Field Controls FCMC User manual

FRESH COMMAND MULTI-FAMILY CONTROL
Model: FCMC
780110400 | RevA | 07/23
READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY BEFORE PROCEEDING WITH THE INSTALLATION
This device MUST be installed by a qualifi ed agency in accordance with the manufacturer’s installation instructions. The defi nition
of a qualifi ed agency is: any individual, fi rm, corporation or company which either in person or through a representative is engaged
in, and is responsible for, the installation and operation of HVAC appliances, who is experienced in such work, familiar with all
the precautions required, and has complied with all the requirements of the authority having jurisdiction. Please retain these
instructions after installation.
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ITEMS INCLUDED WITH FCMC
1. FCMC Unit
2. Cover
3. Mounting Plate
4. Screws
The Field Controls Fresh Command MultiFamily Control (FCMC) is designed to provide fresh air ventilation year-
round, keeping energy conservation, indoor air quality and comfort in mind. The FCMC delivers ventilation along
with many additional features:
• Complies to ASHRAE 62.2 2010; 2013; 2016; 2019(+)
• Auto-senses 8 key factors to balance temperature and humidity regardless of climate zone
• Built-in temperature and humidity sensor with no additional wiring needed
• Quick-Start Test feature for an immediate test cycle
• Fast Click® lock cover deters tenant or renter interference
• Seeks to ventilate with a heating or cooling call for optimal comfort and effi ciency
• One dial to adjust intermittent ventilation
• On/off switch with easy access that does not require cover removal
3. MOUNTING PLATE
1. FCMC UNIT
VENTILATION
CONTROL
MODULE
2. COVER
PRODUCT OVERVIEW
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4. BAGGED
HARDWARE
KIT

SAFETY CONSIDERATIONS
Understand the signal words DANGER, WARNING, and CAUTION. These words are universally used for overall safety.
DANGER identifi es the most serious hazards which will result in severe personal injury or death. WARNING signifi es hazards
which could result in personal injury or death. CAUTION is used to identify unsafe practices resulting in minor personal injury
or product and property damage.
DANGER
• To prevent serious injury from electrical shock, this product must be installed by a
qualified agency.
• Associated voltage potential inside if air handler wiring compartments has the potential
to cause serious injury or death from electric shock. Some installations may require
electrical connections to high voltage sources.
• Before installing the FCMC, turn off all power to your HVAC system.
• When servicing FCMC system or components attached to FCMC system, turn off all
power to these items.
CAUTIONS
• Read entire manual and follow all instructions carefully.
• Follow all local electrical codes during installation.
• All wiring must conform to local and national electrical codes.
• Use caution when mounting components to surfaces that may have concealed wiring
beneath the surface.
• Do not use the ventilation system for removal of fl ammable fumes or gases.
• Do not install ventilation controller in an outdoor location and/or wet location.
• Do not obstruct or cover the fresh air intake or air outlet of the ventilation system.
• Provisions should be made for make-up air requirements based on recommendations set forth
by governing agency to meet applicable building codes and ventilation standards.
WARNING
• Sharp metal edges (ductwork) can cause serious injury from cuts.
• Wear appropriate gloves when cutting, drilling and grinding plenum openings and handling
ductwork.
• Wear appropriate eye protection when drilling, grinding and/or cutting ductwork.
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Power
Input Voltage 16-32 VAC
Full Load Power 1.28W @ 27.4VAC
Idle Power 270mW @ 27.4 VAC
Wiring Requirements 18-22 AWG, 24 VAC (Min)
Operating Temperature Range 10°F to 160°F
Operating Humidity Range 5 to 95% RH (non-condensing)
FCMC PRODUCT SPECIFICATIONS:
Outputs
Fan Output GF
(Maximum Load Current)
8A inductive @30VAC
Vent (V,V)
(Maximum Load Current)
8A inductive @30VAC, or 30VDC

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FCMC DIMENSIONAL DATA
FCMC LAYOUT - OVERVIEW
VENTILATION
CONTROL
MODULE

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FCMC INSTALLATION WITH FAPV FCMC INSTALLATION WITH FAD
INSTALLATION
The FCMC has been designed to install directly to the wall in the mechanical utility closet. Refer to the below
installation diagrams for additional information.
The FCMC will perform best if the control is mounted where both outside air and return air can blend. Mount-
ing the FCMC away from the return or too close to the fresh air discharge may result in reduction of fresh air
ventilation.

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The FCMC can be mounted directly or with the optional mounting
adapter plate. If mounting to a mud ring or single junction box,
the mounting adapter plate should be used. It has two beveled
holes for fl at #6 screws for securing to a standard junction box.
1. If using the adapter plate – Route the wires through the
opening in the adapter plate. Mount the adapter plate to
the wall. (Figure 1)
2. Pass the wires through one of the two rectangular cut
outs on the left side of the control’s base. (Figure 2)
3. Secure the Ventilation Control Module to the adapter
plate/wall using included screws. Keep the wires/cable
in the wire trough/raceway while securing. (Figure 3)
It is possible to connect the wires to the terminal block
before securing the control if that is easier.
4. Connect the wires to the terminal block (Figure 4) per
the “Wiring & Connections” section below.
5. Set the Ventilation Time dial (marked “MINUTES PER
HOUR”) per the “Setting Ventilation Time” section of
this manual, on page 9. (Figure 5)
6. Once testing is complete, place cover on Ventilation
Control Module.
7. Set ON/OFF switch to ON for unit to begin functioning.
(Figure 6)
WIRING & CONNECTIONS
The FCMC has 6 terminals to interface between the thermostat and (AHU) air handler unit. The terminal designa-
tions are as follows:
• C is the common from AHU
• Y is the compressor signal from the thermostat and AHU
• W is the heat signal from the thermostat and AHU
• R is the 24VAC hot from AHU
• GF is the fan signal to the AHU
• GT is the fan signal from the thermostat
- “V” Terminals are used to control a fresh air damper or powered ventilator
- Isolated from the 24VAC supply
- One terminal must be connected to the R (24VAC) power side of the supply transformer
- Active during ventilation calls
- Heat Pump: Connection to “Y” terminal is required to allow
ventilation during heating/cooling, FCMC does not require
connection to the B or O signal lines
- Dual Fuel Heat Pump: “W” terminal is used to monitor heating
- Conventional Heat/Cool Unit: Requires both “Y” & “W” terminals to
be connected
Under no circumstances shall line voltage (120 VAC) be wired to any FCMC terminals.
This product is rated for Class 2 low voltage US. Ratings 30VAC (8A max load). The
V terminals are dry contact compliant, and suitable for up to 30VDC (8A max load);
30 VAC (8A max load).
Figure 1
Figure 6Figure 5
Figure 3 Figure 4
Figure 2

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SETTING THE VENTILATION TIME
If the ventilation time is NOT known:
1) Lookup or calculate the continuous ventilation rate Qtot (2013 to current):
Qtot=0.03 (fl oor sq.ft.) + 7.5 (Nbr +1)
2) Lookup* or measure the Intermittent ventilation fl ow rate (FAV rate)
If this is unknown, the fl ow rate can be measured with appropriate tools and should be done with the central
fan operating. This can be initiated using the quick start method detailed later in the manual FAV rate can
also be approximated using look-up tables if the duct length, diameter, and number of bends are known.
3) Calculate the ventilation Time:
Time = (Qtot X 60) / (FAV rate)
TIME
CONTROL
KNOB
Set the knob to the appropriate number of minutes per the calculation above.
Qtot
FAV Rate
Time = X 60 =
If the ventilation time is already known, rotate the knob to the appropriate number.
KEY
Qtot: Continuous Ventilation Rate
Nbr: Number of Bedrooms
FAV Rate: Intermittent Ventilation Rate (CFM)
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*Lookup is in reference to architectual drawings that include an HVAC schedule, table, or defi ned FAV fl ow
rates for each apartment size and their associated (AHU) Air Handler Unit equipment.

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FCMC OPERATION
The Fresh Command Multifamily Control (FCMC) automatically responds to environmental conditions to support
indoor comfort and conserve energy while supplying fresh air ventilation. Based on AHU operation and measured
air quality, the device will automatically adjust between free running and synchronized modes to prevent undesired
temperature and humidity.
• Free running operation (Spring/Fall) - 30-minute fresh air cycle period
• Synchronized operation (Summer, Winter) – Device synchronized with AHU operation
VENTILATION SEQUENCE
1. The ventilation sequence starts with controlling the central fan of the air handler unit (AHU).
2. The FCMC measures the indoor temperature and relative humidity before any ventilation activity begins.
3. If the equipment is active (heating, cooling, or constant fan), the starting sequence will be bypassed as
the measured air fl owing into the mixing plenum will be the room air.
4. If the equipment is inactive and the FCMC starts a ventilation function, it will operate in free-running
operation as this does not require synchronization of FAV and AHU.
The table below is a simplifi ed FAV time based on RH through the three seasons. The actual operation takes
more than RH into account.

MAINTENANCE AND TROUBLESHOOTING
Follow individual exhaust fan device manufacturer’s troubleshooting and maintenance information.
There is no routine maintenance required for the FCMC (controller) other than making sure the wires connected
to the FCMC terminals are secure and the unit mounting screws are tight.
Field Controls Technical Support is available Monday-Friday from 8:00 am to 5:00 pm (EST) at 800.742.8368 or
by email at fi eldtec@fi eldcontrols.com for further assistance. To reprint a copy of the latest revision of this manu-
al, visit www.fi eldcontrols.com to download.
SYMPTOM TROUBLESHOOTING PROCEDURE
Central fan turns on unexpectedly. If ventilation requirement has not been met, the FCMC will
activate the central fan. This is normal operation.
The fresh air damper does not open
during call for ventilation.
• Damper is not plugged in or properly wired. Check
connector and wiring connections.
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MODEL DESCRIPTION FC P/N
FAD-4 4” FRESH AIR DAMPER 46590504
FAD-5 5” FRESH AIR DAMPER 46590505
FAD-6 6” FRESH AIR DAMPER 46590506
FAD-7 6” FRESH AIR DAMPER 46590507
FAD-8 8” FRESH AIR DAMPER 46590508
FAD-10 10” FRESH AIR DAMPER 46590510
FAD-12 12” FRESH AIR DAMPER 46590512
FAPV-180AC FRESH AIR POWER VENTILATOR 602603700
OPTIONAL ACCESSORIES
QUICK START VENTILATION
- Functions as a “Soft Off ”
- Does not break any power circuits to the control
- Disables the ventilation functions such that the FCMC will not activate
the venting relay or turn on the central fan
- Continues to monitor indoor conditions when the equipment is
operating and when it is not
- “Off ” state does not interfere with fan control from the thermostat
- Activates when the On/Off switch is moved to the “On” position after being set to “Off ” for at least 5 seconds
- Can be used to validate the installation of the control and fresh air appliance
- Turns on the central fan, followed by ventilation activity within 10 seconds. Runs a full cycle and will operate
normally after that point
- Temporary loss of power will not aff ect or enable this function

This manual may be downloaded and printed from the Field Controls website:
www.fi eldcontrols.com
WARRANTY
For warranty information about this or any Field Controls product, visit:
www.fi eldcontrols.com
Field Controls Customer Service
252.522.3031
780110400 | RevA | 07/23© Field Controls, LLC
Phone: [phone] | Fax: [phone] | fi eldcontrols.com