Mounting; Pipework Connections; Duct Connections - Lennox Quantum Waterside LQWFC 150 Installation Operating & Maintenance Manual

MOUNTING / CONNECTIONS
Thank you for choosing the Lennox Quantum Waterside
Fan Coil Unit. Please read the following information
carefully prior to installation. These instructions should
be kept in a safe place for future reference.
WARNING:
ISOLATE FROM THE ELECTRICAL SUPPLY
BEFORE COMMENCING WORK.
These units can be installed virtually as delivered. They
are intended for fitting behind a suspended ceiling or a
similar ceiling void and have circular spigots for
connecting to ducting. Similarly, they can have a fresh air
spigot fitted when specified.

MOUNTING

In all cases, the units are fixed to the mounting face by
means of four slots in the end flanges. Down rods, 10mm
in diameter, should be used to support units
1. Unistrut should be mounted to the slab (see
dimensional data) and four 10mm down rods fixed to
the unistrut.
2. The down rods should have two nuts and two washers
to lock the unit in position. The unit can then be lifted
into location, hooking the slots (in the top panel) over
the washers. The nuts must then be securely
tightened.
3. Check to ensure the unit is level and adjust if
necessary.
4. Check that water runs into the waste from the drain
tray, by pouring water into it.
NOTE: To allow for Service Clearances it is recommended
that a minimum space of 50mm is provided from top of
the unit to underside of slab.
Sufficient space should be provided to allow for clear and
safe access to the control panel.
LENN X
R

PIPEWORK CONNECTIONS

1. Water flow and return connection
Plain pipe connection tails are all to BS 2871, Part 1:
1971 and are suitable for brazed or compression fittings.
Connection sizes are 15mm or 22mm outside diameter
on the cooling coil and 15mm on the heating coil. Actual
final connection pipesizes will vary depending on valve
configuration where fitted.
2. Condensate Tray Connection
An end facing 22mm outside diameter copper
condensate drain connection tube to BS 2871, Part 1:
1971 is fitted as standard to the condensate tray on all
units.
3. Air Vents and Drains
Brass air vent and drain tapping points are fitted as
standard to all coils. These are positioned at the top and
bottom of the header tubes.

DUCT CONNECTIONS

1. Discharge Air Side
An integral discharge plenum is fitted as standard
complete with 197mm or 247mm outside diameter
circular spigots. These are to accept standard diameter
flexible ducting. Blanking caps are available to order.
2. Inlet Air Side
When specified, units will be fitted with an Air Inlet
Plenum, this will have the same number, size and
position of circular spigots as on the discharge air side.
Blanking caps are available subject to order.
3. Fresh Air Spigot
The fresh air spigot is available in a size of 100mm
diameter.
4. Condensate pump
Condensate pump kits are available as an optional
factory fitted option.
electrical wiring details.
5. Electrical heating element
LQWFC150 2KW
LQWFC260 2KW
LQWFC440 4KW
Refer to diagrams indicating electrical wiring details.
3
Refer to diagrams indicating
LQWFC190 2KW
LQWFC330 4KW