Lennox FLATAIR FLCK, Installation, Operation And Maintenance Manual, Page: 17 / 32

16
1.- GENERAL CHARACTERISTICS
1.7.- AVAILABLE OPTIONS
HOT WATER COIL
It is based on a refrigerating coil made of copper tubing with aluminum swirl fins with
water inlet and outlet connections.
It is supplied mounted inside the unit as picture shows.
MAIN SWITCH
The main switch is located on the access panel to the electrical box in the outdoor section in such a way that the unit is
disconnected when the panel is opened.
(Refer to the size diagram on pages 8 to 11 to see the position of the electrical box access panel).
Check to make sure that the main switch is large enough to handle the current for the unit if electric heaters are installed.
PHASE SEQUENCER (THREE-PHASE UNIT)
The phase sequencer is located in the electrical box in the outdoor section, thus assuring that the unit will not begin operation
while the phase connection of the compressor is not correct. Should this occur, then just switch two phase connections.
ON/OFF CONDENSATION PRESSURE CONTROL (MODELS 10-12-16)
The condensation pressure control consists of a pressure switch, which starts and stops the outdoor fan regulating the
condensation temperature, thus the unit will be able to operate in the cooling cycle when the outdoor temperature is below
19ºC (until 0ºC).
HOT GAS BYPASS VALVE
The purpose of the BYPASS valve is to make it possible for the unit to operate at low outdoor temperatures (until -10°C), to
be used in cooling-only and heat-pump units in the cooling cycle.
It regulates the capacity of the compressor by injecting hot gas from the compressor discharge side to the evaporator.
CONTROL USING A PROGRAMMABLE CONTROLLER:
With the programmable controller option, the desired temperature can be programmed in the area 24 hours a day, 7 days a
week.
ELECTRIC HEATER
Optionally, these units can contain shielded element electric heating batteries that are mounted on the inside of the unit in the
schematic opposite.
The electric heater must get its power from the unit’s electrical box.
A HEATING COIL FROZEN DUE TO LOW AMBIENT CONDITIONS IS NOT COVERED BY THE WARRANTY.
22,7
MODELS LFXO 10
MAXIMUM
CURRENT
(A) 230 / III
400 / III
POWER kW
12-16-22
7
WEIGHTS Kg (*)
STAGES
1 1
6
15,1
8,7
9
13,1
7
24-28-30
8
1
7,5
18,9
10,9
12
30,2
17,4
6
15,1
8,7
9
22,7
13,1
230 / I ---- ---- ---- ---- 26,1 ----
(*) Add to the unit's weight.
PROTECTION AGAINST FREEZING:
• Use glycol water.
GLYCOL IS THE ONLY EFFECTIVE PROTECTION AGAINST FREEZING.
• Regulation components should be used and in addition security components if they are needed.
• Drain the installation. You must ensure that the manual or automatic air vents have been installed on all high points in the
system. In order to drain the system check that all the drain cocks have been installed on all low points of the system.
DIFFERENCE IN TEMPERATURES
BETWEEN HOT WATER INTAKE
AND THE AIR WHICH ENTERS
THE COIL
50ºC 60ºC 70ºC
WATER
FLOW
L/H
WATER COIL
PRESSURE
DROP
kPa
AIR
PRESSURE
DROP
Pa
10-12
CAPACITY IN W
CAPACITY IN W
CAPACITY IN W
9000 11000 12800
15000 18000 21000
24500 29500 34400
500
1000
1500
0,5
1,5
3
35-30
30-25
25-20
22
24-28-30
16
CAPACITY IN W
14500 17500 20400 1000 1,5
35-30
Nr
ROWS
2
2
2
2
WEIGHT
Kg
4
6
7
5
WATER
OUTLET
DIAMETER
Inches
3/4"
3/4"
3/4"
3/4"
MODELS
FLC/FLH
INDOOR UNIT
nominal-minimum
air flow