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: 01222 885911
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 9m
3
/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 40
o
C.
* 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.
