The regulator is preset at the factory for 6" W.C. (Water Column) for Natural Gas; 10" W.C. for Propane. No further adjustment should be required. Use the 1/8" pipe tap on the burner manifold for checking pressure. Make sure the gas piping is clean and free of obstructions, dirt, and piping compound. An adequate gas supply is necessary. Undersized or low pressure lines will restrict the volume of gas required for satisfactory performance. The recommended maximum supply pressure (upstream of the

3. Loosen the air shutter adjustment screw. 4. Turn the burner on . If the flame is soft, lazy or yellow, there is not enough primary air and the air shutter needs to be opened up. If the flame is lifting off the burner, there is too much primary air and the air shutter needs to be closed down. 5. Rotate the air shutter so that a blue flame without any yellow tipping is seen across the burner. 6. Once the proper adjustment is made, carefully tighten the adjustment screw without moving the air ad

If the gas supply piping is to be tested at a pressure equal to or less than 1/2 psi (3.45 kPa), the individual shutoff valve must be closed during testing. REGULATOR ADJUSTMENT 3. Light all burners and take a reading. (ALL MODELS) 4. Light all the gas appliances on the same supply line and take a reading. WARNING: SHUT OFF THE GAS BEFORE SERVICING. A. At no time should the pressure drop more than 1/2” W.C. A large pressure drop Accurate gas pressure adjustment can only be made could be an indic

11 SERVICE AND PARTS INFORMATION ............................................................................... 11 GRIDDLE PLATE INSTALLATION ...........................................................................................6 — 4 — GENERAL Gas fired broilers are designed for commercial use only and feature fast, efficient gas heat. Each burner is controlled by an adjustable on/off gas valve. Model Number BTU/hr Input of Burners Rating 3 VST4B @ 45,000 ea. 135,000 UNPACKING Immediately

1. Remove the grid carriage assembly as outlined in Grid Carriage Assembly. 2. Remove two screws and the lower lever cover from the broiler. – 25 – 3. Remove the two cotter pins and washers from the lower lever arm assembly. 4. Remove the lower lever arm assembly from the two brackets. 5. Reverse the procedure to install. BLOWER AND MOTOR GHIR44 WARNING: SHUT OFF THE GAS BEFORE SERVICING. WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. 1. Open the

DO NOT USE AN OPEN FLAME. 1. Remove the manifold cover assembly as outlined in Covers, Panels and Handles. 2.Disconnect the burner tubing from the burner valve. 3.Disconnect the burner valve from the sub- manifold. 4.Remove the burner valve from the broiler. 5.Reverse the procedure to install. Regulator (GHIR44) WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. WARNING: SHUT OFF THE GAS BEFORE SERVICING. WARNING: ALL GAS JOINTS DISTURBED DURING SERVI

2. Remove the lower front panel as outlined in Covers, Panels and Handles. 3.Disconnect the pilot valve tubing from the pilot outage protection valve. 4.Remove the oven bottom assembly as outlined in Covers, Panels and Handles. 5. Loosen the b-nut and remove the ignitor wire from the bracket. – 20 – 6. Remove the two bolts from the pilot outage protection valve and the bracket. 7. Disconnect the pilot outage protection valve from the union and the thermostat. 8. Remove the pilot outage protectio

NOTE: For proper alignment of the gas tubing, make sure you do not change the position of the stop nuts. 7.Remove the two nuts and two washers from the threaded rod. 8.Hold the burner manifold assembly and remove the two bolts, manifold holding bracket and two washers from the broiler. 9.Reverse the procedure to install. 2. Disconnect the burner tubing from the burner valves. 3. Disconnect the pilot supply tubing from the pilot valve. 4. Remove the two burner valves from the burner manifold asse

DO NOT USE AN OPEN FLAME. NOTE: These procedures apply to the left and right side burner subassemblies. 1. Remove the burner box cover as outlined in Covers, Panels and Handles. 2. Remove the burner assemblies as outlined in Burner Assemblies. 3. Remove the elbow pilot nozzles as outlined in Pilot & Elbow Nozzle. 4. Disconnect the burner tubing fitting from the burner sub-manifold. – 15 – 5. Loosen the two nuts on the burner sub- manifold. 6. Remove the burner sub-manifold from the broiler. 7. R

5. Reverse the procedure to install. GHIR44 WARNING: SHUT OFF THE GAS BEFORE SERVICING. 1. Allow the burner assembly to cool. 2. Lift the rear of the burner assembly off the alignment pins. 3. Carefully move the burner assembly to the rear of the broiler and then remove burner from the broiler. CAUTION: Make sure that you do not damage the pilot burner nozzle when you remove the burner assembly. 4. Reverse the procedure to install. – 13 – HEAT SHIELD (GHIR44) WARNING: SHUT OFF THE GAS BEFORE SER