GT-30 & GT-40 Installation & Operations Manual J-Version Master-Bilt Products 908 Highway 15 North New Albany, MS 38652 Phone: (800) 684-8988 PN 029-90000 Rev 03/12/07 LN
TABLE OF CONTENTS INTRODUCTION..................................................................................................................................................4 STORE CONDITIONS .........................................................................................................................................4 WARNING LABELS AND SAFETY INSTRUCTIONS........................................................................................5 PRE-INSTALLATION INSTRUCTIONS ....................
INTRODUCTION Thank you for purchasing a Master-Bilt cabinet. This manual contains important instructions for installing, using and servicing a Master-Bilt GT case. A parts list is included in with this manual. Read all these documents carefully before installing or servicing your equipment. STORE CONDITIONS The Master-Bilt GT cases are designed to operate in the controlled environment of an air-conditioned store. The store temperature should be at or below 75°F and a relative humidity of 55% or less.
WARNING LABELS AND SAFETY INSTRUCTIONS This symbol is the safety-alert symbol. When you see this symbol on your cabinet or in this manual, be alert to the potential for personal injury or damage to your equipment. Be sure you understand all safety messages and always follow recommended precautions and safe operating practices. NOTICE TO EMPLOYERS You must make sure that everyone who installs, uses or services your cabinet is thoroughly familiar with all safety information and procedures.
PRE-INSTALLATION INSTRUCTIONS INSPECTION FOR SHIPPING DAMAGE You are responsible for filing all freight claims with the delivering truck line. Inspect all cartons and crates for damage as soon as they arrive. If damage is noted to shipping crates or cartons or if a shortage is found, note this on the bill of lading (all copies) prior to signing.
MECHANICAL Leveling Cabinet Level the cabinet so as to insure proper drainage of the drain pan and proper operation of the lids and refrigeration system. The GT cabinet condenser has cooling air entering and discharging through the front grille. This allows the cabinet to be placed against a wall or solid object without blocking the flow of condenser air. To comply with Sanitation requirements, the cabinet must be mounted on legs (6” high minimum) or the base must be sealed to the floor using N.S.F.
DEFROST AND TEMPERATURE CONTROL SETTINGS The GT cabinet has a temperature control that is adjustable from #1 (warmest setting) to #9 (coldest setting). Turn the control knob in line with the punch mark to the desired setting. The temperature control is located near the condensing unit at the bottom of the cabinet. Punch Mark The unit defrost is controlled by a timer in the control box. After removing the condenser grille, the control box will slide out until the defrost timer is visible.
AUTOMATIC EXPANSION VALUE GT SERIES CABINETS After the cabinet has been in operation for a short time the high pressure or discharge pressure of the o refrigeration system should be 250 pisg to 270 pisg in a 75 F ambient room. The suction pressure at the compressor should be approximately 7 to 9 pisg *** . The cabinet does not have to be at operation temperatures for the pressures to stabilize. The automatic expansion valves are basically preset and should not need any adjustment for proper operation.
EXTERIOR PARTS NOMENCLATURE C B A D G H E I F J A. B. C. D. E. F. K TOP DECK CENTER TRACK TRIM MOLDING GLASS RAIL GLASS LID FRONT GLASS L G. H. I. J. K. L. VERTICAL TRIM FRONT PANEL LOWER BUMPER UPPER BUMPER ACCESS PANEL UNIT GRILLE Glass Lid and Top Deck Removal To remove the glass lid, start in the closed position and lift up on the front extrusion. Pull the glass lid towards you to remove it from the track. Reverse procedure to reinstall.
Drain Pan and Light Shield Removal Light Shield To remove the drain pan, remove screws along the front face of the drain pan. Lift the rear of the pan up and out of the drain trough. Slide pan towards you and out. Reverse procedure to install. To remove the light shield, remove screws along the front face of the light shield. Pull the light shield towards you and out. Reverse procedure to reinstall.
TROUBLE SHOOTING GUIDE 1. High head pressure and high back pressure: A. B. C. D. 2. Low back pressure and low head pressure: A. B. C. 3. Expansion valve restriction. Refrigerant undercharged. Leak in system. Pressures normal – cabinet warm: A. B. 4. Condenser coil clogged or restricted. Condenser fan motor defective. Air in the system. Refrigeration overcharge. Refrigerant undercharged. Control set too warm. Compressor starts and runs – but cycles on overload: A. B. C. Low voltage.
10. Special service situations. If moisture or liquid is observed around or under a Master-Bilt cabinet, an immediate investigation should be made by qualified personnel to determine the source of moisture or liquid. The investigation made should determine if the cabinet is malfunctioning or if there is a simple housekeeping problem. Moisture or liquid around or under a cabinet is a potential slip/fall hazard for persons walking by or working in the general area of the cabinet.
ACCESSORIES Description Casters 3” Dia. Load Level Shelves Lid Locking Kits-Less Locks Novelty Baskets (White Epoxy-Coated) 9.125” X 12” X 7.125” Sack Rack 48” X 17.5” X 3” Superstructures GT-30 A029-11140 (4) A027-18027 A027-11129 33-01405 GT-40 A029-11140 (4) A029-18027 A029-11129 33-01405 A027-20200 A029-20200 SALE AND DISPOSAL OWNER RESPONSIBILITY If you sell or give away your Master-Bilt cabinet you must make sure that all safety labels and the Installation Service Manual are included with it.
