York YHAU-CE-JE Series, Установка, эксплуатация и обслуживание, Страница: 49 / 136

JOHNSON CONTROLS
49
FORM 155.33-ICOM2.EN.GB
ISSUE DATE:12/4/2017
5
SECTION 5 - COMMISSIONING
GENERAL GUIDELINES FOR USE
Before Operation
During commissioning, check the motor’s rotating
direction of the solution pump, refrigerant pump, and
purge pump.
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:
The flow of fluid cannot be seen because
the solution and refrigerant pumps are
hermetically sealed.
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 13 on page
49 to see if 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.
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.
TABLE 13 - ROTARY PUMP ROTATION
CORRECTION ROTATION
Solution circulation
pump 0.10 to 0.20 MPa.G
Solution spray pump -0.05 to 0.02 MPa.G
Refrigerant pump -0.08 to -0.02 MPa.
After the completion of the equipment work (installa-
tion of the chiller-heater, thermal insulation for cold
and hot surfaces, etc.), operate 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 19 on page 48 .
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.