Table of Contents
Advertisement
FORM 155.35-ICOM2.EN.CE/GB (1018)
DATE: 10/30/2018
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 quickly tested by using a
rotation detector (Bell and Gosset or WILO DKG). If
a rotation detector is not available, follow these steps:
1. Remove the plugs at the solution and refrigerant
sampling valves.
2. Make sure the valves are completely closed.
3. Confirm the absorber and the refrigerant tank con-
tain enough solution and refrigerant.
4. Connect a compound gauge (NPT 1/2 inch) to the
sampling valve with Teflon tape.
The gauge's scale must be -760 mm Hg.
to 2 Kg per cm2g, or -30 inches Hg. to 30
psig. To prevent corrosion of the gauge,
clean it thoroughly and check for leaks
after use.
5. Operate the pump and open the valve.
6. Read and record the delivery pressure of the solu-
tion pump and the refrigerant pump.
7. Close the valve.
8. Check the pressure readings. See Table 14 on
page 55 to verify that your pump rotation is in
the right direction. The correct direction 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 per cm (14.3 psig) to the standards in
table.
JOHNSON CONTROLS
SECTION 5 - COMMISSIONING
TABLE 14 - ROTARY PUMP ROTATION
After the completion of the equipment work (installa-
tion of the chiller-heater, thermal insulation for cold
and hot surfaces, and other installation processes), op-
erate the chiller-heater and measure the noise around
the chiller-heater unit.
The noise data of the chiller-heater unit is measured in
decibels in the factory. See Figure 20 on page 53.
Double-check that an Earth Leakage Breaker (ELB) is
installed at the primary side of the unit. If one is not
installed, install it before continuing.
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 the items on the checklist MUST be completed pri-
or to charging and initial operation. Failure to do this
may result in injury, machine malfunction, or damage.
9. Remove the compound gauge.
10. Put the plugs back on the valves.
11. Clean the gauge with water.
12. For the 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.
55
5
Advertisement
Table of Contents
Troubleshooting
