Bracton Subzero SZSC1800 User manual

Product Manual
Bracton Sub Zero glycol chiller
PREFACE
The manufacturer reserves the right to modify the
product and the relative technical documentation
without any obligations in relation to third parties,
and does not accept liability for any errors or
inaccuracy in the contents of this manual. This
version of the operator's manual describes the
technical characteristics of the standard production
appliance as of the date when this publication is
approved for printing.
CONTENTS
1.0 General specifications
2.0 Installation
2.1 Positioning - General
2.2 Commissioning procedure
2.2.1 Flush
2.2.2 Fill the tank
2.3 Operations
2.4 Maintenance / Cleaning
3.0 Thermostat controller
3.1 Alarms
3.2 Wiring diagrams
4.0 Troubleshooting
5.0 Checklist
1.0 General specifications
Bracton Subzero glycol chillers have been designed
to chill and maintain a set temperature for beer and
associated dispense equipment.
Bracton manufactures two main types of
commercial glycol chillers, remote and self
contained. Remote glycol chillers are supplied
without the condensing unit and designed for large
scale draught beer systems. Self contained glycol
chillers are plug and play solution including the
condensing unit. No refrigerant plumbing is
required for Bracton Subzero self contained glycol
chillers.
Bracton glycol chillers have been designed to
operate in Australian conditions.
2.0 Installation
Installation should only be performed by a suitably
qualified technician. NOTE 1: Bracton Subzero
Remote Glycol Chillers are quality checked,
pressure tested and dispatched with a nitrogen
holding charge at between 600 - 800 kPa. NOTE 2:
Bracton Subzero Self Contained Glycol Chillers are
quality checked, pressure tested and charged with
R507 refrigerant prior to dispatch.
2.1 Positioning - General
The chiller must be placed on a level surface
capable of bearing the weight of the machine
complete with coolant. The appliance must not be
placed close to direct or indirect heat sources
(ovens, stoves, radiators, etc.). The electricity and
glycol manifold points should be close to the
cooler, and positioned so that the electric cable and
water hose do not create obstacles. Do not install
area where liquid can drip onto tank.
Remote chillers
The chosen position must in any case allow
satisfactory ventilation; in particular, there must be
a gap of at least 400mm around the top for pump
ventilation. Bracton Subzero Remote Glycol Chillers
are designed to be installed indoors, either in the
cool room or back of house. For best performance
install inside the cool room.
Self contained chillers
The chosen position must in any case allow
satisfactory ventilation; in particular, there must be
a gap of at least 400mm at top and on a minimum
two sides including the condenser. Bracton Subzero
Self Contained Glycol Chillers are designed to be
installed indoors, either in the cool room or back of
house. For best performance install outside of cool
room in a well ventilated area. If installed outdoors,
a weatherproof housing must be fitted.
Revision date: 30/06/2021 Bracton Industries | www.bracton.com | [phone]

Bracton Subzero
Self contained glycol
chiller
Bracton Subzero
Remote glycol chiller
Tank capacity
80 Litres
80 Litres
180 Litres
Dimensions
SZSC1800
67 x 64 x 153cm
SZSC2800
67 x 64 x 158cm
62 x 40 x 85 - 95cm
SPK2-11 Installed
72 x 59 x 125 - 127cm
SPK4-11 Installed
72 x 59 x 138 - 140cm
Dry weight
SZSC1800 = 90Kg
SZSC2800 = 105Kg
Approx 50Kg
Approx. 100Kg depending on
configuration
Operational
weight
SZSC1800 = 172Kg
SZSC2800= 187Kg
Approx 136Kg
Approx 285Kg
Electrical input
SZSC1800
1 Ø / 10A / 240v / 50Hz
SZSC2800
1 Ø / 15A / 240v / 50Hz
1 Ø / 10A / 240v /50Hz
1 Ø / 10A / 240v /50Hz
Thermostat
Carel PJ Easy
Pump(s)
SPK 2-11
Single pump option only
SPK 2-11
SPK 2-15
SPK 4-11
Single or dual pump
Cooling
Capacity
SZSC1800
@32C - 10 SST = 2kW
SZSC2800
@32C - 10 SST = 3kW
1.8 - 2.7kW
1.8 - 16kW
Refrigerant
R507
R22, R134a, R404a
Refrigerant
connections
Suction line = ⅝”
Liquid line =⅜”
Suction line = ⅝”
Liquid line =⅜”
1.8 - 10kW
Suction line = ⅞”
Liquid line =⅜”
>10 - 16kW
Suction line = 1 ⅜”
Liquid line = ½”
Revision date: 30/06/2021 Bracton Industries | www.bracton.com | [phone]

2.2 Commissioning procedure
Inspect for damage, if any damage evident contact
bracton service centre for advice.
Remote systems
Install in accordance with Australia and New
Zealand Refrigerant handling code of practice
2007, Part 1 — Self-contained low charge systems.
NOTE: Units are delivered with a holding charge of
600-800 kPa of nitrogen. Pressure test remote
systems if no holding charge, report back to
manufacturer prior to installing. No warranty will be
available if this step is missed.
Brazing
All copper connections must brazed with flowing
dry nitrogen within through the system to prevent
oxidation build up.
Charging
System is to be charged in accordance with AS/NZS
1677.2:1998 Section 6.1: Charging and discharging
refrigerant
Test and tag
On completion of installation test and tag in
accordance with AS/NZS 3760:2010
Insulating
All outlet points and lines are to be appropriately
insulated to prevent condensation formation. For
more information contact the Manufacturer.
2.2.1 Flush
Flush the system with fresh potable water, ensure
no debris is in tank or water/glycol lines.
2.2.2 Fill the tank
Remove the cover and fill the tank with a 30%
mixture of propylene glycol to 70% distilled water.
Standard propylene glycol may be used, however
for the ultimate protection consider using Bracton
Long Life Propylene Glycol to protect the
reticulation system for up to five times longer than
standard glycol. NOTE: ethylene glycol is toxic and
under NO circumstances should be used.
Remote
Glycol Chiller
Tank
size
80 Lt
Propylene glycol 24L
Distilled water 56L
Self Contained
Glycol Chiller
Tank
size
180 L
Propylene glycol 54L
Distilled water 126L
Note 1: one litre of propylene glycol = 1.09 Kg,
therefore 24Lt of propylene glycol = 26.6Kg
Note 2: calculation above to include charging
python water lines and fonts.
To verify concentration of glycol / water mixture,
place a couple of drops of the mixture onto a
refractometer sight and view the concentration
reading, which should be approximately 21 bx.
2.3 Operations
Safety Do not allow anyone to operate the machine
unless suitably trained. Keep the machine in good
working order and do not allow any modifications
to it unless these have been authorised by the
manufacturer.
Electrical Safety Always disconnect the machine
from the electricity supply before doing any work
on it, to prevent damage and health hazards.
General use The use of the chiller for any purposes
other than those for which it was designed is not
recommended. Likewise, its use in any way other
than that indicated in this manual is forbidden.
This machine is not intended to be used by people
(including children) with reduced physical or
sensory capacities, or with a lack of experience and
knowledge, unless under supervision and with the
instructions of someone responsible for their
safety.
For the purposes of your safety, and in accordance
with the current legislation, any repair operations
on the machine must be carried out by the Service
Centre or approved contractor.
Revision date: 30/06/2021 Bracton Industries | www.bracton.com | [phone]

●Do not tamper with the internal
components; if they do not work well,
contact the Service Centre or approved
contractor
●Do not place any objects on the chiller
●Do not place the chiller on top of any other
object.
●Do not use liquids other than those
indicated.
●If you believe the chiller to be damaged,
contact the Service Centre or approved
contractor.
2.4 Maintenance / Cleaning
Electrical Safety Always disconnect the machine
from the electricity supply before doing any work
on it, to prevent damage and health hazards.
Authorised Technical Service Only technical staff
who are skilled refrigeration technicians, or with
expertise in cooling systems, may carry out work on
the machine. All wiring and plumbing components
must comply with national and local legal
requirements (when replacing components, use
only genuine parts certified by Bracton).
Coolant mixture The coolant mixture should
checked quarterly to ensure concentration ratio of
propylene glycol to distilled water is appropriate.
ie. Reading of 21 brix on the refractometer,
indicating a 30:70 propylene glycol: distilled water.
Refer to section 2.2.2 for more information.
3.0 Thermostat controller
Bracton programs thermostats prior to dispatch
with the following settings.
Parameter
Setting
st
set point
- 2.5oC (minus)
rd
temperature
differential
1.5 oC
AH
high temperature
alarm
8.0 oC
AL
low temperature
alarm
- 8.0 oC (minus)
For more information visit www.carel.com
3.1 Alarms
3.2 Wiring diagrams
Subzero self contained glycol chiller
Subzero remote glycol chillers
Revision date: 30/06/2021 Bracton Industries | www.bracton.com | [phone]

4.0 Troubleshooting
Problem
Cause
Solution
Warm
beer
Glycol mixture
too weak
Glycol heat
exchanger
Glycol pump
failure
Tank on
defrost
Capacity
exceeded
Other
Increase glycol
concentration
Check thermostat
parameters and
probe
Replace pump
Change thermostat
parameters
Reduce load on
tank.
Contact bracton
service centre
No beer
flow
No beer gas /
air
compressor
failure
Keg handle up
Frozen beer
lines from
glycol mixture
to cold
Check gas board,
replace gas, check
air compressor.
Push keg handle
down
Check set
temperature/
thermostat, check
probe, solenoid.
Noisy
pump
Pump ware
Check fan seal or
replace pump
5.0 Checklist - Remote
❏Evacuate, charge with nitrogen to 600 -
800kPa and leak check all refrigeration
components.
❏Liquid line and glycol solenoid installed in
the correct flow direction.
❏TX valve refrigerant matches unit.
❏TX valve sensing bulb is secured tightly and
in correct position, TX valve capillary not
rubbing on anything.
❏Taped TX bulb.
❏Turn on unit, check thermostat operates
and solenoid energise.
❏Glycol probe in correct position and suction
line probe checked for sensor tightness.
Confirm operation of glycol probe, check
for temp change.
❏Check pump(s) operate.
❏Remove rubber grommet from pump neck
❏Check wiring to ensure no internal
insulation is exposed.
❏Branding and Serial number correctly
positioned.
❏Supply leveling legs
❏Tank area clean.
❏Supply manual.
❏Lid and body insulation is installed and the
unit is fully sealed.
❏Check glycol return tube is fitted.
Assembly technician: _________________
Date: ________________
Revision date: 30/06/2021 Bracton Industries | www.bracton.com | [phone]