HBX SNO-0500 User manual

HBX Control Systems Inc.
Installation Manual
SNO-0500
Version 1.04
SNO-0500


HBX SNO-0500 HVAC Control
Version 1.04
Control Systems Inc.
Comfort
Control
Innovation
HBX SNO-0500 HVAC Control
Version 1.04
Table of Contents
Control Systems Inc.
Comfor
t
Contro
l
Innovation
HBX SNO-0500 HVAC Control
Version 1.04
TABLE OF CONTENTS
Introduction ............................................................................................ 3
Safety Symbols & Warnings ................................................................... 3
Receipt & Inspection .............................................................................. 3
Description ...............................................................................................4
Technical data ........................................................................................ 5
Dimensions ............................................................................................... 5
Wiring and Installation .............................................................................6
Wiring .........................................................................................................6
Installation ................................................................................................ 6
Programming HBX SNO-0500 ................................................................7-18
Multicolour Backlit Display ......................................................................7
Dial Operation & Set/Status Mode ........................................................7
Programming Scroll Mode ..................................................................... 8
Programming Change Mode ................................................................8
Status Screens ..........................................................................................8
Snowmelt Programming...........................................................................9-11
Sample Wiring and Mechanical Diagrams ..........................................12-13


Testing and troubleshooting procedure..................................................16-18
SNO-0500/ SNO-0110 - Testing .................................................................16
SNO-0500/ SNO-0110 - Troubleshooting .................................................16-18
Warranty Information ...............................................................................19

HBX SNO-0500 HVAC Control
Version 1.04
© HBX Control Systems Inc. 2012 Page 3
tl
HBX SNO-0500 SNOWMELT CONTROLLER
INTRODUCTION
This manual will help with the installation, parameter setting,
troubleshooting and general maintenance requirements for the
controller. To guarantee the safe and reliable operation of this control,

and all warnings or caution directives prior to connecting to AC power.
        
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.
The HBX SNO-0500 is a standalone snow melt control. Please consult
and install the heating appliance in accordance with manufacture’s
recommendations.
SAFETY SYMBOLS & WARNINGS
Extreme Hazard
This action poses a serious threat that could
result in personal injury or death, as well as
permanent damage to the equipment.
Proceed with caution.
Moderate Hazard
This action may cause personal injury or have
adverse effects on the installation process if
handled incorrectly.

The presence of low voltage(24VAC) or high
voltage(120VAC) could result in personal injury
or permanent damage to components or
equipment.
Point of Interest
     
brings your attention to an action that may
have adverse effects on the installation
process.


drawing at the back of the manual.
     
training in electrical and HVAC controls should
attempt the installation of this equipment.
      

      
practices applicable to the jurisdiction for the
actual installation.
The HBX SNO-0500 is a microprocessor based
controller and as such is not to be regarded as a
safety (limit) control. Please consult and install
the heating or cooling appliance in accordance

RECEIPT & INSPECTION
After receiving, inspect the unit for any possible
physical damage that may have occurred during
transportation.
After unpacking the unit make sure the box contains:
1 x Remote Outdoor sensor
1 x Universal sensors
1 x Terminal Screwdriver (2.5mm)
1 x Cable ties

HBX SNO-0500 HVAC Control
Version 1.04
Page 4
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HBX SNO-0500 HVAC CONTROLLER
DESCRIPTION
The SN0-0500 is a stand alone snowmelt control, and utilizes a unique sensor technology unmatched by any
other snowmelt control system on the market today. This control utilizes sensor technology to detect falling
snow. The snowmelt sensor uses a heater to melt the snow that lands on the sensor. Base on this the control
measures the percentage of snow fall rate between 0% and 100%.
The SN0-0500 consists of numerous exceptional features including settings for your snow fall intensity as well

applications and snow melt provisions over and above conventional slab sensing. With the ability to control

stand alone control is suitable for single scale projects, or multizone projects that require individual optical
sensors for each melt zone.
Some features of the HBX SNO-0500 are:
 
- Max. snow fall level settings
- Continuous snow fall settings
 
 
 
 
 
Snow Fall Rate

HBX SNO-0500 HVAC Control
Version 1.04
© HBX Control Systems Inc. 2012 Page 5
TECHNICAL DATA & DIMENSIONS
 
Built in 2 Amp fast acting fuse
2 x Thermistor Input
(10K Ohm)
1 x Miscellaneous Input Signal
2 x Relay Outputs
Dry Contacts
(240VAC 10Amps)
1 x 2 Amp Dry Contact
1 x Snowmelt Sensor Input

0.408Kg

100mm W x 168mm H x 70mm D
 
Meets CSA C22.2 No. 24
Meets UL Standard 873
ETL Control No. 3068143

50°F to 104°F (10ºC to 40ºC)
SNO-0500
SNOW
SENSOR
7 8 9 10
DEMAND
THERM(S)
1 2 3 4
BOILER
5 6
POWER
14 15 16
1/2
RELAY
11 12 13
Boiler
Enable/
TT
Outdoor
Sensor
120
VAC
System &
Injection
Pump
Floating
Valve
System
Sensor
Demand
Input
F
loat
i
n
g
SNO Sensor
70mm 66mm17
Side View Front View Rear View Top View
168mm
100mm
63.2mm
86mm
Bottom View
DIMENSIONS

HBX SNO-0500 HVAC Control
Version 1.04
Page 6

Apply snowmelt demand from a dry contact. For
force melt demand use a momentary switch.

Boiler enable contact.
Sensor Inputs
 System sensor, installed on low temperature
system.
 Outdoor sensor.
 Snowmelt Optical Sensor: connection order:
Green – contact 7, Red – contact 8. White – contact
9, Black – contact 10, Shield – contact 10

Injection pump, can also be used with relay 2 to


System pump, can also be used with relay 1 to control

(Relays 1 & 2 are dry contacts and rated for a
maximum of 10 Amps.)

When the desired sensor location is more than
100 feet from the end of the sensor you need to
extend the cable using 18AWG shielded cable.




Jumper
This jumper is used to add or remove arc suppression from the relay 2
contacts.
If you are using the SNO-0500 in PMIp injection mode the jumper
           
on
SNO-0500 Rear View
Jumper
INSTALLATION
The SNO-0500 is designed to be wall mounted, DIN rail mounted or
installed in a separate electrical enclosure. The unit should be mounted
inside and protected from falling water and high humidity conditions.
With all the covers in place it is designed to protect any individual from
accidental electrical shock.
WIRING AND INSTALLATION
WIRING
All signal wiring must be with a
minimum of 18AWG wire at a
maximum of 500ft.

HBX SNO-0500 HVAC Control
Version 1.04
© HBX Control Systems Inc. 2012 Page 7
MULTICOLOUR BACKLIT DISPLAY
The Multicolour Backlit Display is one of the key features of the HBX Controls stand-alone SNO-0500 Control.
Depending on which mode of operation is selected the screen colour will change to indicate information
about the status of the system.
Screen Colours
Light Blue - No Demand
Red - Melt Mode
Dark Blue - Idle Mode
1 2 3 4
°F
110.0
Status
Set
:
1:
2:
3:
4:
M
Set
DIAL OPERATION & SET/STATUS MODE
There are 2 modes for the control, programming and status screens. The programming
by the SET icon on in the top/middle left corner. The status screen is indicated by the STATUS icon in the top/
middle left corner.
Pressing the dial in for more than one second will allow the user to access the programming section of the
control.

Page 8
PROGRAMMING SCROLL MODE
To enter this mode the dial must be pressed in for more than one second. When the SET indicator comes on
release the button, you will now be in Programming Scroll Mode.
In this mode turning the dial to the left or right will scroll through the programming options on the control. Each
setting will be indicated by the icons around the screen as well as the temperature/number of that setting.
If you allow the control to idle in Programming Scroll Mode for thirty seconds the control will automatically return
to STATUS mode.
PROGRAMMING CHANGE MODE
To change a setting you must press the dial in momentarily and an arrow will appear in the top left corner of
the screen. This will indicate the control is in the Programming Change Mode. While in the change mode the
user will be able to change the setting of that selection by turning the dial to the left or right. Once you have

will indicate that the user is no longer in Programming Change Mode.
CC
C
II
nn
pp
ut: 120VAC 60Hz 10ut: 120VAC 60Hz 10
AA
OOutput: 4-20mA/1-10Vutput: 4-20mA/1-10V
1 10V
Set
CC
C
IInn
pp
ut: 120VAC 60Hz 10ut: 120VAC 60Hz 10
AA
OOutput: 4-20mA/1-10Vutput: 4-20mA/1-10V
1 10V
Set
STATUS SCREENS

Target Temperature

Temperature
°F
System
Temp
96.0
Status
°F
Setpoint
System
Temp
90.0
Status
Outdoor Air Temperature
Slab Setpoint
3
°F
Out Temp
90.0
Status
%
15.0
Status

Slab
°F
Temp
18.0
Status
Slab Temperature
Slab
°F
Setpoint
18.0
Status

Page 9
Instant Intensity
If the snow melt sensor sees a greater snowfall rate than this set percentage, the
control will come out of idle mode and go into melt mode.
(1% to 100%) Default: 25%
%
25.0
Set
SNOWMELT CONTROL PROGRAMMING
Constant Intensity
If the snowfall rate is greater than this set percentage, for longer than the constant
time set below, the control will come out of idle mode and go into melt mode.
(1% to 100%) Default: 10%
%
10.0
Set
Demand Input Type
DEM 0: Demand forces melt mode (always in idle mode).
DEM 1: Demand starts control in Idle mode.
DEM 2: Same as DEM 0, but boiler output only closes when control goes into melt
mode.
 
Default: DEM 0
Constant Time
Set this time in conjunction with constant intensity.
(1h to 10hrs) Default: 3 Hours
Time
3.0
Set
Set

Set this to the minimum slab temperature when there is no snow present.
(-40°F to 70°F) Default: 25°F
Slab
Min
Temp
25.0
Set
Demand input is on pin 1
and 3. This is a dry contact.

Page 10
System Delta T

system target. The target is calculated by using system supply and system return
temperatures:

(2°F to 80°F) Default: 25°F

This setting allows for the system to stay on even after no snow is present. This will
melt any residual snow that has accumulated and not melted.
(1h to 20hrs) Default: 4 hours
This time is also used when a force melt demand is given. Once a force melt
demand is given the control will stay in melt mode for this amount of time.
Slab
Time
Max
4.0
Set
Diff
°F
System
25.0
Set
Min System Temperature
Min System Temp is the lowest water temp in your system loop.
(40°F to 200°F) Default: 75°F
Min
°F
System
Temp
75.0
Set

This setting is used to set the snow zone slab temperature when snow is present.
Going from idle to melt temperature is determined by the snow sensor. If the
amount of snow is more than the intensity settings then the control will go into melt
mode.
(1°F to 70°F) Default: 50°F
Slab
Max
°F
Temp
50.0
Set

This is the temperature at which you decide that the control will go into WWSD. Set
this to the temperature at which the slab is able to melt itself.
(2°F to 100°F) Default: 40°F
Max
°F
Out Temp
40.0
Set

If the outdoor temperature is below this setting the control goes into C.W.S.D.
This prevents the control from running in extremely cold weather when the snow is
not likely to melt properly.
(-50°F to 20°F) Default: -30°F
Min
Out Temp
30.0
Set