Microprocessor Controller for MUA
19
®
m
anual
o
Verride
m
ode
The Manual Overrides menu is for start-up, commissioning, and troubleshooting. This
menu allows the user to override the control loops and specific inputs and outputs.
To access the Manual Overrides submenus, enter the
service password (1000)
.
Manual overrides must be enabled at this screen to allow the user to override control
loops. Override options must be changed from Auto to Manual for manual control.
o
Verride
u
niT
o
n
o
FF
When manual override is set to enable, use the arrow buttons to turn the unit on
or off.
o
Verride
s
upply
F
an
s
peed
The speed is the proportional percentage of the analog output from the controller
to the VFD.
0% Speed = Min speed (determined by VFD)
100% Speed = Max speed (determined by VFD)
(Reference unit Installation and Operation Manual for VFD programming).
Control Variables
Advanced
Manual Overrides
The Manual Overrides menus are for start-up, commissioning, and
troubleshooting.
Menu
o
Verride
o
uTside
d
amper
p
osiTion
This screen only appears if the unit is equipped with a modulating OA. The
recirculation damper position, if equipped, will be the inverse of the OA damper
position shown.
0% = Outside air damper closed
100% = Outside air damper fully open
o
Verride
o
ccupancy
c
onTrol
When manual override is set to enable, use the arrow buttons to change
occupancy control.
The
Advanced
menu allows the user to access several submenus regarding
controller information, controller overrides, network settings, I/O configuration,
and unit configuration. Submenu options are read only and will require the user
to input proper login criteria. The
service password (1000)
is required to change
service access menus. Consult factory for factory level access.
Control Variables
Advanced
o
Verride
Informs the user that the unit is overridden to occupied from an external source.
When
DI Ovr Act
, is displayed, the digital input for occupancy is being used as an
override and is active. When
TOV Active
is displayed, the timed override feature
has been activated at the space thermostat.
o
Verride
e
xhausT
F
an
When manual overrides are enabled, use the arrow buttons to change the
override and command to enable the exhaust output.
