28 | Fan Motor Options LV Heat PumpSeries
LV Heat Pump Series8 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 - -
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