H B X S N O - 0 5 5 0 S n o w M e l t C o n t r o l
V e r s i o n 2 . 1 4 . 1
Page 6
CONTROL SETUP
Multicolour backlit Display
The Multicolour Backlit Display is one of the key features
of the HBX Controls stand-alone SNO-0550 Control.
Depending on which mode of operation is selected the
screen colour will change to indicate information about
the status of the system.
Screen Colors
Light Blue (White) - No Demand/
OFF
Green - Standby Mode
Dark Blue - Idle Mode
Red - Melt Mode
Flashing Orange - Optical Sensor Fault
STATUS & MODE DESCRIPTIONS
ON
: Control is awaiting signal from optical sensor or Forced Melt Demand from user.
OFF
: Control is in
WWSD/CWSD
or no demand is present (Pins 6-7) when in
DEMAND
mode
STANDBY/IDLE
(See
Page 11)
MELT
: Control is
ON
and snow was detected by the sensor higher then the intensity setting.
IDLE
: Control is
ON
and maintaining the slab at the idle temperature until snow is detected by optical sensor or
forced melt demand is given by user.
STANDBY
: Control is
ON
but not maintaining a slab temperature. Control will remain
ON
until snow is detected
by optical sensor or forced melt demand is given by user.
ANTICIPATE
: Control will be
ON
in
STANDBY
or
IDLE
for the amount of time determined by the user in
ANTICIPATE
DAYS.
ANTICIPATE DAYS
: If snow is detected during this time control will go in to melt mode. Otherwise the control will
be
OFF
after
ANTICIPATE DAYS
has elapsed.
FORCE MELT
: When control is
ON
and awaiting snow detection by optical sensor, if demand is given (PINS 6-7)
control will go into melt mode. Pressing
UP
and
DOWN
arrow buttons simultaneously for approximatelty 10
seconds will also override sensor and force melt mode.
SNO-0550
Central Processing Unit
Relays:
240VAC 5A Max
Input:
120VAC 15A Max
ENTER
SNO
ON/OFF
Boiler
Demand
Signal
Sensor (2)
Outdoor
Sensor
Optical
Sensor
120
VAC
Relay
Outputs (3)
STATUS
SLAB
INT
SYSTEM
RETURN
OUTDOOR
BLR
ON
MLT
TARGET
SNOW
NONE
SYS P
ON
FL UP
OFF
FL DN
ON
34
°F
95
°F
75
°F
10
°F
50
°F
120
°F
SNO-0110