Tranquility
®
Digital (DXM2)—Troubleshooting Guide
Rev.: 10 March, 2015
64
Geothermal Heating and Cooling
ATC32U02 Thermostat Screens and Set Up
3.3 UNIT CONFIGURATION
Adjust the Unit Conguration settings including Heat
Pump Family, Heat Pump Size, Blower Type, and Loop
Conguration using the up/down arrow buttons. Press the
center button to select each item.
• Heat Pump Family (default stored in control) –
valid range: TE, TY, TES, TEP, TRT, TSM
• Heat Pump Size (default stored in control) –
valid range: depends on Heat Pump Family setting
• Blower Type (default stored in control) – valid
range: NONE, PSC–2SPD, ECM, PSC–1SPD
• Loop Cong (default stored in control) – valid
range: Other, VS PUMP, MOD VALVE
Airow, pump and valves can be congured from ‘System
Conguration’ screen.
Select ‘VS PUMP’ when applying an internal variable speed
ow controller with other ow controllers on a single loop in
parallel.
NOTE: Refer to section 3.6.3 for multi-unit conguration
instructions.
OPTION SELECTION
MOTORIZED VALVE OFF
COMPRESSOR ASCD 5
PREVIOUS NEXT
� CAUTION! �
CAUTION! This is a Commercial option only and does not
alter Residential unit operation.
UNIT CONFIGURATION
CURRENT CONFIG TE026
HEAT PUMP FAMILY TE
HEAT PUMP SIZE 026
BLOWER TYPE ECM
LOOP CONFIG VS PUMP
SELECT OPTION
PREVIOUS SAVE
VARIABLE SPD INTERNAL
PUMP CONFIGURATION
LOOP OPTION PARALLEL
PUMP CONTROL DELTA T
HEATING DELTA T 7 F
COOLING DELTA T 10 F
MAXIMUM HEAT LWT 80 F
MINIMUM COOL LWT 40 F
PREVIOUS SELECT
3.4 PUMP CONFIGURATION
vFlow™ vs internal ow control pump can be controlled either
through temperature differential (Delta T) or can be set to
specic speed (xed; % of full speed for each heat and cool
stage).
Can be congured for either single pumping or parallel
pumping.
Congure temperature differentials at the thermostat for
vFlow™ units with an internal ow control pump.
Adjust the Pump Conguration 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)
Maximum Heat LWT (valid range based on specic model;
refer to model IOM). Minimum Cool LWT (valid range based
on specic model; refer to model IOM).
NOTE: Refer to section 3.6.3 for multi-unit conguration
instructions.
To control vs pump by xed speed, select ‘Pump Control’,
press , use down arrow to select ‘Fixed’, and press to
save.
Default stored in control. Valid range: 15% - 90% (in 1%
increments)
Heating Stage 1 Cooling Stage 1
Heating Stage 2 Cooling Stage 2
If Loop Option is set to ‘PARALLEL’, valid range changes to
50-90% (in 1% increments).