User`s manual

30 40 50 60 70
SUCTION LINE TEMPERATURE (_F)
I I I I I
-1 4 10 16 21
SUCTION LINE TEMPERATURE (:C)
Fig 23--CooHn_
}L TDOOR TEMP
F C
115 46
105 41
95 35
85 29
75 24
65 18
55 13
45 7
80 90
I I
27 32
C00047
48G8048 UnRs
SUCTION LINE TEMPERATURE IF
-1 4 10 16 21 27 32
SUCTION LINE TEMPERATURE (:C)
C00048
Fig. 24--Cooling Charging Chart, 48GS060 Units
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease flora the blower wheel and
motor annually.
Befbre cleaning the blower motor and wheel, disconnect gas
supply. Then turn off and tag electrical power to the unit
Failure to adhere to this warning could cause serious injm T or
death.
(leaning the Blower Motor and Wheel
1, Remove and disassemble blower asserubly as %llows:
a, Remove unit access panel
b, Disconnect motor lead flora blower relay (BM) Discon=
nect yellow toad ['rom terminal L2 of the contactor
26
SUCTION LINE TEMPERATURE
Fig. 25--Cooling Charging Chart, 48GX024 UQ_0;049
c. On a/l units, remove blower assembly flora unit. Remove
screws securing blower to blower partition and slide
assembly out. Be care£hl not to tear insulation in blower
compartmenL
d. Ensure proper reassen£bly by marking blower wheel and
motor in relation _o blower housing before disassembly.
e. Loosen setscrew(s) that secures wheel to motor shaft.
Remove screws that secure motor mount brackets m
housing, and slide motor and motor mount out of housing.
2. Remove and clean blower wheel as %llows:
a. Ensure proper reassembly by marking wheel orientation.
b. Lif_ wheel from housing. When handling and/or cleaning
blower wheel, be sure not to disturb balance weights (clips)
on blower wheel vanes.
c. Remove caked-on dirt from wheel and housing with a
brush. Remove lint and/or dirt accumulations from wheel