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Fan Motor Options
LV Heat PumpSeries
LV Heat Pump Series
8 733 905 683 (2013/04)
Subject to change without prior notice
Constant Airflow Motors (ECM)
For installations where constant air delivery is
critical or where external static pressure drop can
vary greatly (such as with high MERV value filters)
the LV series is offered with a constant air flow
ECM motor option. This option provides ECM
motor efficiency combined with a constant air
delivery across a wide range of external static
pressures. These motors dynamically adjust their
power output to precisely match the desired air
flow on a pre-programmed fan curve. Additionally
these motors feature:
1. A low CFM ventilation feature that circulates
air at 70% of full load when fan only is called.
2. A passive dehumidification mode that reduces
air flow during a cooling call when
dehumidification is also required – this
reduces the sensible heat ratio of the cooling
coil and extends cooling run time to more
effectively dehumidify. (refer to the ECM
Interface Board section of this manual)
3. 3 speed settings per model. Units are factory
set to “NORM” but can be field adjusted to “+”
to increase CFM by 15% or to “-“ to reduce
CFM by 15%. (refer to the ECM Interface
Board section of this manual)
4. A “TEST” mode that operates the motor at a
70% torque setting. This setting can be used
to diagnose programming problems in the
motor itself. (refer to the ECM Interface Board
section of this manual)
5. A CFM indicator light that provides a blink for
each 100 CFM of air delivered (note that this
blink code is approximate and should not
replace test and balancing).
Refer to the constant air flow motor performance
tables for heat pump blower performance with the
constant air flow motor option.
Table 7: Constant Airflow Motor Performance Table
Model
Fan
Speed
Rated
Airflow
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
LV-015
A - Low
450
450
450
450
450
450
450
440
440
430
-
-
A -
Normal
500
500
500
500
500
500
500
500
480
470
460
-
-
A - Hi
580
580
580
580
580
580
580
570
560
550
-
-
LV-018
B - Low
550
540
540
540
540
540
540
530
520
500
-
-
B -
Normal
650
650
650
650
650
650
650
640
630
610
590
-
-
B - Hi
750
750
750
750
750
750
740
730
710
690
-
-
LV-024
C - Low
720
720
720
720
720
720
720
700
650
560
-
-
C -
Normal
850
850
850
850
850
850
850
850
850
800
700
-
-
C - Hi
960
960
960
960
960
960
960
960
880
790
-
-
LV-030
D - Low
810
810
810
810
810
810
810
810
810
810
-
-
D -
Normal
950
950
950
950
950
950
950
950
950
950
950
-
-
D - Hi
1090
1090
1090
1090
1090
1090
1090
1090
1090
1090
-
-
LV-036
A - Low
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
-
-
A -
Normal
1200
1200
1200
1200
1200
1200
1200
1200
1200
1200
1200
-
-
A - Hi
1380
1380
1380
1380
1380
1380
1380
1380
1380
1380
-
-
LV-041
A - Low
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
-
-
A -
Normal
1200
1200
1200
1200
1200
1200
1200
1200
1200
1200
1200
-
-
A - Hi
1380
1380
1380
1380
1380
1380
1380
1380
1380
1380
-
-