Bryant 569J Series Installation, Start-Up And Service Instructions Manual page 18

Solenoid drop control wiring: Control the power to the
liquid line solenoid through a Solenoid Valve Relay (SVR)
in all units. Use part number HN61PC005 (field- - supplied,
installed). 569J***A/B/G/H unit requires one SVR;
569J***D/E/F unit requires two relays.
A unit with two liquid line solenoid valves also requires a
separate control power transformer for the liquid solenoid
valve loads. Select TRAN3 transformer part number
according to unit power supply.
Qty Relay SVR
Model
LSV Qty---Part Nbr
1 1 --- HN61PC005
569J***
A/B/G/H
2 2 --- HN61PC005
2 2 --- HN61PC005
569J***D/E
569J*12F 2 1 --- HN61PC005*
LSV: Liquid Solenoid Valve
SVR: Solenoid Valve Relay
N/R: Not Required
N/R #: Not Required / Factory Installed
*: Install as SVR---2 (SVR---1 is factory ---installed)
Mount the SVR (and transformer TRAN3 when used) in
unit control box. Connect per wiring schematic label on
unit, see Fig. 29 thru Fig. 31.
NOTE: TRAN3 is provided with the HGBP factory
installed option for 569J*12F units.
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 existing thermostat and liquid
solenoid valve. When found, convert the evaporator
second stage solenoid control into a drop- - solenoid
control. Use the two SVR relays and transformer as
required on 569J***D/E/F models (above); wire the SVRs
and transformer per two solenoid valve systems as shown
in Figs. 18 and 31.
Selecting an Accumulator –
Because all 569J models use scroll compressors, an
accumulator is not required. If an accumulator is to be
added, check the accumulator manufacturer's literature
carefully for indication of its suitability for use with
R- - 410A; look for minimum working pressure of 200 psig
(1380 kPa). Select the accumulator first on the basis of its
cataloged minimum capacity (tons) to ensure oil return from
the accumulator, then on tube size or holding capacity.
Make Piping Connections —
Piping connections at the 569J unit are ball valves with
stub tube extensions. Do not open the unit service valves
until all interconnecting tube brazing has been completed.
The stub tube connections include
fittings with Schrader valve cores (see Fig. 11). Before
making any brazed connections to the unit service valves,
remove both Schrader valve caps and cores and save for
re-installation. Connect a source for nitrogen to one of
these service fittings during tube brazing to prevent the
TRAN3
formation of copper oxides inside the tubes at brazed
Primary V:Part Nbr
joints.
N/R
When connecting the field tubing to the 569J service
208/230V:HT01BD202
460V: HT01BD702
valves, wrap the valves in wet rags to prevent overheating.
575V: HT01BD902
Pressure-test all joints from outdoor unit connections over
N/R #
to the evaporator coil, using nitrogen as pressure and with
soap-and-bubbles.
When pressure-testing is completed, remove the nitrogen
source at the outdoor unit service valves and re-install the
two Schrader valve cores. Torque the cores to 2-3 in-lbs
(23-34 N-cm).
Evacuation/Dehydration —
Evacuate and dehydrate the connected refrigeration
system(s) (excluding the 569J unit) to 500 microns using a
two-stage vacuum pump attached to the service ports
outside the 569J service valves, following description in
GTAC II, Module 4, System Dehydration.
This unit is designed for use with Puron (R- - 410A)
refrigerant. Do not use any other refrigerant in this system.
18
Factory
High-Flow
Access Port
Service Valve
with Stem Cap
Fig. 11 - - Typical Piping Connection Assembly
WARNING
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
R
Puron (R- - 410A) refrigerant systems operate at
higher pressure than standard R- - 22 systems. Do not
use R- - 22 service equipment or components on Puron
refrigerant equipment.
1
/ -in SAE service
4
Field Service
Access Port
(Schrader core)
Sweat
Connection
C150028