Operating instructions

2761 40
i _71 30
(0301 60HZ CHARGING CHART
r_
46
41
35
29
24
18
13
7
40 50 60 70 8_0 90
SUCTION LINETEMPERATURE (_F}
_1 4 10 16 21 27 32
SUCTION LINETEMPERATURE (_C)
Fig. 22--Cooling Charging Chart, 48GX030 Un_l_°46
68E 100
<_'62C 90-
°- ,
_ 551 _
g _6o !
_48E 70
cu _ _
_41, =" i
o 6o !
- _so!
27[ 40
(042) 60HZ CHARGING CHART 0_ ]_=
_F ,C
I
I
-1 4 10 16 21 27 312 I
SUCTION LINE TEMPERATURE ("C) I
C00052
Fig. 24---Cooling Charging Chart, 48GX042 Units
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.
Before 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 injury or
death.
Cleaning the Blower Motor and Wheel
1. Remove and disassemble blower assembly as follows:
a. Remove unit access panel.
b. Disconnect motor lead from blower relay (BM). Discon-
nect yellow lead from temainal L2 of the contactor.
25
(036) 60HZ CHARGING CHART _J_
15
_5
95
B5
75
85
55
45
I
L
8o
4o so 6o _o
sucnoNLI_ETEMPERATUREII°_
I
-1 4 10 16 21 27 32
SUCTION LINE TEMPERA31JRE (°C)
Fig. 23---Cooling Charging Chart, 48GX036 U_ °51
68_
i _62I
q 551
ku
ku
_ 41"
z
O
_ a4_
271
2O;
(048) 60HZ CHARGING CHART
100
90-
o3
_o
uJ
_7o
_u
z
o_z6o_
L_
4O
3O
30 40 50 60 70 80 90
SIUCTION LINE TEMPE P,ATU RE I(°F)
I I '
-1 4 t0 16 21 27 32
SUCTION UNETEMPERATURE I°C)
Fig. 25--Cooling Charging Chart, 48GX048 Units°°53
c. On all units, remove blower assembly from unit. Remove
screws securing blower to blower partition and slide
assembly out. Be careful not to tear insulation in blower
compartment.
d. Ensure proper reassembly by marking blower wheel and
motor in relation to blower housing before disassembly.
e. Loosen setscrew(s) that secures wheel to motor shall
Remove screws that secure motor mount brackets to
housing, and slide motor and motor mount out of housing.
Remove and clean blower wheel as follows:
a. Ensure proper reassembly by marking wheel orientation.
b. Lift wheel from housing. When handling and/or cleaning
blower wheel, be sure not to disturb balance weights (clips)
on blower wheel vanes.