Eaton-Williams Qualitair Technical Manual & Installation Procedures - page 3
PM CHASSIS UNIT MANUAL
:E\Manuals\Others\Qualitair\QPM\LG3298L/22QPMChassisUnit
INTRODUCTION
The QPM Chassis Unit has been designed as
a direct replacement inner chassis for Series
16 SC Nelson / Aire Units, as manufactured
by AAF Ltd.
The replacement chassis contains the
compressor evaporator and condenser fans
and evaporator and condenser coils,
electrical controls and fresh air damper and
is designed to fit within the original outer
unit casing, comprising of outdoor louvre,
cabinet, front panel and grille, main
recirculation filter and LPHW coil and
associated control valve.
The unit is available in two forms:
Part N°
LN3298L1
Basic
Unit
Part N°
LN3298L2
Basic
Unit plus auxiliary electrical supply
The basic unit contains electro-mechanical
controls for temperature control and four
selectable recirculation fan options. The unit
also has an electro mechanical operated
fresh air damper. The operation of these
controls is described elsewhere in this
manual.
The auxiliary electrical supply unit has an
additional power supply connection to allow
the unit to run on reduced functionality from
a standby backup supply. Exact details are
described elsewhere in this manual.
SITE REQUIREMENTS
The replacement chassis unit will require the
originally installed AAF Ltd outer casing and
LPHW coil, valve and internal external grilles
to have been installed to the manufacturer’s
original requirements, be in good working
order and be to the minimum standard as
seen and witnessed at site approval meeting
held on / /98
Colin Symmonds
W S Atkins
D
Mortimer
Qualitair
The replacement chassis unit will be fitted
with the following electrical connections to
which suitable matching connections will
have to be provided.
Unit Electrica
l Supply
Connection
(1m Long Flying
Lead)
LN3298L1
Mains
Incoming
Heater
Output
240v 1Ph
50Hz
(10A)
240v 1Ph
50Hz
3-Pin Plug (MK Type
P153)
3-Pin Inline Socket (MK
Type LCP103S)
LN3298L2 As above, with the addition of:
Auxiliary
Standby
Supply
240V 1Ph
50Hz (5A)
3-Pin Plug (MK Type
P53)
INSTALLATION
a)
Isolate electrical supply to existing
unit.
b)
Remove power supply connectors.
c)
Remove existing inner chassis.
d)
Replace if necessary electrical
connections for main supply,
auxiliary supply (option) and heater.
e)
Remove replacement unit from
packaging.
f)
Check unit is undamaged and is
suitable for site electrical supply
(data plate location – adjacent to
electrical chassis).
g)
Fit replacement unit into existing
casing; ensure the rear lip is located
correctly over rear of casing.
h)
Reconnect power supply connectors.
i)
Re-instate electrical supply.
j)
Check functions of unit.
(See details elsewhere in this manual).
NOTE:
Condensate formed during cooling mode
is removed from the indoor section and
re-evaporated and expelled to
atmosphere within the outdoor section.
Therefore it is important that the unit is
level in all directions to prevent leaks.