Step 6 - Complete Refrigerant Piping Connections - Bryant 569J Series Installation, Start-Up And Service Instructions Manual

Step 6 — Complete Refrigerant Piping Connections
IMPORTANT: Do not bury refrigerant piping
underground.
IMPORTANT: A refrigerant receiver is not provided
with the unit. Do not install a receiver.
Provide Safety Relief —
If local codes dictate an additional safety relief device,
purchase locally and install locally. Installation will
require the recovery of the factory shipping charge before
the factory tubing can be cut and the supplemental relief
device is installed.
Model 568J***D/E/F has two separate refrigeration systems.
If required, each circuit will require a field-supplied/installed
supplemental relief device.
Check 569J Model with Evaporator Coil Connections —
Confirm before installation of unit that the evaporator coil
connections are consistent with this 569J model. See
Table 3 on page 10.
Insulate Suction Lines —
Apply closed-cell tubular insulation to all suction lines
between evaporator coil connection and 569J unit's suction
service valve.
569J***D/E/F Piping Connections —
The 569J***D/E/F's two circuits are designated Circuit 1
and Circuit 2. Circuit 1 is controlled by the thermostat's Y1
(or TC1) contact and will be the first circuit on and last
circuit off. Circuit 2 is controlled by the thermostat's Y2 (or
TC2) contact and this circuit is always the "lag" circuit.
See Fig. 7 for location of Circuit 1 and Circuit 2 service
valves and field piping connections. Circuit 1 is on the
right-hand side of the service valve compartment; Circuit 2
is on the left.
When a single piece evaporator coil with two separate circuits
is connected to a 569J***D/E/F, the lower coil circuit should
be connected to the 569J***D/E/F's Circuit 1 so that the
evaporator's lower coil segment is first-on/last-off (to avoid
re-evaporation of condensate on dry lower coil segments).
CKT
2
CKT
1
Fig. 7 - - 569J***D/E/F Service Valve Locations
Circuit 1
Connections
Circuit 2
Connections
C10912
Plan the Circuit 1 and Circuit 2 tubing segments carefully,
mark each segment and check constantly as piping
systems are assembled to avoid piping errors.
569J***D/E/F unit cannot
single-circuit/tandem system.
Final Tubing Check. 569J***D/E/F —
Before completing the field piping connections to the
569J***D/E/F unit service valves, confirm that the
suction line to the indoor coil's first- - on/last- - off circuit
(and its companion liquid line) are correctly identified as
Circuit 1 use for the 569J***D/E/F unit. If a suction riser
is required, it must be in Circuit 1.
Connecting 524J to 569J***D/E/F: The 524J fan coil in
sizes 12, 14 and 16 is a face-split coil design that also has its
circuits designated as 1 and 2. See Fig. 8. Note that the
lower coil segment changes as the arrangement of the 524J
changes. In a vertical arrangement, the 524J's lower coil
segment is segment 2; this segment should be connected to
the 569J***D/E/F's Circuit 1. In a horizontal arrangement,
the 524J's lower segment is now segment 1; this segment
should be connected to the 569J***D/E/F's Circuit 1.
Note that refrigerant suction piping should be insulated.
524J Cooling
Arrangement Stage
Y1
Vertical
Y2
Y1
Horizontal
Y2
1
2
FIRST ON/LAST OFF = 2
VERTICAL INSTALLATION
1
FIRST ON/LAST OF F = 1
HORIZONTAL INSTALLATIO N
Fig. 8 - - Typical Evaporator Coil Connections (524J)
16
be field-piped as a
524J Coil Connect to
Segment 569J***D/E/F
2 Circuit 1
1 Circuit 2
1 Circuit 1
2 Circuit 2
2
C10071