United cool air C13-Series, Инструкция по установке, эксплуатации и обслуживанию

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Installation, Operation and Maintenance Manual
C13-Series
37 Subject to change without notice. 10.20-IM (0818)
Start-Up Procedures
(R-410a Systems)
Continued:
21� Using an appropriate pressure / temperature chart for
R-410a refrigerant, look up and record the saturation
temperature corresponding to the suction pressure�
22� Calculate and record the suction superheat for each
circuit by taking the difference between the suction
line temperature and the saturation temperature
corresponding to the suction pressure�
23�
Record the liquid line pressure and the liquid line
temperature for each circuit near the condenser coil
outlet�
24� Using an appropriate pressure / temperature chart for
R-410a refrigerant, look up and record the saturation
temperature corresponding to the liquid line pressure�
25� Calculate and record the liquid sub-cooling for each
circuit by taking the difference between the liquid
line temperature and the saturation temperature
corresponding to the liquid line pressure�
26� Record the Amps for the evaporator blower motor, each
compressor and the condenser blower motor� If the
system is single phase, use L1 and L2 only�
a�
Make sure the pressures on each compressor circuit
are within the proper limits:
i� 290 – 550 Discharge
ii� 100 – 140 psig Suction
b� Compressor Amperage is below the RLA Amps
listed on the unit data tag�
i�
The maximum compressor operating current
(amps) at start up depends a lot on the system
loading� The lower the load, the less the current�
The higher the load, the higher the current�
c� The blower motor FLA values should never be
exceeded�
i� If the FLA value is exceeded, shut the unit off
and check the duct design, sheave turns open
or make sure there is no blockage / obstruction
in the duct or filters.
27�
Document any additional information deemed
appropriate for the specific application or installation.
28� Shut the system down and remove all test instruments
and test sensors�
29� Leave the system in the operating mode as appropriate
for the customer and the application�
Optional Heating Start Up:
30� If the system has any optional heat, set the room
thermostat approximately 5
°
higher than the actual
room temperature� Set the controller operating mode to
the HEAT position�
31� Dependent upon the heating source the heating valve
or switch / contactor should be activated�
32� After several minutes of operation, record the return air
temperature and the supply air temperature�
33� Based on the heating source, document the
appropriate temperatures, pressures, voltage or amp
values�