SECTION 5 - COMMISSIONING
FORM 155.32-ICOM2.EN.UL
ISSUE DATE:1/10/2018
84
JOHNSON CONTROLS
Table 29 -
Rotary Pump Rotation
After the completion of the equipment work (installation of the chiller-heater, thermal
insulation for cold/hot surfaces, and other installation requirements), operate the chiller-
heater and measure the noise around the chiller-heater unit.
The noise data of the chiller-heater unit was measured in decibels at the factory. See
An 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 installation 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. Refer to the
Chiller-
Heater Pre-Start Up and Commissioning Checklist (Form 155.32-CL1)
for information.
PRECAUTIONS FOR THE USE OF WATER
Staining and corrosion of the tubes in the evaporator, absorber, and condenser depends on
the quality of the water used as chilled/hot water and cooling water. Water quality must be
checked periodically to prevent problems. If water quality is not controlled and maintained
properly, premature tube failure can result. Causes of bad quality water include:
• Polluted seawater
• Polluted underground water
• Cooling tower located near a chimney or in dirty air
Install strainers of 10 mesh and above to the chilled/hot water and cooling water inlets.
Shut off valves will be installed at the customer site in the chilled/hot water, and cooling
water inlets and outlets. Be sure the valves are completely open when suppling water. If
not, the water flow can become turbulent (at the shut off valves) and damage the water
chamber case and tubes. When you need to reduce the quantity of the chilled/hot water,
and cooling water temporarily, use the valves to make adjustments.
When the flow rate change of the chilled/hot water is controlled (if the flow rate change
function is installed), the load change speed is limited.
• The load change condition to limit the chilled/hot water temperature at the outlet is
±0.9°F
,
1.
5% minimum/maximum.
• The critical load change condition to prevent an over-cooling trip of the chiller-heater
is 5% minimum/maximum.
PUMP TYPE
CORRECT ROTATION PRESSURE
Solution Circulation Pump
14.5 to 29 PSI
(0.10 to 0.20 MPa.G)
Solution Spray Pump
-7.25 to -2.90 PSI
(-0.05 to 0.02 MPa.G)
Refrigerant Pump
-11.6 to -2.90 PSI
-0.08 to -0.02 MPa.G)
NOTE: Be sure to analyze the chilled/hot water and the cooling water within one month
after commissioning.
