Unitary products group HF-07, Руководство по установке

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035-18518-001-B-0703
Unitary Products Group 15
START-UP
CRANKCASE HEATER
The crankcase heaters must be energized at least 8
hours before starting the compressor. To energize the
crankcase heaters, the main disconnect switch must
be closed. During this 8 hour period, the system switch
on the room thermostat must be “OFF” to prevent the
compressor from starting.
Make sure that the bottom of the compressor is warm
to the touch to prove crankcase heater operation.
PRE-START CHECK
Before starting the unit, complete the following check
list:
1. Have sufficient clearances been provided?
2. Has all foreign matter been removed from the inte-
rior of the unit (tools, construction or shipping
materials, etc.)?
3. Have the condenser fans been rotated manually to
check for free rotation?
4. Are all wiring connections tight?
5. Does the available power supply agree with the
nameplate data on the unit?
6. Is the control circuit transformer set for the proper
voltage?
7. Have the fuses, disconnect switch and power wire
been sized properly?
8. Are all compressor hold-down nuts properly
secured?
9. Are any refrigerant lines touching each other or any
sheet metal surface? Rubbing due to vibration
could cause a refrigerant leak.
10. Are there any visible signs of a refrigerant leak,
such as oil residue?
11. Is any electrical wire laying against a hot refrigerant
line?
FIGURE 7 - CHARGING CURVE HA090
HF-07
Do not attempt to start the compressor without
at least 8 hours of crankcase heat or compres-
sor damage will occur.