Carbo-Draught MAX Manual - Fizz Dispense Optimization Group

Carbo-Draught MAX Manual - Fizz Dispense Optimization Group
Installation, Operation,
and Service Manual
Carbo-Draught Max
Section 1 Introduction
The Carbo-Draught Max gas dispense system extracts nitrogen (N2) from ambient
air, blends it with carbon dioxide (CO2) and supplies the mixed gas to a beer
dispense system. As a component of a properly designed and maintained draught
beer system, the Carbo-Draught Max assures brewery quality beverage presentation
while it eliminates excessive foaming and wasted beer.
The Carbo-Draught Max uses proven Pressure Swing Adsorption (PSA) technology
with a Carbon Molecular Sieve (CMS) to separate N2 from the atmosphere and store
it at a purity level of at least 99.8%. It uses a McDantim blender to combine the N 2
with CO2 from another storage vessel into CO2 / N2 “beer gas” blend ratios of 25% /
75% and 60% / 40%. The blends are consistent and accurate to within 2% CO 2 of
each blend ratio. The Carbo-Draught Max also has a pure N2 supply port and space
provisions for a third blend ratio.
This manual contains the information necessary for the correct use of the CarboDraught Max unit.
Should any questions arise regarding safe and proper
installation, operation or maintenance of the Carbo-Draught Max, contact the
supplier before proceeding.
Warning: Ensure that all personnel involved in the installation, operation and
maintenance of the Carbo-Draught Max unit, as well as those persons who
will act as supervisory personnel, have read and fully understand the
instructions before attempting to install, operate or perform maintenance on
this Carbo-Draught Max unit.
Page 2
Section 2 – Contents
Section 1
page 2
Section 2
Contents of the Operating Manual
page 3
Section 3
Alert Symbol Definitions
page 4
Section 4
Safety Warning
page 4
Section 5
General Information,
System Schematics
pages 5, 6
Emergency Procedure
in the Event of a Loss in System Pressure
page 7
Section 7
System Leaks
page 7
Section 8
Product Specifications
page 8
Section 9
Unpacking the Carbo-Draught Max
page 9
Section 10
Installation and Operation
pages 10 -15
Section 11
page 15 -17
Section 12
Parts Identification and Parts List
pages 18 - 20
Section 13
page 20, 21
Section 14
Service and Parts
page 22
Section 15
P & I Diagram / Electrical Wiring Diagram
page 23
Section 16
page 24, 25
Section 6
Page 3
Section 3 – Alert Symbols Used Throughout This Manual
The WARNING symbol draws attention to an operating
procedure or practice that can cause injury if it is not observed or performed
correctly. Do not continue past a WARNING symbol until you have fully
understood or satisfied the indicated conditions.
CAUTION: The CAUTION symbol draws attention to an operating procedure
or practice that can damage the unit if it is not observed or performed
correctly. Do not continue past a CAUTION symbol until you have completely
understood or satisfied the indicated conditions.
NOTE: The NOTE symbol draws attention to information that is especially
important to an operating procedure or a practice that is advisable to perform
correctly or observe correctly, but that cannot damage the unit.
Section 4 - Safety Warning
Do not operate the Carbo-Draught Max unit until the information contained in
this document has been read and understood by all personnel concerned.
The unit should be connected to an electrical supply in accordance with local
safety regulations.
Ensure that the rating plate corresponds to the
supply voltage. Ensure that the unit is grounded.
Nitrogen (N2) & carbon dioxide (CO2) are not poisonous gases but in a
concentrated form present a risk of asphyxiation. The Carbo-Draught Max
unit produces a small flow of mixed gases that quickly disperse in the
atmosphere. However, do not directly inhale any gases produced by the
Carbo-Draught Max unit.
Before service or maintenance is performed on the Carbo-Draught Max unit,
the electrical supply must be switched off and the main electrical lead
disconnected. All personnel handling, using or maintaining the CarboDraught Max unit must employ safe working practices and observe all
relevant local health and safety regulations.
Page 4
Section 5 - General Information
1.) CO2 is supplied from a bulk storage vessel. The Carbo-Draught‟s generator
produces N2 by separating it from ambient air using a Carbon Molecular
Sieve (CMS). The generated N2 is stored in a receiver vessel.
While producing N2 the unit will depressurize approximately every four
minutes, resulting in an audible pulse of gas, which is normal.
Schematic A
To draught system
Pure N2
To soda system
to storage
CO2 Storage
Page 5
N2 Storage
Schematic B
The Carbo-Draught Max unit is designed to produce pure nitrogen and two
different mixtures of carbon dioxide (CO2) and nitrogen (N2) simultaneously at
pre-determined ratios of 25% CO2 / 75% N2 and 60% CO2 / 40% N2. It has
capacity for a third blend.
The Carbo-Draught Max unit is classified as non-hazardous for transportation
purposes and non-flammable for fire regulations.
Any interference with the calibration warning labels will invalidate the CarboDraught Max unit warranty and may incur costs for re-calibration.
Page 6
Section 6 – Emergency Procedure in the Event of
System Pressure Loss
Check the on/off switch (16 on Schematic B) on the bottom of the CarboDraught Max unit to ensure it is ON and the green LED (1 on Schematic B) is
illuminated. If the green LED is not illuminated, check that the power cord is
securely connected to the unit and to the power supply outlet and that the
external fuse or circuit breaker has not “tripped.”
Check the keg tap couplings to be sure they are secure.
Check the CO2 inlet gauge (location 18 on Schematic B) to verify the supply
pressure is at least 60 psig (4.1 barg). If the gauge pressure is low, switch to
the regulated back-up cylinder (if equipped). With assistance from your service
supplier, determine and correct the cause of low CO2 pressure.
Check the N2 supply pressure (see Schematic A, and 3 on Schematic B) to
verify that it is above 60 psig (4.1 barg). If the pressure is below this figure,
switch to the regulated back-up cylinder (if equipped) and verify back-up
pressure (4 on Schematic B). Call for assistance from your supplier to
determine and correct the cause of low N2 pressure.
If either the CO2 supply or the N2 supply stops, the blender within the CarboDraught Max will stop supplying gas to the beer dispense system.
Blend production will resume when gas pressure is restored.
If either of the gas input supply pressures drops but stays above keg pressure,
the blender will continue to produce blended gas, but at a corresponding slower
rate and with less blend accuracy.
Section 7 – System Leaks
If a loss of pressure is due to obvious leakage or rupture of a gas supply line,
take the following actions:
Do not enter the area of leakage until it is safe to do so (refer to supplier
safety and data sheets).
Ensure the area is well ventilated before entering.
Turn off all cylinders if they are accessible and are away from the
area of leakage.
Switch off the Carbo-Draught Max unit and contact your service supplier.
Page 7
Section 8 – Product Specifications
Carbo-Draught Max (Part No. 99003)
Height = 35 in (889 mm)
Width = 21 in (533 mm)
Depth = 10 in (254 mm)
Total Weight:
Approx. 110 lb (50kg)
Cabinet Materials:
Steel, powder coated white
Electrical Power Supply:
115 V ac 60 Hz
Ambient Temperature:
36 to 950 F (2 to 350 C)
N2 Storage Vessel Size:
35 gal (approx. 132 liters)
N2 Flow Rate:
Approximately .2 cfm (5 liters / min)
Nitrogen Purity:
>99.8% (<0.2% oxygen)
N2 Storage Generation
Cycle Start Pressure:
130 psig (9.0 barg)
Max N2 Storage (Generation
Cycle Stop) Pressure:
138 psig (9.5 barg)
Stored N2 Volume
@ Max Press:
44.0 ft3 (approx. 1246 liters)
CO2 Gas Requirement:
90 psig (6.2 barg)
Gas Storage Inlet and Outlet
Bulkhead Ports:
1/4” NPT female
Mixed Blends (CO2 / N2):
B1 = (25% / 75%), B2 = (60% / 40%)
Blend Outlet Pressure:
Adjustable / Normal running = 72.5 psig (5 barg)
Blend 1 & 2 and N2
Dispense Gas Outlet Port:
3/8” push-in
(for 3/8” x 1/4" stemmed hose barb)
Page 8
Section 9 - Unpacking the Carbo-Draught Max
The packing box contains, as shown below in the order of installation, a mounting
back-plate, one Carbo-Draught Max unit, a compressor mounting plate and one
compressor (in a cardboard box). Included is a manual and a bag containing a power
cord, wall anchors with mounting bolts, compressor mounts and stemmed hose barbs.
Be sure that two people remove the Carbo-Draught Max from the box.
If any of the items are in a damaged condition, request an immediate inspection by
the carrier. If any items are missing, please contact Fizz.
Carbo-Draught Max unit
Compressor Plate
Page 9
Section 10 - Installation and Operation
Please read this entire section and become familiar with the installation
requirements before proceeding with the installation.
Mount the Carbo-Draught Max onto the Wall
The Carbo-Draught Max is installed in stages to minimize the weight lifted during the
wall mounting procedure. The location for mounting the Carbo-Draught Max unit
should be indoors in an area that is well ventilated and where the ambient
temperature is between 360F and 950F. Ensure that the wall or supporting member of
the wall is capable of bearing 110 lb (50 kg). The mounting location must have
access to a 115V ac electrical supply with a three-pin socket. Ensure that the
electrical supply circuit has adequate capacity for consistent power supply to the
compressor motor. Ensure also that a properly regulated CO 2 source and N2 storage
tank(s) will be convenient to the location of the Carbo-Draught Max unit (Schematic
A). Make sure the mounting position is high enough to allow access to the bottom of
the unit for making connections and viewing operational displays.
Note: The Carbo-Draught Max must be mounted vertically.
The attachment means must be suitable for the wall construction and
capable of supporting the full 110 lb. weight of the Carbo-Draught Max unit.
Two people are needed to lift and mount the unit. PLEASE WEAR SAFETY
Mount the back-plate onto the wall.
Using a (bubble) level, determine and mark a horizontal line along which the
back-plate of the Carbo-Draught Max unit will be secured to the wall.
Ensure there are no electrical devices below the Carbo-Draught Max
unit. Depending on ambient humidity, condensate (water) may drip from
the unit.
The use of noxious chemicals or machinery that produces fumes is not
permitted within a twenty-foot radius of the Carbo-Draught Pro unit.
For proper anchorage to a framed wall make sure that the unit is
fastened to two wall support members (studs) using a mounting board if
While holding the back-plate in the desired mounting
position along the horizontal guide-line, mark the four
mounting points. Drill corresponding pilot holes for
(3/8” x 3”) lag screws. (If mounting the unit to a
concrete (block) wall, use appropriate anchors.)
Bolt the back-plate securely to the wall.
Page 10
Hang the Carbo-Draught Max unit onto the back-plate.
Remove the bubble wrap from the Carbo-Draught Max; then remove and
save the cabinet cover‟s (8) mounting screws.
Remove the cabinet cover, being careful to disconnect the grounding wire
from the inside of the cover.
Hang the Carbo-Draught unit onto the back-plate
by engaging the unit‟s hook-tabs with the raised
portions of the back-plate. Note: The photo
shows a reverse angle view of the unit hooking
onto the back-plate.
Hook Tabs
Install the Compressor
Mount the compressor plate to the threaded
studs on the back-plate using the nuts and
washers supplied.
Screw the anti-vibration mounts into the
compressor feet from the bottom. Place the
compressor onto the mounting plate,
matching its anti-vibration mounts to the
holes in the mounting plate. Secure the
compressor to the mounting plate using the
¼” nuts and washers supplied.
Connect the braided stainless steel air supply tube
to the compressor outlet and to the copper air
supply coil.
Connect the air intake filter tube to the air intake
elbow fitting on the compressor.
Page 11
Connect the compressor‟s three-pin electrical plug
with its mating connector in the Carbo-Draught Max.
Secure the wires with the cable tie provided on
the back of the cabinet to prevent them from
touching the compressor.
Install External Isolation Valves and N2 Storage and Back-Up Tanks
Supplies To Have On Hand (not supplied with Carbo-Draught Max unit):
- Reinforced Beverage Tubing 1/4” ID
- Hose Clamps (Oetiker #13.3) for 1/4” tubing
- Hose Barb Fittings (1/4” x 1/4 NPT)
- Isolation (Ball) Valves (1/4 MPT x 1/4 FPT)
(One recommended in each line to facilitate
pressure tests and to isolate components for
service and switchover)
- Pressure Gauge *, 0-160 psig (1/4” CBM)
- Street tee (1/4” NPT)
(For connection of an optional CO2
supply line gauge)
- Hose Barb Tees (1/4”)
(For in-line connection of optional
back-up gas cylinders and for “splitting”
blend lines if necessary)
- ½” PTFE thread sealant tape
(Fizz P/N 14010)
(Fizz P/N 13001)
(Fizz P/N 13010)
(Fizz P/N 13020)
(Fizz P/N 13100
(Fizz P/N 13021)
(Fizz P/N 13030)
* Fizz
recommends the use of a pressure gauge at the CO2 inlet port (Schematic
A) to assure that at least 90 psi supply pressure is being delivered to the unit.
CO2 pressure is regulated internally to ensure blend purity.
Connect the “N2 To Storage” port of the Carbo-Draught Max to the inlet port on
the N2 storage tank using ¼” I.D. beverage tubing, hose barb fittings and
stepless clamps. Installation of an „in-line‟ isolation valve is recommended.
The N2 storage tank is fitted with an isolation valve. Open this valve.
Connect the outlet port of the N2 storage tank with the “N2 From Storage” port on
the Carbo-Draught Max using ¼” I.D. beverage tubing, hose barb fittings and
stepless clamps. Installation of an in-line isolation valve is recommended either
Page 12
at the outlet port of the N2 storage tank or the “N2 From Storage” port on the Max.
(The N2 storage tank is already equipped with this isolation valve.)
Close this valve. (The Carbo-Draught Max is equipped with a bulkhead
connection port, switchover valve and pressure gauge for an optional, regulated
reserve N2 cylinder. Ensure that the switchover valve is in the “N2 Duty
Pressure” position.) If a back-up cylinder is connected, its gas supply valve
should be turned off.
Attach an „in-line‟ isolation valve to the “CO2 Inlet” port on the Max (between the
recommended pressure gauge and the Max unit.) Close the valve.
Check that the Blend 1, Blend 2, and pure N2 outlet
ports on the Carbo-Draught Max are closed. The red
handles on the blend supply pressure control
modules are closed when in the downward position
and the gauges indicate no pressure. Now the unit
is ready to begin N2 generation for the storage tank.
Note: The Carbo-Draught Max unit will require about
4 hours to fully pressurize an “empty” storage tank to
approximately 138 psig. To save time, Fizz recommends that the storage tank
be pre-pressurized to about 120 psig using a regulated supply of N2 from a highpressure cylinder. Complete the storage tank pressurization with the CarboDraught Max to assure that the system is performing properly and is ready for
service. It should pressurize at a rate of about 10 psig per 15 - 20 minutes.
Electrical Power-Up
The unit must be connected to a suitable 110V ac grounded electric supply
in accordance with local safety regulations. Ensure the rating plate
corresponds to the supply voltage.
Ensure there is power at the 3-pin (grounded) socket. Using the power cord supplied
with the Carbo-Draught Max, connect the unit to the power supply. Switch the
ON/Off Main Switch to the “ON” position and ensure that the green LED illuminates.
Note: The amber LED also illuminates indicating that the system is in the charge
mode. The fan motor will start immediately and after approximately two minutes the
on-board compressor will start. The nitrogen generation process will consist of a
compressor run time of about 130 seconds alternating with an exhaust time of about
120 seconds. An audible pressure release will indicate that the unit is producing N 2.
This audible cycle will continue until the N2 storage vessel is fully pressurized to
approximately 138 psig.
Locate and Connect the CO2, Blended Gas, and Pure N2 Lines
Page 13
While the N2 storage tank is being pressurized, determine a connection point to the
main CO2 supply line. (Ensure that the CO2 supply pressure is at least 90 psi.)
Determine the blend gas supply line connection points to the draught beer system
and to the pure N2 use connection point as needed. Final connections and leak
testing will cause a brief interruption of service to the beer faucets and should be
accomplished when the establishment is closed or when no beer is being poured.
Make the CO2 and the blend gas supply line connections after the N 2 storage tank is
fully pressurized to minimize draught system downtime.
Be sure the gas supply (pressure) from the CO2 storage vessel is turned off
or restricted at the connection point before making the CO2 connection.
Connect the CO2 inlet port on the Carbo-Draught Max to the CO2 supply line
connection point using beverage tubing, hose barb fittings and stepless clamps.
Run the 1/4” ID blend-gas supply lines from the Carbo-Draught Max to the beer
gas connection points. Connect the lines to the Carbo Draught‟s blend supply
pressure control modules using the stemmed (3/8” x 1/4") hose barbs supplied.
Color-coded supply lines are recommended to make sure that Blend 1 (25% CO2
/ 75% N2) and Blend 2 (60% CO2 / 40% N2) are routed to the correct beer types.
For example, red-line beverage tubing may be used for Blend 1 and green-line
beverage tubing used for Blend 2.
Relieve pressure at the beer gas connection points. Avoid depressurizing
the kegs. Connect the blend-gas supply lines to the designated beer gas
connection points.
Restore the main CO2 supply pressure. Open the “CO2 inlet” valve on the
Carbo-Draught Max. Open the “N2 From Storage” valve. All isolation valves
except the blend outlet isolation valves should now be open.
Observe pressure gauges and examine all connections for leaks. When the N 2
storage tank is fully pressurized and the N2 pressure gauge remains steady, the
Carbo-Draught Max should be in the “rest” mode (amber light off) and the
compressor will be off. If the N2 pressure falls while the blend outlets are closed
this indicates leakage in the upstream connections or within the Carbo-Draught
Max. Locate and correct the leak(s).
To check for blend-gas leaks to the beer system, open the red valves on the
blend-gas pressure control modules. Pressurize the blend gas supply lines by
adjusting the regulators to the proper beer system specifications. Ensure that no
beer is being dispensed. The N2 supply pressure gauge may show a small
pressure drop at first but should stabilize. Blend-gas line pressure should be
stable at the pressure set by the beer system installer. If pressure continues to
drop, locate and correct the leak(s) in the draught system.
(Ensure that all beer tap couplings are secure.)
Page 14
The beer-gas system may have leaked before the Carbo-Draught Max was
installed. Leaking keg tap couplings are common. The leak(s) likely go unnoticed
(except through excessive gas consumption). If that is the case, the CarboDraught Max‟s compressor may run excessively or appear to be unable to keep
the N2 storage tank adequately pressurized during off-business hours. Check all
gas line connections, including the keg couplings, for leaks.
Install the Front Cover
Switch off the main power supply to the Carbo-Draught Max unit.
Connect the ground lead from the Carbo-Draught Max unit to the front cover.
Locate the tab along the top back edge of the cover and hook the cover onto the
top of the Carbo-Draught Max‟s mainframe.
Gently ease the cover down onto the main frame. Secure the cover using the (8)
screws provided.
Switch on the Carbo-Draught Max unit.
Section 11 - Maintenance
Failure to perform specified service may result in damage to the Carbo-Draught
Max unit and may invalidate any warranty. Use only genuine parts as supplied
by your Carbo-Draught Max supplier.
Before performing maintenance, turn off the Carbo-Draught Max unit and
disconnect the main power supply.
(Note: the green, main power-on light extinguishes).
Annual Filter Service Requirement
The quality and reliability of the Carbo-Draught Max
unit is maintained through preventive maintenance
performed on a scheduled, regular basis. Although the
frequency of this maintenance is determined by
particular use conditions, Fizz recommends filter
changes at least every twelve months. Keep a written
record of all maintenance activity.
Air Intake Filter
Coalescing Filter
Silencer Filter Assembly
Page 15
Filter Replacement (Use Filter Kit P/N 97209)
The system must be depressurized before replacing the filters.
If the system is in the “charge mode” (green and amber LED illuminated) shut off
the unit‟s power switch. Close the „CO2 Inlet‟ and „N2 To Storage‟ isolation valves.
Depressurize the system by turning the power switch on again for 20 seconds
allowing the unit to exhaust (depressurize.) Turn the power off and proceed with
the filter change.
If the system is fully charged (amber LED off) turn off the power, close the „CO2
Inlet‟ and „N2 To Storage‟ isolation valves and depressurize the system by slowly
and carefully turning out the tube nut at the bottom of the coalescing filter housing
bowl (Figure 1a). Allow the pressure to release slowly and completely.
Proceed with the filter change.
Be sure the electrical power supply is shut off before performing any service
on the Carbo-Draught Max.
Replace the Air Intake Filter:
Pry just the cap of the filter housing downward separating it from the
filter housing.
Pull the foam filter element from the housing and dispose of the element.
Fit the replacement foam filter element by pushing it into the housing
Replace the housing cap
Replace the Coalescing Filter: (Figure 1)
Disconnect the solenoid valve from the bottom of the filter housing by unscrewing the
tube nut counter-clockwise. (Figure 1a, see arrow)
Unscrew the filter-housing bowl counter-clockwise. (Figure 1b)
Page 16
Unscrew the filter counter-clockwise and discard it. (Figure 1c)
Align the replacement filter onto the mounting spindle and screw it in clockwise.
(Figure 1d)
Replace the housing bowl by screwing it clockwise until it is hand-tight.
(Figure 1e) Do not use a wrench or other tools that may cause damage to
the bowl.
Before refitting the solenoid valve to the filter housing (Figure 1a) replace the silencer
filter assembly.
Replace the Silencer Filter Assembly: (Figure 2)
Unscrew the silencer (counter-clockwise) from the solenoid valve. (Figure 2a)
Dispose of the silencer. Notice that the silencer is comprised of a blue, porous plastic
“housing” with a sintered brass insert (Figure 2b). Both pieces are replaced and
therefore do not need to be separated unless for disposal reasons.
Screw the replacement silencer onto the solenoid valve‟s bottom port until it is handtight. (Figure 2c)
Reattach the solenoid valve to the bottom of the filter housing by carefully aligning the
tube nut with the solenoid fitting and screwing it clockwise into the fitting (Figure 2d.)
Page 17
Section 12 - Parts Identification
Carbo-Draught Max
Part No. 99003
22 19
View Behind Gas
Blend Module Panel
Bottom View
Page 18
P/N 99003
Controls system operation
Turns unit off and on
Brings fresh air into the system for
cooling and compressor
Delivers ambient air to CMS column
Printed Circuit Board
w/mounting hardware
Main Power Switch
Cooling Fan Assembly
w/mounting hardware
Compressor w/fittings
and mounting hardware
Solenoid Valve Assembly
w/mounting hardware
Gas Blender w/fittings
Relief Valve
Pressure Gauge
Back Pressure Regulator
with Gauge
Check Valve
Protects internal electrical components
Blender lines
Filters compressed inlet air / drains
accumulated moisture
100mA Fuse
(on circuit board)
12.5A Fuse
(on circuit board)
6 mm OD Translucent
PTFE Tubing
Coalescing Filter
Housing Assembly
Copper Cooling Coil
Cycles closed and open to pressurize
and exhaust CMS column
Combines N2 and CO2 gases into
proper proportions for dispensing
Protects N2 gas circuit from overpressurization
Indicates pressure in N2 storage and
back-up tanks
Controls release of generated N2 into
storage supply circuit
Prevents back flow of N2 gas during
Protects the circuit board
Cools compressed air before it enters
CMS column
N2 generation and pressure circuit lines
6 mm OD Translucent
White PTFE Tubing
CMS column
w/mounting Hardware
Cabinet Cover
(not shown)
4 mm Translucent White
PTFE Tubing
SS Mesh Compressor
Discharge Pipe
N2 Manifold Block
Bulkhead Connectors
¼”Female NPT
Power Socket
Exhaust Silencer Filter
Separates N2 from compressed
ambient air supply
Protects system components
N2 pressure gauge tubing
Compressed air line from compressor
to check valve connector
Connection point for N2 gauge and
internal tubing, and bulkhead port
CO2 inlet, N2 inlet and outlet
connection for storage and back-up
Power cord attachment point
Quiets air expulsion and diffuses
moisture from coalescing filter bowl
Page 19
Air Intake Filter Element
CO2 Regulator
(Not shown; located
behind module panel)
10A Main Power Fuse
Pressure Control Module
(Dispense Gas Outlets)
Filters incoming air to compressor
Pre-set at 87 psig to regulate incoming
CO2 pressure
Protects electrical components of unit
(Quantity includes one spare fuse)
Regulates dispense gas pressure to
desired specifications
Filter Element Kit
Installation Kit
C.D.M. Manual
Includes Air Intake Filter, Coalescing
Filter, and Silencer Filter for
scheduled maintenance
Includes isolation valves, hose barb
fittings, clamps, CO2 gauge and tees
Installation, operation and service info.
Section 13 - Troubleshooting Guide For Service Agent
Green LED not
Possible Cause
Poor power cord
connection / blown power
Incorrect input voltage
External fuse blown or
circuit breaker tripped
Green LED
illuminated but no
N2 storage (tank)
pressure drops during
period of no use.
Compressor motor
runs excessively;
Unable to reach
maximum N2 storage
On/Off switch failure
Unit is in normal „rest‟
mode until N2 storage
pressure drops to 130 psi.
Internal fuse blown
Internal leak in CarboDraught Max unit.
Leak in N2 storage or
supply line
Leak in beer gas circuit or
keg coupling
Page 20
Corrective Action
Be sure the power cord is securely
connected to the power supply outlet
and to the unit. Check / replace 10A
fuse located in power socket.
Check „main‟ voltage and rating
number plate for voltage spec.
Check fuse, replace if necessary.
Reset circuit breaker / Check for
Verify power to unit. Replace switch
No corrective action is necessary.
Check fuses on printed circuit board.
Replace as necessary
Close “N2 To Storage” valve and run
unit to max. pressure. Check for and
correct any leaks in the compressed
air and N2 pressure circuits.
Leak-check line fittings and
connections. Correct leak(s)
Ensure keg tap couplings are secure.
Check gas line and regulator
Troubleshooting - continued
Low blend gas
pressure; beer
pouring slow
Power off
Dispense gas pressure
control module(s) set low
or turned off
Low CO2 inlet (line) gauge
pressure (below 60 psi)
Out of CO2
Low N2 storage pressure
(below 60 psi)
Excessive beer
Temperature problem
Incorrect dispense gas
Page 21
Check on/off switch and power circuit
Ensure pressure control module
valve is open and adjust pressure.
If unable to adjust pressure upward,
check input gas supply pressures.
Check CO2 supply (tank) pressure
and contents.
Ensure valves are open
Switch to back-up CO2 if equipped.
Have CO2 storage tank refilled.
If green and amber LED‟s are on and
compressor is cycling, unit may be in
normal charge mode. Check for
leaks in N2 lines and beer gas lines.
Check cooler and pour temperatures
Check pour rate. Check dispense
gas pressure at pressure control
modules on Carbo-Draught Max.
Check dispense gas pressure at
the keg.
Consult with beer system installer or
beer distributor
Section 14 - Service and Parts
Service and Maintenance
1.) Service or maintenance on the Carbo-Draught 1000 and Carbo-Draught Pro
should be performed only by Fizz trained and authorized professional service
agents who are familiar with gas pressure systems and all pertinent safety and
service procedures.
Fizz recommends the use of Fizz approved replacement parts.
2.) Before calling your service agent or CO2 supplier for service or troubleshooting
assistance, please have the following information:
- Serial number of the Carbo-Draught unit
- Description of the situation
Readings from pressure gauges (CO2 supply, N2 storage, Gas Blend
Temperature of cooler and beer at faucet if appropriate.
- Special observations such as excessive beer foaming or continuous
compressor operation.
3.) Fizz recommends that a thorough preventive maintenance check be performed
on the Carbo-Draught 1000 and on the Carbo-Draught Pro system annually by
a qualified professional service agent.
Replacement of the compressor air inlet filter, the coalescing filter, and the
silencer filter assembly should be performed at least every twelve months
or more frequently, depending on environmental conditions. Filter kit: Fizz
P/N 97002.
4.) The Carbo-Draught units have no user serviceable parts. All service work
should be performed by an authorized professional service agent.
Service or modifications performed on the system by unauthorized persons
will void the warranty.
Important Telephone Numbers:
Carbo-Draught System Installer: ___________________________________
Carbo-Draught / CO2 Service Agent: _______________________________
Fizz Dispense Optimization Group: (800) 253 - 6610 [toll free in U.S.]
Page 22
Section 15 - Process & Instrumentation Diagram / Electrical Wiring
25% CO2
60% CO2
25% CO2
Page 23
Section 16 – Warranty
Warranty Policy
Fizz Dispense Optimization Group, LLC warrants to the Purchaser the Carbo-Draught
system shall be free from any defects in workership and materials for 24 months from the
date of shipment from Fizz. Purchaser agrees that as a pre-condition to any Fizz liability
hereunder, Purchaser or its appointed agents shall fully inspect all goods immediately
upon delivery and shall give Fizz written notice of any claim or purported defect within ten
(10) days after discovery of such defect. Use of the Carbo-Draught system without the
recommended inlet air quality (Section 10 of this manual) or genuine parts will expressly
invalidate the warranty.
As a further pre-condition to any Fizz liability hereunder, a Fizz approved service company
must perform parts replacement. Fizz may elect to repair or replace such equipment or
any defective component or part thereof which proves to be defective, or to refund the
purchase price paid by the original Purchaser. Fizz shall not be liable for defects caused
by the effects of normal wear and tear, erosion, corrosion, fire, explosion, misuse, or
unauthorized modification.
Alterations or repair by others than those designated and approved by Fizz or operation of
such equipment in a manner inconsistent with Fizz accepted practices and all operating
instructions, unless pre-authorized in writing by Fizz, shall void this Warranty.
Fizz‟s sole and exclusive liability under this Warranty is to the Purchaser and shall not
exceed the lesser of the cost of repair, cost of replacement, or refund of the net purchase
price paid by the original Purchaser. Any accessories, parts and equipment supplied by
Fizz but not manufactured by Fizz shall carry whatever warranty the manufacturer has
given to Fizz providing it is possible for Fizz to pass on such warranty to the customer.
Fizz is not liable for any losses (including CO2 or beer), back up gas supply, damages, or
costs of delays, including incidental or consequential damages. These include lost profits
and the cost of the installation or removal of any products or parts, the installation of
replacement products, and any inspection, testing, or redesign caused by any defect or by
the repair or replacement of products arising from a defect in any product. Fizz specifically
makes no warranties or guarantees, expressed or implied, including the warranties of
merchantability or fitness for a particular purpose or use, other than those warranties
expressed herein.
Page 24
All warranty claims must be previously authorized by Fizz Dispense Optimization
Group, LLC. Telephonic / electronic approval may be obtained by contacting Fizz
- Telephone: 800 – 253 - 6610
- Facsimile: 678 – 792 – 7784
or by writing to:
Fizz Dispense Optimization Group, LLC
PO Box 1003
Adairsville GA 30103
Authorization must be obtained from Fizz prior to shipping any equipment to Fizz
facilities. The model and serial number of the unit must be provided in order to
process the return. If approved, a Return Material Authorization (RMA) number and
proper shipping address will be provided. The RMA number must be prominently
indicated on the packing slip and any packaging that accompanies the goods being
returned. The customer returning the goods is responsible for all freight, proper
packing, and any damage incurred during shipment of the goods back to Fizz.
Page 25
Copyright: Fizz Dispense Optimization Group, LLC March 2005
dh stock code reference:
Page 26
Fizz Part No. 11707204 Rev. 0, 3-05
17 626 0502
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