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Unit start-up
□a. Oil heaters have been energized for at least 24 hours (30XQ)
□b. Oil level is correct
□c. All discharge and liquid valves are open
□d. All suction valves are open, if equipped
□e. All oil line valves and economizer discharge bubbler valves (if equipped) are open
□f. The contactor
□g. Checks have been carried out for any possible leaks. Unit has been leak checked (including fittings)
□g1 - on the whole unit
□g2 - at all connections
Locate, repair, and report any refrigerant leaks..............................................................................................................
.......................................................................................................................................................................................
□h. Check voltage imbalance: AB......... AC.................. BC..................
Average voltage =........................... V
Maximum deviation = ..................... V
Voltage imbalance = ........................ %
□i. Voltage imbalance is less than 2%
WARNING: Operation of the chiller with an improper supply voltage or excessive phase imbalance
constitutes abuse which will invalidate the Carrier warranty. If the phase imbalance exceeds 2% for voltage,
or 10% for current, contact your local electricity supply at once and ensure that the chiller is not switched
on until corrective measures have been taken.
□j.Check 4-way valve: running heating model first, and switch to cooling model. Then choose the right mode for the
requirement.
Check cooler water loop
Water loop volume = ........................... litres
Calculated volume = ........................... litres
3.5 litres/nominal kW capacity for air conditioning
6.5 litres/nominal kW capacity for process cooling
Proper loop volume established
Proper loop corrosion inhibitor included..........litres of............................
Proper loop freeze protection included (if required)................. litres of...............................
Piping includes electric heater tape, if exposed to the outside
Inlet piping to cooler includes a 20 mesh strainer with a mesh size of 1.2 mm
Anti-freeze module filled with water and no leakage.
Check pressure drop across the cooler
Entering cooler =................................ kPa
Leaving cooler = .................................kPa
Leaving - entering = ........................... kPa
Warning: Plot cooler pressure drop on performance data chart (in product data literature) to determine total
litres per second (l/s) and find unit's minimum flow rate.
Total = ................................................... l/s
Nominal kW = ..................................... l/s
Total l/s is greater than unit's minimum flow rate
Total l/s meets job specified requirement of.......................................... l/s
Warning: Once power is supplied to the unit, check for any alarms (refer to the 30XQ controls IOM for the
alarm menu).
Note all alarms:.........................................................................................................................................................
.......................................................................................................................................................................................
Notes:............................................................................................................................................................................
.......................................................................................................................................................................................
Carrier Yileng - Shanghai, China
47
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