FORM 155.32-ICOM2.EN.UL
SECTION 7 – MAINTENANCE
ISSUE DATE:1/10/2018
JOHNSON CONTROLS
121
SECTION 7 – MAINTENANCE
When inspecting and maintaining the absorption chiller-heater, observe the following items:
• Never splash water over the electrical parts installed to the control panel and absorp-
tion chiller-heater.
• Do not change the set values of the control devices and safety switches without per-
mission.
• Do not turn the internal cycle control valve of the absorption chiller-heater without per-
mission.
• When replacing the oil in the vacuum pump, be sure to turn OFF the main circuit
breaker (MCB1) in the control panel.
EXHAUST DUCT INSPECTION
Inspect the exhaust duct periodically to check for a gas leak.
VALVE INSPECTION
The chiller-heater is equipped with a refrigerant manual blow valve (V8) that blows
refrigerant from the refrigerant tank to the absorber directly. See
,
.
The valve must not be tampered with or have its settings altered. Daily maintenance or
inspection is the only reason to touch the valve.
SOLENOID VALVES
The absorption chiller-heater is equipped with the following solenoid valves.
Table 35 -
Solenoid Valves
WARNING: If you smell gas, do not operate the machine or manipulate the switches
until the gas smell vanishes.
WARNING: During service and maintenance work, be sure to turn OFF the main cir-
cuit breaker (MCB1) and fully close the main valve of fuel gas line. If not, it may cause
electric shock and burn.
CAUTION: Contact your local Johnson Controls Service Office for inspection and
maintenance of the unit. Improper inspection and maintenance can cause a mechani-
cal malfunction or injury.
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
