9
AT C 3 2 U 0 1 A C o m m u n i c a t i n g , P r o g r a m m a b l e T h e r m o s t a t - I O M
C r e a t e d : 1 O c t . , 2 0 1 2
MODULATING VALVE
CONFIGURATION
OFF POSITION 3.8
PREVIOUS SELECT
Two
connections
on DXM2
board to allow
for multi-unit
installation
Or
3.5.1
MODULATING VALVE OFF POSITION
Click Next from section 3.5 to select the off position
value for the modulating valve.
NOTE:
For certain commercial multi-unit
applications, the modulating valve can be kept
slightly open by choosing values 3.3-4.0.
3.6 MULTI-UNIT
CONFIGURATION
If multiple units are connected to one ATC thermostat upon
unit start-up, the thermostat will automatically register the
serial numbers of all units connected to it.
NOTE:
Multiple units may be connected directly to the ATC
thermostat or connected to one another in series, as shown by
the fi gure below.
MODULATING VALVE
CONFIGURATION
DEG
HEATING DELTA T 8
COOLING DELTA T 15
PREVIOUS NEXT
3.5 VALVE
CONFIGURATION
Confi gure temperature differentials at the thermostat for
Integrated Variable Speed Water Flow Control units with a
motorized modulating valve.
Adjust the Valve Confi guration settings using the up/down
arrow buttons. Press the center button to select each item.
• Heating Delta T (default stored in control) –
valid range: 4 to 12ºF (in 1ºF increments)
• Cooling Delta T (default stored in control) –
valid range: 9 to 20ºF (in 1ºF increments)
NOTE 1:
Minimum and Maximum degree values are shown
only when the control is confi gured with the appropriate values.
NOTE 2:
Refer to section 3.6.3 for multi-unit confi guration
instructions.
VARIABLE SPD INTERNAL
PUMP CONFIGURATION
PUMP CONTROL FIXED
HEATING STAGE 1 60%
COOLING STAGE 2 75%
COOLING STAGE 1 50%
COOLING STAGE 2 70%
PREVIOUS SELECT
