Table 34: Lifespan of common parts
Description
Applicable models or sections
Lifespan of common parts
Bearing For Refrigerant Pump
Every 20,000 hrs
Refrigerant Pump
Every 60,000 hrs
Rupture disk
30000
Water Line Solenoid Valve
AB41
Refrigerant Blow Solenoid Valve AB41
Every 30,000 hrs
Float Valve
For HG float box
Float Valve
For refrigerant tank
Three-Way Valve (Option)
For hot water of simultaneous
operation
Every 60,000 hrs
Compound Gauge
Every 48,000 hrs
Rubber Hose Set For Purge Line
Every 18,000 hrs
Water quality control
Use the following guidelines to be sure of the highest water quality control standards:
• Limit the water pressure to the maximum safe working pressure for chilled/hot and cooling
water.
• Install a 10-20 or finer mesh strainer in the chilled/hot and cooling water piping.
• Install a thermometer and a pressure gauge in the inlet and the outlet of the chilled/hot and
cooling water piping.
• Install tapping (with valve) for chemical cleaning of the inlet and the outlet of the chilled/hot and
cooling water piping.
• Install an air vent valve at the highest part of the piping and a drain valve at the lowest part of
the piping.
• Replace the water regularly and control the water quality. Operating the chiller-heater for long
periods of time with low quality water causes corrosion and the production of scale.
• Make sure the shut off valves installed at the chiller-heater inlet of the chilled/hot, and cooling
water are completely open.
Note:
If the chiller-heater runs without the valves completely open, a strong turbulent flow
can be generated. The turbulence can cause damage in the water chamber case and the
copper tube of the chiller-heater. If you need to adjust the flow rate of the chilled/hot and
the cooling water, adjust the valves installed at the outlet side of the chiller-heater.
• Install an expansion tank on the hot water line if the hot water is a closed system.
Chemical water treatment
As the mineral content of the water circulated through the evaporator, condenser, and absorbers
varies, the water used can corrode the tubes or deposit heat resistant scale in them.
Perform a chemical analysis of the water before the system is installed. Consult a reliable water
treatment company to determine if treatment is necessary. If it is, the company can provide
treatment for the water to help prevent damage to the tubes.
159
Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater
