York EX Series - Water Quality Control

JOHNSON CONTROLS
150
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
SECTION 7 – MAINTENANCE
DESCRIPTION
APPLICABLE MODELS
OR SECTIONS
LIFESPAN OF
COMMON PARTS
Differential Pressure Switch YPS-C104Q/ 69WC1(69WC2)
every 30,000 hrs
Pressure Switch 63SH1 (69AP1)(69AP2)
Pressure Sensor PA-830-102A-10
Resistance Temp. Sensor Pt100 Ω
Thermocouple
Float Switch Ref. tank
Exhaust Gas Temp. Switch Ew-3
Electrode (HG Sol Level Sensing)
Bearing for Sol. Circulation Pump every 20,000 hrs
Sol. Circulation Pump every 60,000 hrs
Bearing for Sol. Spray Pump every 20,000 hrs
Sol. Spray Pump every 60,000 hrs
Bearing For Refrigerant Pump every 20,000 hrs
Refrigerant Pump
every 60,000 hrs
Vacuum Pump
Pump Shut Off Valve(Option)
every 48,000 hrs
Pressure Release Valve
Purge Solenoid Valve AB41
every 30,000 hrs
Refrigerant Blow Solenoid Valve AB41
Float Valve For HG oat box
every 60,000 hrs Float Valve For refrigerant tank
Three-Way Valve (Option) For residential hot water line
Compound Gauge
every 48,000 hrs
Vacuum Gauge
Rubber Hose Set For Purge Line every 18,000 hrs
Oil For Purge Pump ULVAC R-7 every 3,000 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 wa-
ter.
• Installa10-20orner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.
TABLE 27 - LIFESPAN OF COMMON PARTS (CONT'D)
• Replace the water regularly and control the wa-
ter quality. Operating the chiller-heater for long
periods of time with low quality water will cause
corrosion and the production of scale.
• Make sure the shut off valves installed at the chill-
er-heater inlet of the chilled/hot, and cooling wa-
ter are completely open.
If the chiller-heater runs without the
valves completely open, a strong turbulent
ow can be generated. The turbulence
may cause damage in the water chamber
case and the copper tube of the chiller-
heater. If you need to adjust the ow rate
of the chilled/hot and the cooling water,
be sure to 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.