Bryant Legacy 569J 16-28 Installation Instructions Manual page 13

LIQUID LINE
MODEL SIZES
569J***T/U a 16-28
569J***A/B 16-25
NOTE(S):
a. 569J***T/U units require TWO sets of parts.
In some applications, depending on space and convenience re-
quirements, it may be desirable to install 2 filter driers and
sight glasses in a single circuit application. One filter drier and
sight glass may be installed at A locations (see Fig. 10) or 2 fil-
ter driers and sight glasses may be installed at B locations (see
Fig. 10 and 11).
Select the filter drier for maximum unit capacity and minimum
pressure drop. Complete the refrigerant piping from the indoor
unit to the outdoor unit before opening the liquid and suction
lines at the outdoor unit.
INSTALL LIQUID LINE SOLENOID VALVE
It is recommended that a solenoid valve be placed in the main
liquid line (see Fig. 10 and 11) between the condensing unit
and the evaporator coil. Locate the solenoid valve at the outlet
end of the liquid line, near the evaporator coil connections,
with flow direction arrow pointed at the evaporator coil. Refer
to Table 12. (A liquid line solenoid valve is required when the
liquid line length exceeds 75 ft [23 m].) This valve prevents re-
frigerant migration (which causes oil dilution) to the compres-
sor during the off cycle, at low outdoor ambient temperatures.
Wire the solenoid in parallel with the compressor contactor coil
(see Fig. 10 and 11). This means of electrical control is referred
to as solenoid drop control.
TXV
INDOOR SENSING
COIL CKT BULB
AIRFLOW 15 DIAMS
10
MIN
DIAMS
8 DIAMS
Single Circuit Coil Piping Configuration
For Single Compressor Condensing Units
TXV
INDOOR SENSING
COIL CKT 2 BULB
AIRFLOW 15 DIAMS
10
MIN
DIAMS
8 DIAMS
TXV
SENSING
INDOOR
BULB
COIL CKT 1
15 DIAMS
AIRFLOW
10
MIN
DIAMS
Dual Circuit Coil Piping Configuration
For Single Compressor Condensing Units
Fig. 10 — Location of Sight Glass(es) and Filter Driers
Typical 569J***A/B Systems
Table 12 — Refrigerant Specialties Part Numbers
LIQUID LINE
SIZE (in.) SOLENOID VALVE (LLSV)
1/2 EF680035
5/8 EF680036
5/8 EF680036
EQUALIZER LINE
SIGHT GLASS
A LOCATION
FILTER DRIER
A LOCATION
TXV
MIN
LIQUID LINE
SOLENOID
VALVE
EQUALIZER LINE
SIGHT GLASS
A LOCATION
TXV FILTER DRIER
A LOCATION
CKT 2
SIGHT
MIN
GLASSES
B LOCATION
FILTER
LIQUID LINE
DRIERS
SOLENOID
B LOCATION
VALVE
TXV
CKT 1
8 DIAMS
MIN
LLSV COIL
EF680037
EF680037
EF680037
TXV
SENSING
BULB
AIRFLOW
15 DIAMS
10
MIN
DIAMS
TXV
SENSING
BULB
15 DIAMS
AIRFLOW
10
MIN
DIAMS
SUCTION
CIRCUIT 1
SUCTION
CIRCUIT 2
Dual Circuit Coil Piping Configuration
For Two Circuit Condensing Units
Fig. 11 — Location of Sight Glasses and Filter Driers
Typical 569J***T/U Systems
Solenoid Drop Control Wiring
Control the power to the liquid line solenoid through a Sole-
noid Valve Relay (SVR) in all units. Use part number
HN61PC005 (field-supplied, installed). 569J***A/B unit re-
quires one SVR; 569J***T/U unit requires two relays.
A unit with two liquid line solenoid valves also requires a sep-
arate control power transformer for the liquid solenoid valve
loads. Select TRAN3 transformer part number according to
unit power supply.
QTY RELAY SVR QTY -
MODEL
LSV PART NUMBER
1 1 — HN61PC005
569J***A/B
2 2 — HN61PC005
569J***T/U 2 2 — HN61PC005
LEGEND
LSV — Liquid Solenoid Valve
SVR — Solenoid Valve Relay
N/R — Not Required
Mount the SVR (and transformer TRAN3 when used) in unit
control box. Connect per wiring schematic label on unit.
Evaporator Capacity Control Liquid Line Solenoid Valve
Many older unit designs included automatic capacity controls
that sensed changes in suction pressure and could increase or
decrease compressor capacity automatically as the evaporator
load changed. Control systems were used on these units that
had the thermostat's second stage contacts control a capacity
control liquid line solenoid valve to open or shutoff a portion
of the evaporator surface without any direct connection to the
compressor circuit.
This form of system capacity staging control is not possible
with 569J models. If this installation is a retrofit for a unit that
included automatic pressure-operated unloading, check the
13
FILTER
SIGHT GLASS
DRIER
KM680004
Provided with unit,
KM680005
see Table 11
KM680005
EQUALIZER LINE
TXV
CKT 2
8 DIAMS
MIN
SIGHT
GLASSES
FILTER
DRIERS
TXV
CKT 1
8 DIAMS
MIN
TRAN3 PRIMARY V:
PART NUMBER
N/R
208/230V: HT01BD202
460V: HT01BD702
575V: HT01BD902
LIQUID LINE
SOLENOID VALVE
CIRCUIT 2
LIQUID LINE
SOLENOID VALVE
CIRCUIT 1