Smart ‘S’
TWINFAN CONTROL
Installation and Maintenance
3
Fig. 4. A typical Quietwin graph
Commissioning Procedure (see fig. 2).
1.
Switch on the supply to the QTI Quietwin fan.
2.
Locate the control module panel Care must be taken if
the module has any covering panels removed as live
230v incoming supply terminals may be exposed.
Note covers MUST be properly replaced when commission
ing has been completed.
3.
Wait approximately 60 seconds for the system to complete
its self test’
4.
Press the step sequencing button several times until only
the ‘FAN 1’ light is illuminated and the ‘AUTO’ light is
off. (See detail of control panel Fig. 2).
5.
Connect a manometer across the tappings provided on the
outside of the fan casing. Reading the manometer and using
the graph, determine the airflow. The fan is factory set at
full speed. Using the rotary graduated control,reduce the
speed to the desired setting (may require a screwdriver).
NOTE: allow 30 seconds for the fan to reach the set speed.
6.
Set the Run on timer control. (Adjustable 5-60 min).
(See detail of control panel Fig. 2).
7.
Press the step button through the sequence until ‘AUTO’
light shows.
COMMISSIONING IS NOW COMPLETE.
Using the graphs
(SPECIFIC GRAPHS FOR YOUR
QUIETWIN FAN ARE SHOWN IN THE
FAN INSTALLATION & MAINTENANCE
LEAFLET).
The graphs are designed to assist you in establishing an AIR
VOLUME FLOW RATE for your fan installation.
The curves shown indicate performance at 100%, 75% and 50%.
Assuming that the ventilation system is installed and the fan is
connected to all ductwork. Connect a manometer across the
tappings provided on the outside of the fan unit casing.
The fan is factory set for full speed. With the fan operating at this
full speed (100%) take a pressure reading in Pa from the
manometer. Refer to the relevant graph for your size of unit and
with your Pa figure, read across the graph to where the line
intersects the 100% curve.
Drop a line vertically down from this point and the air volume
flow is indicated on the base line of the graph.
See the fan Installation & Maintenance leaflet supplied.
Using the Step button (see fig 2).
Refer to the label on the controls inside cover for more guidance.
Pressing the step button will sequence through the options and
change the modes as follows:
1. FAN 1 in manual mode (used for commissioning)
2. FAN 2 in manual mode (used for commissioning)
3. SYSTEM OFF
4. SYSTEM IN AUTOMATIC (normal selection)
To clear a fail, press the STEP button until the fail has cleared.
IMPORTANT After commissioning, press the STEP but-
ton through until AUTO is illuminated.
System is now in automatic mode.
EXTERNAL USE QUIETWINS WITH THE SMART
CONTROL OPTION ARE PROVIDED WITH A COM-
MISSIONING BOX ON THE OUTSIDE OF THE CASE
The main control module is inside the fan (See fig 5).
Control Module Connections /Inputs and
their uses (see fig 2)
SENSOR INPUT 1:
This is the Master on/off control input and is usually ‘linked out’
with a special plug unless:
A Timeclock can be connected into this input e.g. ST-TC
During ON times the unit is allowed to operate.
During OFF times the unit is off- zero duty.
Note: The ST-TC Timeclock must always be plugged into the fan
mounted control module NOT into a ST-JB junction box.
SENSOR INPUTS 2, 3 & 4
Any sensor can be connected to these inputs to allow activation
of the unit. If any of these inputs is activated, the unit will run at
the maximum set duty. These sensors include ST-PIR,
ST-HUM, ST-TEMP.
Note: Additional sensors may be added by using an ST-JB Junction Box.
SWITCH LIVE terminals
This acts just like the sensor inputs 2,3,4. If 230v ac is detected
on the SW - Live terminals, the unit will run at the max. set duty
DAMPER terminals (2 sets)
When the fan is running at full duty, both these damper connec-
tions will be activated. i.e. power will be available on the OP
terminals of the damper connections. The fan will not go to full
duty until the RET terminals have 230v ac (Limit Switch).
FAILURE RELAY
This relay is normally closed when there are no faults. When
faults occur this relay will open and break the circuit. This
method of operation allows all types of failure to be detected for
example ‘Power failed’, ‘Fan/s fail.
This connection is a volt free switch. it can handle power up to
5A (230v) and is fused for protection.
NO FAULT: The volt free switch is closed i.e. the two
terminals are connected.
FAN FAULT: The volt free switch is opened. i.e. the two
terminals are disconnected.
