FB, FE, FF1E, FFM, FG, FH, FJ, FMA, FT, FV, FX, FY, FZ, F54, PF: Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
10
motor. Energizing W without G will result in 25% lower airflow
delivery. The selected delay profile is not active in this mode.
Super Comfort Heat Mode
This is a special heating mode only available on FV4 fan coils combined
with a Thermidistat Control or Comfort Zone II-B. When this option is
selected, the indoor control will monitor the outdoor temperature. The
control will drop the G signal to the fan coil when the outdoor
temperature is between 10° and 40° F. This triggers the motor to slow to
approximately 213 CFM per ton. The heaters will stage as needed during
this mode and the motor will adjust airflow as required. Below 10° F, the
W1 control output will automatically energize on a call for heat. The
ECM2.3/5.0 power connections are made at the transformer primary
terminals. The transformer secondary connections are made at SEC1 and
SEC2 connectors.
Easy Select Configuration Taps
The Easy Select taps are used by installer to configure system. The
ECM2.3/5.0 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. 8).
The FV4 and FT4 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 ECM2.3/5.0 will run the
higher of heat pump airflow and electric heater airflow. The factory
default selection is largest heater range approved (Fig. 8).
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. 8).
The letters A, B, C, D may be marked on the silk screen. In that case, use
the unit’s installation instructions to determine the Aux heat and AC/HP
size. See Fig. 9.
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. 8).
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. 8).
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. 8). 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 is 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
at 70 percent airflow and no OFF delay.
Continuous Fan
Select desired continuous-fan profile LO, MED, or HI. Airflow are
provided to customize and enhance the continuous fan functions (Fig. 8).
The possible selections are:
1. LO – provides 50 percent of Y/Y2 Cool airflow.
Table 5 – Airflow Adjustment Table
Unit Size AUX Heat Range (kW/CFM)
VIO A B C D
24 0-20 / 1200 0-15 / 1050 0-10 / 750 0-5 / 700
36 0-20 / 1225 0-15 / 1050 0-10 / 750 0-5 / 700
48 0-30 / 1500 0-20 / 1350 0-15 / 1200 0-10 / 1000
60 0-30 / 1750 0-20 / 1350 0-15 / 1250 0-10 / 1200
AC/HP Size
BLU A B C D
24 036 030 024 018
36 042 036 030 024
48 048 042 036 030
60 060 048 042 036
To Next Page
Loading...
