VMC-H3

Overview

The Alto-Shaam VMC-H3 is a countertop Vector H Series multi-cook oven configured for three half-size sheet pans. Its three independent oven chambers let operators cook different menu items at the same time, setting temperature, fan speed and cook time separately for each chamber. Alto-Shaam’s Structured Air Technology directs heat for faster, more even cooking, and the manufacturer describes the H Series as ventless and waterless.

The VMC-H3 is part of the Vector H Series family, which includes two-, three- and four-shelf models, as well as related hotel-pan versions. The H3 model covered here has three shelves and is specified for half-size sheet pans; it should not be confused with the H3H hotel-pan model.

Key Features

• Three separate cooking chambers: Set the temperature, fan speed and cook time independently in each chamber to prepare a variety of menu items simultaneously.
• Half-size sheet-pan capacity: Accommodates three 18" x 13" x 1" half-size sheet pans, or three GN 2/3 pans measuring 354 x 325 x 25 mm.
• Structured Air Technology: Focused heat supports faster, more even cooking and consistent results. Alto-Shaam says this can reduce the need to watch and rotate pans.
• Ventless, waterless operation: The product literature describes the Vector H Series as operating without a vent or water connection.
• Programmable recipes: The advanced control has a user-friendly interface and programmable recipes to support repeatable cooking.
• Optional remote management: The product literature identifies ChefLinc as a cloud-based remote oven management option.
• Countertop footprint: The manufacturer lists a 21-1/2-inch exterior width.

Specifications

• Brand: Alto-Shaam
• Model: VMC-H3
• Series/type: Vector H Series multi-cook oven
• Configuration: Three shelves and three half-size sheet pans
• Pan capacity: Three 18" x 13" x 1" half-size sheet pans; alternatively, three GN 2/3 pans measuring 354 x 325 x 25 mm
• Exterior dimensions (H x W x D): 36-5/8" x 21-1/2" x 37-1/2" (929 x 546 x 953 mm)
• Interior dimensions (H x W x D): 21-3/8" x 14-11/16" x 19" (544 x 373 x 483 mm)
• Net weight: 272 lb (123 kg)
• Maximum temperature: 525°F (274°C)
• Electrical, 208–240 V, single phase, 60 Hz: At 208 V, 38 A, 7.9 kW, 50 A breaker; at 240 V, 43 A, 10.3 kW, 50 A breaker. The spec sheet lists NEMA 6-50.
• Electrical, 208–240 V, three phase, 60 Hz: At 208 V, 22 A, 7.9 kW, 30 A breaker; at 240 V, 25 A, 10.3 kW, 30 A breaker. The spec sheet lists NEMA 15-30P.
• Canadian connection note: The spec sheet states that there is no cord or plug in Canada.
• Clearances listed in the spec sheet: Top 2", left 2", right 2", front 20", back 2". The sheet also recommends 18" for service access.
• Heat gain: 1,898 BTU/hr (0.56 kW).
• Certifications shown in the product listing: ULC and NSF.
• Country of manufacture shown in the product listing: USA.

Electrical specifications vary with the supply configuration. Confirm the required connection for the unit being installed and follow applicable electrical codes. The manufacturer’s spec sheet notes that specifications may change without notice.

Installation & Requirements

The operator’s manual says to place the oven on a surface rated to support its weight, position it within five feet of the appropriate electrical outlet, and level it front to back and side to side. The VMC-H3 must be installed level and is not intended for built-in installation. The manual warns that it is for use only on noncombustible surfaces and says to maintain the correct clearances to combustible materials. The product spec sheet lists the clearances for the VMC-H3 as 2" at the top, left, right and back, and 20" at the front; it separately recommends 18" for service access.

Choose an installation location that is not affected by steam, grease, dripping water, high temperatures or other severely adverse conditions. The manual instructs users to connect the appliance to a properly grounded outlet, avoid extension cords, and keep the cord away from hot surfaces. It also says not to operate the appliance with a damaged cord or plug, or to attempt to service the appliance or its cord and plug. The manual’s electrical warning specifies copper supply conductors suitable for temperatures of at least 90°C, use on individual branch circuits, and not connecting to a circuit operating at more than 150 VAC to ground. Electrical connections must meet applicable codes.

The spec sheet lists single-phase and three-phase electrical configurations for the VMC-H3. For Canadian installations, it notes that the oven is supplied without a cord or plug. The product literature describes Vector H Series operation as ventless and waterless; it does not specify a water connection for this model.

Operation

Use the separate chambers to prepare different foods at the same time, adjusting temperature, fan speed and cook time for each chamber. The programmable recipe control is intended to help operators repeat cooking settings consistently. The manual’s usage precautions say to use the appliance only for heating or cooking, keep liquids and foods that may become liquid level and at or below eye level where visible, and use dry oven mitts or other protective clothing when loading and unloading.

Do not block the oven openings or cover racks or other oven parts with metal foil. The manual also says not to use the appliance near water or in a wet location. After cooking, do not unplug or disconnect the oven immediately; its cooling fans must continue running to protect electrical components.

Cleaning & Maintenance

Before cleaning, shut down the oven using the control. The blowers run during the cool-down process; wait for them to stop and for the display to turn off before cleaning. The manual says the chamber must be at or below 140°F (60°C) and the oven must be off. Wear eye and hand protection, and allow the oven, racks and jet plates to cool. Do not spray cleaner into the oven while the blowers are running.

Daily

• Remove spills with disposable paper wipes or a damp cloth.
• Wipe the exterior with a damp cloth, then with stainless steel cleaner.
• Check the screen for cracking or peeling; contact Technical Service if needed.

Weekly

• Restart the oven to reboot the screen.
• Clean the entire oven with a non-abrasive nylon scrub pad.
• Inspect and clean grease filters, if equipped.
• Do not spray cleaner directly into the fan openings at the rear of the oven.

Monthly

• Inspect and clean the cooling-fan filters.
• If the oven is dirty or requires the monthly cleaning procedure, shut it down and let the blowers complete the cool-down. Remove the cooking racks and jet plates; handle the jet plates with hand protection. Separate the jet plates before cleaning them.

Yearly

The manual says yearly maintenance must be performed by a qualified professional. Remove the convection elements and inspect the return-air path for grease buildup, removing any buildup found. Inspect the catalyst for degradation, the heater and motor flange areas for grease leakage, the door gaskets for correct shape and seal, and the inner and outer door window panes for cracks or chips. Check and tighten wire connections, display, interface and control-board connections, and door hinges. Record software versions and update if necessary; record the individual element amp draws and incoming supply voltage; and test each chamber fan, heater and light.

Use the cleaning procedures in the manual: improper cleaning can damage the catalyst and void the warranty. Do not spray water or cleaning solution on the catalyst or into oven openings, and do not use steel pads, wire brushes or scrapers.

Troubleshooting

The operator’s manual lists these relevant diagnostic messages and checks. For service beyond the listed checks, the manual says to contact an authorized Alto-Shaam service partner.

• E-11, sensor open: The listed condition is a cavity-air sensor reading above 650°F (343°C). The manual identifies the sensor connection, sensor and control board as possible areas to check.
• E-30, unit under temperature: The cavity temperature remains 25°F (14°C) below the target for more than 90 minutes. The manual directs troubleshooting of the heating element.
• E-31, electronics over temperature: The control-board temperature exceeds 158°F (70°C) and/or the interface-board temperature exceeds 184°F (84°C). Listed checks include blocked or dirty cooling-fan filters, a cooling fan that is not operating, and unmet installation-clearance requirements.
• E-94, interface-board/control-board communication error: No signal transfer occurs between the boards for more than five seconds. The listed checks are the Modbus cable connection, the cable, the control board and the interface board.
• E-108, bi-metal thermostat open: An open circuit is detected across the bi-metal switch. Listed checks include dirty or blocked cooling-fan filters, a non-operating cooling fan, the switch connection, installation clearances and the bi-metal switch.
• E-109, high-limit error: The manual identifies an open circuit across the high-limit switch and notes that an improperly installed jet plate or a non-operating cavity fan may be relevant checks in the listed troubleshooting sequence.

Applications

The three-chamber layout suits foodservice operations that need to cook several menu items at once while using a compact countertop oven. Separate chamber settings can accommodate different cooking programs during service, such as preparing distinct menu components concurrently. The three half-size pan positions make the VMC-H3 a fit for kitchens already working with half-size sheet pans or GN 2/3 pans. Its ventless, waterless operation is identified in the manufacturer’s Vector H Series product literature.