Hussmann microSC SHM-A Series Installation & Operation Manual

Hussmann microSC SHM-A Series Installation & Operation Manual

Medium temperature self contained horizontal merchandiser with r-290 refrigerant

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Æ
SHM-A
Medium Temperature Self Contained
Horizontal Merchandiser
WARNINGS:
with R-290 Refrigerant
If the information in these instructions are not followed
exactly, a fire or explosion may result, causing property
damage, personal injury or death.
Installation and service must be performed by a qualified
installer or service agency.
READ THE ENTIRE MANUAL BEFORE
INSTALLING OR USING THIS EQUIPMENT.
The unit uses R-290 gas as the refrigerant. R-290 is
flammable and heavier than air. It collects first in low
areas but can be circulated by the fans. If propane gas
is present or even suspected, do not allow untrained
personnel to attempt to find the cause. The propane
gas used in the unit has no odor. The lack of smell does
not indicate a lack of escaped gas. If a leak is detected,
immediately evacuate all persons from the store, and
contact the local fire department to advise them that
Installation &
a propane leak has occurred. Do not let any persons
back into the store until the qualified service technician
Operation Manual
has arrived and that technician advises that it is safe to
return to the store. No open flames, cigarettes or other
possible sources of ignition should be used inside or in
the vicinity of the units.
FAILURE TO ABIDE BY THIS WARNING COULD
RESULT IN AN EXPLOSION, DEATH, INJURY AND
PROPERTY DAMAGE.
P/N 3104942_B
February 2020
IMPORTANT
Keep in store for future reference!
Spanish 3104949
MANUAL- I/O SHM-A

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  • Page 1 Æ SHM-A Medium Temperature Self Contained Horizontal Merchandiser WARNINGS: with R-290 Refrigerant If the information in these instructions are not followed exactly, a fire or explosion may result, causing property damage, personal injury or death. Installation and service must be performed by a qualified installer or service agency.
  • Page 2 • Component parts are designed for propane and non-incendive and non-sparking. Component parts shall only be replaced with identical repair parts. FAILURE TO ABIDE BY THIS WARNING COULD RESULT IN AN EXPLOSION, DEATH, INJURY AND PROPERTY DAMAGE. P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 1 800-890-2900 • www.hussmann.com...
  • Page 3: Table Of Contents

    LED ....... . . 3-5 Hussmann Product Control ....1-1 KDE PLUS Buttons .
  • Page 4: Ansi Z535.5 Definitions

    Case ventilation openings must be clear of any obstructions. Do not damage the refrigerant Do not use electrical appliances inside the food circuit. storage compartments of the case. P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 1 800-890-2900 • www.hussmann.com...
  • Page 5: Installation

    All equipment should be thoroughly examined open doors or windows, etc. to create air cur- for shipping damage before and during rents around the merchandiser. unloading. This equipment has been carefully SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 6: Self Contained Location

    It is your responsibility to provide accurate Proposition 65 warning labels to your customers when necessary. For more information on Proposition 65, please visit the California State government website. SHM3-A & SHM4-A P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 7: Model Description

    Do NOT remove shipping crate until the inside of merchandiser merchandiser is positioned for installation. Do NOT stand or walk on top of merchandiser. Do not store items or flammable materials atop the unit. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 8: Merchandiser Leveling

    Serial Plate maintenance of the condensing unit. NOTE: Do not allow trim to cover any intake or discharge grilles located in the lower front panel. P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 9: Self-Contained Refrigeration Equipment Start Up Check List

    LEGAL DISCLAIMER: Hussmann shall not be liable for any repair or replacements made without the written consent of Hussmann, or when the product is installed or operated in a manner contrary to the printed instructions covering installation and service which accompanied such product.
  • Page 10 INSTALLATION NOTES: P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 11: Electrical / Refrigeration

    • Plug into an outlet designed for the plug. • Do not overload the circuit • Do not use long or thin extension cords. Never use adapters. • If in doubt, call an electrician. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 12: Refrigeration System Views

    STARTUP / OPERATION REFRIGERATION SYSTEM (Views below show slide out refrigeration system) Detail A Pull out the condensing unit where the label indicates. P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 13: Before Beginning A Service Or Repair

    Do not let any persons back into the store cleared from the area and from the refrigeration until the qualified service technician has arrived systems. and that technician advises that it is safe to return to the store. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 14: Replacing Refrigeration System Components

    P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 15 Remove all service ports. If a Schrader valve is used on the compressor service tube, it must be removed and the previous steps followed in order to braze the service tube shut. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 16 STARTUP / OPERATION NOTES: P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 17: Start Up / Operation

    The Differential is the non-adjustable pre • Presence of an open collector output programmed temperature. c. The Control is designed to read and display a cabinet temperature not a product temperature. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 18: Further Information

    Dimensions: TTL for Unicard / Device Manager connection (via DMI) MECHANICAL CHARACTERISTICS Terminals: Connectors: Dimensions: TTL for Unicard / Device Manager connection (via DMI) Humidity: Terminals: Connectors: P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com Humidity:...
  • Page 19: Connections

    Open Collector Output (OC). Not Used TTL Unicard/DMI/Multi Function Key connection OUT4 Shared Terminal 34-35-36 RS485. Connection 1 - Supervision Gateway. N.O. OUT4 37-38-39 RS485. Connection 2 - Supervision Gateway. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. RTN400 Page 8/130...
  • Page 20: Led

    When the instrument is powered on it performs a lamp test, during which time the display and LEDs will flash for several seconds to check that they all function correctly. P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com RTN400 Page 16/130...
  • Page 21: Kdeplus Buttons

    When pressed during (if active) Opens the Programming Menu start-up it enables • Opens Machine Status menu (User and Installer parameters) the user to select the • Confirms commands application to be loaded. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 22: Sensor To Control Configuration

    RTN400 controller. KEYB 15 cm. MAX. OUT2 OUT3 OUT1 OUT4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Defrost Sensor P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 23 20°F. (Set-Point) 21°F + 20°F (Differential) = Defrosts are time initiated and temperature 41°F. The compressor will cycle off 21°F and terminated. The defrost setting is factory set as back on at 41°F. shown above. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 24: Start Up

    Air grille STOCKING Product should NOT be placed inside the merchandisers until merchandisers are at proper operating temperature. Allow merchandiser 24 hours to operate before loading product. P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 25: Maintenance

    Solvent, oil or acidic based cleaners on any cause merchandisers to perform poorly. interior surfaces. Do not use high pressure The honeycombs may be cleaned with a water hoses. vacuum cleaner. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 26: Cleaning Stainless Steel Surfaces

    Grasp the step pan ment. A dirty condenser blocks normal airflow with both hands to remove. Always wear through the coils. gloves when removing step pan. P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 27: Cleaning Evaporation Pan

    The evaporation pan waste water will overflow and spill onto the floor if the heater is not properly operating. SHUT FANS OFF DURING CLEANING PROCESS. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 28 Verify unit doors and lids work and are sealed correctly. Verify that all the panels, shields and covers are in place. Technician Notes: Form HSCW03 Rev-29 OCTOBER13 0525210_C P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 29: Service

    7. Release motor screws to get to motor / blade assembly (Fig. D). 8. Change the failed part. 9. If the only damaged part is the motor, remove blade. 10. Reverse the process and make sure everything is in place. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 30: Replacing Evaporation Fan Motors

    12. Reverse the process and make sure everything is in place. Product will be degraded and may spoil if allowed to sit in a non-refrigerated area. P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com...
  • Page 31: Replacing Food Compartment Fan Motors

    4. Disconnect evaporator fan motor harness everything is in place. for each motor. 5. Remove screws (2 on each side - total of 4) to remove evaporation fan bracket from the cabinet Fig. A. SHM-A Merchandisers HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
  • Page 32 To obtain warranty information or other support, contact your Hussmann representative. Please include the model and serial number of the product. Hussmann Corporation, Corporate Headquarters: Bridgeton, Missouri, U.S.A. 63044-2483 01 October 2012...

This manual is also suitable for:

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