NuAire QUIETWIN QTR Instruction Manual

QTR B units (sizes A,B & C) are supplied with a rigid alu-
minium alloy rectangular bottom inlet spigot and 2 opposed
outlet grilles (size D has a rectangular end inlet or bot-
tom inlet spigot and a rectangular end outlet louvre).
QTR C units (case sizes A,B & C) are supplied with a rigid
aluminium alloy CIRCULAR end inlet spigot and 2 opposed
outlet grilles.
QTR S units (case sizes A,B & C) are supplied with a rigid
aluminium alloy SQUARE end inlet spigot and 2 opposed
outlet grilles.
NuAire Limited
Western Industrial Estate
Caerphilly,
Mid Glamorgan CF83 1XH
Telephone: [phone]
Facsimile: 01222 887033
Email: [email protected]
Leaflet 670922
FEBRUARY 1999
QTR QUIETWIN
Belt Drive Twinfans
Single & three phase, roof mounted
NOTE:
This leaflet covers QTR units with case
SIZES A, B ,C & D
Included are both end inlet and bottom
inlet configurations.
The ‘D’ size units differ in that they are
larger fans featuring a louvred end outlet.
The NuAire QUIETWIN Twinfan Belt Drive range consists
of 4 basic designs with duties up to a maximum of 9m3/s.
The 4 models are coded as follows:
QTE (External Duct Mounted) in line unit
QTR (Roof Mounted, end inlet) side exhaust unit.
QTRB (Roof Mounted bottom inlet) side exhaust unit.
QTRD Case size D. This is a large roof mounted fan,
(bottom or end inlet) with end louvred exhaust.
QTR Quietwin models
Units are rectangular in section and have circular or square*
rigid spigots at each end. The casing is manufactured from
heavy gauge natural aluminium alloy.
A full size internally lined access panel is fitted to the top face.
The panel is fully detachable for inspection purposes.
The motor plate and frames are supported on the base by
resilient mountings allowing the fan unit to be operated with-
out the need for separate anti vibration fan case mountings.
The units incorporate two independent motors with high effi-
ciency, forward curved centrifugal impellers running in metal
scrolls. Taperlocked pulleys and wedge drive belts are
employed. The fans discharge into a common outlet chamber
through a shutter system that prevents ‘blowback through the
standby fan.
The motors are manufactured to BS 5000 and are suitable for
single phase (case ‘A’ only) or three phase supply. Airflow and
failure monitors are standard as is Class B insulation. Suitable
for operation in ambient temperatures up to 40oC.
* Case size D has rectangular spigots.
Installation
and Maintenance
Contents Page
Coding 1
Dimensions 2
Installation 2
Motor electrical details 3
Roof aperture & curb details 5
Electrical installation 6
Service 6
Control option ‘M’ Microsave 7
Control option ‘C’ Mains 9
Maintenance 11
Ordering Spares 13
Certification 14
1
Fig. 1. General view of a typical QTR unit
QTR
QTR= Quietwin, roof mounted, external use.
B = rectangular bottom inlet spigot & opposed outlet grilles.
A = Case size A,B,C & D
1 = Fan performance curve number.
3 or 1 = 3: 3ph 400v, 1: 1 ph 230v
M= Microsave integral fan control.
C = Mains fan control.
QTR B A 1 3 C = Quietwin, roof mounted, bottom inlet,
case size A, 3 phase and Mains control.
Coding (bottom inlet units sizes A,B & C).
Coding (end inlet units sizes A,B & C).
QTR= Quietwin, roof mounted, external use.
C = Circular end spigot & opposed outlet grilles.
S = Square end spigot & opposed outlet grilles.
A = Case size A,B,C & D
1 = Fan performance curve number.
3 or 1 = 3: 3ph 400v, 1: 1 ph 230v
M= Microsave integral fan control.
C = Mains fan control.
QTRC A 1 3 M = Quietwin, roof mounted, circular end inlet
spigot, case size A, 3 phase and Microsave control.

AB
Removable
top panel
Rectangular bottom
inlet spigot
Code: QTRB
Control module
located internally
Opposed
outlet grilles
C
EF
Spigot
Unit A B C E F
QTRB A 974 974 622 457 229
QTRB B 1233 1233 701 762 304
QTRB C 1430 1635 796 889 381
NOTE: Rectangular Bottom Spigot only.
Table 1.
Dimensions
QTR Roof Mounted Belt Drive Twinfans
END INLET UNITS
Sizes: A, B & C.
DIMENSIONS (mm)
Table 2. DIMENSIONS (mm)
Fig. 2.
Fig. 3.
For unit weights
see electrical tables
For unit weights
see electrical tables
AB
Removable
top panel
Opposed
outlet
grille
Square inlet
spigot on end
of unit
Code: QTRS
Circular spigot
on end of unit
Code: QTRC
ED dia
E
Control module
located internally
C
QTR ‘C‘ QTR ‘S’
Unit A B C D dia E sq
QTR A 974 974 622 400 305
QTR B 1233 1233 701 500 457
QTR C 1430 1635 796 630 610
NOTE: Circular or Square Spigots.
BOTTOM INLET UNITS
Sizes: A, B, C.
Controls
Two methods of control are available:
i. MICROSAVE (M) control. (leaflet 670915)
ii. MAINS (C) control. (leaflet 670912)
Note that when a Microsave option is supplied, the user
control is included inside the fan case for delivery.
Details of control installations are given in relevant separate
leaflets which deal with each control type.
Installation
Quietwin MUST NOT BE MOUNTED AT AN ANGLE
OF MORE THAN 5OFROM THE HORIZONTAL to
ensure that the shutters operate satisfactorily.
Units should always be positioned with sufficient space
to allow removal of the access covers and subsequent
removal of fan and motor assemblies etc. from above.
The QTR units are supplied for installation onto vertical duct-
work (bottom inlet) roof; back inlet roof and bottom inlet
with end louvre outlet (case size ‘D’) applications. Ductwork
connections must be airtight to prevent loss of performance.
The method of mounting used is the total responsibility of the
installer. the lower edge of the casing has an internal skirt
allowing the unit to be located on an upstand or prefabricated
curb if desired. See prefabricated curb details on page 5.
The unit should be securely screwed to its curb or mounting
to prevent vibration and/or wind damage.
If a unit is converted from bottom inlet to to side inlet after
installation, the redundant bottom inlet must be blanked off at
the spigot. It is essential that the cross sectional area of the new
side inlet is not less than that of the original bottom inlet.
Otherwise severe reductions in performance will occur.
It is the responsibility of the installer to drill the casing to
allow the electrical cables to be connected. The cable entry
should be effectively sealed Note that on the bottom inlet
(QTRB units) the cabling could be carried up from inside the
building, through the bottom inlet spigot.
If a NuAire control has been supplied, wire the control to the
Fan unit and also to the mains supply. The QTR unit has an
internal terminal box and is supplied ready for connection to
the electrical supply via the chosen control. See page 6.
Handling
Always handle the units carefully to avoid damage and distor-
tion. If mechanical aids are used to lift the unit, spreaders
should be employed and positioned so as to prevent the slings,
webbing etc. making contact with the casing.
ELECTRICAL ISOLATION
Note that the unit must be provided with a means of
isolation (by others) for maintenance purposes etc.
A suitable isolator can be supplied by NuAire on
request as a separate item.
Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN
2
QTR= Quietwin, roof mounted, external use.
R = Rectangular end inlet spigot.
B = Rectangular bottom inlet spigot.
D = Case size D only
1 = Fan performance curve number.
3 = 3ph 400v,
M= Microsave integral fan control.
C = Mains fan control.
QTRR D 1 3 M = Quietwin, roof mounted, rectangular end
spigot, case size D, 3 phase and Microsave control.
Coding (bottom/ end inlet units sizes D).

Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN
3
General Electrical Weight
1 Phase (230v) 3 Phase (400V) kg
(nominal)
Unit Speed Power flc sc
Code*rpm
(kw) (amps) (amps)
QTR*A 1-3* 535 0.18 0.75 2.3 73
QTR*A 2-3* 705 0.18 0.75 2.3 73
QTR*A 3-1* 835 0.25 2.1 5.3 75.4
QTR*A 3-3* 835 0.25 0.95 3.0 75.4
QTR*A 4-1* 835 0.37 2.9 7.3 77.5
QTR*A 4-3* 835 0.37 1.3 4.6 77.5
QTR*A 5-1* 935 0.25 2.1 5.3 75.4
QTR*A 5-3* 935 0.25 0.95 3.0 75.4
QTR*A 6-1* 935 0.37 2.9 7.3 77.5
QTR*A 6-3* 935 0.37 1.3 4.6 77.5
QTR*A 7-1* 1045 0.25 2.1 5.3 75.4
QTR*A 7-3* 1045 0.25 0.95 3.0 75.4
QTR*A 8-1* 1045 0.37 2.9 7.3 77.5
QTR*A 8-3* 1045 0.37 1.3 4.6 77.5
QTR*A 9-1* 1045 0.55 3.4 9.3 84.4
QTR*A 9-3* 1045 0.55 1.7 6.8 84.4
QTR*A 10-1* 1125 0.37 2.9 7.3 77.5
QTR*A 10-3* 1125 0.37 1.3 4.6 77.5
QTR*A 11-1* 1125 0.55 3.4 9.3 82.4
QTR*A 11-3* 1125 0.55 1.7 6.8 82.4
QTR*A 12-3* 1125 0.75 2.1 9.5 84.4
QTR*A 13-1* 1225 0.37 2.9 7.3 77.5
QTR*A 13-3* 1225 0.37 1.3 4.6 77.5
QTR*A 14-1* 1225 0.55 3.4 9.3 82.4
QTR*A 14-3* 1225 0.55 1.7 6.8 82.4
QTR*A 15-3* 1225 0.75 2.1 9.5 84.4
QTR*A 16-3* 1225 1.1 2.9 13.0 90.4
QTR*A 17-1* 1335 0.55 3.4 9.3 82.4
QTR*A 17-3* 1335 0.55 1.7 6.8 82.4
QTR*A 18-3* 1335 0.75 2.1 9.5 84.4
QTR*A 19-3* 1335 1.1 2.9 13.0 90.4
QTR*A 20-1* 1400 0.55 3.4 9.3 82.4
QTR*A 20-3* 1400 0.55 1.7 6.8 82.4
QTR*A 21-3* 1400 0.75 2.1 9.5 84.4
QTR*A 22-3* 1400 1.1 2.9 13.0 90.4
QTR*A 23-3* 1400 1.5 3.7 18.5 96.4
CASE SIZE ‘A’
Table 4. Start & Run currents etc.
Electrical Details(See table 3, 4 & 5).
Because the run and start currents depend upon the duty and asso-
ciated ductwork of an individual unit, the values quoted in the
table are nominal.
Run currents will be exceeded if the unit is operated with its cover
removed. It is therefore recommended that the unit is not run for
prolonged periods in this condition.
QTRB D BOTTOM / END INLET
Size: D only.
Rect Spigot
Unit A B C E F
QTRR D 2315 2500 1230 1200 700
QTRB D 2315 2500 1230 1200 700
Table 3. DIMENSIONS (mm)
For unit weights
see table 7
Louvred
end outlet
Bottom rectangular inlet spigot
Code: QTRB
FE
B
A
CF
E
End inlet rectangular spigot
Code: QTRR
Fig. 4.
Testing after Installation
Ensure that the Fan unit and Control and particular control
ancillaries if specified eg PIR, Run/Fail indicators, timeclock etc.
are fitted.
Switch on and check that the fan unit runs satisfactorily.
Using your chosen control, switch over to the standby fan by
means of the control's fan selection switch.
Check that the change-over occurs.
Switch off. If a Run-on Timer is fitted, check that the fan contin-
ues to run.
Time the run-on period, which is adjustable between 5 and 60
minutes nominal.
Timer controls are set at the works to the shortest period.
For speed controls follow the installation set-up procedure
provided with the control.
QTE*B1-3* = Quietwin, duct mounted, external use,
case size B, performance curve 1,
3 phase electrical supply
Control choice ‘M’ or ‘C’
Spigot location choice (see page 1)
** CODING eg.

General Electrical Weight
3 Phase (400V) ONLY (kg)
(nominal)
Unit Speed Power flc sc
Code pm
(kw) (amps) (amps)
QTR*C 1-3* 820 2.2 5.4 27.0 168.7
QTR*C 2-3* 925 2.2 5.4 27.0 168.7
QTR*C 3-3* 925 3.0 6.9 38.0 174.6
QTR*C 4-3* 1040 1.5 3.7 18.5 159.6
QTR*C 5-3* 1040 2.2 5.4 27.0 168.7
QTR*C 6-3* 1040 3.0 6.9 38.0 174.6
QTR*C 7-3* 1040 4.0 10.0 60.0 193.6
QTR*C 8-3* 1160 2.2 5.4 27.0 168.7
QTR*C 9-3* 1160 3.0 6.9 38.0 174.6
QTR*C 10-3* 1160 4.0 10.0 60.0 193.6
QTR*C 11-3* 1160 5.5 12.0 75.0 231.6
QTR*C 13-3* 1260 3.0 6.9 38.0 174.6
QTR*C 14-3* 1260 4.0 10.0 60.0 193.6
QTR*C 15-3* 1260 5.5 12.0 75.0 231.6
QTR*C 16-3* 1360 3.0 6.9 38.0 174.6
QTR*C 17-3* 1360 4.0 10.0 60.0 193.6
QTR*C 18-3* 1360 5.5 12.0 75.0 231.6
QTR*C 19-3* 1440 3.0 6.9 38.0 174.6
QTR*C 20-3* 1440 4.0 10.0 60.0 193.6
QTR*C 21-3* 1440 5.5 12.0 75.0 231.6
General Electrical Weight
3 Phase (400V) ONLY (kg)
(nominal)
Unit Speed Power flc sc
Code rpm
(kw)
(amps) (amps)
QTR*B 1-3* 875 1.1 2.9 13.0 116
QTR*B 2-3* 1005 1.1 2.9 13.0 116
QTR*B 3-3* 1005 1.5 3.7 18.5 125
QTR*B 4-3* 1085 1.1 2.9 13.0 116
QTR*B 5-3* 1085 1.5 3.7 18.5 125
QTR*B 6-3* 1165 0.75 2.1 9.5 113
QTR*B 7-3* 1165 1.1 2.9 13.0 116
QTR*B 8-3* 1165 1.5 3.7 18.5 125
QTR*B 9-3* 1165 2.2 5.4 27.0 134
QTR*B 10-3* 1225 1.1 2.9 13.0 116
QTR*B 11-3* 1225 1.5 3.7 18.5 125
QTE*B 12-3* 1225 2.2 5.4 27.0 134
QTR*B 13-3* 1225 3.0 6.9 38.0 140
QTR Roof Mounted Belt Drive
Twinfans (continued)
Table 5. Start & Run currents etc. CASE SIZE ‘B’
Table 6. Start & Run currents etc. CASE SIZE ‘C’
Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN
4
General Electrical Weight
3 Phase (400v) ONLY kg
(nominal)
Unit Speed Power flc sc
Code rpm
(kw) (amps) (amps)
QTR*D 1-3* 700 1.5 3.7 18.5 682
QTR*D 2-3* 700 2.2 5.4 27.0 691
QTR*D 3-3* 700 3.0 6.9 38..0 697
QTR*D 4-3* 700 4.0 10.0 60.0 716
QTR*D 5-3* 700 5.5 12.0 75.0 730
QTR*D 6-3* 700 7.5 16.0 98.0 750
QTR*D 7-3* 800 1.5 3.7 18.5 682
QTR*D 8-3* 800 2.2 5.4 27.0 691
QTR*D 9-3* 800 3.0 6.9 38.0 697
QTR*D 10-3*800 4.0 10.0 60.0 716
QTR*D 11-3*800 5.5 12.0 75.0 730
QTR*D 12-3*800 7.5 16.0 98.0 750
QTR*D 13-3*800 11.0 23.0 154.0 794
QTR*D 14-3*900 3.0 6.9 38.0 697
QTR*D 15-3*900 4.0 10.0 60.0 716
QTR*D 16-3*900 5.5 12.0 75.0 730
QTR*D 17-3*900 7.5 16.0 98.0 750
QTR*D 18-3*900 11.0 23.0 154.0 794
QTR* D 19-3*900 15.0 30.0 225.0 824
QTR*D 20-3*1000 4.0 10.0 60.0 716
QTR*D 21-3*1000 5.5 12.0 75.0 730
QTR*D 22-3*1000 7.5 16.0 98.0 750
QTR*D 23-3*1000 11.0 23.0 154.0 794
QTR*D 24-3*1000 15.0 30.0 225.0 824
QTR*D 25-3*1000 18.5 38.0 266.0 910
QTR*D 26-3*1100 5.5 12.0 75.0 730
QTR*D 27-3*1100 7.5 16.0 98.0 750
QTR*D 28-3*1100 11.0 23.0 154.0 794
QTR*D 29-3*1100 15.0 30.0 225.0 824
QTR*D 30-3*1100 18.5 38.0 266.0 910
QTR*D 31-3*1100 22.0 44.0 308.0 940
QTR*D 32-3*1200 7.5 16.0 98.0 750
QTR*D 34-3*1200 15.0 30.0 225.0 824
QTR*D 35-3*1200 18.5 38.0 266.0 910
QTR*D 36-3*1200 22.0 44.0 308.0 940
QTR*D 37-3*1200 30.0 59.0 413.0 1030
Table 7. Start & Run currents etc. CASE SIZE ‘D’

Dimensions (mm)
Unit Unit Prefab
Code Code Code A B C D E F G
QTR A QTE A QTPFC 4 767 767 947 947 837 837 75
QTR B QTE B QTPFC 5 973 973 1203 1203 1064 1064 100
QTR C QTE C QTPFC 6 1169 1375 1399 1605 1268 1471 100
Prefabricated Curb
Manufactured in aluminium alloy these curbs will reduce design work
and guarantee correct unit mounting when on site.
Note: Upper faces of curb are fitted with robust sealing strip.
CODES: QTPFC* (typical)
Dimensions (mm)
Unit Unit Prefab
Code Code Code A B C
QTR*A QTE*A QTPFC 4 934 934 305
QTR*B QTE*B QTPFC 5 1233 1233 305
QTR*C QTE*C QTPFC 6 1374 1580 305
Outlet
spigot
Fixings
Unit
support base Fixing
surround
Plinth/
Upstand
.
Unit Plan
Section Through Unit
Support Base
Removable
top covers
Unit support
base
Inlet
spigot
2500
2315
200
1200
1200
200
min100
min
75 50
1790
2490
.
Unit Weight and Fixing
Size D units
For unit weights see electrical
information tables.
Substantial support and fixings
are important due to the units
weight and to avoid the motor
start torque damaging the
support base.
.
.
1740 x 2440
Timber capping
(fixing surround)
Timber capping
(fixing surround)
Brick upstand or
concrete plinth
Floor/Roof
construction
Brick upstand or
concrete plinth
Brick/Concrete Upstand (Section) Brick/Concrete Upstand
c/w Timber Capping
(General View)
100min
150
Min
1740 2440
150
min.
100 min.
5
Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN
Table 8.
Table 9.
AB
C
Fig. 5.
Roof Opening and Curb Dimensions Fig. 6.
NOTE:
The above Builders Work Details are for guidance only.
Fixing Details for larger (‘D’ size) units (Fig. 7)
Fig. 8a. Fig. 8b.

Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN
Electrical Installation
Quietwin belt drive units may be specified with either Mains
control(C) or Microsave control(M). Units are available for
single or three phase connection.
The location of the control system and supply wiring
connections is shown in figure 9a-9d below.
Supply
3 Phase
L1, L2, L3, N, E.
4 Core Low Voltage
cable connects to
terminals
BL RD BK Y.
Microsave
User Control
MT-A, MT-M
MT-ATC, MT-MTC
3 Phase Belt Drive QT unit with
Microsave (M) Control
Figure 9c
Supply
3 Phase
L1, L2, L3, N, E.
Mains
Control
MT-A, MT-M
230v 4 core
+Earth cable to
L1, L2, N, E, H.
in control box
230v
1 Phase
to power control
230v from
fan to power control
3 Phase Belt Drive QT unit
with Mains (C) Control
Either method
may be used to
power the control
Figure 9d
Supply 230V 1 Phase
to terminals E, N, L.
in control module
4 Core Low voltage cable
to terminals BL, RD, BK, Y.
in control module
Microsave
User Control
MT-A, MT-M
MT-ATC, MT-MTC
1 Phase Belt Drive QT unit with
Microsave (M) Control
Figure 9a
Supply 230V 1 Phase
to terminals E, N, L.
in control module
4 Core and Earth cable
to terminals L1, L2, N, E, H
in control module
1 Phase Belt Drive QT unit
with Mains (C) Control
Mains
Control
MT-A, MT-M
230v 1 Phase supply
to power control
Figure 9b
6
3 YEAR WARRANTY
The three year warranty starts from the date of delivery and
includes parts and labour for the first year.
The labour element is subject to full, free and safe access to the
equipment as recommended by the CDM regulations.
The remaining two years covers replacement parts only.
NOTE:
Installation & Maintenance of the equipment must be as
directed in the instructions provided with the unit.
Service
As a manufacturer NuAire can provide you with factory trained
Service Engineers.
Our Engineers are supported by a comprehensive range of spare
parts 'off the shelf'.
If you are an industrial or commercial user, you may be interest-
ed in details of NuAire's regular maintenance Service Contracts.
This is a worthwhile service that helps you get the most from our
products.
Our Service Department will be happy to give you more infor-
mation.
Please telephone: [phone]
Controls Application Service (CAS)
A team of Engineers and technicians is available to provide pre
and post order support.
We are on hand to provide help and advice from the most basic
use of any NuAire equipment to the more complex applications,
maximising on the versatility of our SMART and NetLink
control products.
Tel: [phone] Fax: [phone]
Technical or commercial considerations may,
from time to time, make it necessary to alter the
design, performance and dimensions of
equipment and the right is reserved to make
such changes without prior notice.

Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN
7
Control Options
Twinfan Control ‘Option 1’ Microsave ‘M’
Mains Supply and
Sensor(s) connected
to Control Module
inside fan.
User control
S.E.L.V. Low Voltage
Communication Cable
(see note 2)
Notes:
1. Only one Microsave User Control
can be connected to
each Microsave
(M) ‘Quietwin’.
2. Terminals are provided within the
Microsave Twinfan
Control Box for
the following:-
• BMS (Building Management
System) override control
(on/off and
system status).
.
3. Note that when a Microsave controlled unit is
supplied , the User Control is included inside the
fan unit for delivery to site. Take care not to misplace
the item before installation.
Wiring Connections
Supply 230V 1 Phase
to terminals E, N, L.
in control module
4 Core Low voltage cable
to terminals BL, RD, BK, Y.
in control module
Microsave
User Control
MT-A, MT-M
MT-ATC, MT-MTC
1 Phase Belt Drive QT unit with
Microsave (M) Control
Code Description
MT-A Auto duty sharing
MT-M Manual duty sharing
MT-ATC Auto duty sharing with timeclock
MT-MTC Manual duty sharing with timeclock
Microsave User Control Options
NOTE
See relevant Installation & Maintenance
instructions for your chosen NuAire Control.
Microsave (M) Twinfan Control: Leaflet No: 670915
Copies are available from the NuAire Technical Library
(01222 858231)

N L L SL L FL L1 L2 N H BL RD BK Y RUN FAULT
Volt Free
Contacts
Rated 230v 5A
(for run indication
if required)
230v
Switched Live
Connection
(twinfan operates
when live, remove
link when used)
Volt Free
Contacts
Rated 230v 5A
(for fail indication
if required)
BL RD BK Y
N U V W
CONTROL MODULE IN FAN
Three phase QUIETWIN with MICROSAVE control
Link Link
400v 3 phase supply
MT-AVI
connection *
NET
* MT-AVI - Audible / Visual Indicator
MICROSAVE USER CONTROL
Low voltage
Communications
Cable
N L L SL L FL L1 L2 N H BL RD BK Y RUN FAULT
Low voltage
Communications
Cable
Not used in this option
MT-AVI
connection *
BL RD BK Y
MICROSAVE USER CONTROL
CONTROL MODULE IN FAN
Single phase QUIETWIN with MICROSAVE control
Link Link
230v 1 phase
supply
Connection
for speed
control
(Link must be
removed when
using a speed
control)
1 phase fans
only
NET
* MT-AVI - Audible / Visual Indicator
230v
Switched Live
Connection
(twinfan operates
when live, remove
link when used) Volt Free
Contacts
Rated 230v 5A
(for run indication
if required)
Volt Free
Contacts
Rated 230v 5A
(for fail indication
if required)
8
Control Options
Twinfan Control ‘Option 1’ Microsave ‘M’ continued.
1 Phase Fan
3 Phase Fan
Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN

Installation and Maintenance QUIETWIN QTR BELTDRIVETWINFAN
9
Control Options
Twinfan Control ‘Option 2’ Mains ‘C’
230v supply (see note 2)
(see note 3).
Four core & earth
230v cable connection
required.
Mains Controller
Notes:
1. Only one Mains User Control can be connected to each
Mains (C) ‘Quietwin’.
2. Mains power can be connected to the Mains Control or
the ‘Quietwin’.
3.Terminals are provided within theMains Control for the
following:-
• BMS (Building Management System) override control
(on/off and system status). Code Description
CT-A Auto duty sharing
CT-M Manual duty sharing
Mains Control Options
NOTE
See relevant Installation & Maintenance
instructions for your chosen NuAire Control.
Mains (C) Twinfan Control. Leaflet No: 670912
Copies are available from the NuAire Technical
Library (01222 858231)
Supply 230V 1 Phase
to terminals E, N, L.
in control module
4 Core and Earth cable
to terminals L1, L2, N, E, H
in control module
1 Phase Belt Drive QT unit
with Mains (C) Control
Mains
Control
MT-A, MT-M
230v 1 Phase supply
to power control
Power
Fail Fail
Duty
Share
Fan 2Fan 1

Control Options
Twinfan Control ‘Option 2’ Mains ‘C’ continued.
N L L SL L FL L1 L2 N H BL RD BK Y RUN FAULT
Connection
for speed
control
(Link must be
removed when
using a speed
control)
1 phase fans
only
L1 L2 N H
QUIETWIN FAN Single phase
230v MAINS CONTROL
230v 1 phase
supply
Link Link NET
CT-AVI
- Audible / Visual
Indicator
connection
230v
Switched Live
Connection
(twinfan operates
when live, remove
link when used)
Volt Free
Contacts
Rated 230v 5A
(for run indication
if required)
Volt Free
Contacts
Rated 230v 5A
(for fail indication
if required)
4 core
& Earth
Cable
CONNECTION BOX IN FAN
L1 L2 N E H U V W E
400v 3 phase supply
E N L L SL L FL L1 L2 N E H BL RD BK Y RUN FAULT
230v MAINS CONTROL
230v 1 phase
supply
Link Link NET
CT-AVI
- Audible / Visual
Indicator
connection
QUIETWIN FAN Three phase
230v
Switched Live
Connection
(twinfan operates
when live, remove
link when used) Volt Free
Contacts
Rated 230v 5A
(for run indication
if required)
Volt Free
Contacts
Rated 230v 5A
(for fail indication
if required)
4 core
& Earth
Cable
Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN
10
1 Phase Fan
3 Phase Fan
IMPORTANT NOTE:
(THREE PHASE TWINFANS)
A link plug is factory fitted to match
this Twinfan Control to single phase
twinfans
When using the Twinfan Control with
a three phase twinfan you must first
remove this link plug which is located
on the circuit board.
L FL L1 L2 N H BL RD BK Y RUN FAULT
D FAN FAN UNIT ICP RR RF
LIVE
Remove this plug to allow
control of 3 phase fans

11
Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN
Maintenance General
CASE SIZE ‘A’ ‘B’ ‘C’ UNITS
ISOLATION
BEFORE COMMENCING WORK MAKE SURE THAT
THE UNIT AND NUAIRE CONTROL,
IF FITTED, ARE ELECTRICALLY ISOLATED FROM
THE MAINS SUPPLY.
Access to the unit internals is gained by removing the top cover(s)
Isolate the unit and inspect the following items three months after
commissioning and then once per year.
Maintenance Intervals
The first maintenance should be carried out three months after
commissioning and thereafter at twelve monthly intervals.
These intervals may need to be shortened if the unit is operating
in adverse environmental conditions, or in heavily polluted air.
Motors
Brush away any dust or dirt from the motor housings and
ensure that the motor vents are unblocked.
Bearings
Lubrication is unnecessary as the motors are fitted with sealed
for life bearings.
Impellers
Remove any dust and check that the impellers are securely fixed
to the motor shafts. Take care not to disturb any balance
weights fitted. Check sealed for life bearings for excessive wear.
Shutter Assembly
Remove any dust and check that the shutters operate freely.
and that they seal the appropriate fan outlet effectively. (Fig 10)
Fig. 10. Quietwin shutter detail.
Anti-vibration mountings
Four resilient mountings support each fan tray. Check that the
mountings are secure and in good condition.
Aiflow Flapswitch for Auto changeover
Check the flag switches operate freely by locating the spindle
and flap (through the blower outlet aperture) and carefully
moving the flap. A click will be heard when the switch operates.
See fig. 11.
NOTE: Do not bend the flaps.
Deflection
Fig.12 Adjusting the drive belt (A, B, C units).
Fig.11 Auto change over flap switch.
Changing a drive belt.
To replace a belt, remove the two bolts from the motor
mounting furthest from the fan and slacken the remaining two
bolts. Lift the motor plate and remove the belt. Replacing the
belt is the reverse of this procedure.
Adjusting drive belt tension.
To check the correct tension of a drive belt, apply a force at right
angles to the centre of the belt span sufficient to deflect the belt
16mm for every metre of span length (see fig. 12). The force
required to deflect the ‘V’ belt should be from 0.5kg to 0.8kg.
The tension of the belt should be checked after 24hrs of
continuous running and adjusted as necessary.
General Cleaning and Inspection
Clean and inspect the exterior of the fan unit and associated
controls etc.
Remove the access panel from the fan unit. Inspect and, if nec-
essary, clean the fan and motor assemblies and the interior of the
case. If the unit is heavily soiled it may be more convenient to
remove the fan / motor assemblies.
If NuAire controls and or remote indicators are fitted, remove
the covers and carefully clean out the interiors as necessary.
Check for damage.
Check security of components. Refit the access covers.
General
1. Check that all fixings are tight.
2. Check sealing strips around the fan outlets are tight up
against the bulkhead.
3. Check that duct connections are not leaking.
Flap and spindle
Micro switch

12
Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN
Maintenance (continued).
CASE SIZE ‘D’ UNITS
ISOLATION
BEFORE COMMENCING WORK MAKE SURE
THAT THE UNIT AND NUAIRE CONTROL,
IF FITTED, ARE ELECTRICALLY ISOLATED FROM
THE MAINS SUPPLY.
Access to the unit internals is gained by removing the top
cover(s) Isolate the unit and inspect the following items three
months after commissioning and then once per year.
Maintenance Intervals
The first maintenance should be carried out three months
after commissioning and thereafter at twelve monthly inter-
vals. These intervals may need to be shortened if the unit is
operating in adverse environmental conditions, or in heavily
polluted air.
Motors
Brush away any dust or dirt from the motor housings and
ensure that the motor vents are unblocked.
Bearings
Lubrication is unnecessary as the motors are fitted with sealed
for life bearings.
Impellers
Remove any dust and check that the impellers are securely
fixed to the motor shafts. Take care not to disturb any balance
weights fitted. Check sealed for life bearings for excessive
wear.
Shutter Assembly
Remove any dust and check that the shutters operate freely.
and that they seal the appropriate fan outlet effectively.
Fig. 13. Quietwin shutter detail.
Anti Vibration motor plate mountings
Each motor plate is supported on ten individual resilient
mountings. Check that all the mountings are secure and in
good condition. See fig 13.
Aiflow Flapswitch for Auto changeover
Check the flag switches operate freely by locating the spindle
and flap (through the blower outlet aperture) and carefully
moving the flap. A click will be heard when the switch oper-
ates. See fig. 14.
NOTE: Do not bend the flaps.
Fig. 14 Auto changeover flap switch
Fig. 15 Tensioning the drive belts on size ‘D’ units.
Belts
All belt drive units incorporate belt tensioning devices. To
adjust the belt tension, slacken the pinch bolt on the sides of
the motor plate. Turn the adjusting bolt clockwise to tighten
the belt and counter clockwise to loosen it.
The drive should be tensioned until a slight bow appears in
the slack side of the ‘V’ belt when running under load. To
check for correct tension, proceed as follows.
1. Measure the span length (See fig. 15).
2. At the centre of the span, apply a force at right angles to the
belt sufficient to deflect one belt 16mm for every metre of
span length (see fig. 7). The force required to deflect the ‘V’
belt should be from 0.5kg to 0.8kg.
General Cleaning and Inspection
Clean and inspect the exterior of the fan unit and associated
controls etc.
Remove the access panel from the fan unit. Inspect and, if
necessary, clean the fan and motor assemblies and the interior
of the case. If the unit is heavily soiled it may be more conve-
nient to remove the fan / motor assemblies.
If NuAire controls and or remote indicators are fitted, remove
the covers and carefully clean out the interiors as necessary.
Check for damage.
Check security of components. Refit the access covers.
General
1. Check that all fixings are tight.
2. Check sealing strips around the fan outlets are tight up
against the bulkhead.
3. Check that duct connections are not leaking.
Flap and spindle
Micro switch

Replacement of Parts
The only item of the fan units unit likely to require replace-
ment are the fan/motor assemblies due to a failed motor or
damaged impeller. In either eventuality the complete fan/
motor assembly must be removed from the unit case.
NOTE:
BEFORE COMMENCING WORK, ELECTRICALLY
ISOLATE THE FAN UNIT AND / OR THE
ASSOCIATED NUAIRE CONTROL, IF FITTED,
FROM THE MAINS SUPPLY.
Remove the access cover. Disconnect the incoming wiring
from the connection box (located on the fan scroll) on the
particular fan/motor assembly to be removed. Support the
weight of the fan/motor assembly and remove the mounting
screws and washers. Lift the assembly out of the case.
After replacing the faulty item, refit the fan/motor assembly
and reconnect the incoming wiring to the fan mounted con-
nection box. Replace the access cover.
Unit
code Motor.
Unit
code Motor.
QTR 1
QTR 2
QTR 3
QTR 3*1
QTR 4
QTR 4*1
QTR 5
QTR 5*1
QTR 6
QTR 6*1
QTR 7
QTR 7*1
QTR 8
QTR 8*1
QTR 9
QTR 9*1
QTR 10
QTR 10*1
QTR 11
QTR 11*1
QTR 12
QTR 13
QTR 13*1
QTR 14
QTR 15
QTR 16
QTR 17
QTR 17*1
QTR 18
QTR 19
QTR 20
QTR 20*1
QTR 21
QTR 22
QTR 23
QTR
Case size A
530376
530376
530320
530376
530320
530375
530376
530320
530376
530376
530320
530321
530322
Unit
code Motor.
QTR 1
QTR 2
QTR 3
QTR 4
QTR 5
QTR 6
QTR 7
QTR 8
QTR 9
QTR 10
QTR 11
QTR 12
QTR 13
QTR
Case size B
SPARES
530371
530371
530372
530364
530373
530368
530372
530367
530373
530368
530372
530367
530373
530368
530374
530369
530373
530368
530374
530369
530375
530373
530368
530374
530375
530376
530374
530369
530375
530376
530374
530369
530375
530376
530320
Installation and Maintenance QUIETWIN QTRBELTDRIVETWINFAN
13
530321
530321
530322
530320
530321
530322
530323
530321
530322
530323
530324
530321
530322
530323
530324
530322
530323
530324
530322
530323
530324
QTR 1
QTR 2
QTR 3
QTR 4
QTR 5
QTR 6
QTR 7
QTR 8
QTR 9
QTR 10
QTR 11
QTR 12
QTR 13
QTR 14
QTR 15
QTR 16
QTR 17
QTR 18
QTR 19
QTR 20
QTR 21
QTR
Case size C
QTR Quietwins
Blower Assemblies
Case Size Part No.
A 770572
B 770573
C 770574
D 770988
Schedule of Parts
When ordering spares please quote the serial number of the
unit together with the part number if. If the part number is not
known please give a full description of the part required.
The serial number will be found on the identification plate
attached to the unit casing.
530320
530321
530322
530323
530324
530325
530320
530321
530322
530323
530324
530325
531110
530322
530323
530324
530325
531110
531109
530323
530324
530325
531110
531109
531108
530324
530325
531110
531109
531108
531107
530325
531110
530109
531108
531107
531106
Unit
code Motor.
QTR 1
QTR 2
QTR 3
QTR 4
QTR 5
QTR 6
QTR 7
QTR 8
QTR 9
QTR 10
QTR 11
QTR 12
QTR 13
QTR 14
QTR 15
QTR 16
QTR 17
QTR 18
QTR 19
QTR 20
QTR 21
QTR 22
QTR 23
QTR 24
QTR 25
QTR 26
QTR 27
QTR 28
QTR 29
QTR 30
QTR 31
QTR 32
QTR 33
QTR 34
QTR 35
QTR 36
QTR 37
QTR
Case size D
Table 10. Table 11.
Table 12. Table 13.
Table 14.

We declare that the machine named below
conforms to the requirements of EC Council Directives
relating to Electromagnetic Compatibility and
Safety of Electrical Equipment.
Designation of machinery :- QUIETWIN BELT DRIVE
Machinery Types :- QTR
Relevant EC Council Directives :- 89/336/EEC, 92/31/EEC (EMC)
73/23/EEC, 93/68/EEC (Low Voltage Directive)
Applied Harmonised Standards :- E50081-1, EN50082-1, EN60204-1
EN60335-2-80
Basis of Self Attestation :- Quality Assurance to BS EN ISO 9001
BSI Registered Firm Certificate No. FM 149
Signature of manufacture representatives :-
Name: Position: Date:
1) C. Biggs Technical Director 2. 10. 98
2) M. Fussell Manufacturing Director 2. 10. 98
NuAire Limited,
Western Industrial Estate,
Caerphilly, Mid Glamorgan,
CF83 1XH. United Kingdom.
Telephone: [phone]
Fax: [phone]
Email: info @ nuaire. co. uk
OCTOBER 1998
DECLARATION
OF CONFORMITY
14

We declare that the machinery named below is intended to be assembled with other
components to constitute a system of machinery.
The machinery shall not be put into service until the system has been declared to be
in conformity with the provisions of the EC Council Machinery Directive.
Designation of machinery :- QUIETWIN BELT DRIVE
Machinery Types :- QTR
Relevant EC Council Directives :- 98/37/EC (Machinery Directive)
93/44/EEC (Amendment to the Machinery Directive)
Applied Harmonised Standards :- EN292-1, EN292-2, EN294, EN29001
Applied National Standards :- BS848 Parts One, Two and Five
Signature of manufacture representatives :-
Name: Position: Date:
1) C. Biggs Technical Director 3.10.98
2) M. Fussell Manufacturing Director 3.10.98
NuAire Limited,
Western Industrial Estate,
Caerphilly, Mid Glamorgan,
CF8 1XH. United Kingdom.
Telephone: [phone]
Fax: [phone]
Email: info @ nuaire. co. uk
OCTOBER 1998
DECLARATION OF INCORPORATION
& INFORMATION FOR SAFE
INSTALLATION, OPERATION & MAINTENANCE
15

INFORMATION FOR SAFE INSTALLATION, OPERATION AND
MAINTENANCE OF NUAIRE VENTILATION EQUIPMENT
To comply with EC Council Directives 89/392/EEC Machinery Directive
& 93/44/EEC Amendment to the Machinery Directive.
To be read in conjunction with the relevant Product Documentation (see 2.1)
1.0 GENERAL
1.1 The equipment referred to in this Declaration of Incorporation is supplied by NuAire to be assembled into a ventilation
system which may or may not include additional components.
The entire system must be considered for safety purposes and it is the responsibility of the installer to ensure that all of the
equipment is installed in compliance with the manufacturers recommendations and with due regard to current legislation and
codes of practice.
2.0 INFORMATION SUPPLIED WITH THE EQUIPMENT
2.1 Each item of equipment is supplied with a set of documentation which provides the information required for the safe installation
and maintenance of the equipment. This may be in the form of a Data sheet and/or Installation and Maintenance instruction.
2.2 Each unit has a rating plate attached to its outer casing. The rating plate provides essential data relating to the equipment such as
serial number, unit code and electrical data. Any further data that may be required will be found in the documentation. If any
item is unclear or more information is required, please contact NuAire.
2.3 Where warning labels or notices are attached to the unit the instructions given must be adhered to.
3.0 TRANSPORTATION, HANDLING AND STORAGE
3.1 Care must be taken at all times to prevent damage to the equipment. Note in particular that shock to the unit may result in the
balance of the impeller being affected.
3.2 When handling the equipment, care should be taken with corners and edges and that the weight distribution within the unit is
considered. Lifting gear such as slings or ropes must be arranged so as not to bear on the casing.
3.3 Equipment stored on site prior to installation should be protected from the weather and steps taken to prevent ingress of
contaminants.
4.0 OPERATIONAL LIMITS
4.1 It is important that the specified operational limits for the equipment are adhered to e.g. operational air temperature, air borne
contaminants and unit orientation.
4.2 Where installation accessories are supplied with the specified equipment eg. wall mounting brackets. They are to be used to
support the equipment only. Other system components must have separate provision for support.
4.3 Flanges and connection spigots are provided for the purpose of joining to ductwork systems. They must not be used to support
the ductwork.
5.0 INSTALLATION REQUIREMENTS
In addition to the particular requirements given for the individual product, the following general requirements should be noted.
5.1 Where access to any part of equipment which moves, or can become electrically live are not prevented by the equipment
panels or by fixed installation detail (eg ducting), then guarding to the appropriate standard must be fitted.
5.2 The electrical installation of the equipment must comply with the requirements of the relevant local electrical safety regulations.
6.0 COMMISSIONING REQUIREMENTS
6.1 General pre-commissioning checks relevant to safe operation consist of the following -
Ensure that no foreign bodies are present within the fan or casing
Check electrical safety. e.g. Insulation and earthing.
Check guarding of system.
Check operation of Isolators/Controls.
Check fastenings for security.
6.2 Other commissioning requirements are given in the relevant product documentation.
7.0 OPERATIONAL REQUIREMENTS
7.1 Equipment access panels must be in place at all times during operation of the unit, and must be secured with the original fastenings.
7.2 If failure of the equipment occurs or is suspected then it should be taken out of service until a competent person can effect repair
or examination. (Note that certain ranges of equipment are designed to detect and compensate for fan failure).
8.0 MAINTENANCE REQUIREMENTS
8.1 Specific maintenance requirements are given in the relevant product documentation.
8.2 It is important that the correct tools are used for the various tasks required.
8.3 If the access panels are to be removed for any reason the electrical supply to the unit must be isolated.
8.4 A minium period of two minutes should be allowed after electrical disconnection before access panels are removed. This will allow
the impeller to come to rest.
NB: Care should still be taken however since airflow generated at some other point in the system can cause the impeller to “windmill” even when
power is not present.
8.5 Care should be taken when removing and storing access panels in windy conditions.
16 GP 182