SERVICE MANUAL SERIAL NUMBERS 2611 AND UP NATURAL GAS AND PROPANE SP8016-1005 ACCU-STEAM SERVICE MANUAL
Technical Services Toll Free Office Fax email Web Site SP8016-1005 800.480.0415 260.469.3040 260.493.8914 service@accutemp.net www.accutemp.
TABLE OF CONTENTS Table of contents 1 Document history 2 INTRODUCTION 3 SEQUENCE OF OPERATIONS 3 TROUBLESHOOTING MATRIX 4-5 REMOVAL AND INSTALLATION - TRANSFORMER 5 REMOVAL AND INSTALLATION - LAMPS 6 REMOVAL AND INSTALLATION - SWITCH 6 REMOVAL AND INSTALLATION - THERMOSTAT 7-8 REMOVAL AND INSTALLATION - TEMPERATURE SENSOR 8 REMOVAL AND INSTALLATION - TIME DELAY RELAY 9 REMOVAL AND INSTALLATION - HI LIMIT ASSEMBLY 9-10 REMOVAL AND INSTALLATION - STANDBY BURNER ( PILOT) 11 REMOVAL AN
Document history Current revision 1005 SP8016-1005 Date 5/14/10 Prior revision Date N/A N/A Change Initial release of manual ACCU-STEAM SERVICE MANUAL PAGE 2
INTRODUCTION The griddle is constructed and uses technology like no other griddle in the world. The griddle cooking surface is the top of a chamber which has a unique environment. Welded stainless steel reinforcements studs connect the chamber top to a chamber bottom. The perimeter joints are all robotically welded and produce a vessel that is air tight. The chamber is filled half full with distilled water. The remaining air is removed and the chamber is welded shut.
TROUBLE SHOOTING MATRIX SYMPTOM Unit is cutting out and / or shutting down POSSIBLE CAUSE Ignition probe EVALUATION Check for oxidation. Clean probes if oxidized. Check for probes being loose in the ceramic. Make sure the ground probe is touching the ceramic part of the heating element and the other two probes should be the height of a nickel off the ceramic.
TROUBLE SHOOTING MATRIX SYMPTOM Unit is over / under temp POSSIBLE CAUSE Thermostat Thermocouple EVALUATION This is a type K thermostat. Check that 24 volts AC is present at terminals 4 & 5. For units with serial numbers 7551 and up, the thermostat will be a RTD type. This is a type K thermocouple (red and yellow leads). Refer to the thermocouple chart for proper measurements. For units with serial numbers 7551 and up, this will be a RTD probe.
REMOVAL AND INSTALLATION LAMPS The lamps are a neon style lamp that is driven by 24vac. 1. Unplug the unit. 2. Remove the three screws from the front door panel and drop the panel down. 3. Remove the wires from the lamps. 4. Depress the locking ears on the lamp with a pair of pliers and push thru the front of the panel 5. Reinstall in reverse order.
REMOVAL AND INSTALLATION THERMOSTAT WARNING - ALL THERMOSTATS MUST BE CALIBRATED TO 400 °F, ( +1 °F,/-4 °F,) 1. Unplug the unit 2. Remove the three screws from the front door panel and drop the panel down. 3. Remove the knob and retaining nut from the front of the panel. 4. Disconnect the wires from the pins on the thermostat. Note their locations. 5. Reassemble in reverse order. Note: Units with serial numbers 2611 to 7550 have a type K thermostat and thermocouple.
REMOVAL AND INSTALLATION RTD THERMOSTAT CALIBRATION The operating temperature range is 200 °F to 400 degrees F. Record the measured griddle surface temperature at the set points of 200 °F, 300 °F and 400 °F to determine if the controller is out of range. The calibration offset potentiometer shifts the range up or down but range or gain width is fixed and cannot be adjusted. If the controller is ± 10 °F out of range, replace it. 1. Open the control panel 2. Plug the unit in and hook up the gas supply. 3.
REMOVAL AND INSTALLATION TIME DELAY RELAY The time delay relay is used to delay a signal to allow for the proper mixture of air and gas before igniting the main burners. 1. Unplug the unit 2. Remove the three screws from the front door panel and drop the panel down. 3. Remove the mounting screw in the middle of the relay and the two wires. 4. Reinstall in reverse order. Note: Make sure the adjustment pot is set for 20 seconds.
REMOVAL AND INSTALLATION SP8016-1005 ACCU-STEAM SERVICE MANUAL PAGE 10
REMOVAL AND INSTALLATION STANDBY BURNER (PILOT BURNER) This device is a small ceramic burned used to ignite the main burners. It also has the ignition probe and flame sense probe. Improper installation can cause the griddle not ignite or intermittently shutdown 1. Unplug the unit and shut off the gas supply and let the unit cool. 2. Loosen the hose clamp on the venturi. 3. Loosen the two nuts that hold the burner spacer and step bracket. 4.
REMOVAL MAIN BURNERS AND INSTALLATION Main burners are a ceramic burner that supplies the required heat to operate the griddle. If the get wet they should be allowed to dry without applying heat as they will crack and will need replaced 1. Unplug the unit and disconnect the gas and let the unit cool. 2. Remove the retaining nut from the gas supply elbow. 3. Remove the four retaining nuts from burner box flange and drop the box down. 4. Clean the orifices. 5.
REMOVAL AND INSTALLATION GAS CONTROL VALVE, MAIN BURNER VALVE AND PRESSURE REGULATOR 1. Unplug the unit and disconnect the gas. 2. Remove the three screws from the front door panel and drop the panel down. 3. Disconnect the union on the left hand side and the fitting on the right hand side of the flex hose. 4. Pull the valves out and replace the defective part. 5. Reassemble in reverse order.
TESTING Flame Sense Measurement The ACCU-STEAM gas griddle has a flame sensing circuit to determine if the system has proper combustion. When the system is turned on gas is sent to the pilot burner and an electronic ignition tries to ignite the griddle. The griddle then checks to see if flame is established in the pilot burner. If the flame sense feedback voltage is within the proper range the system will ignite the main burners and they stay on until the thermostat is satisfied.
TESTing 9. If the pilot burner is lighting, determine if the sensing signal level is 25mV (1.07uA) or higher (see the attached millivolt to micro amp chart). a. If the level is less than 25mV (1.07uA), check for proper gas pressures to the main regulator and to the pilot regulator. For natural gas, the pressures must be 5" H2O for the main gas valve and 3.5" H2O for the pilot burner regulator. For propane gas, the pressures must be 10" H2O for the main gas valve and 8.0" H2O for the pilot burner regulator.
TESTing CHAMBER INTEGRITY TEST Tools Required: • Level • Calibrated Digital Temperature Meter (Such as the Cooper - Atkins EconoTemp • Weighted Temperature Probe - ( Such as Cooper/Atkins) DIgital Temperature Meter & Weighted Temperature Probe Due to the patented design of our griddle it is imperative that the chamber has no leaks as this allows water to escape and air to move in causing inconsistent temperatures on the cooking surface.
Temperature sensor (thermocouple) resistance chart RTD TEMPERATURE SENSOR AT0E-2885-3 RTD PROBE °F 0 100 200 300 400 RTD Resistance Value 1000Ω 1146Ω 1359Ω 1569Ω 1775Ω K TYPE TEMPERATURE SENSOR AT0E-2885-2 TYPE K THERMOCOUPLE READINGS - THERMOELECTRIC VOLTAGE IN DC MILLIVOLTS F° 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 SP8016-1005 0 0.843 1.068 1.294 1.521 1.749 1.977 2.207 2.436 2.667 2.897 3.128 3.359 3.59 3.82 4.05 4.28 4.509 4.
GAS GRIDDLE ORIFICE Reference CHART FOR altitude and btu content GAS GRIDDLE ORIFICE REFERENCE TABLE FOR ALTITUDE AND BTU CONTENT NOTE: This Table represents the standard upper and lower ranges of BTU per cubic foot content. There is no relationship between the natural gas BTU content and the propane BTU content as shown in each section of this Table. HEAT VALUE BTU/CU FT.
GAS GRIDDLE ORIFICE Reference CHART FOR altitude and btu content HEAT VALUE NATURAL GAS - 1200 24" GRIDDLE MAIN PILOT BURNER BURNER Altitude ft NG LP NG LP 3000 #60 #71 #51 3/64 4000 #61 #71 #51 #57 5000 #63 #72 #52 #57 6000 #63 #72 #52 #57 7000 #64 #72 #53 #57 8000 #65 #72 #54 #58 9000 #65 #72 #54 #59 10000 #66 #72 #54 #59 PROPANE GAS - 2500 36" GRIDDLE MAIN 48" GRIDDLE MAIN BURNER BURNER NG LP NG LP #43 #54 #42 #55 #43 #54 #44 #55 #44 #55 #45 #55 #44 #55 #45 #55 #46 #55 #46 1.25MM #47 #55 #47 1.
SCHEMATICS AT2T-3041-1 STANDARD IGNITION SERIAL NUMBERS 2661 TO 7184 BLK 24V SEC BLK 120V PRI. WHT BLU YEL WHT N.C. OFF N.O . RED SW2 O. T.
SCHEMATICS AT2T-3041-3 INTERMITTENT IGNITION WITH MAIN BURNER VALVE SERIAL NUMBERS 7185 TO 7894 BLK BLK 120V PRI. 24V SEC WHT BLU YEL WHT N.C. OFF N. O. RED P1 2 1 J1 2 YEL VIO RED SW2 O.T.
SCHEMATICS AT2T-3041-2 INTERMITTENT IGNITION SERIAL NUMBERS 7895 & UP BLK BLK 120V PRI. 24V SEC WHT BLU YEL WHT N. C. OFF N.O. RED P1 2 1 J1 2 VIO MAIN GAS CONTROL VALVE RED SW2 O.T.
SP8016-1005 ACCU-STEAM SERVICE MANUAL
