![START UP CONT’D.](/images/new-backgrounds/33469/3346933x1.webp)
START UP CONT’D.
SAFETY PRACTICES:
1.Never mix
2.Use gloves and safety glasses, Polyol Ester oils can be irritating to the skin, and liquid refrigerant will freeze the skin.
3.Never use air and
4.Do not inhale
5.Do not burn
6.Use only cylinders rated DOT4BA/4BW 400.
7.Never fill cylinders over 80% of total capacity.
8.Store cylinders in a cool area, out of direct sunlight.
9.Never heat cylinders above 125°F.
10.Never trap liquid
IMPORTANT INSTALLER NOTE
For improved
PRESSURE SERVICE PORTS
HIGH & LOW PRESSURE SWITCH
All models are supplied with a remote reset high and low pressure switch. If tripped, this pressure switch may be reset by turning the thermostat off then back on again.
High/Low Pressure control provides protection for the compressor. In the event system pressures go above 540 PSI or below 35 PSI, in either cooling or heating mode, the compressor will be stopped. This will activate the “L” terminal of the low voltage terminal strip. This terminal can be used for remote indication of a pressure lockout. The lockout circuit will hold compressor off line. When the system problem is corrected, the unit operation can be restored by turning the main power supply off and then back on, or reset the room thermostat. The low pressure control has a bypass to eliminate nuisance lockout on cold start up.
The bypass timer should be set to 200 seconds, and this is to assure there is no nuisance tripping of the low- pressure control during startup in heating mode under cold weather conditions. See Figure 10:
FIGURE 11
LOW PRESSURE CONTROL BYPASS TIMER
THREE PHASE SCROLL COMPRESSOR START UP INFORMATION
Scroll compressors, like several other types of compressors, will only compress in one rotational direction. Direction of rotation is not an issue with single phase compressors since they will always start and run in the proper direction.
However, three phase compressors will rotate in either direction depending upon phasing of the power. Since there is a
Verification of proper rotation must be made any time a compressor is changed or rewired. If improper rotation is corrected at this time there will be no negative impact on the durability of the compressor. However, reverse operation for over one hour may have a negative impact on the bearing due to oil pump out.
NOTE: If compressor is allowed to run in reverse rotation for several minutes, the compressor’s internal protector will trip.
All three phase ZR3 compressors are wired identically internally. As a result, once the correct phasing is determined for a specific system or installation, connecting properly phased power leads to the same Fusite terminal should maintain proper rotation direction.
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