Single-zone snow melt control installation and operation manual | 19
Override menu
The Override menu allows an operator to manually test each relay and manually start the
system.
Field
Range
Access Description
Set to
Hydronic
AUTO,
HAND,
MAX,
PRGE, OFF
Electric
AUTO, AND,
TEST, OFF
Default =
AUTO
Installer
MANUAL OVERRIDE
— Manually overrides
the normal automatic operation of the control to
test the equipment or operate the system at the
maximum temperature limits.
AUTO = Normal operation
HAND = Manual override of each relay output
MAX = Operate hydronic system at maximum heat
TEST = Operate electric system for 10 minutes
PRGE = Hydronic system purge operates pumps
to help bleed air from the system
OFF or ON
Default =
OFF
Installer
SYSTEM PUMP RELAY
— Manually turns on the
system pump during the HAND Manual Override.
OFF or ON
Default =
OFF
Installer
HEAT RELAY
— Manually turns on the heat
during the HAND Manual Override.
0 to 100%
Default =
0%
Installer
BOILER PERCENT
— Manually sets the
modulating boiler firing rate during the HAND
Manual Override.
Conditions:
Application Mode is set to Boil.
OFF or ON
Default =
OFF
Installer
ALERT RELAY
— Manually turns on the alert
relay during the HAND Manual Override.
Conditions:
Application Mode is set to PWM or
Boil and Alert Relay is set to ALRT (alert) or the
Application Mode is set to Elec.
0:10 to
72:00 hours
Default =
0:10 hours
Installer
OVERRIDE TIME
— Selects the amount of time
that the HAND Manual Override is in effect before
returning to Automatic operation.
0:10 to
72:00 hours
Default =
24:00 hours
Installer
MAXIMUM PURGE TIME
— Selects the amount
of time that the PURGE Manual Override is in
effect before returning to Automatic operation.
Conditions:
Application Mode is set to PWM
or Boil.
0:10 to
72:00 hours
Default =
24:00 hours
Installer
MAXIMUM HEAT TIME
— Selects the amount
of time that the MAX HEAT Manual Override is in
effect before returning to Automatic operation.
Conditions:
Application Mode is set to PWM
or Boil.
