Hussmann DM LOW HEIGHT Series User manual

Part Number:- IM-013 DATE: 29/4/16 REV: A
DM LOW HEIGHT SERIES –FRONT OPEN MULTIDECK
INSTALLATION MANUAL: IM-013
Standard remote versions
The following models are covered by this Manual
DM13
66 Glendenning Road, Glendenning NSW 2761
PO Box 42 Doonside NSW 2767
t: [phone] f: [phone]

PRODUCT INSTALLATION MANUAL DM13 FRONT OPEN MULTIDECK
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Contents
Pre-installation 2
Important Safety Instructions 2
Case services dimensions 3
Operating environment 4
Handling and transporting cases 4
Shipping damages and shortages 4
Installation 5
Positioning and levelling 5
Sealing case joins 8
Joining the cases 9
Attaching trims 11
Attaching kick plates 12
Connecting refrigerant lines 14
Installing the waste drain 15
Connecting power supply 16
Installing sensor probes 17
Mounting fixtures 18
Commissioning 19
Cleaning case 19
Starting up 19
Start-up checks 19
Decommissioning 19
Disposal 19
Operation 20
Loading Merchandise 20
Cleaning and Maintenance 20
Daily Checks 20
Cleaning 21
Important Notes 21
Cleaning Procedure 21
Six Monthly Maintenance 22
Operation Servicing 22
Troubleshooting 23
Controller troubleshooting 24
Appendixes 25
Appendix 1 Wiring diagrams 25
Appendix 2 Produce Engineering Datasheets 25
Appendix 3 Setting table 25
Appendix 4 Attaching case ends 25
Appendix 5 Risk analysis 27
Appendix 6 Electronic Expansion Valve Specification 28
Appendix 7 Controller 28
Appendix 8 Warranty 29

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Pre installation
Important Safety Instructions
Please read the user manual carefully and store for later reference. In this document you will see these symbols with
following meanings
NOTE
Information in this manual is to be followed
in conjunction with specifications, work
practices and regulations of the customer,
installing company and relevant industry.
CAUTION
Care must be taken to avoid damage to
drainage outlets and electrical equipment
mounted under or at the rear of cases.
CAUTION
This symbol indicates electrical safety must
be concerned
WARNING
•Leave enough space to install the system. The space requirement will be instructed in “Pre-installation” section.
•Before installing the system make sure the power source is accessible to the cases array.
•All the power source has to be properly earthed.
•If any potential fail or product disconformity is investigated, please consult a qualified service technician.
•Always disconnect the power of the cases before conducting any service or maintenance.
•Keep the case out of direct sunlight, fire hazardous environment, or high moisture or humidity area.
•Fail to install the system as instructed in this manual may void Hussmann Warranty.
REFRIGERANT WARNING
•Refrigerant is not factory charged.
•Default refrigerant is shown on the product rating plate.
•Other refrigerant types are available upon request
•Ensure that during the transportation and installation the refrigerant circuit is not damaged. Please contact
Hussmann for product maintenance help.
The installation should follow AS1677.2 or other local safety requirements.

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Case Services Dimensions
Fig (1) Service layout standard depth case

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Operating Environment
All Hussmann Cases have been factory tested to AS1731, 25C at 60% RH. For best performance, store temperature
should be maintained at or below 24C at 50% RH, otherwise an “air ventilation kit” may be required to avoid under or rear
cabinet sweating.
To avoid condensation build-up, cases should be positioned to allow air to freely circulate around the underside and rear
of the case. Ideally, the floor will be levelled.
Cases must not be positioned in areas that may be subject to heat or air currents such as ventilation ducts, open doors or
windows, direct sunlight, electric fans or ovens, etc. Otherwise the cabinet may show poor temperature performance or the
operating life is affected.
NOTE
Refer to product MSDS for all hazardous substances used
during installation in relation to their application, PPE, first aid,
disposal and emergency management. Refer page 27 (Risk
Analysis)
For MSDS sheet contact your Hussmann Representative
Handling and Transporting cases
Case dimensions can be found in the product engineering data sheets.
(This manual is a guide only. Always refer to the latest case information available from Hussmann Customer Service)
Always ensure that the moving device is of a suitable type, and has sufficient lifting capacity for the case weight and
dimension. Always lift cases from the underside.
Refer to and follow the manual handling policies of your Company when moving cases.
CAUTION
Care must be taken to avoid damage to drainage
outlets and electrical equipment mounted under or
at the rear of cases.
Shipping Damage and Shortages
If possible, it is recommended that packaging be removed from the cases before they are moved into the store.
After removing packaging, inspect the case for any shipping damage and ensure that all case inclusions, such as trims etc
are accounted for. Immediately report any shipping damage to the carrier and inform Hussmann Customer Service of any
short supplies.

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Installation
NOTE
Information in this manual is to be followed in conjunction
with specifications, work practices and regulations of the
customer, installing company and relevant industry.
Positioning and Levelling
Each case has a unique identification number as follows:
##### - ## - ##
Job no. Line-up no. Case sequence no.
(within line-up)
Example: 106076.42.4 identifies this case in the 4th sequence of the line 42 for the job 106076.
As well as on the packaging, the case identification number appears as a serial number on the rating plate (most commonly
located on the ceiling panel left hand end of the case) refer to Fig (3) and is printed on a decal on the rear of the case ref
Fig (4). The case sequence number is also written on a ticket on the front panel.
Fig (3) Rating Plate
Fig (4) Decal rear of case with case sequence number

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Cases must be positioned so that line-up numbers and case sequence numbers run in succession left to right standing in
front of the cabinet.
CAUTION
Ensure the lifting capacity of the trolley, etc. is
sufficient for the case. Refer to the product
engineering data tables and Risk Analysis (page 27).
To position the cases:
1. If the plinth surface is level, position the case designated as line up number 1 and case sequence number 1 in the
required position.
2. If the plinth surface is not level, determine where the highest point of the plinth is, and position the case allocated
to this position first.
3. Adjust the case height using the adjustable feet (if fitted) or metal shims (do NOT use timber) to ensure the case
is level to within +/- 1.5mm from front to back and side to side and chassis of case is NOT twisted. Maximum
25mm adjustment.
Fig (5) Levelling feet adjustment
NOTE
It is important that all cases are level for correct case joining and operation. If
cases are not properly levelled and positioned, door misalignment will be evident,
resulting in the job needing to be redone at complete cost to the installer.
Hussmann is not liable or responsible for the cost involved in fixing
problems arising directly from the installers’ failure to follow the
requirements outlined in this manual.
DO NOT SET CASE LEVELS OFF THE PATCH END fitted to a case.

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Fig (6) Case Levelling
Fig (7) Case twisting
Make sure case is level:
Front to Back: +/- 1.5mm
Side to Side: +/- 1.5mm
Make sure all adjusting feet, NOT just the
ones at the end of the case, are adjusted
firmly to ensure case does not sag
Make sure Chassis of
case is NOT TWISTED.

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Sealing Case Join
Before joining, all cases must be sealed to protect against water and air leakage.
To seal the joins
1. Remove the shelves and racks from the end bays, if necessary
CAUTION
Electrical cords are connected between Air Delivery
Panels and Shelves on Meat and Deli cases.
Take care if disconnecting leads to remove Shelves
when joining the cases
2. Remove the pan decks.
3. Apply a bead of sealant (approximately 10mm wide) ensure case seal correctly.
Fig (8) Case-end sealing positions
Sealant DO NOT leave any
gaps to ensure cases seal
correctly on edge of frame.

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Joining the Cases
Ensure cases are sealed before joining them to other cases
For instructions on attaching case ends, refer to appendix 4: attaching case ends
CAUTION
Do not walk or sit on cases.
To join the cases
1. Draw up the required case tightly against the case already in position
CAUTION
Case joining bolts should only be used,
with care, at the final pulling-up stage.
2. Ensure that the case is level, from front to back and side to side, with the existing case.
3. Insert the joining bolts, found in the blister pack, into the end holes and tighten –see Fig (9): joining hole locations
Fig (9) Joining holes location
Joining Holes

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4. Seal all internal joints with silicon.
5. Apply either black or white silicon (depending on the interior colour of the case) all the way along the inside join
between the cases, (as supplied)
6. Applying slight pressure, run your finger along the length of the silicon.
7. Replace the square bungs in the air delivery panels and ceiling panels.
Fig (10) Sealing joins
Seal joint between cases with
appropriate coloured silicon between:
- End Frame Bottoms
- Air Delivery Panels

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Attaching Trims
1. Attached joining trims refer figure 11.
2. Ensure that the case is level from front to back and push them together.
3. Place trim to top canopy and align holes to suit.
4. Screw and join trim to canopy.
Fig (11) Case joint trim kit
NOTE: Attach the bumper using a rubber mallet ONLY

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Attaching Kickplates
(This should be done after final Installation of Refrigeration and Drainage connections)
Attach kickplates and, if required, silicon seal to the floor once installation is complete and drains checked for water leaks.
Front Panel
1. Attached front panel and align with front skid rail refer figure 12.
2. Push front panel into bottom and top clips.
3. Check front panel is securely in position.
Fig (12) Attached front panel
Back Panel
1. Attached back panel and align with back skid rail refer figure 13.
2. Push back panel into bottom clip and over top clips.
3. Check back panel is securely in position.
Fig (13) Attached back panel

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Side kickplate
1. Attached side kickplate as per drawing refer figure 14.
2. Adjust slot in kickplate to suit. Make sure kickplate is above floor.
3. Screw kickplate in position.
4. Check kickplate is securely in position.
Fig (14) Attached side kickplate

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Connecting Refrigerant Lines
Connection of refrigeration lines is to be undertaken by qualified persons only.
Refrigeration pipes are located under the pan decks and can be run from case to case through designated access holes in
the end frames and/or out via the bungs at the rear and base of the case. See Fig (1): service layout for location of the
refrigerant up-stand, and Fig (15) for the location of access holes.
Up to four cases can share one refrigeration up-stand, however, to ensure best performance, it is recommended that no
more than three cases share an up-stand.
The evaporator coils have been charged with dry nitrogen in the factory.
Fig (15) Refrigeration access holes
CAUTION
Do not run refrigeration lines from another compressor through
a case. Since pressure in the first system responds to the
coldest location, refrigeration lines from the first system running
through a second system may be chilled to the point that its
pressure control will respond to the pressure from the second
system. This is called cross controlling and should be avoided.
To connect refrigeration lines:
1. Ensure the evaporator coils are fully charged by checking the dry nitrogen holding charge against the pressure
written on the tag attached to the coil.
2. Drill holes through bungs and foam and run pipes as per store requirements.
3. Braze the pipes to the coil using dry nitrogen to prevent any foreign matter being left in the lines. Keep pressure
below 1700kPa (250 Psig).
REFRIGERATION
LINE ACCESS HOLES
FRONT
T
REAR

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CAUTION
Relocate or protect the expansion (TX) valve feeler
bulbs (or power lead if electronic valve) from heat.
Ensure the power lead is clear of heat and flame.
4. Insulate all external pipe work to Standard practice and Customer specifications.
5. Seal off all external access holes with polyurethane foam and then bituminous paint to prevent leakage and
condensation.
6. Connect to condensing unit or compressor.
7. Pressure test all welded and fastened connections to ensure they are free of leaks.
8. Dehydrate the refrigeration system using the triple evacuation method. Use a vacuum pump to 1000 microns for
the first two evacuations and 500 microns on the third, or to the customer’s specific requirements. Break
evacuations 1 and 2 with dry nitrogen, allowing the pressure to rise above atmospheric pressure each time.
9. Charge with refrigerant after final (3rd) evacuation.
Installing a Waste Drain
NOTES
Drains must be connected as per
stipulated local council requirements.
All joins must be solvent welded.
Each case must be connected to its own waste drain See Figure 1: service layout for of the drain up-stand. It is
recommended that 40mm DWV (PVC) piping be used.
To install a waste drain:
1. Fit an elbow and pipe to the existing pipe work.
2. Check that the drain is as per Fig (16).
Fig (16) Drain trap orientation

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CAUTION
Incorrectly installed drain traps will result in
adverse air leaking into the case.
3. Fix remaining pipe work to floor waste drains.
4. Test for leakage by pouring water down the drain and ensure trap is primed before starting refrigeration.
5. NOTE: All joints to be glued with suitable adhesive.
Connecting Power Supply (only for electronically controlled versions)
•The appliance must be installed so the power is accessible.
•To ensure that the appliance is not accidentally switched off, connect unit to its own power source. Do not
connect any other appliance using this source.
•Size the cable according to AS3008 or relevant local standards. For power rating please refer to product
engineering datasheet for details.
Ensure the appliance is properly grounded (earthed).

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Installing Sensor Probes
The DM13 range or cases have the probes pre fitted at the factory. Probe location as per Fig 17
CAUTION
Refer to relevant State or Territory legislation
relating to safe working heights.
Probe location:
1. Air off probe in the ceiling panel.
2. Defrost temp probe in the coil area
3. Suction coil temp probe in the coil area.
Fig (17) Location of probe
CAUTION
Do not walk or sit on cases.
AIR OFF PROBE
DEFROST TEMP PROBE
SUCTION COIL TEMP PROBE

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Mounting fixtures
Replace racks and shelves etc, as necessary to store requirements. Fitting racks and shelves
In manners other than configured as per the product engineering data sheet may compromise
cabinet performance.
NOTE
Incorrect pan and display tag configurations
may compromise case performance.

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Commissioning
Cleaning case
1. Remove the PVC protective coating on stainless steel, where applicable
2. Remove any residue, silicon or tape marks with a cloth moistened with rubbing alcohol
3. Remove all debris from in and around the case
4. Wipe case with a clean, damp cloth, if necessary
Starting up
1. Refer to appendix 1 to 3 for documents may be required during commission.
2. Check supply power is ready and correct voltage. (by Licensed Person).
3. Confirm correct operation of RCD (if fitted) (by Licensed Person).
4. Turn case power on.
5. The controller on board the cabinet in pre-programmed to operate without any adjustment required.
Start-up checks –(by qualified persons only)
1. Ensure that the drain trap is installed the right way up (refer to Fig (16): drain trap orientation in the section installing
the waste drain)
2. Check that all fans and lights (and light RCDs, if installed) are working correctly.
3. Check the anti-sweat circuit, ensuring the thermostat is set correctly (If installed).
4. Set evaporating pressure as per Product Engineering Data –Available from Hussmann.
5. Approximately 24 hours after start-up, check that the case is at correct operating temperature (refer the Product
Engineering Data).
Decommissioning
Plan and risk assess the decommissioning process to include the following:
1. Isolate the case from both the refrigeration and electrical systems.
(Disconnection is to be undertaken by qualified persons only).
2. Removal of the case is to be in the reverse order of installation listed previously.
Disposal
Case disposal is to be carried out by the following:
1. Metal component removed and recycled
2. Remaining by commercial waste management