JOHNSON CONTROLS
15
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
2
The principle of refrigeration is the exchange of heat
and, in absorption liquid chilling, there are four basic
heat exchange surfaces: the evaporator, the absorber,
the generator, and the condenser.
Like any refrigeration system, an absorption chiller
uses evaporation and condensation to remove heat. The
single effect absorption cycle uses deionized water as
the refrigerant and lithium bromide (LiBr) as the ab-
sorbent. The entire process occurs in almost a complete
vacuum.
CHILLER COMPONENTS
The absorption chiller unit consists of the following
components:
• evaporator
• absorber
• condenser
• generator
• solution heat exchanger to heighten the cycle ef-
ficiency and piping to connect them
• pumps to circulate the refrigerant and solution in
the cycle
• purge unit to purge non-condensable gas from the
machine
SECTION 2 – PRODUCT DESCRIPTION
CONTROL PANEL
The absorption chiller comes with a factory mounted
and pre-wired control system. The control panel en-
closure is equipped with a hinged access door with
lock and key. The control panel includes a touch panel
showing all system parameters in various languages
with numeric data in metric units. For details of the
.
The unit is also equipped with two methods to start and
stop operations:
• touch panel
• external signal
LD22981
FIGURE 1 -
YHAU-CL/CH UNIT COMPONENTS
A
B
C
D
E
F
G
H
I
J
K
L
NOTE:
Confirm the main power switch
is within 6.56 feet (2 meters) of the
ground. If not, please install the opera-
tion platform.
WARNING: Turn off the power supply
by the handle breaker when opening the
control panel.
ITEM
DESCRIPTION
A
Cooling water inlet
B
Chilled water inlet
C
Evaporator
D
Absorber
E
Chilled water outlet
F
Cooling water outlet
G
Hot water outlet
H
Condenser
I
Generator
J
Hot water inlet
K
Solution pump
L
Display
M
Control panel
M
