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Check the following before powering the unit.
•
Avoid starting any electrical equipment for the first time
alone, always have another person a safe distance from
the unit that can turn off the main power in the event of
an accident.
•
High voltage supply matches the nameplate rating.
•
Field wire size, breakers and fuses are the correct size.
•
Low voltage control circuit is correct.
•
Water piping is complete and correct.
•
Closed loop system is flushed and purged.
•
Isolation valves are open.
•
Loop pumps are correctly wired.
•
Access panels are in place and secured.
•
Thermostat is in "off" position.
Check, Test and Start (See Form on
1. Set thermostat to highest position.
2. Set thermostat switch to "cool". Compressor should not
operate. The source water pump should energize.
3. Slowly lower the thermostat setting until the compressor is
energized. Regulate the water flow utilizing the P/T plugs
and compare to the performance tables.
4. Check the cooling refrigerant pressures against valves with
the tables .
5. Turn thermostat switch to the "off" position. The unit will
stop running and the reversing valve should de-energize.
6. Leave unit "off" for approximately five minutes to allow
pressure to equalize.
7. Adjust thermostat to lowest setting.
8. Set thermostat switch to "heat" position.
9. Slowly adjust thermostat to higher temperature until com-
pressor energizes.
10. Compare the heating refrigerant pressure with valves with
the tables .
11. Check for vibrations, noise, water leaks, etc.
12. Adjust thermostat to correct mode and set to maintain
desired temperature.
13. Instruct the equipment owner/operator of correct thermostat
and system operation.
14. Be certain to complete and forward the warranty papers to
Daikin .
Page 8 of 44
Electric Shock Hazard.
Turn Off All Power
Before Servicing.
page
40)
Water to Water Source Heat Pumps
Maintenance Procedures
Proper maintenance is important to provide the most efficient
operation and longest life for your equipment. The following
points are to serve as a general guide. Always consult with your
maintenance contractor with regard to the specific requirements
of your own installation.
Paint Finish
The electrodeposition paint finish may be polished if de-
sired. Spray paint is available in case of accidental scratching
or chipping.
The following should be checked only by a competent
contractor.
Contactor Points
Check contactor points twice a year to see that they are not
burned or pitted as a result of low voltage, lightning strikes, or
other electrical difficulties.
Water System
The water circulating pump should be checked and cleaned,
so that it is operating normally. Clogged coils lead to high head
pressures and inefficient operation. If coil is limed, a cleaning
treatment may be necessary. Water coils should be checked
yearly for liming or clogging.
Improper Unit Functioning
If unit is not performing properly, several readings of tem-
perature, pressure and electrical characteristics need to be taken.
The normal required troubleshooting information is listed on the
Check, Test and Start Form on
Notes: DO NOT place refrigeration gauges on system for
Check, Test and Start procedure. (To be used for
major service only.) To Installer: Fill out Check, Test
and Start Form on
page 40
customer.
page
40.
and leave copy with the
IM 1072-1
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