Sensor Test
I. Heater Element Resistance Test
With the sensor unplugged, measure the resistance between the Red wire and the black wire. The result
should be around 23-26 Ohms with all 30 meters of wire attached.
The Following is applicable to the SNO-0500 and SNO-1000. Refer to SNO-0550 manual for testing Instructions.
II. Slab Sensor Test
Using the above table measure the resistance of the white and shield wires with the sensor unplugged. This
will give you the slab sensor reading when the heater is not ON. Take note if the heater was ON and the
snowmeltsensoriswarm,thiswillreectintheslabsensorreading.
III. Heater Element Voltage Test
With the sensor plugged into the control (make sure heater is ON) check the voltage from Red to Black.
The voltage should be around 15-17 VDC (versions 1.XX) or 12-15 VDC (versions 2.XX).
IV. Intensity Test
With the sensor plugged into the control (make sure heater is ON) check the voltage between Green and
Black. The reading should be around 0.5-1.0 VDC without snow on the optical sensor and 2.0-3.0 VDC with
100% snow.

HBX Snowmelt Sensor
HBX Snowmelt Sensor
Page 10
SNO-0110 - TROUBLESHOOTING
Snowmelt Sensor
1. Problem: The slab temperature displayed on the control is very high or shows a sensor error.
Status Screen: Slab Temperature: 185 ºF or sensor error.
Explanation: The control is no longer able to read the slab sensor due to an open circuit. In this case the control
assumes a slab temperature of t and continues operation, but will not turn On the boiler contacts or injection
pump or system pump.
Solution: Verify that the system sensor connection is as described in the Installation Manual of the SNO-0111/SNO-
0110.
2. Problem: The snow melt sensor surface temperature is too high and is possibly affecting the slab temperature.
Explanation: Inside the snow melt sensor is a heater and the function is to melt the snow on top of the sensor to
measure the percentage of snowfall rate based on the snow landing on the sensor. The temperature emitted by
the heater has already been taken into account when calculating the slab temperature. The heater will put 40 ºF
into the slab temperature when the heater is ON.
3. Problem: The slab temperature displayed on the screen differs from the actual temperature of the slab and will
not activate the SNO-0550 when its necessary.
Explanation:
•Inthiscasethebrassplugsonthesocketarepossiblynotmakingpropercontactwiththeconcreteandnot
reading the slab temperature properly due a improper wicking of the heater to the concrete.
•Italsocouldbethatthesensorisnotinstalledinconcretebutinstalledinapavementstonedrivewayresulting
in overheating the sensor.
•Italsocouldbethatthesensorheaterisputtingouttoomanywattsanditisraisingthetemperatureofthesensor
more than the 40 ºF degrees designed.
Solution
•YoucanadjusttheSnowIdleTemperatureandtheMeltTemperatureaccordingtothedeviationbetweenthe
temperature showed by the SNO-0500 and the slab.
 •Analternativesolutioncanbetoinstallaremotesensor.Todothis,youshouldsetitintheprogramming
options so the control knows it’s using a remote slab sensor and will no longer look at the slab sensor built into the
optical sensor but the new one in the slab. Set the SLAB SENSOR LOCATION to REM from INT. Also take note of the
drawing below to determine the proper installation of the remote sensor to the control.