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
8
VARIABLE SPD INTERNAL
PUMP CONFIGURATION
PUMP CONTROL DELTA T
HEATING DELTA T 7
COOLING DELTA T 10
MAXIMUM HEAT LWT 80
MINIMUM COOL LWT 40
PREVIOUS SELECT
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.
• Compressor ASCD (Anti-Short Cycle Delay)
(default stored in control)
– valid range: 5 to 8
(in 1 minute increments)
NOTE 1:
The Compressor Anti-Short Cycle Delay setting
provides equipment protection by forcing the compressor to
wait a few minutes before restarting.
NOTE 2:
If multiple units are connected to one thermostat,
refer to section 3.6 for unit selection.
3.3 UNIT
CONFIGURATION
Adjust the Unit Confi guration settings including Heat
Pump Family, Heat Pump Size, Blower Type, and Loop
Confi guration using the up/down arrow buttons. Press the
center button to select each item.
• Heat Pump Family (default stored in control) –
valid range: YF, YG
• 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
Confi g (default stored in control) –
valid
range: Other, VS PUMP SINGLE, VS PUMP
PARALLEL, MOD VALVE, MOD VALVE MIN POS
Airfl ow, pump and valves can be confi gured from ‘System
Confi guration’ screen.
Select ‘VS PUMP PARALLEL’ when applying multiple internal
fl ow controller units to a single loop in parallel.
NOTE:
Refer to section 3.6.3 for multi-unit confi guration
instructions.
3.4 PUMP
CONFIGURATION
Integrated Variable Speed internal flow control pump can be
controlled either through temperature differential (Delta T) or
can be set to specific speed (fixed; % of full speed for each
heat and cool stage).
Confi gure temperature differentials at the thermostat for
Integrated Variable Speed Water Flow Control units with an
internal fl ow control pump.
Adjust the Pump 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)
Maximum Heat LWT (valid range based on specifi c model;
refer to model IOM). Minimum Cool LWT (valid range based
on specifi c model; refer to model IOM).
NOTE:
Refer to section 3.6.3 for multi-unit confi guration
instructions.
UNIT CONFIGURATION
CURRENT CONFIG YF024
HEAT PUMP FAMILY YF
HEAT PUMP SIZE 024
BLOWER TYPE ECM
LOOP CONFIG VS PUMP
PARALLEL
SELECT OPTION
PREVIOUS SAVE
To control vs pump by fi 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 Pump Confi guration is set to ‘VS PUMP PARALLEL’, valid
range changes to 50-90% (in 1% increments).
