Wiring And Connections - Field Controls FCMC Manual

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
- 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
- "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
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).
780110400 | RevA | 07/23
Figure 1
Figure 3
Figure 5
Figure 2
Figure 4
Figure 6