Duke ReadyFlex RFHU-35M - User Manual

P/N 529904
REV C 05/20/2021
MULTIPRODUCT
MODELS
RFHU-35M
U.S. and Foreign Patents Pending
This manual is Copyright © 2021 Duke Manufacturing Co. All rights reserved.
Reproduction without written permission is prohibited. Duke is a registered
trademark of the Duke Manufacturing Co.
CAUTION:
Please read this manual completely before attempting
to install, operate or service this equipment
Installation and
Operation Manual
WARNING for CA residents: go to www.dukemfg.com/prop65 for prop 65 warning

Summary

Manufacturers Introduction

Important Safety Instructions

Installation

Unpacking Unit

Steps for safely removing the unit from its packaging, checking for damage, and preparing it for installation.

Electrical Connections

Instructions for safely connecting the unit to the power source, emphasizing grounding and proper wiring.

Earthing Instructions

Details on how to properly ground the unit to prevent electrical shock hazards.

Stacking Units

Proper Use of HeatSink Covers

Guidance on selecting and using appropriate HeatSink covers based on product type.

RFHU Operating Instructions - Overview

Overview

Introduction to the RFHU's runtime screen elements and basic operation.

RFHU Operating Instructions - Preheating and Faults

Preheating

Explanation of the preheating process and the visual indicators on the RFHU display.

Faults

Information on common faults that may occur on the RFHU and their corresponding indicators.

RFHU Operating Instructions - Timer Bar

Units with Optional Timer Bar

Detailed explanation of the optional timer bar, its status LEDs, arrow buttons, and pan display.

RFHU Operating Instructions - Menus and Modes

RFHU Daypart Menu

How to cycle through dayparts (Breakfast, Lunch, Dinner) and view associated products.

Menu Mode

Instructions on how to enter and navigate Menu Mode to view different data points for each well.

RFHU Operating Instructions - Settings and Configuration

Settings

Overview of available settings on the RFHU, accessed via the cog icon.

PHU Configurator

Tool to modify recipe mapping for each well within different menus.

Temp Mode

Option to switch temperature display between Fahrenheit and Celsius.

RFHU Operating Instructions - Recipe Editing and Help

RFHU Recipe Editor

How to view, edit, add, or delete recipes, including their hold time, temperatures, and cook more settings.

Help

Reserved for future use for instructional material.

Language

Reserved for future use to change display language.

RFHU Operating Instructions - About and Network

About

Displays unit's serial number, API key, firmware version, and network MAC addresses.

Network

Configuration options for connecting the RFHU to a network via Wi-Fi or Ethernet.

Tools Menu

Access point for Network, Access, Admin, PHU Volume, and Temp Offset settings.

RFHU Operating Instructions - Network Connection

IP Configuration

Details on setting up IP addresses, subnet masks, and gateways for network connectivity.

Select Network Connection

Procedure for selecting a Wi-Fi SSID and entering the password.

RFHU Operating Instructions - DHCP and Static IP

DHCP

Explanation of DHCP toggle for automatic IP assignment versus static IP configuration.

RFHU Operating Instructions - Access and Offset

Access Menu

Allows locking or unlocking configuration options like Recipe Config, Menu, Temp Mode, and Network.

Temp Offset

Function to adjust temperature offsets for individual zones on the RFHU.

Admin

Reserved for future use.

RFHU Operating Instructions - Zone Offset and Volume

Zone 1 Top Offset

Interface for adjusting the temperature offset for the top heater of Zone 1.

PHU Volume

Option to enable or disable audible sound notifications on the RFHU.

RFHU Operating Instructions - DCEP Programming

Duke Connected Equipment Platform (DCEP) Programming

Using the DCEP cloud solution to update RFHU recipes and programming remotely.

Sign In

Instructions for logging into the Duke Connected Equipment Platform.

RFHU Operating Instructions - DCEP Recipe Management

Show Legend

Displays the full recipe list for the account on the DCEP.

Create Recipe

Form for adding new recipes to the DCEP, defining name, temps, and hold times.

USB Programming

Method to program the RFHU using a USB drive when the unit is not connected to the DCEP.

RFHU Operating Instructions - Offline Configuration

Offline RFHU Configurator

Using the configurator to create recipe sets for the RFHU when it's offline.

Download PHU Configuration File

Creating an RCP file from configuration for USB transfer to the RFHU.

Cleaning Guide

Daily Cleaning

Procedure for daily cleaning of stainless steel surfaces, including precautions and recommended supplies.

Recommended Supplies

List of recommended cleaning towels, pads, and chemicals for maintaining the unit.

Cleaning Guide - Procedure and Inspection

Procedure

Step-by-step instructions for cleaning the RFHU unit, including cooling and sanitizing.

Daily Inspection Checklist

List of items to check daily to ensure the unit is clean and in good condition.

Temperature Check Procedure

RFHU Specifications

Electrical Specification;Cord Rating (Top and Bottom Heat)

Electrical ratings, voltage, amperage, and cord connector types for the RFHU.

Dimensions

Physical dimensions of the RFHU, including height, width, and depth, with and without timer bar.

Wire Diagram

Front Display & Timer Bars

Diagram showing wiring for the front display and timer bars.

Top Row

Wiring diagram for the top row of wells, including bottom and top elements.

Middle Row

Wiring diagram for the middle row of wells, including bottom and top elements.

Heat Circuits, Shelf Top & Bottom per Row

Diagram illustrating heat circuits and temperature sensors for each row of wells.

Overview

1. Key Features and Specifications
2. Function Description
3. Connectivity
4. Models and Configurations
5. Important Technical Specifications (RFHU-35M)
6. Usage Features
7. Safety Instructions
8. Maintenance Features

The provided document is an Installation and Operation Manual for the Duke ReadyFlex™ Hot Holding Cabinet, Multiproduct Models, specifically the RFHU-35M.

The ReadyFlex™ Holding Unit (RFHU) is designed to provide unsurpassed culinary performance for holding a broad variety of food products. It features a flexible, easy-to-use, and adaptable format to meet the needs of restaurant operations and profitability. The unit incorporates Duke's patented HeatSinks™ technology for both top and bottom heat zones, which are programmable to achieve extended hold times with improved food quality and consistency. This innovative design allows for new menu items without limitations on holding, and enables changes to recipes and hold configurations by daypart, from breakfast to lunch to dinner.

Key Features and Specifications:

Function Description:

The RFHU is a hot holding cabinet designed to maintain food products at optimal serving temperatures for extended periods. It utilizes independent top and bottom heat zones, which are programmable to dial in perfect recipes for various food items. The multi-pan capable design allows for holding 2.5" and 4" deep pans in 1/3, 1/2, and full-size configurations, as well as 13x18" sheet pans. This multi-pan feature is configurable and programmed without the need for additional parts or tools. The unit features an easy-to-use, touchscreen user interface that is visual, smart, intuitive, and colorful, allowing for in-store control and programming, including changing to stored library recipes or programming new ones on the fly. Daypart switching is simple and pre-programmed.

Connectivity:

The ReadyFlex™ Technology includes built-in Wi-Fi, Ethernet, USB, and Mesh networking, as well as connectivity to Bluetooth-enabled devices. This allows the RFHU to interact with third-party cloud and on-premise solutions.

Models and Configurations:

The manual specifically details the RFHU-35M model.

• RFHU-35M: This model has a layout consisting of 3 rows by 4 columns, accommodating up to 12 programmed recipes in total.
• Optional HeatSink Configuration: The RFHU is also available with a bottom-only Duke technology HeatSink option, offering improved holding times and food quality at a more compelling price compared to traditional FWM PHU models.
• Dedicated Lid System: A dedicated lid system is available for operations that prefer fixed pan sizes.

Important Technical Specifications (RFHU-35M):

• Dimensions:
  • Height: 19.3 inches (49.0 cm)
  • Width: 40.0 inches (101.6 cm)
  • Depth (body only): 14.1 inches (35.8 cm)
  • Depth (with Timer Bar): 17.3 inches (43.9 cm)
• Pan Configuration:
  • Row 1: (2) 1/2 size pans & (2) 1/3 size pans (2.5" deep)
  • Rows 2 & 3: (2) 1/2 size pans & (2) 1/3 size pans (4" deep)
• Electrical Specification/Cord Rating (Top and Bottom Heat):
  • 208/240 V - 60Hz:
    • Amps: 17.3/20.0
    • NEMA Plug: L6-30P
  • 220/240V - 50/60Hz:
    • Amps: 18.3/20.0
    • IEC: 60309
• Temperature Range: Allowable well temperatures can be programmed from 140°F-280°F (60°C-137.8°C).
• Hold Time: Configurable from 1 minute to 540 minutes.

Usage Features:

• Touchscreen Interface: Visual, smart, intuitive, and colorful for easy operation.
• Daypart Menus: Three-day part menus (Breakfast, Lunch, Dinner) are available, allowing for different recipe displays and holding configurations based on the time of day.
• Recipe Programming: Users can program new recipes on the fly or select from stored library recipes. Each recipe includes settings for Hold Time, Cook More Time, Top Temperature, and Bottom Temperature.
• Cook More Time Indicator: A "+" symbol appears on a well to indicate that the remaining hold time is low, prompting staff to start cooking/preparing the recipe again.
• Timer Functionality: Pressing a well starts its timer. Wells change color to indicate status: green (use first), amber (use next), red with "X" (expired).
• Temperature Mode Selection: The temperature display can be switched between Fahrenheit and Celsius.
• Temperature Offset: Allows adjustment of temperature offset per zone to ensure accurate holding temperatures.
• PHU Volume: Enables or disables sound on the RFHU.
• Stacking Capabilities: The RFHU is designed for limited stacking (up to 2 units per stack) to optimize space.
• HeatSink™ Covers: Specific covers (Solid Lid, Vented Lid, No Lid) are recommended based on product type (Broiled and Grilled, Fried) and lid option (Dedicated 1/3 Size Lid, Multi-pan Flexible Lid).
• DCEP Programming: The Duke Connected Equipment Platform (DCEP) allows for cloud-based recipe and well programming updates using the unit's serial number and API key.
• USB Programming: Recipes and programming settings can be updated via a USB flash drive for units not connected to the DCEP.

Safety Instructions:

• Grounding: The unit must be properly grounded to reduce the risk of electric shock. Do not modify or defeat electrical connections or alter the plug.
• Electrical Verification: Before connecting to power, verify that the voltage and phase of the power source match the unit's data label.
• Clearances: Maintain minimum clearances around the unit for proper airflow (2" on right and left sides, OPEN at rear, 0" at floor).
• Hot Surfaces: Be aware that the bottom and sides of warmer wells are very hot and cool slowly.
• Chemicals: Do not use corrosive chemicals on the equipment.
• Service: Equipment should only be serviced by qualified personnel.

Maintenance Features:

• Cleaning Guide:
  • Daily Cleaning: Turn off, unplug, and allow to cool for 30 minutes. Remove holding pans and heat sink covers for washing, rinsing, and sanitizing. Clean upper and lower heat sink surfaces with soapy solution or KAY™ Degreaser using a cleaning towel or non-scratch scrub pad. Wipe all compartments with a sanitizer-soaked towel (damp, not dripping).
  • Stainless Steel Care: Use soft cloths or plastic scouring pads. Use alkaline-based or non-chloride cleaners. Rinse repeatedly and dry thoroughly. Avoid acid-based cleaning solutions and abrasive cleaners.
  • Inspection Checklist: Ensure the unit is free of visible food soils, grease, smudges, and that holding pans are clean and undamaged.
• Temperature Check Procedure:
  • Use a calibrated digital temperature meter with a surface temperature probe.
  • Perform checks with empty, pre-heated wells (30 minutes).
  • Take readings from the bottom and top heat sinks, positioning the probe halfway back beneath the rail.
  • The average temperature should be no greater than ± 10°F (± 6°C) from the set point.
  • Adjust temperature offset via the Tools menu if necessary.

Duke ReadyFlex RFHU-35M Specifications