Market Forge Industries SIRIUS II Series User manual

MANUAL 14-0268 REV 9 (07/22)
$21.00
SIRIUS II - GAS BOILERLESS
CONVECTION STEAMER
MANUAL SECTION CO
IMPORTANT FOR FUTURE REFERENCE
Please complete this information and retain this
manual for the life of the equipment:
Model #:
___________________________
Serial #:
___________________________
Date Purchased:
_____________________
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury
or death. Read the installation, operating and maintenance instructions thoroughly before installing or
servicing this equipment.
CROWN FOOD SERVICE EQUIPMENT
A Middleby Company
70 Oakdale Road, Downsview (Toronto) Ontario, Canada, M3N 1V9
Telephone: [phone] www.crownsteamgroup.com
SIRIUS II
Gas Boilerless Convection Steamer
SIRIUS II-(4, 6, 8, 10 & 12)
Installation & Operation Manual
Sirius II - 6 Sirius II - 10

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22)
PAGE 2 OF 20
SIRIUS II - 
SAFETY PRECAUTIONS
Copyright © 2021 by Market Forge. All rights reserved. Published in the United States of America.

WARNING
Improper installation, operation, adjustment, alteration, service or maintenance can cause property damage, injury or death.
Read the installation, operating and maintenance instructions thoroughly before installing, operating or servicing this equipment.
NOTICE
This manual should be retained for future reference.
NOTICE
This product is intended for commercial use only. NOT FOR HOUSEHOLD USE.
WARNING
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury or death.
WARNING
FOR YOUR SAFETY:

IMPORTANT
PURCHASER: Instructions to be followed in the event the operator of this appliance smells gas must be posted in a
prominent location. This information shall be obtained by consulting the local gas supplier.
The information contained in this manual is important for the proper installation, use, and maintenance of this steamer.
Adherence to these procedures and instructions will result in years of trouble-free service.
Please read this manual carefully and retain it for future reference.

without notice.

precautions. Accidents and problems can be caused by failure to follow fundamental rules and precautions.
The following symbols, found throughout this manual, alert you to potentially dangerous conditions to the operator,
service personnel, or to the equipment.
CAUTION
WARNING
NOTICE
This symbol warns of immediate hazards that will result in severe injury or death.
This symbol refers to a potential hazard or unsafe practice that could result in injury or death.
This symbol refers to a potential hazard or unsafe practice that could result in injury, product
damage, or property damage.
This symbol refers to information that needs special attention or must be fully
understood, even though not dangerous.
DANGER
IMPORTANT NOTES FOR INSTALLATION AND OPERATION

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22) PAGE 3 OF 20
SIRIUS II - 
RETAIN THIS MANUAL FOR FUTURE REFERENCE.
Table of Contents
Important Notes For Installation and Operation.................................................................... 2
Service Connections............................................................................................................. 4
Introduction ........................................................................................................................... 6
Installation............................................................................................................................. 8
Operation .............................................................................................................................. 12
Maintenance ......................................................................................................................... 16
TC

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22)
PAGE 4 OF 20
SIRIUS II - 
SERVICE CONNECTIONS


WATER SUPPLY AND DRAIN SPECIFICATIONS
Each single compartment has one rear drain connection
4” clearance left mandatory, right and rear is recommended.
Location near a floor drain is recommended.
NOTES
Good quality water feed is the responsibility of the owner. Water quality must be within the following general guidelines.
TDS: 40-125 ppm Hardness: 35-100 ppm pH: 7.0 - 8.5 Silica: <13 ppm Chlorides: <25 ppm Chlorine: <0.2 ppm Chloramine: <0.2 ppm
The best defense against poor water quality is a water treatment system designed to meet your water quality conditions.
Pressure: 25(min)-50(max) PSI Connections: Trough drain: 1/2 MNTP Drain out: 1” FNPT Water: 3/4” male garden hose
Appliance to be installed with backflow protection according to federal, state or local codes.
The drain piping must consist of temperature resistant material, greater than 160°F, and be of adequate diameter not to cause flow
restriction. Improper materials may deform and cause restrictions, thus affecting performance.
 oducts
Each compartment requires separate electrical & water connection.
The manufacturer reserves the right to modify materials and specifications without notice.
GAS PRESSURE AND CONNECTIONS
Natural - 3.5” WC required, not to exceed 13.5”
Propane - 9” WC required, not to exceed 13.5”
Gas pipe size: 1/2” NPT required as a minimum
DIMENSIONS ARE IN INCHES [MM]
24.00 [610]
19.00 [483]
6.00
[152]
20.00 [508]
FRONT VIEW
3.88
[98]
4.75 [121]
2.00 [51]
Sirius II-4
26.25 [667]
Sirius II-6
33.25 [845]
Sirius II-4
15.38 [391]
Sirius II-6
22.38 [568]
30.75 [781]
28.75 [730]2.00
[51]
17.75 [451]
Pull out service
drawer
Door in open
position
2.00
[51]
22.00 [559]
SIDE VIEW
4.75
[121]
REAR VIEW
5
[127]
6.50
[165]
6.25
[159] Steam
Vent
Flue
1.50
[38]
2.00
[51]
21.00
[533]
8.50
[216]
3.25
[83]
Water in
Gas in
1/2” NPT
Pans Sirius II-4 Sirius II-6
12” x 20” x 2.5” 4 6
12” x 20” x 4” 2 4
12” x 20” x 6” 1 2
Sirius II-4 Sirius II-6
Voltage 120V 120V
 27,000* 27,000*
Gas NPT 1/2” 1/2”
SPECIFICATIONS AND COMPARTMENT PAN CAPACITY
DIMENSIONS ARE IN INCHES [MM]
FRONT VIEW SIDE VIEW REAR VIEW

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22) PAGE 5 OF 20
SIRIUS II -  
NOTES

WATER SUPPLY AND DRAIN SPECIFICATIONS
ASirius II-8
Sirius II-10
Sirius II-12
B
C
24.00 [610]
19.00 [483]
3.88 [98]
Stacking
Collor
4.75 [121]
4.13 [105]
A56.63 [1438]
63.63 [1616] 70.63 [1794]
B C
A/B 15.38 [391]
22.38 [568]
C
A/B 26.25 [667]
33.25 [845]
C
6.00 [152]
2.00 [51] 20.00 [508]
FRONT VIEW LEFT SIDE VIEW
32.50 [826]
28.75 [730] 17.75 [451]
Pull out service
drawer
Door in
open position
2.00 [51] 22.00 [559] 4.75 [121]
DIMENSIONS ARE IN INCHES [MM]
5
[127]
Flue Steam Vents
REAR VIEW
Gas in
1/2” NPT
(each unit
required
gas line)
3.25 [83]
Water in (each unit
requires water line)
21.00
[533]
8.50 [216]
SPECIFICATIONS AND COMPARTMENT PAN CAPACITY
GAS PRESSURE AND CONNECTIONS
Pans Sirius II-8 Sirius II-10 Sirius II-12
12” x 20” x 2.5” 8 10 12
12” x 20” x 4” 4 6 8
12” x 20” x 6” 2 3 4
Sirius II-8 Sirius II-10 Sirius II-12
Voltage 120V 120V 120V
 27,000* 27,000* 27,000*
Gas NPT 1/2” 1/2” 1/2”
Natural - 3.5” WC required, not to exceed 13.5”
Propane - 9” WC required, not to exceed 13.5”
Gas pipe size: 1/2” NPT required as a minimum
Good quality water feed is the responsibility of the owner. Water quality must be within the following general guidelines.
TDS: 40-125 ppm Hardness: 35-100 ppm pH: 7.0 - 8.5 Silica: <13 ppm Chlorides: <25 ppm Chlorine: <0.2 ppm Chloramine: <0.2 ppm
The best defense against poor water quality is a water treatment system designed to meet your water quality conditions.
Pressure: 25(min)-50(max) PSI Connections: Trough drain: 1/2 MNTP Drain out: 1” FNPT Water: 3/4” male garden hose
Appliance to be installed with backflow protection according to federal, state or local codes.
The drain piping must consist of temperature resistant material, greater than 160°F, and be of adequate diameter not to cause flow
restriction. Improper materials may deform and cause restrictions, thus affecting performance.
Each single compartment has a separate rear exiting drain
plumbed directly into the stacked steamers main drain/vent line.
4” clearance left mandatory, right and rear is recommended.
Location near a floor drain is recommended.
4” stacking collar between units (included when ordered)

The manufacturer reserves the right to modify materials and specifications without notice.
DIMENSIONS ARE IN INCHES [MM]
FRONT VIEW SIDE VIEW REAR VIEW

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22)
PAGE 6 OF 20
SIRIUS II - 

Congratulations on purchasing the Market Forge Sirius II. The Sirius II is a single compartment countertop or two


The cooking chamber of the SIRIUS II is treated with a scratch resistant, non-stick surface. A drain from the rear of the
steamer is provided for easy safe draining.

propane gas.
INTRODUCTION
I
CAUTION
Do not use utensils, steel wool, or other harsh abrasives to clean your steamer. Scratching of the non-stick surface
and stainless steel casing may occur.

As with any cooking process, or with any piece of commercial cooking equipment, there are potential hazards to both
the operator and the piece of equipment if care is not taken. In designing the Sirius II steamer, safety features have
been built in to protect against many of these potential hazards, but TRAINING OF EACH OPERATOR AND CAREFUL
ADHERENCE TO ALL WARNINGS ARE NECESSARY TO ENSURE THE SAFETY OF USERS.
Diagnostic Sensor Shut-o󰀨: The thermostat controller has a built in diagnostic feature that will automatically shut down
the burner if the sensor probe fails, which will avoid overheating.
High Limit Shut-o󰀨: If the steamer runs dry the burner will shut down.
Overow

WARNING
                   


will void the warranty.
High Water Sensor: Two water level sensors are located on the lower backside of the steamer. The lower sensor
󰀨
that both sensors are kept clean so that the stainless part is shiny.
WARNING

the steamer.
Door Open Safety Switch: There is a safety switch built into the door frame that shuts down the burner, fan and lights

ORDER FOR THE STEAMER TO FUNCTION. IF STEAM IS ESCAPING, DOOR IS NOT PROPERLY SHUT AND MAY
AFFECT COOK TIMES, PRODUCT QUALITY AND WATER CONSUMPTION.

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22) PAGE 7 OF 20
SIRIUS II -  I
Time Delay Relay: The steamer has two timers built into the electrical system to shut down should the water level system

longer than 60 seconds for the level of the water to come into contact with the lower water sensor probe, the burner and
󰀨
back on.
Ignition Control󰀨
Wait 5 minutes and turn on again.
WARNING


• 4-pan: External dimensions are 24” wide x 26¼” high (plus 4”-6” adjustable legs) x 28¾“ deep (plus vent pipe).
• 6-pan: External dimensions are 24” wide x 33¼” high (plus 4”-6” adjustable legs) x 28¾” deep (plus vent pipe).
• 8-pan: External dimensions are 24” wide x 52½” high (plus 6”-9” adjustable legs) x 28¾” deep (plus vent pipe).
• 10-pan: External dimensions are 24” wide x 59½” high (plus 6”-9” adjustable legs) x 28¾” deep (plus vent pipe).
• 12-pan: External dimensions are 24” wide x 66½” high (plus 6”-9” adjustable legs) x 28¾” deep (plus vent pipe).

Should repairs be required, a network of authorized agencies is available to assist with prompt service.
A current Directory of Authorized Service Agencies may be obtained by contacting the factory or visiting our website at


INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22)
PAGE 8 OF 20
SIRIUS II - 
I

Damage Inspection: Reporting shipping damage is the responsibility of the purchaser.

packaging for damage. Remove wrapping. Inspect the exterior of the Sirius II for visible shipping damage.
Unpacking / Removal from Pallet: To remove the steamer from the pallet, carefully cut the strapping. Make sure the pan
racks, water reservoir cover and standpipe installed inside the steamer have not become dislodged during shipping.
Assembly
Legs / Caster Installation: Install 4 legs or casters (shipped inside the steamer) into the threaded mounting holes located
on the base of the unit. If casters are supplied, locking casters should be on the front of the steamer.

1. Position the heat shield so that the notch in the shield is in the front right of the unit.
2. Use screw, lockwasher, washer and spacer to secure the heat shield as shown.

98% of all maintenance and service can be done from the front or left side. The Sirius II steamer must be installed under
a properly designed ventilation hood. (See Venting). A minimum of 6” clearance from adjacent equipment on the left side

WARNING

I

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22) PAGE 9 OF 20
SIRIUS II - 

The Sirius II must be installed in an adequately ventilated area under a properly designed exhaust hood. Failure to do so could


Vent Pipe Installation (double & single compartment steamers): Steamers come with the vent piping in rear of unit
completely assembled. Two 90° elbows are shipped loose for your convenience that may be useful in running a drain line

Air Intake: The air intake to the burner in the bottom of the unit should not be obstructed in any manner. The
installation of the unit must comply with local codes or, in the lack of local codes, with the ANSI Z223.1 (latest edition)
and the National Fuel Gas Code.


3.5” W.C. For LP or propane gas the required supply pressure is 9” of W.C. Consult your local gas supplier or installing
agency to properly size the gas pipe supplying gas to the appliance. For installation in Canada the unit installation must

NOTICE
A qualified electrician must perform all electrical hookups and meet all local codes. Installation is the
responsibility of the purchaser.

The Sirius II steamer is equipped with a 120 volt cord and three- prong (grounding) plug for your protection against
shock hazard and should be plugged directly into a properly grounded three-prong receptacle. Do not cut or remove the
grounding prong from this plug.
The appliance must be electrically grounded in accordance with local codes, or in the absence of local codes, with the
National Electric Code (ANSI/NFPA70), or the Canadian Electric Code (CSA C22.2) as applicable.
NOTICE

Installation is the responsibility of the purchaser.
NOTICE
Stacked units will require 2 separate electrical connections.
I

Water Hookup: Steamer requires 1/2” water line. Termination is 3/4” male garden hose connection. Make sure waterline is
󰀨
Double (stacked) compartment steamers require separate water connections, which may be manifolded. Inadequate



Do not connect to de-ionized water. Probes will not sense the level of the water. Recommended water pressure is 30 – 35 lbs.
CAUTION
Flush incoming water line prior to connecting to steamer. Debris in water lines may cause solenoid valve to
󰀨

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22)
PAGE 10 OF 20
SIRIUS II - 
Recommended Water Quality: Refer to Service Connections in this Manual for the recommended water quality criteria.
NOTICE
Water level probes will not sense water level if steamer is connected to a de-ionized water or reverse osmosis system.
WARNING
The water may be very hot. It is advisable to allow the water to cool down before draining. Leaving the door open
will aid cooling.
WARNING

WARNING

Rear Drain
However, one 90° elbow is shipped with the steamer to be used as needed. The drip trough located under the door is
plumbed to the main drain internally.
The drain piping must consist of temperature resistant material, greater than 160°F, and be of adequate diameter not to
󰀨
Customer supplies plumbing, however, one 90° elbow is supplied with the steamer to be used as needed. The drip trough
located under the door is plumbed to the main drain internally.
Overow Pipe



done by turning the base of the leg. Use the top of the steamer casing as a reference. It is recommended to use a level to
ensure proper installation.
I




facing to the front of the steamer. Repeat this process for the rack mounted on the other side. These racks are designed
to be removed easily for cleaning.

Once your steamer is in place and properly leveled, plumbed and wired, test unit to make sure it is functioning properly.

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22) PAGE 11 OF 20
SIRIUS II - 

 
2. Make sure water is connected and supplied to the steamer.
3. Make sure appropriate gas is connected and supplied to the steamer.
4. Using a soft sponge and mild detergent, wipe out the interior of the cooking chamber to remove shipping debris prior
to use. Rinse with clean water.
CAUTION
Do not use any abrasive cleaners, utensils or scrubbers on the non-stick coating. Use vinegar and water to clean
reservoir. Nylon bristle brushes or soft sponges are recommended.
 
 

7. Power On/Heat Up: Make sure the door is closed, then turn the cooking mode selector to the 1 position. The Amber
HEATING light on the upper left corner of the control panel will turn on. If the burner does not light, turn power switch
󰀨
NOTICE
The burner can be seen from the underside of the steamer. When the HEATING light goes out (it takes less than 25
minutes) you are ready to test the steamer.
WARNING
󰀨
and contact your gas company and service agent.
WARNING
Do not attempt operation of this unit during a power failure.
WARNING

I
8. Turn the cooking mode selector switch to the 2 position. The HEATING light will go on as heat is called for. You may
󰀨

󰀨
 
10. Drain Steamer
air gap drain. To drain, turn the drain valve handle 90 degrees.

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22)
PAGE 12 OF 20
SIRIUS II - 
OPERATION

Electrical Connection: Make sure unit is plugged into a proper receptacle or wired properly and the breaker for the circuit is on.
Water Connection: Make sure the steamer is properly connected to a water source. Do not connect the unit to de-ionized

Gas Connection: Make sure the unit is properly connected to the gas supply line and that all gas valves prior to the unit
are open.


door opening.
Automatic Waterll󰀨
and manually drained.
Clean Probe Indicator
shut down the burners until the fault has been cleared. Most commonly, this requires cleaning the water sensor probes.
CAUTION

to a hot, dry reservoir.
Condensate Trough: The trough under the door catches water dripping from the door and exits the steamer at the rear.
Power On / Heat Up: Make sure the door is closed then turn the cooking mode selector to the desired temperature setting
󰀨
not light, contact your local service agent or the factory.
NOTICE
The burner can be seen from the underside of the steamer.
󰀨
󰀨
WARNING
󰀨
and contact your gas company and service agent.
WARNING
Do not attempt operation of this unit during a power failure.
WARNING



INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22) PAGE 13 OF 20
SIRIUS II -  
Door Operation: The door must be closed at all times while cooking. If the door is opened during cooking, the burner will
󰀨


Pan Combinations: The Sirius II steamer accommodates 4” and 6” deep pans. However, for best steam cooking

The steamer will accommodate gastronorm pans.
Pan Size Quantity per 4-pan steamer Quantity per 6-pan steamer
12 × 20 × 1¼ 8 12
12 × 20 × 2½ 4 6
12 × 20 × 4 2 4

COOKING WITH ATMOSPHERIC / PRESSURELESS STEAM
• Atmospheric or pressureless steaming is perfect for a la carte cooking. The door can always be opened during
cooking to add or remove pans of food, to season food or to check on its progress.

Large and small portions of food can be cooked at the same time.
• Less attention is required to cooking foods and overcooking is rare.
Recommended Uses
A La Carte Preserving Stewing
Thawing  Rethermalizing
Simmering Poaching
Typical Foods
Casseroles, Fresh or Frozen Vegetables, Fresh or Frozen Seafood, Fresh or Frozen
Desserts Pasta Rice
Fruits Potatoes Cereals
Eggs Meats Poultry
Prepared Foods Sauces And Much More
Tips On Cooking Frozen Product
• Preheat cooking compartment.
 
• If product is an ice block, set it in the pan on its narrowest side. This allows the steam to contact a greater surface area.
• Thawing is faster and better for the food in atmospheric steaming.
• Make sure frozen product is uniform in size to get best results.
• Season vegetables AFTER steaming.
 
• When reheating prepared foods, stir occasionally to speed heating.
• Shallower pans will allow faster cooking times.
NOTICE
If the door is open, nothing will happen. Close the door and the steamer will turn on and begin warming up.

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22)
PAGE 14 OF 20
SIRIUS II - 


reduces total cooking time, helps ensure complete cooking and a moist product. Potatoes, poultry and seafood are

Tips On Pan Use
• For faster cook times, 2 1/2” deep perforated pans are recommended.
• It is not necessary and we do not recommend covering most pans of product. When cooking with only one pan, place
it in the center of the cooking chamber.
• Use solid pans where appropriate: scrambled eggs, rice, beans, dehydrated foods, prepared casseroles, sauces, cake or
other desserts (you can bake a cake in atmospheric steam), and when you want to prevent food from dripping on a lower pan.
• When cooking proteins (meat, poultry or seafood) use a solid catch pan under the perforated pan. Accumulated juices
can be used for soup stock, gravy or broth.
• Protein foods (meat, poultry or seafood) can be cooked in perforated or solid pans. If you are batch-cooking protein
foods use perforated pans and place a solid pan on the bottom rail. All the juices will then accumulate in this pan for
later use and to keep them out of the water reservoir.
• When atmospheric steaming, a pan cover can increase the cooking time up to 400%. Items such as frozen
casseroles, meat loaf, or sauces can be covered to avoid excess condensation.
• Root vegetables should be steamed in a perforated pan.
• Eggs can be hard cooked out of the shell and then chopped to avoid peeling shells.
• Always cook potatoes in perforated pans. This allows steam to circulate properly.
Other Helpful Hints
 
much easier.
• Stale or frozen bread can be thawed or renewed in your steamer.
• Allow adequate spacing between pans for even steam circulation. Your pan rails and the shape of the steamer walls

cook best with perforated pans.
• Loosely packed pans will cook faster than tightly packed pans.
• To skin tomatoes, oranges etc. more easily, steam for a short time, then chill in cold water.
• When steaming pasta, shrimp, or ground meat, nesting a perforated pan in a solid pan works well. Lift out the
perforated pan to drain.
• Never have the water high enough or a pan low enough to touch water. Allow enough space for steam circulation.
Steam has 6 times more energy than boiling water – use the steam to cook.
Other Helpful Hints (continued)
• When possible, cook in two shallow pans instead of one deeper pan – it cooks faster and you avoid bruising the product.
 󰀨
unloading easier.
 󰀨󰀩
• Pre-cook roasts, especially fat-encrusted roasts, in steam for 1/3 of their cooking time, then place in oven. Juices are

• Cook whole poultry the same way, only cook it until it is nearly completed and allow just enough time in the oven to



INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22) PAGE 15 OF 20
SIRIUS II -  

Warnings
 


 
the steamer.
 
the purchaser.
 
 
• The reservoir water may still be hot. It is advisable to let the water cool down prior to draining.
• The cooking chamber is designed to retain heat. It may still be hot to the touch when cleaning. Wear protective
gloves, or wait for the surface to cool before cleaning. Do not add cold water to a hot empty cooking chamber until unit
has cooled down or damage may result.
Cautions
• Do not use utensils, steel wool, or other harsh abrasives to clean your steamer. Scratching of the non-stick surface
and stainless steel casing may occur.
• Flush incoming water line prior to connecting to steamer. Debris in water lines may cause solenoid valve to
󰀨
• Do not use any abrasive cleaners, utensils or scrubbers on the non-stick coating – this will damage the coating. Use
vinegar and water to clean reservoir. Nylon bristle brushes or soft sponges are recommended.
 
hot, dry reservoir.
Cooking: When ready to cook turn the cooking mode selector dial to the desired setting.
NOTICE
If starchy food products (potatoes, pasta) cause water to get frothy add 2 tablespoons of cooking oil to the
water to control foaming.
WARNING
The reservoir water may still be hot. It is advisable to let the water cool down prior to cleaning.
NOTICE
Opening the steamer door will speed the cooling process. It is also advisable to leave the steamer door open
when not in use. This will lengthen the life of the door gasket.
Setting Temperature Use for
1 180 °F
11,069 ohms
Green vegetables, delicate egg dishes, and seafood for higher
yield. Cook times will be slower than steaming.
2 212 °F
6,311 ohms
Steam cooking
3 Steam Plus Radiant Heat
230 °F
4,695 ohms
Heavy dense foods like meat or potatoes, retherm frozen foods.
Shut down, draining and cleaning of steamer.
1. Shut Down
2. Water Reservoir Draining: To drain, turn the drain valve handle 90 degrees.

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22)
PAGE 16 OF 20
SIRIUS II - 


Daily Cleaning
󰀨
WARNING
The cooking chamber is designed to retain heat. It may still be hot to the touch when cleaning. Wear protective gloves,
or wait for the surface to cool before cleaning. Do not add cold water to a hot, empty cooking chamber until it has
cooled down, or damage may result.
NOTICE
Only use mild soap, white vinegar, and water to clean your steamer. Do not use abrasive utensils, caustic cleaners,
or products containing chlorine, lye, or phosphorus (such as Lime-A-Way). After cleaning, rinse thoroughly by wiping
with a wet cloth dampened with fresh water. Never spray water on your steamer.
FAILURE TO FOLLOW PROPER INSTRUCTIONS MAY CAUSE AN UNSAFE CONDITION AND/OR DAMAGE
YOUR STEAMER, AND WILL VOID YOUR WARRANTY.
NOTICE
It is always advisable to leave the steamer door open when the unit is shut down for the evening. This will extend the life of
your gasket.
NOTICE
It is normal for the white lime to collect at the water line and in the reservoir area. Liming is easily removed with daily cleaning
     󰀨               
reservoir on a daily basis.
 󰀨
2. Lift reservoir cover out of cooking chamber compartment, clean cover.
 
4. Using a soft sponge, clean the non-stick coating on the interior of the cooking chamber.
5. Clean the door gasket with gentle soap and water and allow to air dry.
6. Rinse the cooking chamber and door area with clean water. Rinse the cavity.
7. Wipe with clean towel or soft sponge.
8. To remove the white mineral deposits at and below the water line, spray white vinegar directly on the mineral build-up

water reservoir and turn on steamer to add enough water to cover the white minerals, let soak for half an hour or overnight.
Loosen mineral deposits with a nylon bristled brush. Drain, wipe and rinse. Use water and white vinegar to clean reservoir.
9. Make sure two stainless probes on lower backside of cooking chamber interior are clean.
10. Wipe out the condensate trough located under the door. Remove food particles. Make sure the drain is kept clear.
11. Make sure the drain is kept clear.

must be replaced or the steamer will not function properly.
 


INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22) PAGE 17 OF 20
SIRIUS II -  
Weekly Cleaning
In addition to the daily cleaning it is necessary to clean the air intakes on a weekly basis. Air intakes provide necessary cooling air
to the internal components. They are generally located on the rear and sides of the equipment.
Monthly Cleaning
Market Forge recommends using Optipure DSP descaling powder to clean your steamer on a monthly basis or whenever
necessary.
NOTICE
󰀨
DSP is a non-hazardous, biodegradable citrus based powder that when mixed with water becomes a powerful lime
scale remover. For additional information contact Optipure at 800-535-5035.
NOTICE
One pound is equal to 16 scoops (measuring scoop included), or one-half of a 2 lb. jar of descaling powder.
 󰀨
2. Drain water from the cooking cavity and wipe away any food debris.
3. Make sure the drain is plugged.
4. Pour one pound of Optipure DSP per steamer into the bottom of the cooking cavity.
 
6. Allow the unit to reach steaming temperature and continue steaming for one hour.
 󰀨
8. Drain the unit, and rinse the entire cooking chamber thoroughly.
9. If the unit is heavily scaled, it may be necessary to repeat the process.

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N

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N

INSTALLATION & OPERATION MANUAL 14-0268 REV 9 (07/22)
PAGE 20 OF 20
SIRIUS II - 
SIRIUS II-(4, 6, 8, 10 & 12)
SIRIUS
Convection Steamer
A product with the Market Forge name incorporates the best in durability and low maintenance. We all recognize,
however, that replacement parts and occasional professional service may be necessary to extend the useful life of
this appliance. When service is needed, contact a Market Forge Authorized Service Agency, or your dealer. To avoid
confusion, always refer to the model number, serial number, and type of your appliance.
CROWN FOOD SERVICE EQUIPMENT
A Middleby Company
70 Oakdale Road, Downsview (Toronto) Ontario, Canada, M3N 1V9
Telephone: [phone] www.crownsteamgroup.com