JOHNSON CONTROLS
129
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
7
SECTION 7 – MAINTENANCE
When inspecting and maintaining the absorption chill-
er, observe the following items:
• Never splash water over the electrical parts in-
stalled to the control panel and absorption chiller.
• Do not change the set values of the control de-
vices and safety switches without first contacting
you local Johnson Controls Service Office.
• Do not turn the internal cycle control valve of the
absorption chiller without permission.
• When replacing the oil in the vacuum pump, be
sure to turn OFF the main circuit breaker (MCB1)
in the control panel.
VALVE INSPECTION
The chiller is equipped with a refrigerant manual blow
valve (V8) that blows refrigerant from the refrigerant
tank to the absorber directly. See
The refrigerant blow valve must not be tampered with
or the settings changed. The only exception is daily
maintenance and inspection.
WARNING: During service and main-
tenance work, be sure to turn OFF the
main circuit breaker (MCB1) and fully
close the main valve of hot water line. If
not, it may cause electric shock and burn.
CAUTION: Contact your local Johnson
Controls Service Office for inspection and
maintenance of the machine. Improper
inspection and maintenance can not only
cause a machine malfunction or injury.
SOLENOID VALVES
The absorption chiller is equipped with the following
solenoid valves.
TABLE 28 -
SOLENOID VALVES
SOLENOID VALVE
NAME
SYMBOL
FUNCTION
Purge solenoid valve (1)
SV1
Close vacuum pump
piping
Purge solenoid valve (2)
SV2
Refrigerant blow
solenoid valve
SV3
Close automatic
refrigerant blow piping
PUMP SHUT OFF VALVES
The chiller is equipped with the pump shut off valves
shown in
and
. They are used for inspection of the pumps.
If the absorption chiller is operated with incorrect valve
settings, the pump may be damaged. Do NOT tamper
with the valves.
AIR PURGE VALVES AND DRAIN VALVES
FOR CHILLED WATER, COOLING WATER,
AND HOT WATER
The chiller is equipped with air purge valves and drain
valves for chilled water, cooling water, and hot water.
They are used to drain the chilled water, cooling water,
hot water, and purge air when water is supplied.
WARNING: The installation and inter-
locking of these valves with the chiller
control panel is mandatory for safe and
reliable operation of the chiller and
to prevent potential crystallization of
lithium bromide solution and freezing of
the evaporator tubes.
PURGE VALVES
The chiller is equipped with the purging valves shown
in
and
. For operation of those valves, see
.
