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B. For 460-v Motors
The motor leads are color coded as follows:
3-SPEED (060 ONLY) 2-SPEED
black = high speed black = to purple
- yellow = line
orange = medium speed purple = to black
blue = low speed red = line
To change the speed of the blower motor (BM) from low speed to
high speed, removethe red lead from the indoor-fan relay (IFR).
Insulate the red lead to avoid contact with any chassis parts.
Separate the black lead from the purple lead. Connect the black
lead to the IFR. Insulate the purple lead to avoid contact with any
chassis parts.
V. UNIT CONTROLS
All compressors have the following internal-protection controls.
A. HIGH-PRESSURE RELIEF VALVE
This valve opens when the pressure differential between the low
and high side becomes excessive.
B. COMPRESSOR OVERLOAD
This overload interrupts power to the compressor when either the
current or internal temperature become excessive, and automati-
cally resets when the internal temperature drops to a safe level.
This overload may require up to 60 minutes (or longer) to reset;
therefore, if the internal overload is suspected of being open,
disconnect the electrical power to the unit and check the circuit
Fig. 17—Cooling Charging Chart—564A036 Units
C00017
°
OUTDOOR TEMP
° F ° C
115 46
45 7
55 13
65 18
75 24
95 35
105 41
85 29
Fig. 18—Cooling Charging Chart—564A042 Units
C00018
°
OUTDOOR TEMP
° F ° C
115 46
45 7
55 13
65 18
75 24
95 35
105 41
85 29
Fig. 19—Cooling Charging Chart—564A048 Units
C00019
°
OUTDOOR TEMP
° F ° C
115 46
45 7
55 13
65 18
75 24
95 35
105 41
85 29
Fig. 20—Cooling Charging Chart—564A060 Units
C00020
°
OUTDOOR TEMP
° F ° C
115 46
125 52
45 7
55 13
65 18
75 24
95 35
105 41
85 29
—13—