
78
Enertech Global
IOM, ZS/ZT Models
Performance Check
Heat of Extraction(HE)/Rejection(HR)
Record information on the Unit Start-up Form
Equipment should be in full load operation for
a minimum of 10 minutes in either mode – WITH
THE HOT WATER GENERATOR TURNED OFF.
1. Determine flow rate in gallons per minute
• Check entering water temperature
• Check entering water pressure
• Check leaving water pressure
Once this information is recorded,
• Find corresponding entering water
temperature column in the HE/HR Table.
• Find pressure differential in PSI column.
• Then read the GPM column to determine
flow in GPM.
2. Check leaving water temperature of unit.
• FORMULA: GPM x water temp diff. x 485
(antifreeze) or 500 (fresh water) = HE or HR in
BTU/HR
A 10% variance from table is allowed. Always
use the same pressure gauge & temperature
measuring device. Water flow must be in range
of table. If system has too much water flow,
performance problems should be expected.
Select the topic for your maintenance need.
Scan the QR code to access the video. Follow
the directions and tips provided to make the
project easier to complete.
Installation or Troubleshooting Tip Videos QR
Codes
ECM Temporary Replacement
ECM Motor Troubleshooting
Troubleshooting a TXV
Compressor Troubleshooting
Variable Speed Flow Centers
Return Conversion for and XT or CT
Heat Of Extraction and Rejection
Measuring Subcooling/Superheat
Nitrogen Purge While Brazing
Leak Testing an Air Coil
Loop Flushing
Repairing a Microchannel Air Coil
Testing a Coaxial Heat Exchanger
Troubleshooting a TXV
Installing a YT Vertical Unit
SECTION 12: TROUBLESHOOTING
Содержание ZS.
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