CONTROLS
The fan filter unit can be controlled through various inputs:
1. Local setpoint control (blue light behind S will be lit on face display)
- Adjust airflow from the face. When adjusting the setpoint will be displayed and the four decimal points will be lit to indicate sepoint.
- Local setpoint, no face display. If not equipped with a face display and locally controlled, the POT on the EC Motor Control Board is used.
- To toggle between local control and external control hold the Start/Stop button for 10 seconds. When released the blue light with change.
2. Individual unit wall mounted control (must be determined before ordering)
3. 0 - 10V/0 - 5V DC Control
4. 0 - 20mA/4 - 20mA Control
5. Full range of network controls including connection to BAS/BMS through MODBUS RTU RS485 control
- BACNet IP, BACNet MS/TP, & LONWorks available with additional hardware
Additionally, monitoring and control of the FFU can be done through closed loop control from sensors such as
pressure transducers, thermostats, partical counters, etc.
This manual will give basic information on how to connect controls and sensors to the unit. For more details refer
to the instructions included with the controller or sensors.
SIGNAL BEHAVIOUR
The Network CFM Setpoint is read and written directly in units of CFM.
External analog signals are scaled to a minimum and maximum airflow when in CFM control mode.
IE: 0-5VDC 2.5VDC=0.5 of full range. = 0.5*unit maximum CFM.
When operated from an external setpoint or network value 0-10% is reserved for local over-ride of the EC Moctor Control board POT so the unit can be
adjusted from the main control board. 10%-20% is reservered for the remote Off Signal.
INP1/ANA1 Input
Control Function: % of Input Range
Range
Units
ECM Control Pot
0-10%
Remote Off
10-20%
External Setpoint
20-100%
0-5
Volts
0 to 0.5
0.5 to 1.0
1.0 to 5.0
0-10
Volts
0 to 1.0
1.0 to 2.0
2.0 to 10.0
0-20
mA
o to 2.0
2.0 to 4.0
2.0 to 20.0
4-20
mA
0 to 5.6
5.6 to 7.2
7.2 to 20.0
DRAWING NAME
DRAWN
CATEGORY
CHKD
APRVD
PRODUCT
SIZE
TAG
QTY
BRS/SLG
06/13/22
CRITI-CLEAN ULTRA INSTALLATION MANUAL
SSLFHFD-FFU-RF-MEA
REV # F
SHT 14 27
/
SCL
DO NOT
SCALE
1:10
STAINLESS STEEL
CRITI-CLEAN ULTRA
REVERSE FLOW - FAN FILTER UNITS