Lennox AQUALEAN AWC Application Manual page 22

GENERAL CHARACTERISTICS
1.11.- OPTIONS
HYDRAULIC OPTIONS (Supplied loose)
UNITS INSTALLATION WITH TWO WAY VALVES. (UNITS 007 to 020).
AB
UNITS INSTALLATION WITH THREE WAY VALVES. (UNITS 007 to 020 and 002-003 LWT version).
AB
1
OPTION DESCRIPTION
WATER FILTER This option is supplied loose.
(Units 007 to 020).
The water fi lter must be fi tted in the water
inlet of the unit, it protects the unit against
particles (greater than 1 mm) getting
inside the water circuit, and prevents the
1
water interchanger clogging.
The unit pressure drops are different when
a water fi lter is installed (see table page
14).
FLOW SWITCH. This option is supplied loose.
(Units 007 to 020).
The fl ow switch stops the compressor if
water fl ow is lower than the minimum fl ow.
This option is incompatible with the water
2
differential pressure switch option and with
the low water temperature option.
WATER DIFERENTIAL This option is supplied loose.
PRESSURE SWITCH.
The differential pressure switch stops the
(Units 007 to 020).
compressor if there is not water fl ow.
This option is incompatible with the water
3
switch.
The unit can work with water tempera-
LOW WATER TEMPER-
ATURE.
tures below 16ºC (down to 0ºC) in cooling
(Units 007 to 020).
mode.It includes 3-way valve+actuator
(supplied loose) and a high pressure
transducer included into the unit.The valve
with the actuator controls the water tempe-
4
rature based on condensing temperature
openning or closing the valve.
The valve is managed by the control of the
unit. The valve has to be assembled in the
return.
LOW WATER TEMPERA- The unit can work with water tempera-
TURE. (LWT VERSION).
tures below 16ºC (down to 0ºC) in cooling
(Units 002-003).
and heating modes.It includes 3-way
valve+actuator (supplied loose) and a high
pressure transducer included into the unit.
The valve with the actuator controls the
5
water temperature based on condensing
temperature openning or closing the valve.
The valve is managed by the control of the
unit. The valve has to be assembled in the
return.
• 20 •
2
4
A
3
1
2
4
A
B 3
2
4
A
AB
3
1
2
4
A
AB
B
3
1
REGULA-
TYPE
FUNCTION
TION
Safety Mesh N/A
1mm
Safety. Paddle Factory
setting
Minimum
water fl ow
Safety. Con- N/A
Water tact
fl ow YES/
NO
Water 0-10 V Control
fl ow regu- para-
lation metres
factory
setting
Water 0-10 V Control
fl ow regu- para-
lation metres
factory
setting
INSTALLATION
(See units installation drawing above)
Hydraulic connection: 1" G H-H
Hydraulic connection: 1"G M-H
Electric: Remove shunt and connect ac-
cording to the electrical drawing delivered
with the unit.
Hydraulic connection: 3/8" G M
Electric: Remove shunt and connect ac-
cording to the electrical drawing delivered
with the unit.
Hydraulic connection: 1"G. When install-
ing the valve be sure that the fl ow direction
is the correct.
Electric: connect according to the electrical
drawing.
2 ways installation: It is possible
to use the 3 ways valve delivered
with the option and a cap (See fi g.)
Hydraulic connection: 3/4"G.
Flexible connections and a 3-way valve
(4 ports).
AQUALEAN - AWC/AWH - MIL118E-1407 / 10-2013
Cap