Startup And Shutdown Procedures - Daikin Trailblazer AGZ030-101E Installation, Operation And Maintenance Manual

Air-cooled scroll compressor chillers with high efficiency variable speed fan technology

Table of Contents

NOTE: Installation and maintenance are to be performed

only by qualified personnel who are familiar with local

codes and regulations, and experienced with this type

of equipment.

DANGER

LOCKOUT/TAGOUT all power sources prior to starting,

pressurizing, de-pressuring, or powering down the Chiller.

Failure to follow this warning exactly can result in serious injury

or death. Be sure to read and understand the installation,

operation, and service instructions within this manual.

Pre-Startup

Inspect the chiller to ensure no components became loose or

damaged during shipping or installation including leak test and

wiring check. Complete the pre-start checklist at the front of

this manual and return to Daikin Applied prior to startup date.

Pre-Startup Checkout

1. Verify chilled water piping requirements from

are met.

2. Check the pump operation and vent all air from the

system.

3. Circulate evaporator water, checking for proper system

pressure and evaporator pressure drop. Compare the

pressure drop to the evaporator water pressure drop

curve.

4. Flush System and clean all water strainers before placing

the chiller into service.

5. Check water treatment and proper glycol percent, if

used.

6. Check all exposed brazed joints for evidence of leaks.

Joints may have been damaged during shipping or when

the unit was installed.

7. Check that all refrigerant valves are either opened or

closed as required for proper operation of the chiller.

8. A thorough leak test must be done using an electronic

leak detector. Check all valve stem packing for leaks.

Replace all refrigerant valve caps and tighten.

9. Check all refrigerant lines to insure that they will not

vibrate against each other or against other chiller

components and are properly supported.

10. Check all connections and all refrigerant threaded

connectors.

11. Look for any signs of refrigerant leaks around the

condenser coils and for damage during shipping or

installation.

12. Connect refrigerant service gauges to each refrigerant

circuit before starting unit.

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Pre-Startup Electrical Check Out

Electrical power must be applied to the compressor crankcase

heaters 8 hours before starting unit to eliminate refrigerant

from the oil.

1. Open all electrical disconnects and check all power

wiring connections. Start at the power block and check

all connections through all components to and including

the compressor terminals. These should be checked

again after 3 months of operation and at least yearly

thereafter.

2. Check all control wiring by pulling on the wire at

connections and tighten all screw connections. Check

plug-in relays for proper seating and to insure retaining

clips are installed.

3. Put System Switch (S1) to the Emergency Stop position.

4. Put both circuit #1 & #2 switches to the Pumpdown and

Stop position.

page 12

5. Apply power to the unit. The panel Alarm Light will stay

on until S1 is closed. Ignore the Alarm Light for the check

out period. If you have the optional Alarm Bell, you may

wish to disconnect it.

6. Check at the power block or disconnect for the proper

voltage and proper voltage between phases. Check

power for proper phasing using a phase sequence meter

before starting unit.

7. Check for 120 Vac at the control transformer and at TB-2

terminal #1 and the neutral block (NB).

8. Check between TB-2 terminal #7 and NB for 120 Vac

supply for transformer #2.

9. Check between TB-2 terminal #2 and NB for 120 Vac

control voltage. This supplies the compressor crank case

heaters.

10. Check between TB-3 terminal #17 and #27 for 24 Vac

control voltage.

Startup

Refer to the MicroTech

to become familiar with unit operation before starting the chiller.

There should be adequate building load (at least 50 percent

of the unit full load capacity) and stable conditions to properly

check the operation of the chiller refrigerant circuits.

Be prepared to record all operating parameters required by

the "Compressorized Equipment Warranty Form". Return

this information within 10 working days to Daikin Applied as

instructed on the form to obtain full warranty benefits.

Startup Steps

• Verify chilled water flow rate.

• Calibrate thermal dispersion flow switch, see instructions

page 104

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IOM 1206-13 • TRAILBLAZER