Lennox Quantum Waterside LQWFC 150 User manual

CONTENTS
1
Page
Quantum Waterside Fan Coil Specification 2
Mounting 3
Pipework Connections 3
Duct Connections 3
Electrical Connections 4
Controls 4
Fan Speed Settings 5
Periodic Maintenance 6
Fancoil Maintenance 7
Coil Water Content 8
Weights 8
Minimum No. Spigots 8
Coil Connections 8
Wiring Diagram 9
Fault Finding 10
Spares List 11
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EUROVENT
CERTIFIED PERFORMANCE
Manufacturer reserves the right to change any product specifications without notice.

QUANTUM WATERSIDE FAN COIL SPECIFICATION
2
Casings
The casings shall consist of durable 1.2mm
galvanised sheet steel reinforced where
required to form a rigid structure.
Discharged Plenum
The discharge plenum shall be lined
with class 0 acoustic insulation. The plenum
shall be provided with spigots for duct
connection.
Drip Tray
The drip tray shall be manufactured such that
when the unit is mounted level there shall be a
positive fall for the condensate water to the
drain connection from all areas of the drip tray.
There shall be no areas where water can col-
lect in pools. The drip tray shall be
insulated with 3mm closed cell foam to
Class 0 specification.
Fans
Double inlet double width fans shall be used
driven by a motor using cradle type resilient
mountings. The fans impellers shall be at least
160mm diameter and of ‘Tablock’ construction
to ensure good performance and low noise.
Each
balanced.
impeller shall be statically & dynamically
Motors
Motors shall be single speed permanent split
capacitor type. The motors used shall comply
with BS 5000 Part11 1973 (revised 1989).
Speed control shall be achieved by applying a
variable voltage to the motor winding. Motors
are to have maintenance free sealed for life
bearings and built in thermal overload protec -
tion.
Insulation
Dual function thermal and acoustic
insulation shall be used and shall be to
Class 0 specification.
Heat Exchangers
All heat exchangers shall be tested at a mini-
mum of 25 bar pressure. The coils shall be
manufactured using solid drawn copper tubes
and aluminium fins. Each coil shall be fitted
with an air vent.
Filters
Standard filters shall be of the washable type.
Theyshall have a performance classification
of G2 in accordance with EN779 (EU2) and a
flame resistance to DIN 53438:Class F1.
Connections
All are to be to BS 2871 Part 1:1971 and suit-
able for brazed or compression fittings. Coil
connections shall be at 40mm centres to
enable easy fitment of standard water control
valves.
Controls
All units shall be fitted with illuminated ON/Off
switch, three speed selector switch and include
+5v / +10v trimmer switches to aid
commissioning and be complete with 24 Volt
AC transformer output to drive controllers and
actuators.
Packaging
Units shall be supplied with suitable packaging
to prevent damage and dust contamination.
Units shall be clearly marked with the model
identification and site reference and supplied
with installation instructions.
Certification
Units shall be supplied with a CE label desig-
nating that they comply with CE requirements
for safety.

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.
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. Refer to diagrams indicating
electrical wiring details.
5. Electrical heating element
LQWFC150 2KW LQWFC190 2KW
LQWFC260 2KW LQWFC330 4KW
LQWFC440 4KW
Refer to diagrams indicating electrical wiring details.
MOUNTING / CONNECTIONS
3
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ELECTRICAL CONNECTIONS
ISOLATE ELECTRICAL SUPPLY BEFORE
ATTEMPTING SERVICE WORK.
A 230V, 50Hz, single phase supply is required. Wiring
must be installed by a qualified electrician and conform
to current local and national regulations.
1. Wire mains to unit via a double pole isolating switch,
fused to IEE regulation. Refer to diagrams indicating
electrical wiring details.
2. The electrical connection is via a 2m flying lead with
factory fitted connector into socket on control box
where an electric heater is NOT fitted. If an electric
heater is fitted, to connect mains supply to unit,
slacken off the screw holding the control box front
cover. Carefully pivot the cover to support it, making
sure the wires connecting the cover to the unit are not
strained. Connect the mains lead via grommet hole
in the side panel to the LIVE, NEUTRAL and EARTH
positions on the 12-way terminal block. Replace
cover and tighten screw.
3. If a Condensate Lift Pump is specified, this w i l l b e
pre-wired back to the control box, but the pump
assembly will be taped to the unit and must be fixed to
the end of the drip tray before installing the unit, using
the screws supplied.
4. The fan motors are of the permanent split capacitor
type and have a capacitor fixed to the outside of the
motor. All motors have thermal overload protection
as standard. Access to the fan tray is via removable
panels on the bottom face of the unit.
CONTROLS
All units are fitted as standard with an ON/OFF switch and
a FAN SPEED selector switch for three speeds.
When specified, the water control valves will have a
controller that will be fitted to the exterior of the control
box.
These are all fitted into the control box and pre-wired.
1. Fan Speed
Out of 6 speeds available, SL (Super Low), EL(Extra Low),
L(Low), ML(Med/Low), M(Med), and H(High), the fan
speed selector switch will be wired for three speeds.
Speed adjustment and fine tuning is achieved by
following the instructions indicated on the label that is
positioned on the underside of the unit, adjacent to the
control box.
Each model size has its specific settings, examples as
detailed on page 5 of this document.
An example of adjusting the speed setting is described
below:-
E.g.: If unit is selected for Medium/Low (ML) speed,
then the speed selector switch is set at position II and
other positions L and M, as below:
Position I = L (Low Speed)
Position II = ML(Med/LowSpeed)
Position III = M (Medium Speed)
If selected speed is EL then this would be Position II with
SL and L other positions. If selected speed is H then this
would be posiition III with M and ML other positions.
ELECTRICAL CONNECTIONS / CONTROLS
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4

FAN SPEED SETTINGS
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III
II
I
I I I
O O O
ON +5v +10v 3 spd
FAN SPEED SETTINGS
To achieve the design speed use
a combination of main tappings
on the transformer and switch
positions on the outside of the
control box.
5
Main tapping Fan speed
switches
Output Volts
330
W Y R +5
V
+10
V
@design
speed
EL 120 150 I00120
L120 150 I01130
ML 120 150 II 1 0 140
M135 165 II 0 0 150
H150 180 II 1 0 170
Main tapping Fan speed
switches
Output Volts
440
WYR +5
V
+10
V
@design
speed
EL 120 150 I00120
L120150 I01130
ML 120 150 II 1 0 140
M135 165 II 0 0 150
H165 195 II 0 0 180
Main tapping Fan speed
switches
Output Volts
480
W Y R +5
V
+10
V
@design
speed
EL 120 150 I01130
L120 150 II 0 1 145
ML 135 165II 0 1 160
M150 180 II 0 1 175
H165 195 III 0 0 195
Main tapping Fan speed
switches Output Volts
150
WYR +5
V
+10
V
@design
speed
EL 120 150 I00120
L120 150 I01130
ML 135 165 II 0 0 150
M150 180 II 1 0 170
H165 195 III 1 0 200
Main tapping Fan speed
switches
Output Volts
190
WYR +5
V
+10
V
@design
speed
EL 120 150 I00120
L 120 150 I01130
ML 120 150 II 1 0 140
M135 165 II 0 0 150
H135 165 III 1 0 170
Main tapping Fan speed
switches
Output Volts
260
W Y R +5
V
+10
V
@design
speed
SL 120 150 I00120
EL 120 150 I01130
L120 150 II 1 0 140
ML 135 165 II 0 0 150
M150 180 II 1 0 170
H165 195 III 1 1 200
135
135
135
150
165
135
135
135
150
165
180
135
135
135
150
150
135
135
150
165
180
135
135
135
150
180
135
135
150
165
180
Switch
Switch
Switch
Switch
Switch
Switch

PERIODIC MAINTENANCE PROCEDURE
The following routine maintenance operations should be
carried out twice a year or at such shorter intervals as
may be dictated by climatic conditions or cleanliness of
conditioned space.
1. Routine Precautions
SWITCH OFF POWER SUPPLY AT THE MAINS OUTLET
BEFORE COMMENCING ANY WORK ON THE
EQUIPMENT.
DO NOT OPERATE FAN FOR LONG PERIODS (OVER 2
HOURS) UNDER FREE AIR CONDITIONS. I.E WITHOUT
DUCTWORK CONNECTED.
DO NOT USE STEAM JET OR HIGH PRESSURE HOT
WATER TO CLEAN COIL SURFACES.
2. General
!Thoroughly clean chassis, baseplate, drain tray.
!Clean casing. The unit exterior surfaces should be
inspected monthly and any signs of corrosion or
scratches should be treated immediately.
3. Routine Checks
!Check voltage at supply point with unit running.
4. Condensate Trays
!Check condensate drains are clean and free running.
!Check condensate hose connections are secure
and leak free.
!Clean the condensate tray thoroughly.
!Check and clean condensate pump if fitted.
!Check operation of tray, drains or pump by
introducing water into tray.
5. Controls
!Check all connections for burning or wear. Replace if
necessary.
!Ensure all electrical connections are secure.
!Check functions of controls according to operating
procedures.
6. Fan Motor and Fan
A regular check on the fan/motor assembly is
advisable to ascertain if any overheating of the motor
is occurring and that the fan impeller is free running
and has not sustained any damage.
Check that fans and fan motor are properly
aligned.
Check all securing screws, bolts and nuts are tight.
7. Coil
The coil should be inspected every six months to
ascertain if any foreign matter has accumulated
between the fins and that the coil connections are
free from leaks.
Should the fins become contaminated too frequently,
it is advisable to check that the air filter is functioning
correctly.
Use a soft brush and vacuum cleaner to remove any
dust between fins. Comb fins if required.
DO NOT RUN UNIT WITHOUT FILTER FITTED.
8. Filter
Regular cleaning of return air filter is essential, every
three to six months depending on the working
environment of the unit. Dirty filters will reduce the
air volume handled by the unit, thus adversely
affecting its performance.
Clean the filter using a vacuum cleaner OR remove
the filter from the unit and fully immerse in warm
water with a mild detergent. Rinse in clear water,
allow to dry before replacing.
PERIODIC MAINTENANCE
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7
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FANCOIL MAINTENANCE
RUNNING
CHECK UNIT FUSE
CHECK MAINS SUPPLY
CHECK POWER SUPPLY TO FANS
RESET MCB
CHECK TRANSFORMER
CONTACT
SPARES DEPT
REPLACE
MAX 3 AMP
POOR COOLING/HEATING PERFORMANCE
NOT
CLEAN WITH VAC-
UUM CLEANER
24V AND MAINSOUTPUT
OK, BUT:-
FANCOIL MAINTENANCE
FANCOIL WORKING
CORRECTLY
OK
CONTINUE
NOT WORKING
EXAMINE
IF FITTED CHECK THERMOSTAT SETTING EXAMINE SET POINT
WATERSIDE UNIT AIRSIDE UNIT
CHECK DAMPER MECHANISM
CHECK ACTUATOR
EXAMINE VALVES & ACTU ATORS
EXAMINE W ATER FLOW TEMPERATURE
CHECK CONTROLLER
CHECK MOTOR/CAPACITOR
ADD LINK BETWEEN
TERM 8 & 9. IF FCU
WORKS CONTROL-
LER IS FAULTY
CONTACT
SPARES DEPT
CONTACT
SPARES DEPT
CHECK FILTER FOR BLOCKAGE EXAMINE FILTER WASH OR
VACUUM REPLACE IF NEC,
CONTACT SPARES DEPT.
CHECK COIL FOR BLOCKAGE
CONTACT
SPARES DEPT
CONTACT
SPARES DEPT
CONTACT
SPARES DEPT
CONTACT
SPARES DEPT
CHECK MOTOR
CONTACT
SPARES DEPT
POOR AIRFLOW
OK, BUT:-
Noisy
CHECK IMPELLORS ARE SE-
CURE AND NOT RUBBING ON
SCROLLS.
FANCOIL WORKING
CORRECTLY
FANCOIL WORKING
CORRECTLY
When contacting Spares Dept please specify Unit type, size and Ref number.

MODEL
LQWFC150
LQWFC190
LQWFC260
LQWFC330
LQWFC440
LQWFC480
WEIGHT
kg
MINIMUM No. SPIGOTS COIL CONNECTIONS (mm)
Total CWFront LPHW
34
42
55
70
90
93
2
2
2
3
3
4
1
1
1
2
2
4
15
15
15
22
22
22
15
15
15
15
15
15
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DATA
ELECTRICAL DATA COIL WATER CONTENT
COIL WATER CONTENT
WEIGHTS, MINIMUM No. SPIGOTS, COIL CONNECTIONS
Motor Full Load Start
Power Current Current
W A A
95 0.42 0.53
71 0.32 0.41
56 0.26 0.32
45 0.21 0.25
40 0.18 0.21
117 0.52 0.72
97 0.43 0.55
81 0.36 0.47
70 0.31 0.40
59 0.26 0.34
168 0.75 1.09
133 0.59 0.81
106 0.47 0.63
81 0.36 0.47
70 0.31 0.40
217 0.96 1.23
174 0.77 0.96
138 0.61 0.74
102 0.45 0.61
86 0.38 0.52
244 1.07 1.30
207 0.91 1.10
180 0.79 0.94
153 0.67 0.80
141 0.61 0.74
262 1.16 1.40
244 1.04 1.26
220 0.97 1.17
197 0.87 1.05
155 0.67 0.81
FAN
MODEL SPEED Volts
H200
LQWFC M170
150 ML 150
L130
EL 120
H170
LQWFC M150
190 ML 140
L130
EL 120
H200
LQWFC M170
260 ML 150
L140
EL 130
H170
LQWFC M150
330 ML 140
L130
EL 120
H180
LQWFC M150
440 ML 140
L130
EL 120
H195
LQWFC M175
480 ML 160
L145
EL 130
Water No of
MODEL Temp. rows
Heating NA 1
150/3R Low 3
150/4R Low 4
150/3R High 3
150/4R High 4
Heating NA 1
190/3R Low 3
190/4R Low 4
190/3R High 3
190/4R High 4
Heating NA 1
260/3R Low 3
260/4R Low 4
260/3R High 3
260/4R High 4
Heating NA 1
330/3R Low 3
330/4R Low 4
330/3R High 3
330/4R High 4
Heating NA 1
440/3R Low 3
440/4R Low 4
440/3R High 3
440/4R High 4
Heating NA 1
480/4R High 4
Water
content litres
0.09
1.41
1.88
1.41
1.88
0.12
1.84
2.46
1.84
2.46
0.16
2.39
3.19
2.39
3.19
0.20
3.04
4.06
3.04
4.06
0.27
4.00
5.33
4.00
5.33
0.53
5.33

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WIRING DIAGRAM