Alto Shaam 20-20 Service Manual

#6011 • 1/2001

PRINTED IN U.S .A .

INSTALLATION, OPERATION and CARE MANUAL

W164 N9221 Water Street ●P.O. Box 450 ●Menomonee Falls, Wisconsin 53052-0450 U.S.A.

PHONE: 262.251.3800 FAX: 262.251.7067 • 800.329.8744 U.S.A. ONLY WEBSITE:

800.558.8744 U.S.A./CANADA 262.251.1907 INTERNATIONAL www.alto-shaam.com

Gas Models:

6•10, 7•14,

10•10, 10•20,

12•18 & 20•20

Gas-Fired Combination

Oven/Steamer

United States & Canada Models

COMBITHERM

INSTALLATION, OPERATION, AND MAINTENANCE

INSTRUCTION MANUAL

MODELS

6•10, 7•14, 10•10, 10•20, 12•18 & 20•20 GAS

SAFETY:

Do not store or use gasoline or other flammable vapors or liquids

in the vicinity of this or any other appliance.

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.

NOTE:

In some prominent location, instructions obtained from the local gas supplier must

be posted indicating procedures to be followed in the event that the user smells gas.

GAS FOOD SERVICE EQUIPMENT

ANS Z83.11.CGA 1.8-(1996) Food Service Equipment ANS Z83.11.CGA 1.8-(1996) Manager Service Equipé

Underwriters Laboratories, Inc.

CLASSIFIED

GAS-FIRED FOOD EQUIPMENT ANS Z83.12 • CAN 1.10 (1994) - OVEN ANS Z83.12 • CAN 1.10 (1994) - FOUR

The information contained in this manual is important for the proper installation,

use and maintenance of this oven. Please read carefully and retain for future

reference. Improper connection of this appliance will nullify all warranties.

NSF Std

No. 4 - 1996

GAS

CUS

COMBITHERM

FOUR/CONVECTION VAPEUR

MANUEL D'UTILISATION D'INSTALLATION, DE MISE EN ROUTE

ET D'ENTRETIEN POUR LES

MODELES SUIVANTS:

6•10, 7•14, 10•10, 10•20, 12•18 & 20•20 GAS

ADVERTISSEMENT

Ne pas entreposer ni utiliser de l'essence

ni d'autres vapeurs ou liquides inflammables

dans le voisinage de cet appareil,

ni de tout autre appareil.

ADVERTISSEMENT

Une installation, un ajustement, une altération, un service

ou un entretien non conforme aux normes peut causer des

dommages a'la propriété, des blessures ou la mort. Lisez

attentivement les directives d'installation, d'opération et

d'entretien avant de faire l'enstallation ou l'entretien

de cet équipement.

NOTE

En dernier reours, les instructions provenant du fournisseur local de

gas doivent être mises en evidence de maniere a indiquer les

procedures à suivre au cas ou l'utilizateur sentirait le gaz.

GAS FOOD SERVICE EQUIPMENT

ANS Z83,11.CGA 1.8-(1996) Food Service Equip.

ANS Z83.11.CGA 1.8-(1996) Manager Service Equipé

Underwriters Laboratories, Inc.

CLASSIFIED

GAS-FIRED FOOD EQUIPMENT ANS Z83.12 • CAN 1.10 (1994) - OVEN ANS Z83.12 • CAN 1.10 (1994) - FOUR

MIES EN GARDE

Les informations contenues dans ce manuel sont importantes pour l'installation l'utilisation et l'entretien de ce four. S'il vous plait lisez-le tres attentivement et conservez-le. La nonapplication de ces consignes annule toutes garanties.

NSF Std

No. 4 - 1996

CUS

GAS

TABLE OF CONTENTS

SECTION 1 - INSTALLATION

1.1 Delivery/Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.2 Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.3 Codes & Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.4 Unit Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.5 Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.6 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.7 Air Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.8 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.9 Water Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.10 Waste Water Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1.11 Gas Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Type & Pressure • Connection • Leak Testing • Fuel Interlock System

1.12 Gas Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

1.13 Pressure Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Natural Gas • Propane Gas

1.14 Gas Flame Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.15 Intermittent Pilot - Honeywell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

#1 Checking Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

#2 Adjust Pilot Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

#3 Manifold Pressure Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

#4 Ignition & Burner Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

#5 Verify Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

1.16 Honeywell Valve System • Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

1.17 Continuous Pilot - Sit-Nova . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

#1 Checking Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

#2 Adjust Pilot Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

#3 Manifold Pressure Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

#4 Ignition & Burner Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

#5 Verify Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

1.18 Installation Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Installation Inspection • User/Operator Instructions • End of the Day • Functions • Oven Use Explanation • Service Panel Use • Cleaning

SECTION 2 - OPERATION

2.1 Control Panel Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Control Keys with Key Descriptions

2.2 System Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Steam • Burner • Fan • Low Water

2.3 Program Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Steam Program • Superheated Steam & Convection Convection • Bio Steam • Retherm

2.4 Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Digital Displays

2.5 Temperature/Time Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Cook Temperature • Timer • Core Temperature

Up/Down Arrow Keys • Start/Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2.6 Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Humidity Control

2.7 Main Combitherm Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Power Switch

Burner Control - Continuous Pilot - Sit-Nova Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Burner Control - Intermittent Pilot Honeywell Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Programmable Control/Module • Cleaning Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Page

SECTION 2 - OPERATION.....continued

2.8 Basic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

General Operation - Helpful Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Safety Precautions - Steam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Oven Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Oven Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

#1 Select Program #2 Set Cook Temperature #3 Set Timer/Core Temperature (option) #4 Set Humidity Level #5 Program Start/Stop #6 Shut-Down

2.9 Advanced Combitherm Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Unlocking and Locking Cooking Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Locking Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Operating a Locked System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Switching Between Celsius & Fahrenheit Temperature Settings . . . . . . . . . . . . . . . . . . . . . . . . . .15

Programming Cooking Sequence(s) into Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Editing/Deleting a Program Step . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Cooking/Operating with Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Recall Program Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

2.10 Helpful Cooking Hints • Steam • Convection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

2.11 Combitherm Gas Operation Schematic • Combitherm Gas Plumbing System . . . . . . . . . . . . . . . . .17

SECTION 3 - MAINTENANCE

3.1 Daily Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Empty Drip Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Clean Oven Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Units without Automatic Clean Cycle Units with Automatic Clean Cycle

Cleaning the Outside of the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

3.2 Weekly Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Door Gasket

3.3 Monthly Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Cleaning the Cooking Chamber

Disassembling & Cleaning the Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Re-assembling the Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Cleaning the Water Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Cleaning the Drain Trap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Cleaning the Flue Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

SECTION 4 - SERVICE & PARTS

4.1 Service Contract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

4.2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

4.3 Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22,23

4.4 Gas Combitherm Photograph with Exterior Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

4.5 Left Side Components - Model 6•10, 7•14, 10•10, 10•20, and 12•18 . . . . . . . . . . . . . . . . . . . . . . . . . .25

4.6 Left Side Components - Model 20•20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

4.7 Wiring Diagram • Models 6•10, 7•14, 10•10, 10•20 and 12•18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

4.8 Wiring Diagram • Model 20•20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

4.9 Transportation Damage & Claims • Alto-Shaam Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Page

Upon receipt of the Combitherm Gas combination oven/steamer, check the exterior of the shipping crate for any physical damage that could result in damage to the contents. If the oven was not received from the carrier in an upright position, there is a strong possibility of concealed damage. Uncrate the unit carefully and inspect for any transit damage. Immediately report any damage to the delivery freight carrier.

See Transportation Damage

and Claims

section located in this manual.

The oven must remain on the pallet while being moved to the installation site by fork-lift or pallet-lift truck.

Check to ensure that all items have been received with each unit. Save all information and instructions packed inside the unit. Complete and return the warranty card to the factory as soon as possible to assure prompt service in the event of a warranty parts and labor claim.

Note that all claims for warranty must include the full model number and serial number of the unit.

In order to eliminate any operation problems and to insure proper operation, the installation of this oven must be done in accordance with the instructions given in this manual by a qualified installer. Failure to do so may cause damage to the oven and building, or cause personal injury to personnel.

The following requirements are needed for installation of the this oven: Air Supply, Electrical Connections, Water Connections, Gas Connections, Gas Exhaust, and Waste Water Discharge.

The gas appliance installation must be done in accordance with local codes, and in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1 (latest edition). In Canada, the appropriate code is the Natural Gas Installation Code, CAN/CGA-B149.1 or the Propane Installation Code, CAN/CGA-B. These codes must be adhered to by a qualified installer concerning: Gas Plumbing, Gas Appliance Installation, Commercial Cooking Ventilation, Water and Plumbing, and OSHA Regulations.

The installation surface must be heat resistant and noncombustible. See your local codes or the National Fuel Gas Code for the definition of combustible and non-combustible construction.

Stand unit in level position. The adjustable feet can be used to overcome an uneven floor to ensure that the unit is level.

It is strongly recommended that table top models be on the original stand or one that is stable, open, level, and noncombustible. Recommended height is 23 inches (620mm).

Adapt the height of the floor models for easy "roll-in" of the trolley or cart. Ensure that the unit is level, right-to-left and back-to-front.

Note: Some units can be stacked on top of each other – but this

process must be done at the factory

Correct positioning Incorrect positioning

Clearance to left side wall is 8 inches (203mm). Clearance to right side wall is 6 inches (152mm). Clearance to rear wall is 1 inch (25mm). These clearances apply whether the construction wall type is combustible or non-combustible.

In order to provide sufficient clearance for service, 20 inches (508mm) must be allowed on the left-hand side of the unit. If this clearance cannot be provided, it will be necessary to disconnect the gas, water and drain connection in order to move the oven via a lift truck to gain access for servicing, and this will not be covered by warranty.

Do not install the oven within 20 inches (508mm) of another heat producing appliance such as a fryer, or open top range, etc., since the heat from these appliances may cause damage to the controls of this oven, and this will void the warranty.

EXHAUST GAS/FLUE DIVERTER Install the diverter piece as shown. Make sure the wire screen is in place before attaching with enclosed screws.

SOUND ABSORBER Screw the sound absorber onto the threaded nipple on the top back left side of the oven.

DRIP TRAY Fasten the drip tray support with two screws (if necessary) on Models 6•10 and 10•10. The drip tray can then be hung from the drip pan support.

HAND SHOWER HOLDER Remove the left side panel. Fasten the hand shower holder, using four nuts and washers. Replace the left side panel.

GUIDE RAILS (

FOR OVENS WITH CARTS)

Mount the rear support

 using

two bolts with washers and spring washers

 at the rear under the

unit. Fit the guide rails

 with the

welded studs in the slotted holes in the rear support

 and fasten using

nuts, washers and spring washers



from the back (do not tighten, leave loose). Then attach the rails at the front of the unit on the unit base using two bolts with washers and spring washers

. Push the trolley into the unit; center it and

close the door. Push the guide rails

 at the rear so that they touch

the cart. Tighten the nuts

 so that the rails are locked in this

position. Check to see that the seal between the oven and cart make a good contact over its total length.

Installation of this oven must provide an adequate flow of fresh air for the combustion of the gas. The bottom of the oven is the area that is used for supplying air for combustion purposes. Instructions must be left with the user to keep this area clear of material which might block the flow of the combustion or ventilation air to the oven.

Make sure that the oven has plenty of ventilation air around it to provide cooling air for the electrical and gas components. The area around the oven should be clear of any obstructions which might retard the flow of cooling air. Failure to do so may result in

Installation • Section 1

1.1 - DELIVERY/UNPACKING

1.2 - INSTALLATION REQUIREMENTS

1.3 - CODES & STANDARDS

1.4 - UNIT PLACEMENT

1.5 - CLEARANCES

1.6 - ASSEMBLY

oven front

1.7 - AIR SUPPLY

Operation and Care Manual #6011 • 1

damage to the control components and will void the warranty.

Do not use circulating fans on the floor as this will cause the loss of pilot flame and affect burner operation.

Local codes and the National Fuel Gas Code give rules for determining the amount of fresh air necessary for combustion and ventilation of commercial cooking appliances. The codes will help determine if additional outside air may be necessary to meet health and safety regulations.

Ensure that the electrical supply matches the specification on the oven data plate. Gas models available for USA and Canada are typically rated for 110-120V, 60Hz, 1Ph. An electric cord is supplied and is ready to use. Fuses are located inside the unit at the left-hand side. The oven must be electrically grounded in accordance with local codes, or in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70 (latest edition) or in Canada with the Canadian Electrical Code, CSA C22.1. The installation of any wiring or electrical connections must be done by a licensed electrical contractor.

Continued.........above.

The oven must be connected to a COLD water supply of

potable (drinkable) quality.

The on-site water supply must have a shut-off valve. If local regulations require a back-flow preventer, have this installed.

Always observe local water regulations.

A water conditioner is highly recommended, especially if the water hardness is

NOT pH5 and 9. Please contact the factory for

assistance with a water conditioner.

The water pressure requirements are a minimum of 30 psi and a maximum of 120 psi. The connecting pipe is 3/4" and is under the unit.

ELECTRICAL CONNECTIONS continued....

ACCESSING CONTROL AREA

To access the electrical/control system, make sure to disconnect power and ensure the gas supply is shut OFF before removing the left side panel.

The electrical diagram is affixed inside the left-hand side control area. A copy of the electrical diagram is shown at the back of this manual. Service or changes must be done by a licensed electrical contractor and in accordance with local codes and regulations.

The oven must discharge through an indirect waste pipe by means of air gap, i.e., vacuum break. If such piping is not provided, serious damage can occur to the unit and to the cooking product.

CONNECTION

Install the elbow provided. Make certain the washers provided are used. An illustrated example of water drainage for the Gas Combitherm is shown.

Operation and Care Manual #6011 • 2

1.10 - WASTE WATER DISCHARGE

1.9 - WATER CONNECTION

ASSEMBLY

The water connection is installed in conjunction with the hand

shower spray. In the illustration below, all connections indicated with the symbol

✿ are to be assembled with teflon sealing tape.

A. Screw T-piece onto the unit water supply inlet.

B. Assemble double nipples and water tap, and hose.

C. Slide O-ring over the threading from the hand shower.

D. Screw together the hose, seal, and the hand shower.

E. Hang the hand shower in its holder on the unit.

F. Screw the hose and filter onto the cold water connection.

G. Do not forget the filter!

Installation • Section 1

1.8 - ELECTRICAL CONNECTIONS

The installation of this oven must be done by a qualified installer familiar with the local codes and regulations governing the installation of commercial gas appliances.

The installation must be done in accordance with local codes, and in the absence of local codes, with the National Fuel Gas Code ANSI Z223.1 (latest edition). In Canada, the appropriate code is the Natural Gas Installation Code, CAN/CGA-B149.1 or the Propane Installation Code, CAN/CGA-B.

GAS TYPE & PRESSURE

Check the oven nameplate information to determine the type of gas the Combitherm Gas Oven/Steamer was manufactured for (natural or propane) and make sure the gas supply matches the nameplate information.

Check the nameplate to determine the gas manifold pressure for the oven. The minimum supply pressure to the oven must exceed this value by at least 1" w.c. It is recommended that the supply pressure be between 5" w.c. and 14" w.c. for natural gas, and 11" w.c. and 14" w.c. for propane.

An alternate gas supply inlet may be required for installation sites at elevations of 3,000 feet (914m) above sea level. Please check with factory.

Should conversion to the opposite fuel be desired, conversion

parts must be ordered from the factory.

Conversion must be done by

a qualified service person only.

Always remember to reflect the

conversion on the oven's nameplate.

GAS CONNECTION

The minimum size of the gas piping or flexible connector is 1/2" except for the Model 20•20 which is 3/4". For long runs of gas piping, the pipe diameter must conform to the tables in the National Fuel Gas Code, ANSI/NFPA Z223.1.

A listed gas shut-off valve must be installed upstream of the appliance for shutting off the gas supply during servicing. This valve should be installed so that it is accessible with the appliance in its normally installed position.

If the oven or its stand is supplied with casters – the installation must be done with a flexible connector that complies with the Standard for Connectors for Movable Gas Appliances, ANSI Z21.69; or in Canada, Connectors for Movable Gas Appliances, CAN/CGA-6.16-M87. When using a flexible connector, a quick disconnect device must also be used that complies with the Standard for Quick-Disconnect Devices for Gas Fuels, ANSI Z21.41; or in Canada, Quick Disconnect Devices for Use with Gas Fuels, CAN1-6.9.

When a quick disconnect device and flexible connector are used, a restraining device must be used which will limit the movement of the appliance to prevent damage to the connector or quick disconnect. An example of such a system is to use 2000 pound test stainless steel cable attached to a structural member of the kitchen wall behind the oven. The attachment means should have a quick connect snap such that it can be disconnected when the appliance needs to be moved away from the wall. The other end of the cable

should be permanently attached to the rear frame of the oven. The length of the cable should be such that no strain is ever placed upon the flexible gas connector if the appliance is accidentally moved without first disconnecting the gas connector.

The flexible connector should be routed

so that it forms a downward "U" loop between the building gas supply and

where it attaches to the rear of the oven.

The routing of the flexible connector must not be done under the oven. The temperatures during operation are too hot for safe operation. Gas piping should be installed from the point of gas connection at the bottom, front of the oven to the back of the oven where the flexible connector may be used. See the illustration for the recommended procedure.

LEAK

TESTING

If a pressure leak test above 1/2 psi is to be done on the building supply gas piping, the shut-off gas valve and oven inlet gas supply line must be disconnected from the building supply piping

before conducting the pressure test. Failure to do so may result in damage to the manual gas valve and/or gas components in the oven.

If any gas leak tests are to be conducted at pressures equal to or below 1/2 psi, the manual gas shut-off valve upstream of the oven must be turned off before conducting the tests.

Leak testing of the internal oven piping system was conducted before shipping the oven from the factory. If additional testing is needed, it should only be conducted at normal gas supply pressures. If the testing is performed using combustible gas in the piping, the leak checking should be done with a soap solution (bubble checking).

NEVER CHECK FOR LEAKS USING AN OPEN FLAME.

The use of electronic combustible gas leak detectors is

helpful, but they can be oversensitive. They may find leaks that are not visible when checking with a liquid solution,

and therefore, present no hazard.

When starting unit after initial installation, the gas lines must be free of air. It may take up to 30 minutes to do this. If, after this time there is no pilot, call for factory assistance.

FUEL INTERLOCK SYSTEM

Local codes may require that the fuel supply to the oven be interlocked to the ventilation hood. If that is the case, a separate electrically operated gas valve must be installed in the gas line. The selection of the valve will be up to the installer, but the valve should be recognized by the authority having jurisdiction.

The oven is not for direct connection to a chimney vent system

or for direct connection to a horizontal exhaust system. The oven must be installed under a ventilation hood listed to ANSI/UL 705 (latest edition), and the installation must be done in accordance with the ANSI/NFPA 96-1987, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations.

The oven is supplied with a flue diverter that must be installed on the oven prior to installation.

See Assembly at the front of this

manual.

The operators of the oven should be instructed not to place any material on top of the oven that would obstruct the flow of flue products out the opening. They should also be instructed that the flue gases are hot, and that any material or items they place on top of, or in front of the flue defector could be damaged or cause fire hazard.

TION

GUIDELINES

Operation and Care Manual #6011 • 3

1.11 - GAS CONNECTIONS

1.12 - GAS EXHAUST

Installation • Section 1

The gas piping must never be run under the

burner––there is danger of overheating.

The gas valve, pilot burner and nozzles for the main burner have been fitted according to the gas type

specified on the name plate. Technical specifications for the gas system are as follows:

Combitherm 6•10 7•14 10•10 10•20 20•20

Gas Model 12•18

Natural Gas

Connected pressure rating 7 in. W.C. 7 in. W.C. 7 in W.C. 7 in W.C. 7 in W.C.

Min. connected pressure 5 in. W.C. 5 in. W.C. 5 in. W.C. 5 in. W.C. 5 in. W.C.

Max. connected pressure 14 in. W.C. 14 in. W.C. 14 in. W.C. 14 in. W.C. 14 in. W.C.

Nozzle pilot burner —————

Nozzle burner 220 315 280 400 400

Manifold pressure 3.5 in. W.C. 3.5 in. W.C. 3.5 in. W.C. 3.5 in. W.C. 3.5 in. W.C.

Gas Consumption 45 cu.ft/hr 81.9 cu.ft/hr 67 cu.ft/hr 112 cu.ft/hr 168.1 cu.ft/hr

Gross thermal output 45,500 Btu/hr 82,000 Btu/hr 68,000 Btr/hr 113,000 Btu/hr 170,000 Btu/hr

Propane Gas

Connected pressure rating 11 in. W.C. 11 in. W.C. 11 in. W.C. 11 in. W.C. 11 in. W.C.

Min. connected pressure 11 in. W.C. 11 in. W.C. 11 in. W.C. 11 in. W.C. 11 in. W.C.

Max. connected pressure 14 in. W.C. 14 in. W.C. 14 in. W.C. 14 in. W.C. 14 in. W.C.

Nozzle pilot burner

—————

Nozzle burner 135 190 170 220 220

Manifold pressure 10 in. W.C. 10 in. W.C. 10 in. W.C. 10 in. W.C. 10 in. W.C.

Gas Consumption 17.7 cu.ft/hr 32.9 cu.ft/hr 26.5 cu.ft/hr 44.1 cu.ft/hr 66.5 cu.ft/hr

Gross thermal output 45,500 Btu/hr 82,000 Btu/hr 68,000 Btu/hr 113,000 Btu/hr 170,000 Btr/hr

1.13 - PRESSURE CHART

Installation • Section 1

Operation and Care Manual #6011 • 4

Operation and Care Manual #6011 • 5

When starting the unit after initial installation, the gas lines must be free of air. It may take up to

30 minutes to do this. If, after this time there is no pilot, call for factory assistance.

For all practical reasons this will be the only check necessary during initial operation by the installer. After the installation is complete the oven needs to be test fired to ensure that the system is operating properly. Follow the operating instructions posted on the front of the unit.

The flame pattern both under hot and cold conditions should be stable on all burner ports and there should be no lifting or blowing after 15 seconds of operation. There is no air shutter adjustment on these burners and if the flame pattern does not match that shown, contact the factory for further directions.

Make sure that the pilot burner is lighting quickly from the electric ignitor. Then make sure that the main burner is lighting quickly (within 4 seconds), smoothly (no harsh noise), and without any problems. While the oven is COLD, cycle the oven ON and OFF five times to make sure everything is working properly. Allow the unit to heat up for 5 minutes and repeat the process.

Check the flame pattern on the burners. The flames should be blue in color with little or no yellow in the flame. On propane gas some yellow tipping is normal, but there should be no indication that soot will form on the combustion chamber walls, pilot or main burner from the yellow tipping.

Installation • Section 1

1.14 - GAS FLAME PATTERNS

Units equipped with intermittent pilot-based operation are fitted with a Honeywell gas valve. The gas valve has a built-in pressure regulator and a hot surface intermittent pilot ignition control for safe operation. The valve has a step open feature (standard) for natural gas operation. For propane, a full open feature is standard. Explanation of the gas valve is shown in the illustration.

Step #1 - CHECKING PRESSURE

A. Turn gas connection OFF. Open gas inlet pressure

connection cap and unscrew the tap. Connect pressure gauge at pressure tap. Read pressure.

B. If pressure measured is higher or lower than that specified

in the Pressure Table located in this manual, do

not proceed

with initial operation.

C. Remove pressure gauge, screw in the tap and close with

protective cap.

Step #2 - ADJUST PILOT BURNER

The pilot burner assembly installed in your unit is tested prior to shipment and does not require any adjustment. If adjustment is desired, follow these instructions.

This

step must be performed

by a

qualified person only.

A. Turn main power switch ON, and switch the ignition

control switch on the gas valve to ON position.

B. Set temperature and timer and press the START/STOP key.

Follow oven operational instructions.

C. The pilot flame should be lit and blue in color with no or

very little yellow peaks.

Step #3 - MANIFOLD PRESSURE ADJUSTMENT

The gas valve has a built-in pressure regulator and regulates the manifold pressure according to specification presented in the Pressure Table in this manual. The valve requires no adjustment. However, if adjustment is desired, follow the instructions below.

This must be performed by a qualified person only.

A. Turn power and gas supply OFF.

B. Remove protective cap from outlet gas/manifold gas tap.

Unscrew, connect pressure gauge.

C. Turn main power switch ON, and switch the ignition

control switch on the gas valve to ON position.

D. Select program, set temperature and timer, and press the

START/STOP key. Follow oven operational instructions.

E. The gas valve will open and the main burner flame should

be established.

F. Measure manifold pressure. If it requires adjustment, open

the cap on the pressure regulator and adjust the screw for increased or decreased gas pressure.

O NOT SET THE REGULATOR TO ANY OTHER SETTING

OTHER THAN TO THE DATA SPECIFIED IN THE

PRESSURE CHART IN THIS MANUAL.

G. Turn the gas valve OFF or to PILOT position.

H. Close pressure regulator and manifold/outlet gas tap with

protective caps.

NOTE: If you do not understand this procedure, do not perform

any changes. Call the factory for assistance.

Step #4 - IGNITION & BURNER CHECK

The flame pattern both under hot and cold conditions should be stable on all burner ports and there should be no lifting or blowing after 15 seconds of operation.

See the illustration in this manual for

the proper flame pattern.

There is no air shutter adjustment on these burners and if the flame pattern does not match that shown, contact the factory for further directions.

Step #5 - VERIFY SEQUENCE OF OPERATION

When the Gas Combitherm is fitted with an intermittent pilot and a Honeywell gas valve, the system is ready for automatic pilot ignition and main burner ignition. The ignition control system will routinely undergo three ignition trials (for pilot burner ignition) before identifying an ignition failure to timeout. The normal sequence of operation is illustrated on the following page of this manual.

When starting unit after initial installation, the gas lines must be free of air. It may take up to 30 minutes to do this. If, after this time there is no pilot, call for factory assistance.

Operation and Care Manual #6011 • 6

1.15 - I NTER MITTE NT PILOT - HON EYWELL

Installation • Section 1

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