Specifications

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ENVISION COMMERCIAL SPECIFICATION CATALOG
ECM2 Blower Operation
Blower speeds will be selected through the user interface
or the facility management system. There will be a total
of 12 speeds selectable with only three being selected at
any one time. The lowest numbered speed selection set
to ON will select the low-speed blower setting, the middle
selection set to ON will select the medium-speed blower
setting and the highest selection set to ON will select the
high-speed blower setting. If all selections are set to OFF
the software shall select speed setting 10 for low-speed, 11
for medium-speed, and will select speed setting 12 for high
speed. If only one selection is set to ON, that selection
will set the low-speed blower setting, the medium-speed
setting will be 11, and the high-speed setting will be speed
12. The maximum low-speed setting will be speed 10 and
the minimum high-speed setting will be speed 3.
In addi-
tion there is a low limit setting in the software to prevent the
ECM2 blower speed from being set below acceptable limits
for each unit size.
ECM Blower air flow “Soft Switch Settings”
A set of 12 “soft switches” accessible through the user
interface or building automation system are used to select
the three blower speed settings for the ECM blower motor.
The 12 soft switches work in exactly the same way as the
hardware switches used on the Premier control (Refer to
Blower Performance Data - ECM Motor for proper set-
tings). No more than three soft switches may be set to the
“ON” position. The first “ON” switch (the lowest number
switch) determines the “low speed blower” setting. The
second determines the “medium speed blower” setting,
and the third determines the “high speed blower” setting.
Emergency Heat/Network Enabled Output (BO5)
This output is set from the factory to enable/disable emer-
gency heat. If a problem occurs with the unit resulting in
the compressor being locked out in heating mode, the con-
trol will automatically enable this output to turn on field
installed electric heat. This output is interlocked with the
blower proving input BI-6 (Blower proving sensors must
be field supplied and installed). BI-6 must be connected to
PB2 position 3 (see unit schematic) in the field if no blower
proving sensor is desired. There is a configurable parame-
ter available through a BAS network that must be enabled
if this output is to be commanded over the BAS network.
MUI Alarm History Reporting
If a fault occurs the fault will be recorded in history for
display on the medium user interface in the History Menu.
Each fault type will be displayed in the history menu with
a number between 0 and 3. A reading of 3+ will mean
that fault has occurred more than three times in the past.
The history menu can be cleared with a power cycle only.
Alarm date and time are not included in the history.
Inputs and Outputs Configuration
Field Selectable Options
Freeze Detection Set Point (BI-5)
The freeze detection set point input allows you to adjust
the freeze detection set point (AI-5). When the jumper is
installed on BI-5 (Wire #24) the freeze detection set point
is factory set for 30°F. When the jumper on BI-5 (Wire
#24) is removed the freeze detection set point will be 15°F.
Accessory Outputs (BO-7 and BO-8)
Accessory Output 1 will be energized 90 seconds prior to
the compressor output being energized. Accessory Output
2 will be energized with the blower output (BO-1). When
the corresponding compressor output is turned off the ac-
cessory output will be deactivated immediately. These out-
puts are selectable for normally open or normally closed
operation through the Medium User interface or through
the Building Automation System.
Control Accessories
Zone Sensors
TAXXJ02 Room Command Module•
TAXXA04 LCD Room Command Module•
A99 Sensor•
MUI (LCD User interface) for diagnostics
and commissioning.
MUIK1 - Panel Mount, Portable•
MUIK2 - Wall Mount•
Envision Controls - FX10 cont.
Input Name Input Output Name Output
Zone Temp 1 AI 1 Fan Enable BO1
Relative Humidity Input AI 2 Comp – Low Capacity BO2
Condensate Level AI 3 Reversing Valve BO3
Universal Temp Input AI 4 Comp – Full Capacity BO4
Water Coil Low Temperature Limit AI 5 Network Output/EH Output BO5
Warm/Cool Adjust and Temp Occ AI 6 Alarm BO6
Accessory 1 Output BO7
Occupied BI 1 Accessory 2 Output BO8
Emergency Shutdown BI 2 Network Controlled Output B09
Stage 1 Low Pressure BI 3
Network Viewable Input 1 BI 4 ECM2.3 Blower PWM1
Water Coil Low Temp Limit Set Point BI 5 Network Controlled Output PWM2
Network Viewable Input 2 BI 6
Thermostat Y1 BI 7
Thermostat Y2 BI 8
Thermostat O BI 9
Thermostat G B10
Stage 1 High Pressure BI11
Compressor Proving BI12
XP10 Expansion Card
Input Name Input Output Name Output
Unused AI 1 Unused BO 1
Unused AI 2 Unused BO 2
Unused AI 3 Unused BO 3
Unused AI 4 Unused BO 4
SINGLE and DUAL STAGE WATER-TO-AIR