Nieco 980G User manual

AUTOMATIC
FOODSERVICE
EQUIPMENT
INSTALLATION AND USER
MANUAL
FOR CE APPROVED AUTOMATIC GAS BROILERS
FOR MODELS:
980G, 950G, 930G
885G, 880G, 850G
824G, 650G, 624G

2
WARNING
1. Do not store or use gasoline or other flammable vapors or liquids in the
vicinity of this or any other appliance.
2. Broiler area must be kept free of combustible materials, and the flow of
combustion and ventilation air must not be obstructed. Operating personnel
must not perform any maintenance or repair functions. In these cases,
contact your Nieco Authorized Dealer.
3. Do not use this appliance in an area where a water jet could be used.
4. Do not clean the appliance with a water jet.
5. If the power supply cord is damaged, it must only be replaced by a repair
shop appointed by the manufacturer.
6. It is recommended that walls in the proximity of the appliance be made of
non-combustible material. If not, the surface of these walls must be made of
a suitable non-combustible heat-insulating material. Make sure that all local
and national fire-prevention regulations are met.
IMPORTANT: RETAIN THIS MANUAL
IN A SAFE PLACE FOR FUTURE REFERENCE
!

INSTALLER NOTES
1. This appliance is rated IP 20, Degree of Protection obtained from Enclosure.
2. Nominal Power Rating: 230V AC 1~ 50 Hz
Model kW Electrical Diagrams
980G, 880G, 885G 5.5 8418
950G, 824G, 850G 4.1 8418
930G, 624G, 650G 3.1 8418
3. This appliance must be installed by a qualified installer, in compliance with all
national, local regulations and institutions having jurisdiction.
4. The manual gas control valve is to be furnished by the installer and must be placed
in a clear accessible location.
5. This machine should be connected to the supply with a plug with proper grounding.
3

4
Table of Contents
A. General Information....................................................................................................................5
Description
B. Machine Installation ...................................................................................................................6
B.1 Pre-Installation...................................................................................................................6
B.2 Mounting ............................................................................................................................6
B.3 Leveling..............................................................................................................................6
B.4 Hood Requirements...........................................................................................................6
B.5 Clearance...........................................................................................................................6
B.6 Gas Connection .................................................................................................................7
B.7 Electrical Connection .........................................................................................................7
B.8 Pre-Operation Check .........................................................................................................7
C. Operation.....................................................................................................................................8
C.1 Controls and Indicators......................................................................................................8
C.2 Gas Pressure Adjustment..................................................................................................8
C.3 Step-by-Step Lighting Procedure.......................................................................................9
C.4 Shutdown Procedure .........................................................................................................9
C.5 Automatic Temperature Control.......................................................................................10
C.6 Bun Grilling Platen...........................................................................................................10
C.7 Food Preparation, Cooking and Handling Practices........................................................10
D. Assembly/Disassembly and Cleaning....................................................................................11
D.1 Daily Cleaning..................................................................................................................11
D.2 Weekly Cleaning..............................................................................................................13
E. Conveyor Belt Removal ...........................................................................................................14
F. Conveyor Belt Tension.............................................................................................................15
Broil Belt Problems
G. Parts and Location ...................................................................................................................16
G.1 Model 980, 880................................................................................................................16
G.2 Model 950, 824................................................................................................................18
G.3 Model 930, 624................................................................................................................20
G.4 Model 885........................................................................................................................22
G.5 Model 850........................................................................................................................24
G.6 Model 650........................................................................................................................26
H. Trouble Shooting Guide...........................................................................................................28
I. Specifications ...........................................................................................................................31

5
A. General Information
Gas Models 980G, 885G, 880G, 950G, 850G, 824G, 930G, 624G and 650G
Description
The Nieco Automatic Gas Broiler is a compact self-contained unit designed to broil hamburgers or other
food products by use of a conveyorized cooking section. In addition, these broilers are equipped with a
bun grilling section which caramelizes the buns to a golden brown.
The hamburgers and buns are loaded on the feed end and come out on the discharge end of the broiler.
The hamburgers pass between radiant gas burners and the buns pass between an electrically heated
bun platen. Flame broiling makes the food taste great, and the unique Nieco system offers unmatched
product quality and consistency.
Models 980, 880, and 885 use a total of 8 gas burners - 4 on top and 4 on the bottom. Models 950, 824,
and 850 use a total of 6 gas burners - 3 on top and 3 on the bottom. Models 930, 624, and 650 use 4
burners - 2 top and 2 bottom. All models utilize Nieco’s Automatic Temperature Control system to assure
proper cooking in periods of high volume usage.

6
B. Installation
B.1 Pre-Installation
Uncrate the broiler and inspect for shipping damage. Remove the tape securing the machine parts, and
install the parts in their proper location. Refer to the Parts and Location section of this manual. If there
are obvious or concealed damages to any part of the broiler, please contact your freight carrier. The fac-
tory warranty does not cover freight damage.
B.2 Mounting
If the broiler was shipped with a tubular stand, refer to separate tubular stand assembly instructions.
B.3 Leveling
The grease drain system is based on a gravity-flow design. Therefore, it is extremely important to level the
broiler during installation.
B.4 Hood Requirements
This appliance must be installed under a ventilation hood of adequate size and the following minimum
capacity: Model m3/h
980, 880, 885 1869
950, 824, 850 1360
930, 624, 650 1020
The hood should be at least 152 mm (6") larger in side dimensions than the broiler, and be 305mm (12”)
to 457 mm (18”) above the top. Do not obstruct the flow of combustion and ventilation air. An adequate
air supply must be available for safe and proper operation.
B.5 Clearance
For proper installation the minimum clearance from combustible and non-combustible construction must
be 152 mm (6”) from the back and 152 mm (6”) from the front of the machine. Keep appliance area free
from combustibles.
To facilitate disassembly and service of the unit a minimum of 610 mm (24”) should be allowed on the
control panel (right) side of the broiler, as well as in front and back of the broiler.
B.6 Gas Connection
*152 mm (6”) Minimum, preferably 610 mm (24”) or more for service.

7
At rated input the gas supply should deliver a pressure of at least 20 mbar (8" water column) at the broil-
er connection for natural gas and 37 mbar (14.8" water column) for propane gas. Incoming gas supply
pressure must not exceed 50 mbar (20" water column) for either type of gas.
Note: Appliance installation must conform with all local codes. Check all fittings for gas leaks,
including pilot tubing and inlet connections as soon as the appliance is connected to the gas
supply.
Note: This appliance must be isolated from the gas supply piping system during any pressure
testing of the gas supply piping system with test pressure of 3.45 kPa (0.5 psig) or more.
B.7 Electrical Connection
Power requirements are stated on the unit nameplate and must be connected accordingly. Before start-
ing broiler, tighten all electrical connections in control box. An electrical wiring diagram can be found
inside the control box.
Note: Disconnect power before servicing.
B.8 Pre-Operation Check
Be sure that all parts are installed in the proper location.

8
Pushbutton Safety Valves
Pilot Ignitor
(Red push button)
5 Amp Fuse
Bun Platen Thermostat
Gas Pressure Gauge
Motor Breaker Switch
Motor Speed Control
Main On/Off Switch
Power On Indicator Lamp
(Red light)
High Gas Indicator Lamp
(Amber light)
C. Operation
C.1 Controls and Indicators
1. Gas Pressure Taps.
2. Low Gas Pressure Adjustment:
Remove dust cap. Turn Low Gas pressure
adjustment screw clockwise to increase gas
pressure. Turn counter-clockwise to
decrease gas pressure.
3. High Gas Pressure Adjustment:
Remove dust cap. Turn High Gas pressure
adjustment screw clockwise to increase gas
pressure. Turn counter-clockwise to
decrease gas pressure.
4. Be sure to replace dust caps after
adjustment.
Broiler
(Right Side View) Gas Control Valve
P/N 2210
(Top view)
C.2 Gas Pressure Adjustment
Recommended Settings:
Natural Gas - Propane -
Low 7.5 mbar (3”) Low 20 mbar (8”)
High 12.5 mbar (5”) High 27.5 mbar (11”)

9
C.3 Step-by-Step Lighting Procedure
Before lighting make sure that all parts are installed in the proper location, all controls are turned off, and the ventilation
hood fan is turned on.
1. Turn on Main Power Switch (A).
2. Turn on Motor Switch (B).
3. Set Motor Speed Control knob to desired
setting (C).
4. Set the Bun Platen Thermostat to the desired
setting (D). Use a setting of 230°C (450°F)
to start.
Open the Manual Gas Valve. The valve is
open when the handle is in-line with the pipe.
5. Push and hold the Lower Pushbutton Safety
valve. This will start the flow of gas to the pilot
lights. While holding in the button, push the
Ignitor button on the front of the control box
(E). After the pilot lights, hold the valve in for
30 seconds to allow the thermocouple to heat.
When you release the Pushbutton, the lower
pilot light should remain lit.
6. Repeat this procedure with the Upper
Pushbutton Safety Valve to ignite the upper
burners (F). When the Pushbutton is
released, the burners should light. If the
ignitor is not working, use a long-stem lighter
to manually light the pilot.
7. After lighting the broiler, check the gas
pressure to be sure it is adjusted to the levels
stated on the machine rating plate. Allow the
broiler at least 30 minutes to warm up.
(A)
(E) (F)
(B)
(C) (D)

10
C.4 Shutdown Procedure
For EMERGENCY shutdown: Turn off the Main Power switch and shut off the Manual Gas Valve.
For PLANNED shutdowns: Clear machine of all food products, and turn the Motor and Main Power switches off.
CAUTION: Turn all appliance switches off before disconnecting cord from power supply.
C.5 Automatic Temperature Control (ATC)
The Nieco Automatic Temperature Control (ATC) is a system that operates the broiler at two different energy input rates:
High energy input (high gas) for initial warm-up and periods of high volume and low energy input (low gas) for regular
operation. This dual input rate and the ATC allow the broiler to operate at a very consistent temperature throughout the
day and thus provide a very consistently broiled product. Since the broiler will remain on the lower input rate (low gas)
most of the day, a substantial energy savings is realized.
The ATC system consists of a dual rate Automatic Main Control Valve (AMCV) that on command changes the gas input
electronically. A temperature probe senses the temperature at the loading end of the broiler and signals it to the control
unit. The control unit causes the AMCV to change the input rate. When the broiler is in the High Gas input mode an
amber light appears on the control panel.
Under heavy product loads the temperature sensed by the ATC probe will drop low enough to cause the ATC to signal for
a higher input rating. The ATC will keep the broiler in the high gas mode until the temperature sensed by the probe
returns to the lower calibrated setting.
Calibrating the ATC
1. Loosen the control knob lock screw and set the ATC control knob to 315°C (600°F).
2. Turn on the Main Power Switch.
3. Turn on the Motor Power Switch.
4. Light the broiler following the procedure in this manual.
5. The broiler should be in high gas mode at this time (Amber light on).
6. When the broiler reaches 315°C (600°F), the high gas will shut off and the broiler will be in low gas operation.
7. 40 minutes after lighting the broiler, slowly turn the ATC control knob up (clockwise) until the high gas clicks on.
This is the idle temperature of the broiler.
8. As soon as the high gas turns on, slowly turn the ATC down (counter clockwise) 5°C (10°F) to 10°C (20°F) below
the point where the high gas turns on.
9. Tighten the control knob lock screw to prevent accidental movement.
10. The control knob setting may need a minor adjustment on the first day of use in order to maintain 5°C (10°F) to
10°C (20°F) below the normal idle temperature. Once the adjustment is correct, the settings do not need to be
changed unless the broiler’s operating conditions change. DAILY SETTINGS ARE NOT REQUIRED.
WARNING
Never set the ATC control knob at a setting high enough to keep the broiler in high gas pressure. The machine may be
damaged, energy costs will be much higher, and some broiler parts may wear out prematurely.
C.6 Bun Grilling Platen
The Models 980G, 880G, 885G, 950G, 824G, 850G, 930G, 624G and 650G are equipped with independently adjustable
dual bun grilling platens. The clearance of each platen can be adjusted by turning the black handles located directly
above the platens at the feed end of the machine. Frequent adjustments should not be necessary.
C.7 Food Preparation, Cooking and Handling Practices
Established guidelines for safe food preparation, cooking and handling should be adhered to rigidly. The Nieco Automatic
Broiler is very consistent in cooking. Check the temperature of the meat cooked frequently to assure that the broiler is set
up properly.

11
1. Remove the Side Panels by lifting up and
off (A). Wipe clean with a degreaser.
FROM THE FRONT OF THE BROILER
2. Remove the Patty Feeder by lifting up and
out (B). Clean daily by using soap and
water.
3. Remove the Upper Burner Front Reflector
(C). Clean daily by using soap and water.
4. Remove the Grease Pan by sliding it out the
front (D). Clean daily by using soap and
water.
5. Remove the Belt Scraper (E). Notice the
position it sits in before removing, so that
you can replace it properly. Clean daily by
using soap and water or degreaser.
6. Scrape the shafts with the special tool pro-
vided or with a flat head screwdriver (F).
FROM THE LEFT SIDE OF THE BROILER
7. Remove the Grease Chute and Grease
Box (G). Clean daily by using soap and
water.
D. Assembly / Disassembly and Cleaning
TURN OFF POWER BEFORE BEGINNING CLEANING AND DISASSEMBLY
Clear machine of all food products. Allow the machine to run empty for ten minutes in order to burn off the residue on the
belt. Turn Main Power and Motor switches off. Allow the machine to cool before beginning disassembly.
(A) (B)
(C) (D)
(E) (F)
(G)
D.1 Daily Cleaning

12
9. Remove the Burner Access Cover (H).
10. Slide the Lower Burners out and remove the
Protective Shields (I). Clean the shields by
scraping off any built-up residue, then soak
in soap and water. Clean the shields daily.
This will help to prolong the life of the burn-
ers and keep the broiler cooking properly.
FROM THE BACK OF THE BROILER
11. Remove the Awning by lifting up and off (J).
Clean daily by using soap and water.
12. Remove the Patty Discharge Pan and Insert
(K). Clean daily by using soap and water.
13. Remove the Stripper Blade (L). Scrape off
any built residue, soak in soap and water
and sanitize.
14. Remove the Lower Burner Reflector (M).
Notice the position of the piece before
removing it, so that you can re-install it
properly. Clean by soaking in soap and
water.
15. Make sure to assemble all parts correctly
after cleaning.
(H) (I)
(J) (K)
(L) (M)

13
D.2 Weekly Cleaning
1. Remove the Lower Burners through the access
hole in the side of the broiler (A).
Clean the Distributor Screen and Venturi in the
same fashion as the Upper Burners. Refer to
instruction 2 below.
2. Remove the Upper Burners (B) and clean
weekly as follows:
B. Clean Distributor Screen with a stiff
bristle brush (2.B).
HOLD BURNER WITH THE
SCREEN FACING DOWN WHILE
BRUSHING. This prevents particles
from dropping down and lodging
inside the burner.
C. Clean Burner Venturi with a stiff
bristle brush (2.C).
HOLD BURNERS SO THAT
PARTICLES WILL NOT DROP
INSIDE.
DO NOT SOAK OR SUBMERGE THE BURNERS IN WATER. WATER WILL DAMAGE THE GASKET SEAL AND
WILL CAUSE IMPROPER BURNER PERFORMANCE.
3. Wipe off the frame and other internal parts of the broiler. Do not spray anything (i.e. oven cleaner) inside the broiler.
A. Remove Reverberator and clean
with a stiff bristle brush (2.A).
REPLACE REVERBERATOR
AT THE FIRST SIGN OF
BREAKAGE.
(A)
(B)
(2.A) (2.B) (2.C)

14
1. Run belt until the Master Link is near the
front idler shaft (A).
2. Lift shaft and Teflon Blocks up and slide the
blocks out (B).
3. Unhook the Master Link (C).
E. Conveyor Belt Removal
To reassemble the belt, reverse the procedure. Be sure to reassemble the belt so that the knuckle opening is facing away
from the direction of travel.
Before removing the conveyor belt notice the way the belt runs through the broiler. Also notice the direction the knuckles
face. Be sure to reassemble in the same way.
BELT DIRECTION CONVEYOR BELT MASTER LINK
FEED END
(B)
(A)
(C)

15
F. Conveyor Belt Tension
Maintain proper tension on the meat and bun conveyor belts to prevent jamming. Bearing spacers (pic-
tured below) are supplied with the broiler to make minor tension adjustments. Major tension adjustments
are made by removing one or more links from the belt.
The diagram on the left shows the spacer in the stored position. The diagram on the right shows the
spacer behind the teflon bearing tightening the belts.
Belt tension should be checked monthly. To do this, allow the machine to cool, then grip the idler shaft at
each end and pull on it. If the shaft and the bearings move 5 mm (3/16”) or more, place the spacers
behind the bearings to tighten the belt. If the spacers are already behind the bearings, return them to the
stored position and remove a link from the conveyor belt.
Meat Belt Problems
Interference with the stripper blade:
The most common belt problem to be expected is the physical interference of the belt with the
stripper blade. This is caused by bent or warped rods on the meat belt and can be fixed by replacing
the rods that are causing the problem. Other causes are bent stripper blades or utensils jammed in
the belt.
Blocked belts:
Be sure the meat belt is not blocked when examining the broiler for drive problems. To do this,
detach the drive chain and turn the meat belt by hand. The belt, with the motor detached, should turn
freely and easily. If the belt does not turn freely, then remove any blockage before the drive chain is
re-attached. The drive chain can be easily removed from the drive sprocket (on the motor shaft) by
loosening the mounting bolts and raising the motor.

16
G. Parts and Location
G.1A Models 980, 880 Gas - Feed End View
G.1 Models 980, 880 Gas

17
G.1C Models 980, 880 Gas - Left Side View
G.1B Models 980, 880 Gas - Right Side View

18
G.2A Models 950, 824 Gas - Feed End View
G.2 Models 950, 824 Gas

19
G.2B Models 950, 824 Gas - Right Side View
G.2C Models 950, 824 Gas - Left Side View

20
G.3A Models 930, 624 Gas - Feed End View
G.3 Models 930, 624 Gas