FCM4, FEV, FEM4, FJM, FMA4, FSA4, FSM4, FSU4, FVM4, FXM4, REM4, WAH, WAM, WAP, WAX, WBHL: Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
8
Heat Pump Heating Mode — Single Speed or Two-Speed High
Thermostat closes R to Y/Y2 and R to G. A circuit R to Y1 is required
for two-speed high operation. The unit delivers airflow selected by
AC/HP SIZE selection and CFM ADJUST selection. Selected delay
profile is active in this mode.
Heat Pump Heating Mode — 2-Speed Low
Thermostat closes R to G and R to Y1. Unit delivers two-speed low
airflow for AC/HP SIZE and CFM ADJUST selected. Selected delay
profile is active in this mode.
Non-Staged Auxiliary with Heat Pump Heating Mode
Thermostat should already have closed R to G, R to Y2 for heat pump
heating operation. With J2 jumper in place, energizing either W1 or W2
will produce the W2 airflow. This is the greater of heat pump heating
and auxiliary heat airflow plus an additional 15 percent. The elected
delay profile is not active in this mode.
Staged Auxiliary Heat with Heat Pump Heating Mode
The auxiliary heat can be staged by removing the J2 jumper that ties W1
and W2 terminals together. Staging can be done by using outdoor
thermostats or by using the heat staging option where the indoor control
can be configured for three-stage electric heat. The unit will
automatically adjust airflow when the different stages of heat are
energized. The airflow delivered will depend on the heat pump size
selected and electric heat size selected. The greater of the two airflows
will be delivered. The selected delay profile is not active in this mode.
Electric Heat without Heat Pump
Thermostat closes R to W and thermostat should be set up to energize G
with W. This is due to the Super Comfort Heat programming in the
motor. Energizing W without G will result in 25% lower airflow
delivery. The selected delay profile is not active in this mode.
EASY SELECT CONFIGURATION TAPS
The Easy Select taps are used by installer to configure system. The ECM
5.0 uses selected taps to modify its operation to a pre-programmed table
of airflows. Airflows are based on system size and mode of operation
and those airflows are modified in response to other inputs such as the
need for de-humidification (Fig. 5).
The FVM4 Fan Coils must be configured to operate properly with
system components with which it is installed. To successfully configure
a basic system (see information printed on circuit board located next to
select pins), move the six select wires to pins which match components
used, along with homeowner preferences.
Auxiliary Heat Range
The installer must select the auxiliary heat airflow approved for
application with kW size heater installed. Each select pin is marked with
a range of heaters for which airflow (also marked) is approved. For
increased comfort select the narrowest kW range matching the heater
size, for example, 0–10 for a 10 kW heater. This airflow must be greater
than the minimum CFM for electric heater application with the size
system installed for safe and continuous operation. Note that airflow
marked is the airflow which will be supplied in emergency heat mode
and heating mode on air conditioners when electric heat is primary
heating source. To ensure safe heater operation in heat-pump heating
mode, when electric heaters are energized, the ECM 5.0 will run the
higher of heat pump airflow and electric heater airflow. The factory
default selection is largest heater range approved (Fig. 5).
AC/HP Size
The factory default setting for air conditioner or heat pump size is largest
unit meant for application with model of fan coil purchased. The
installer needs to select air conditioner or heat pump size to ensure that
airflow delivered falls within proper range for size of unit installed in all
operational modes (Fig. 5).
Unpack unit and move to final location. Remove carton taking care not
to damage unit. Inspect equipment for damage prior to installation. File
claim with shipping company if shipment is damaged or incomplete.
Locate unit rating plate which contains proper installation information.
Check rating plate to be sure unit matches job specifications.
System Type
The type of system must be selected.
1. AC—air conditioner (approx. 350 CFM/ton)
2. HP–COMFORT—provides lower airflow than air conditioner
selection (approximately 315 CFM/ton) in heating mode. In cooling
mode supplies 350 CFM/ton.
3. HP–EFF—provides same airflow for heat pump heating and
cooling modes (approximately 350 CFM/ton).
The factory setting is AC (Fig. 5).
AC/HP CFM Adjust
Select low, nominal, or high airflow. The factory selection is NOM. The
adjust selections HI/LO will regulate airflow supplied for cooling and
heat pump heating modes only, +15 percent and -10 percent respectively.
The adjust selection options are provided to adjust airflow supplied to
meet individual installation needs for such things as noise, comfort, and
humidity removal (Fig. 5).
ON/OFF Delay
NOTE: ON/OFF Delay is active only in cooling and heat pump only
heating modes. In auxiliary heat mode or emergency heat mode, the ON
delay is 0 seconds and the OFF delay is fixed and cannot be overridden.
Select desired time delay profile. Four motor-operation delay profiles are
provided to customize and enhance system operation (Fig. 5). The
selection options are:
1. The standard 90-seconds off delay (factory setting 0/90).
2. No delay option used for servicing unit or when a thermostat is
utilized to perform delay functions (0/0).
3. A 30-seconds on/90-seconds off delay profile used when it is
desirable to allow system coils time to heat up/cool down prior to
airflow. This profile will minimize cold blow in heat pump
operation and could enhance system efficiency (30/90).
4. ENH, enhanced selection provides a 30-seconds on/150-seconds off
at 70 percent airflow and no off delay.
Table 4 – Typical Operating Modes
Operating Mode Terminals Energized
Heat Pump Only Heating R, Y/Y2, G, DH
Heat Pump Only Heating + Super Comfort Heat Mode R, Y/Y2, DH
Heat Pump Heating + Auxiliary Heat (non-staged) R, Y/Y2, G, DH, W2
Cooling R, Y/Y2, G, DH, O
Cooling + Dehumidification R, Y/Y2, G, O
Cooling + Superdehumidification R, Y/Y2, O
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