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FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
GENERAL GUIDELINES FOR USE
Before Operation
During commissioning, check the motor's rotating
direction of the solution pump, refrigerant pump, and
purge pump:
The flow of fluid cannot be seen because
the solution and refrigerant pumps are
hermetically sealed.
The rotation direction can be tested by using a rotation
detector (Bell and Gosset or WILO DKG). If a rota-
tion detector is not available, use the procedure shown
below:
1. Remove the plugs at the solution and refrigerant
sampling valves.
2. Make sure the valves are completely closed.
3. Confirm that the absorber and refrigerant tank
contain enough solution and refrigerant.
4. Connect a compound gauge (NPT 1/2") to the
sampling valve with Teflon tape.
The gauge scale must be -760 mm Hg. to
2 Kg. / cm
g, or -30 inches Hg. to 30 psig.
2
To prevent corrosion of the gauge, clean
it thoroughly, and check it for leaks after
each use.
5. Operate the pump.
6. Open the valve.
7. Read and record the delivery pressure of the solu-
tion pump and the refrigerant pump.
8. Close the valve.
9. Check the pressure readings. See Table 18 on page
71 to see if your pump rotation is in the right
direction. The correct directions shows a higher
discharge pressure.
The delivery pressure reflects the high
vacuum condition of the machine. If the
inside pressure is atmospheric, add 1.0 kg
/ cm (14.3 psig)to the standards in table.
JOHNSON CONTROLS
SECTION 5 - COMMISSIONING
TABLE 28 - ROTARY PUMP ROTATION
After the completion of the equipment work (installa-
tion of the chiller-heater, thermal insulation for cold/
hot surfaces, etc.), operate the chiller-heater and mea-
sure the noise around the chiller-heater unit.
The noise data of the chiller-heater unit was measured
in decibels at the factory. See Figure 26 on page 76.
A Earth Leakage Breaker (ELB) is not installed on
this chiller-heater unit. You MUST install an adequate
ground fault circuit breaker at the primary side of the
chiller-heater unit.
The Chiller-heater Pre-Start Up and Commissioning
Checklist contains specific information for the instal-
lation and start-up of the unit. The steps and procedures
MUST be performed by a YORK/Johnson Controls
Service person prior to customer use.
All items on the checklist MUST be completed prior to
charging and initial operation. Failure to do this may
result in machine malfunction, damage, and/or injury.
10. Remove the compound gauge.
11. Put the plugs back on the valves.
12. Clean the gauge with water.
13. For refrigerant, confirm the correct rotation by
looking at the refrigerant spray through the sight
glass.
CORRECTION ROTATION
Solution Circulation
Pump
Solution Spray Pump
Refrigerant Pump
0.10 to 0.20 MPa.G
-0.05 to 0.02 MPa.G
-0.08 to -0.02 MPa.G
77
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Troubleshooting
