Plant Growth Cabinets

Transcription

1 Plant Growth Cabinets MODELS INCLUDE: TPG-2400-TH-Co2 TPG-2900-TH-Co2 Thermoline Scientific Equipment Pty. Ltd. T/A Thermoline Scientific ABN Tarlington Place, Smithfield. N.S.W Australia. P.O. Box 6862, Wetherill Park Delivery Centre, N.S.W Australia. Phone: (02) International: Fax: (02) International: sales@thermoline.com.au Web:

2 Operators Instructions for Thermoline Plant Growth Cabinet Model Number TPG-2400-TH-Co2 & TPG-2900-TH-Co2. Please read this manual to familiarise yourself with the functions before operating the Plant Growth cabinet Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Location Connection of Supplies Refrigeration & Installation of Remote Air Cooled Condenser. Connection of Supplies Check Fan Rotation. Electrical Water Supply Condensate Drain Overflow Light Loft Ventilation Thermoline High Light Intensity Plant Growth Cabinet Theory of Operation Main growth Area Conditioning Area Theory of Operation Conditioning Area Light Loft Area Controls Enclosure Sensor Housing Operators Control Panel General Controllers & Timers Operators Control Panel Function Switches Lighting Timers Alarm Indicators 2

3 Page 10 Page 11 Page 12 Page 13 Page 15 Page 17 Page 18 Page 22 Operators Control Panel Alarm Indicators Safety Controls and Interlocks High Temperature Safety Thermostat Low Temperature Safety Thermostat Element safety Thermostat Light Loft Safety Thermostat Safety Controls and Interlocks Humidifier Safety Thermostat Water Level Interlock Electrical Circuit Breakers Refrigeration High and Low Pressure Safety Crankcase Pressure Regulator Head Pressure Control Compressor Liquid Injection Operation of Diurnal Control Diurnal Temperature & Humidity Control Diurnal Lighting Control General Operation Operation of Diurnal Control General Operation continued. Adjusting the Calibration Offset Regular Checks and Maintenance Operating Guidelines for the Adjustable Shelf/Floor Electrical Schematic. Refrigeration Schematic. Lighting Layout. 3

4 Operating Instructions for Thermoline Plant Growth Cabinet Model Number TPG-2400-TH Co2 & TPG-2900-TH-Co2. Location. Locate the cabinet on a firm level surface, in a well-ventilated area. The base of the cabinet is fitted with castors to allow ease of movement, and once in position it can be fixed and levelled, using the lock-down feet provided adjacent to the castors on the base frame. To adjust the level, use a spanner to undo the screws until the head of the screws raise the cabinet off the ground. It is important that the cabinet is levelled reasonably accurately, in order for water to drain out of the drain tube at the rear of the cabinet. (Use a spirit level if necessary). Connection of Services. All services should enter the cabinet through the roof. All penetrations have been made in the sheet metal and are labelled accordingly. Refrigeration & Installation of Remote Air Cooled Condenser. The refrigeration compressor and receiver are located in the control enclosure. Hot gas and liquid connection are fitted with shut off valves that are located in this enclosure. The termination points are at the roof of the cabinet and are labelled accordingly. An air-cooled condenser is supplied with the chamber, which has to be located in a suitable position, preferably outside the building. Please remember that the condenser location should be selected taking into account: Solar radiation. The potential for the build up of debris, such as leaves, paper etc. Ease of access for cleaning. A Qualified Technician should perform installation of the Remote Air Cooled Condenser. Failure to do this may result in premature failure of the refrigeration system. Installation of the Remote Air Cooled Condenser consists of: 1. Making connections for the hot gas and liquid lines between the cabinet and the external condenser. Use ½ inch copper pipe for both hot gas and liquid. Do not open Ball Valves. 2. Pressure test for leaks. Then evacuate the refrigerant lines. (Use Schrader connectors). 3. Then charge the lines with R134a refrigerant. Use a Liquid charge. 4. Open all four ball valves. 5. Making electrical connections between the electrical terminations in the controls enclosure and the key isolating switch on the Remote Air Cooled Condenser. 4

5 Check Fan Rotation. 1. Once the remote Air Cooled Condenser is installed, plug the Main Power Supply Lead in to a suitable power supply and turn on the Main switch. 2. Open the Electrical Enclosure door and make sure the Air Circulating Motors (Blue Coloured Motor) are turn in the direction as shown by the arrow on the Motor. If the Motor is turning in the opposite direction. Disconnect the Main Power Supply Lead and swap Active Line 1 with Active Line 2. This will cause the motor to rotate in the opposite (correct) direction. Electrical. The chamber is supplied with a flexible power lead with a 20 amp, 5-pin male plug attached. This needs to be plugged into a 415-volt, 3 phase and Neutral, 20 amps supply socket. Water Supply. Protruding from the roof is a ¼ copper tube with a hose connection attached. This is labelled Water. Connect the water supply accordingly. Water should preferable be filtered and maintained with a neutral ph level. Condensate Drain & Overflow At the rear of the cabinet, on the control enclosure end, there is a 25mm diameter stainless tube. This is the condensate drain, which takes water away from the inside floor of the cabinet. A P trap drain is supplied and needs to be fitted. This P trap drain also connects to the Humidifier drain. Light Loft Ventilation. Two 300mm-diameter spigot s are provided on top of the chamber, so that the hot air exhausted from the light loft can be directed out of the building, using flexible circular duct. The inlet to the light loft is the spigot with the removeable filter. The inlet filter should be cleaned at regular intervals. If they become blocked, a safety thermostat located in the loft air stream will turn off the lamps. 5

6 Thermoline High Light Intensity Plant Growth Cabinets. The Thermoline High Light Intensity Plant Growth Chamber has been designed to provide a controlled environment of temperature, humidity, and lighting, to simulate growth conditions. Limitations of the cabinet are as follows, Temperature Humidity Co2 Lighting 5.0ºC to 45.0ºC 20%RH to 90%RH (Temperature Dependant) Ambient plus 50PPM to 3000PPM. (Optional) Up to 1000µmols (Approx.) at 1 Metre from light source. Theory of Operation. The plant growth chamber can be regarded as comprising of five main areas; these are as follows, Main growth area. Main growth area (workspace). Conditioning area. Light loft area. Control enclosure area. Sensor Housing Conditioned air (temperature and humidity controlled air) enters the growth area vertically, through a series of slots in the floor panels. The floor panels are made from stainless steel to prevent corrosion, and are fabricated in the shape of a Top-Hat section for strength. The floor can be removed to allow access to the sub-floor area for cleaning. The inside of the growth area is mainly white for maximum light reflectivity. The shelf is stainless steel and is supported by a stainless steel frame that is adjustable at 100-mm centres. Conditioning area. Once the air has passed through the growth area, it returns to the conditioning area, through the return fan louvre panel at the top of the Main Growth area. This area contains the following components that are used to maintain the set temperature and humidity of the air: The cooling evaporator coil. The dehumidifying evaporator coil. The thermal expansion valves & solenoids. The humidifier inlet. The air heating elements. The circulating fans. 6

7 Air passes over each of the various components to be either heated or cooled, and to be either humidified or dehumidified. The air is then returned to the growth area by the circulating fans for the whole cycle to begin again. Four centrifugal fan wheels provide air circulation. These wheels are driven by externally mounted motors, which are inside the control enclosure. Air from the fans is forced into the sub-floor area this has the effect of pressurising the area below floor level, to enable the air to enter the growth area at an even rate. Light loft area. This area is separated from the main growth area by two layers of glass. Cool air is drawn into the light loft fan area through the air inlet filter on the end of the cabinet, over the discharge lamps control gear, by a centrifugal fan deck. The air is then forced through the light loft area, across the lamps, and is then exhausted to atmosphere through a spigot on the top of the cabinet. Eight high intensity, High Pressure Sodium, discharge lamps, plus eight-tungsten filament globes provide lighting. Switching the lamps by a series of timers can vary lighting intensity, they are as follows: HPS Timer 1. 3 x 600 watt HPS lamps. (Lamps 1,3 & 5) HPS Timer 2. 2 x 600 watt HPS lamps. (Lamps 2 & 4) Incandescent Timer. 8 x 60 watt incandescent lamps. For lamp configuration see drawing at the rear of this manual. The lamps can be easily changed, with access through the hinged doors on both sides of the light loft. Model No of High Pressure Sodium Lamps: GE Lighting LU 600/40. Alternate Metal Halide Lamp: Venture HIT-600W/HBU/LU/4K. Controls enclosure area. This area contains the following, Sensor Housing. Operators control panel. (Mounted on the front) Electrical control panel. Humidifier steam generator. Refrigeration compressor, pressure controls, solenoids, etc. Miscellaneous other controls (water solenoids, etc.) Inside the 'Main Workspace' you will notice a stainless steel box with a white aluminium top; this box contains the temperature and humidity sensor and a small aspirating fan. When the cabinet is running and controlling the set temperature and humidity, it is very important that the 'Sensor Housing' is located on the shelf alongside the plants. The inlet and outlet airflow of the 'Sensor Housing' must not be restricted in any way. If the airflow is impaired for any reason, you will experience erroneous results. 7

8 Operator s Control Panel. General. The Control Panel consists of the following items, One Temperature Controller (Eurotherm 3216). One Humidity Controller (Eurotherm 3216). One Co2 Controller (Eurotherm 3216). (Optional) One Diurnal Timer to activate the Day and Night Set Values on the Controllers. Function Switches, Main Fans Heat Cool Humid Light Co2 (Optional) Light Timers, HID 1 HID 2 Incandescent Alarm Indicators, High Temp Low Temp High Pressure Low Pressure Loft Safety Humid Off Humid Trip Controllers & Timer. The Temperature, Humidity & Co2 Controller s are all Eurotherm 3216 process controllers. They have all been configured to allow the operator to control Temperature, Humidity & Co2 over the range specified. The Timer is a 24hr time clock that can have its captive pins set to change the Set Value on the Temperature, Humidity & Co2 Controller. Using the Night & Day Set Value (SP1 & SP2), the Ramp Rate Value (SP.rat) and the Time clock, the operator can control Temperature and Humidity to simulate a 24hr cycle. (See paragraph Operation of Diurnal Control). 8

9 Function Switches. There are six function switches provided to enable the main control functions, as follows: Main switch. Fans Switch. Heat Switch. Cool Switch. Humid Switch. Light Switch. Co2 Switch. (Optional) Supplies power to the control and instrument circuits and start the circulating fans. Supplies power to the air circulating fans and allows the operation of the Heat, Cool, Humid and Light functions Supplies power to the solid-state relay, which controls the air elements, and to the humidifier element contactor. Starts the refrigeration compressor and supplies power to the control circuits for the refrigerant solenoid valves. Turns on the water supply control circuit for the humidifier and supplies power to the solid-state relay, which controls the humidifier elements. Also allows the humidity controller output signals to start controlling the set humidity. The Heat Function needs to be active before the Humid can become active. Allows the Lights to be switched on and off by the timer. The lights can be switched automatically by the timer or manually by the operator. (See item 3 in Operation of Diurnal Control). This will engage the Co2 circuit. The Co2 will only be controlled if the Fan Switch is active. Lighting Timers. There are Four (4) 24-hour timers that switch the banks of lighting on and off at selected times. These timers should be synchronised to current time. HPS Timer 1. 3 x 600 watt HPS lamps. (Lamps 1,3 & 5) HPS Timer 2. 2 x 600 watt HPS lamps. (Lamps 2 & 4) Incandescent Timer. 8 x 60 watt incandescent lamps. Alarm Indicators. These indicating lights provide fault indication for the following, High Temperature Safety: Low Temperature Safety: High Pressure Safety: Low Pressure Safety: Indicates an over temperature occurrence within the chamber. The operator must set this Thermostat. Indicates an under temperature occurrence within the chamber. The operator must set this Thermostat. Indicates a High Pressure occurrence within the Refrigeration system. This is a manual resetting device. If it continually trips seek advice from a qualified Refrigeration Technician. Indicates a Low Pressure occurrence within the Refrigeration system. This is a manual resetting device. If it continually trips seek advice from a qualified Refrigeration Technician. 9

10 Loft Safety Humid Off: Humid Trip Safety: Indicates a high temperature situation within the light loft. Usually indication that the Light Loft Fan has failed or the inlet filter need cleaning. This may not indicate that an error has occurred. If the Humid Switch is in the off position the Humid Off Indicator will be illuminated. Also if the Humidifier has no water the Indicator will illuminate. This indicates an over temperature occurrence within the Humidifier Tank. This is a manually resetting device. If it continually trips seek advice from a qualified Electrical Technician. Safety Controls and Interlocks There are a number of safety controls fitted to Thermoline Plant Growth Chambers, some of which are available to the operator and others, which are factory preset, as follows. High Temperature Safety Thermostat. (Operator Adjustable) This thermostat is located on the end of the cabinet at the control side. It measures the air temperature of the workspace. If the workspace temperature exceeds the high temperature safety setting, all the cabinet heating functions, including lamps will shut down. Low Temperature Safety Thermostat. (Operator Adjustable) This thermostat is located adjacent to the high temperature safety thermostat on the end of the cabinet. It measures the air temperature of the workspace. If the workspace temperature exceeds the low temperature safety setting, the refrigeration unit will shut down, which also causes the lamps to turn off. The setting dials on the Safety Thermostats are not particularly accurate. It is therefore critical that a temperature range is not exceeded. Operate the empty chamber at the maximum and minimum temperatures in a cycle and turn the high and low temperature safety thermostats until they trip, at the respective ends, and then turn them slightly higher and lower than the trip points. Please note that if the High or Low Temperature safeties trip the lights will turn off and may take up to 10 minutes to re-ignite again. Element Safety Thermostat. (Not operator adjustable). This thermostat measures the air temperature adjacent to the air heating elements. If air-circulating fans fail or airflow is impaired by the placement of samples, this thermostat prevents the element from overheating. Light Loft Safety Thermostat. (Not operator adjustable). This thermostat measures the air temperature in the light loft. If there is a loft ventilation fan failure or if a dirty inlet filter or a blockage impairs airflow through the loft and lamp control gear, it will turn the lights off until the area cools down. 10

11 Humidifier Safety Thermostat (not operator adjustable). This thermostat measures the temperature adjacent to the heating elements in the humidifier (steam generator). If there is an interruption to water supply (and level interlock fails), this thermostat switches off the heating elements and they remain switched off until it is manually reset. Water Level Interlock. The humidifier tank is fitted with two float switches. The upper level float switch operates a solenoid valve in the water supply, to maintain a constant level in the humidifier supply tank. The lower level float switch is interlocked with the humidity control circuit, such that if the water level falls below this float switch, power to the heating elements is switched off. If the humidity function is turned on and the water level falls below the lower float switch, the Humid Off indicator will illuminate. Electrical Circuit Breakers. These circuit breakers protect the electrical system against major damage from electrical faults. If they are tripped for any reason, determine the cause and rectify the fault before resetting. Refrigeration High & Low Pressure Safety. (Not operator adjustable) This pressure switch shuts down the refrigeration system if the refrigerant pressure is above or below the compressor s operating range. Crankcase Pressure Regulator. (Not operator adjustable). This mechanical regulating device has two functions and are as follows, 1. It prevents the pressure of the refrigerant gas returning to the compressor from rising above its stated tolerance. 2. It provides some degree of refrigeration capacity regulation to balance the heating and cooling systems. Head Pressure Control. (Not operator adjustable) This pressure switch operates the fan on the refrigeration condenser, to maintain the refrigerant pressure when the surrounding ambient air temperature is appreciably lower than the internal chamber operating temperature. Compressor Liquid Injection Thermostat. The temperature sensor of this device is attached to the refrigerant line returning to the compressor. If the temperature of this line becomes hot, because of a high chamber temperature or a long period of system bypass, liquid refrigerant is injected into this suction line to cool the gas returning to the compressor. 11

12 Diurnal Temperature & Humidity Control. Operation of Diurnal Control Switching between two set values within the Temperature, Humidity & Co2 controllers, using a 24-hour time clock generates an alternating Day to Night Temperature, Humidity & Co2 cycle. At the time of delivery the temperature and humidity controllers have been set up with a 2.5ºC and 5%RH per hour ramp rate. As an example the purpose of these ramp values is to allow a 24hr simulation of an Environmental Condition. Changing from 10.0ºC (Night) to 40.0ºC (Day) and 85%RH (Night) to 25%RH (Day). Note that the maximum and minimum temperature and humidity are the Day & Night (SP2 & SP1) set values within the temperature and humidity controllers. Diurnal Lighting Control. The lighting is switched by independent 24-hour time clocks, which provides adjustment of light intensity and the creation of dawn and dusk effects. General Operation. 1. Turn on the main switch. This allows the Eurotherm 3216 Temperature, Humidity and Co2 Controller to operate. The top displays will indicate Actual Temperature, Humidity and Co2, with the bottom displays indicating Actual Set Value (Note 2). At this time the operator will need to set the Day, Night and Ramping Set Value. The Eurotherm Controllers have two Set Values. One for Daytime operation and the other for Night time operation. By pressing the Scroll Key the operator will scroll through four (4) parameters SP1, SP2 and SP.RAT & OFST. The Table below describes the functions of these parameters. SP1 Set Value 1 This is the Night Time Set Value SP2 Set Value 2 This is the Daytime Set Value SP.RAT Ramp Rate Value Note 1 This is the Ramp Rate Value. This value restricts the temperature rate of change within the chamber. This is in units of DegC/Hour OFST Offset This is a One Point offset. It allows the operator to correct any difference between the actual temperature or Humidity and what the controller is reading Note 1: The Ramp Rate value has been utilised to allow the operator to simulate a 24hr Environmental Cycle. Note 2: When the Eurotherm Controller first powers up the Actual Temp, Humidity & Co2 will be identical to the Actual Set Value. The Actual Set Value will then change at the Ramp Rate until the desired Day or Night Set Value is reached. The active Set Value will be displayed via a scrolling message along the bottom of the controller. 2. As the operator presses the Scroll Key and scrolls through the above parameters all that has to be done to change the value is press the Raise or Lower Key to adjust the desired value. 12

13 Page Key Scroll Key Lower Key Raise key Switching Point Mechanism Blue Switching Pins 3. Rotate all the timer discs (clockwise) to synchronise them at a suitable time. The switching point is at the top left corner of the timers. Blue Switching Pins can be moved inwards and outwards around the circumference of the timer disc. Inwards will activate the Day Set Values. Outwards will activate the Night Set Values. Set the Switching Pins in the Inward or Outward position at the times that the lights are required to turn on and off. When the Blue Switching Pins are moved inwards, lights will be switched on. Pushing the Switching Point Mechanism, top left corner of timer, outwards away from the rotating Blue Switching Pins, can manually operate the timer. This allows the Blue Rotating Pin in the middle of the Switching Point Mechanism to be turned manually. Thus turning the lights on and off manually. Note the Permanent (perm) and Automatic (auto) positions. 4. Check that the High and Low Temperature Safety Thermostats are set to protect against out of tolerance conditions but do not interfere with the set temperatures. To set the High Temperature and Low Temperature thermostat, follow the instructions listed. 13

14 High Temperature Safety. Run the chamber at the maximum operating temperature with all lights on, and allow time to stabilise. Turn the high temperature thermostat knob slowly, until the 'High temp.' light on the operator's panel is just illuminated. Now slowly turn the knob slowly back in the opposite direction until the light just goes out. The thermostat is now set at a temperature just above the operating temperature; the cabinet will shut down when this value is exceeded. Low Temperature Safety. Run the chamber at the minimum operating temperature, and allow time to stabilise. Slowly turn the low temperature thermostat knob until the 'Low temp.' light on the operator's panel just goes on. Now slowly turn the knob back in the opposite direction until the light just goes out. The thermostat is now set at a value just below the minimum operating temperature. The cabinet will shut down when the temperature falls below this set condition. 5. Turn on the 'Humid' switch if required. Although the Humidity controller is on and indicating a current Relative Humidity Value if the Humidity switch is not on the Humidity will not be controlled. The lowest attainable humidity is limited by: a) The dew point of the refrigeration evaporator, therefore as temperature rises, lower humidity will be possible. b) The transpiration rate of plants within the chamber. c) The effectiveness of drainage from the cabinet The highest attainable humidity is limited by: a) The operating temperature. (High humidity at low temperature is limited by the dehumidifying effect of the refrigeration system) b) The light intensity. With full lighting the dehumidifying effect of the refrigeration limits maximum humidity to 80% RH. 6. Turn on the Co2 switch if required. Although the Co2 controller is on and indicating a current Co2 Value if the Co2 switch is not on the Co2 will not be controlled. Co2 is controlled in Parts Per Million. Operation of relative humidity with dew point temperatures close to or below 0 C. will result in ice forming on the refrigeration evaporator and loss of cooling and therefore temperature control. This effect is exacerbated with high light intensities because of the additional heat input to the chamber; therefore minimum dew point temperatures under these conditions should be approx. 5 C. 14

15 Adjusting the Calibration Offset. First step is to keep pressing the scroll button until the screen shows the pv.ofs. The following images will be displayed. 15

16 Once the display shows pv.ofs either press the Raise or Lower key to adjust to the required offset. Press the scroll key again to return to the original screen. The offset value will have changed to the new value. The instrument will then increase or decrease the output to alter the operating value. CAUTION: The Offset value with few exceptions is between 0.5 and The need to use a value outside this range should be carefully considered. If in doubt, return the value to zero and recalculate the offset value. 16

17 Regular Checks and Maintenance. Owing to the conditions under which the chamber will operate, some regular checks need to be performed, as follows, The humidifier is continuously evaporating water to produce steamer humidity control. This will leave behind deposits of mineral salts inside the tank, which will eventually form a crust around the elements and may cause premature failure of the elements. It is important that the tank is flushed regularly to reduce this effect. A drain valve is fitted to the humidifier tank to allow it to be emptied. With the power turned off open this valve to drain the tank, and then close it before turning on the power. The water will automatically fill the tank with fresh water. The frequency of this action will depend upon the type of water used and the temperature and humidity conditions set for the plant growth chamber. No water should be allowed to build up in the base of the chamber (below the floors). The floor drain should be checked regularly for blockages. The air intake filter for the light loft should be cleaned regularly, to stop a build up of dust on the light loft glass. Failure to clean this filter could also result in a reduced flow of cool air across the lights, and a subsequent shutdown of the lights because of lack of ventilation. The filter simply pulls out of the intake vent located on the roof above the electrical controls enclosure on the end of the cabinet. Light intensities should be checked with a light meter, and lamps replaced if necessary. The glass between the loft area and the growth area may need cleaning occasionally, as dust build-up will reduce light intensity. The high intensity discharge lights are Model No of High Pressure Sodium Lamps: GE Lighting LU 600/40. Alternate Metal Halide Lamp: Venture HIT- 600W/HBU/LU/4K Intensity at delivery time is nominally 1000µmol/m²/sec. at 1 metre down from lamps (all lamps on) As the refrigeration runs continuously, there is a constant airflow being drawn through the Remote Air Cooled Condenser. Make sure that the Remote Air Cooled Condenser is check and cleaned at regular intervals. It is most important that a regular check of the state of the condenser is performed and any build up of material, which would impair airflow, removed. 17

18 Operating Guidelines for a Hydraulic Adjustable Shelf. The Thermoline Plant Growth Cabinet has been fitted with a Hydraulic Adjustable Shelf/Floor System. This enables the operator to adjust the height of the shelf by 400mm without the need to remove plants or open the door. Shelf/Floor Adjustment. To adjust the shelves simply turn the Shelf Adjustment Arm. A clockwise rotation will raise the shelf and anti-clockwise will lower the shelf. The Hydraulic adjustment allows for 400mm of adjustment without the need to open the doors or remove any Plant s. If more than 400mm of adjustment is needed then the Plant s will need to be removed from the cabinet and the Stainless Steel floor removed. Once the Floor has been removed the Front and Back Floor supports can be removed and raised to the next support level. There are 3 support levels at 300mm centres. This allows for a total of 1000mm of shelf adjustment within the cabinet (See Photos at the end of this document). Please note that the Floor Supports are front and back specific. The Front Support has two blanking plenums that fit between the access doors. This is to prevent the air circulation from short cycling. When adjusting the Shelf Height in an anti-clockwise direction (Lowering the Shelf) you may find that the shelf is not lowering at the same rate at which you are adjusting the arm. This is due to the Hydraulic oil slowly purging back in to the Purge cylinder. Do not be concerned as it will eventually catch up. This will be less noticeable when loaded with plants as the weight helps with the purge of oil. When adjusting the shelf in a clockwise direction (Raising the Shelf) please take great care not to allow the product on the shelf to touch the Glass Roof. Any hard or sharp items could cause the glass to break. As the hydraulic oil in the shelf system is affected by Temperature, you will notice movement of the shelf height. The shelf height will move between mm throughout the 5.0degC to 45.0degC range. Loading the Shelf/Floor. When placing Plant on the floor please load the plant in an even and uniform manner determined by weight not volume. The reason for this is that the four hydraulic rams are connected to one common plunge cylinder. If the Plants are placed unevenly by weight you will find that the floor may not be level. Do not overload the floor. The maximum Total weight that the Hydraulic Shelf system can hold is 300kg. Do not exceed this limit. 18

19 The above image shows the Shelf Adjustment arm. Simply turn this Clockwise to raise the Floor or anti-clockwise to lower the floor Above image shows the left hand floor in place. Please note that the far left and far right floors are specific to the end location. (This can be determined by the additional blanking plenum on the end). The Left and Right floor ends are interchangeable. 19

20 The above image shows the right hand floor in place. Above image shows all of the Floor panels in place. 20

21 Above image shows the Floor adjusted to the middle support on the Hydraulic Ram 21

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