Bryant 547K, Инструкции по обслуживанию и техническому обслуживанию

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Refrigerant Charge
Amount of refrigerant charge is listed on the unit’s nameplate.
Refer to
Bryant GTAC2-5 Charging, Recovery, Recycling and
Reclamation
training manual and the following procedures.
Unit panels must be in place when unit is operating during the
charging procedure.
NO CHARGE
Use standard evacuating techniques. After evacuating system,
weigh in the specified amount of refrigerant.
LOW-CHARGE COOLING
Using Cooling Charging Charts, Fig. 22-25, vary refrigerant
until the conditions of the appropriate chart are met. Note the
charging charts are different from type normally used. Charts
are based on charging the units to the correct sub-cooling for
the various operating conditions. Accurate pressure gage and
temperature sensing device are required. Connect the pressure
gage to the service port on the liquid line. Mount the tempera -
ture sensing device on the liquid line and insulate it so that out -
door ambient temperature does not affect the reading. Indoor-
air cfm must be within the normal operating range of the unit.
.
EXAMPLE:
Model 547K*04A
Outdoor Temperature 85°F (29°C)
Suction Pressure 140 psig (965 kPa)
Suction Temperature should be 65°F (16°C)
USING COOLING CHARGING CHARTS
Take the outdoor ambient temperature and read the liquid pres
-
sure gage. Refer to chart to determine what liquid temperature
should be. If liquid temperature is low, add refrigerant. If liquid
temperature is high, carefully recover some of the charge. Re -
check the liquid pressure as charge is adjusted.
COOLING CHARGING CHARTS
Fig. 22 — Cooling Charging Chart - 3 Ton
Fig. 23 — Cooling Charging Chart - 4 Ton
547K SIZE DESIGNATION NOMINAL TONS REFERENCE
04 3
05 4
06 5
07 6
48TC003781 A
SUCTION LINE TEMPERATURE [°F/°C]
-1.1 1.7 4.5 7.2 10.0 12.8 15.6 18.3 21.1 23.9 26.7 29.5 32.2
30 35 40 45 50 55 60 65 70 75 80 85 90
]
a
p
K /
gi
s
p[
E
R
U
S
S
E
R
P
N
OI
T
C
U
S
551
620
689
758
827
896
965
1034
1103
1172
1241
80
90
100
110
120
130
140
150
160
170
180
3 Ton FCQ / 547K / RHV
R410A Charging Chart
(Unit must be operated in cooling mode)
OUTDOOR
TEMP
°F / °C
115 / 46
105 / 41
95 / 35
85 / 29
75 / 24
65 / 18
55/ 13
45/ 7
48TC003782 A
SUCTION LINE TEMPERATURE [°F/°C]
-1.1 1.7 4.5 7.2 10.0 12.8 15.6 18.3 21.1 23.9 26.7 29.5 32.2
30 35 40 45 50 55 60 65 70 75 80 85 90
]
a
p
K /
gi
s
p[
E
R
U
S
S
E
R
P
N
OI
T
C
U
S
551
620
689
758
827
896
965
1034
1103
1172
1241
80
90
100
110
120
130
140
150
160
170
180
4 Ton 50FCQ / 547K / RHV
R410A Charging Chart
(Unit must be operated in cooling mode)
OUTDOOR
TEMP
°F / °C
115 / 46
105 / 41
95 / 35
85 / 29
75 / 24
65 / 18
55/ 13
45/ 7