7650 Kimbel Street Mississauga, Ont. Canada L5S 1L2

Phone: (905) 671-3641 Fax: (905) 671-3648 E-mail: hoffa @trellcan.com

TrellSystem is an inflatable self-supported, highly adaptable combat support hospital system designed for operating in chemical warfare environments.

TrellSystem provides inhabitants with an encapsulated environment that seals against chemical invasion, thus affording protection from gasses and aerosols. The system also features protection against chemical liquid infiltration by shrouding the tents with a chemical fly.

The hospital tents can be connected together to provide continuous formations with no loss to the integrity of the environment. The interior environment is overpressured by filtered air and is climate controlled using heaters and air conditioning units.

The Fan Unit is made of high gauge steel containing a radial fan driven by a motor. The Unit is used to re-circulate clean air through the AC-Unit, ACUTE 75C or through the heater unit, VACAN 100.

The Control Unit incorporates a control box with all the equipment necessary to monitor and control the environment during a C-attack. The over-pressure can be monitored on a pressure gauge easily visible on top of the unit.

The VACAN 100 C is designed for heating and ventilation of tentage in a C-environment.

The heater is placed outside the tent with master controls inside the tent. In summer time the unit can operate as a ventilation unit. The unit can also operate as a stand-alone heater. Capacity of the unit is 100 000 BTUs (35kW).

The conditioner consists of a compressor/condenser unit. It is made form high gauge steel with all its components protected from damage during transport and in usage. Temperature adjustment is achieved via a thermostat. The construction surrounding the condenser is specially made for C-environment. Th unit can be fitted with a heating element. The AC-Unit can be utilized as a stand-alone unit in a non-chemical threat environments. Capacity of the AC-unit is 75,000 BTUs (24kW).

The Filter unit is constructed of sheet metal and is complete with carrying handles. The C-filter consists of a fan unit, cyclone, particle filter and an active charcoal filter type ASC 12-30 TDKA. The inlet air first passes through a cyclone removing large particles before the second stage, fine particle filter. After all solids are removed C-contaminated air passes through the active charcoal filter, removing all hazardous gases before entering the tent unit. The filter also acts as an overpressure device for the tent unit. The filter can be used without the charcoal filter. The system is them operated as an ordinary over pressure system.

Tent material is comprised of a flame retardant, self-extinguishing synthetic material that is coated on both sides with PVC. The same material composition is used on the four inflatable self-supporting ribs and a high frequency welded integral floor. Each tent has a minimum of 2 zippered entrances according to the system requirement, with window lighting as necessary. Each tent is designed to attach to additional tents utilizing inflatable gaskets and is secured by means of eyelets, grommets and ropes.

The fly comes in material of high chemical resistance offering protection for more than 24 hours (permeation) as prescribed by the standard NATO testing method for mustard gas (optional)

1. Erect the tent.
   
   Follow the instructions given in "Medical tent system Instruction Manual". For C- Protection also see "Medical tent system C-protection Instruction Manual".

2. Place the air control units
1. Place the Heater/AC-Unit according to figure 7.
2. Place the Filter unit according to figure 7.
3. Place the Fan and Control unit according to figure 7.



Fig 7 Placing the air control units

3. Attach the Hoses

Note: An arrow marker inside the hose shows the direction of airflow. Make sure the hose is attached with the arrow marker in the flow direction.

1. Attach the hose between the Fan and Control unit and the input of the Heater/AC-Unit according to figure 8.

The hose should protrude about 15cm (6") through tent roof.

2. Attach the hose between the output of the heater/AC-Unit and the distribution channel according to figure 8.
3. Attach the hose between the Filter unit and the Fan and Control unit according to figure 8. Depending on use select C-filter or bypass output on the C-filter.
   



Fig 8 Attaching the hoses

4. Connect the cables
1. Connect the electrical cable from the Heater/AC-Unit to the input labeled "AC/HU" on the Fan and Control unit, see figure 9.
2. Connect the electrical cable from the filter nit to the input labeled "C-FAN" on the Fan and Control unit, see figure 9.
3. Connect the power feeding cable to the input labeled "POWER FEEDING" on the Fan and Control unit, see figure 9.
   
   The power should be 208 V AC 60Hz, 1 phase.



Fig 9 Connecting the cables

5. Connect the pressure sensing tube
1. Connect one end of the pressure sensing tube to the Fan and Control unit. Lead out the other end through one of the air intakes.

          The tube is used to sense the air pressure outside the tent.


6. Seal all air intakes
1. Seal all used air intakes by pulling and tying the drawstring.
2. Seal all unused air intakes, see figure 10.



Fig 10 Sealing unused air intakes

3. Seal by winding take around seal between air intake and the hose.
4. Close and seal all service openings by cabling by pulling and tying the drawstring.
5. Close all unused cover flaps inside the tent using the Velcro ribbons.

For further information see "Fan and Control unit Instruction Manual"

1. Set the bypass valve on the C-filter in bypass-position.
2. Move the hose on the C-Filter from the C-Filter to the bypass output.
3. Open the air inlet door and the air inlet lid on the Fan and Control unit FF1.
4. Set the thermostat to desired temperature.
5. Set the Operational choice selector to Stand-by position.

6a. If the heater is used, turn Start switch to Heat-position.

6b. If the AC-unit is used, turn the Start switch to Cool-position.

2. Initiate by turning the Start switch to Start.

1. Set the bypass valve on the C-Filter in Filter-position.
2. Move the hose on the C-Filter from the bypass output to the C-Filter.
3. Close the tent "Doors".
4. Make sure the "Door" zippers are fully down. Fold the lower part of the "door" under the floor mat.
5. Fold up and close the zipper on the floor mat. Make sure the floor mat is fastened on the tent side.
6. On the Fan and Control unit FF1 set the lower limit sensor (red arrow) on the Pressure guard to desired pressure.
7. Set the Operational choice selector to C-Filter position.
   
   The Heater/AC-unit stops temporarily and the C-filter starts building up the overpressure inside the tent. When the pressure reaches the lower limit setting of the limit sensor on the Pressure guard, the Heater/AC-unit starts again.

1. Set the bypass valve on the C-Filter in Filter-position. Make sure the hose is attached to the filter output on the filter unit.
2. Close the tent "Doors".
3. Make sure the "Door" zippers are fully down. Fold the lower past of the "Door" under the floor mat.
4. Fold up and close the zippers on the floor mat. Make sure the floor mat is fastened on the tent side.
5. Open the air inlet door and the air inlet lid on the Fan and Control unit FF1.
6. Set the thermostat to desired pressure.
7. Set the lower limit sensor (red arrow) on the Pressure guard to desired pressure.
8. Set the Operational choice selector to C-Filter position.

9a. If the Heater is used, turn the Start switch to Heat-position.

9b. If the AC-unit is used turn the start switch to Cool-position.

10. Initiate by turning the Start switch to Start.
    
    The C-Filter starts building up the overpressure inside the tent. When the pressure reaches the lower limit setting of the sensor on the Pressure guard, the Heater/AC-unit starts.
    Check regularly that the pressure gauge shows acceptable overpressure and that the tent is expanded.

Top

The medical tent is designed to satisfy the requirements for flexibility which arise in connection with crowded first-aid stations and hospitals in field conditions. The tent system has two types of tents; the medical tent and the connection tent.

The medical tent is primarily intended for surgical or other activities which place high demands upon the surrounding hygiene and working environments. The tent is appropriate for other functions in first-aid stations and hospitals. Medical tent can be connected end-wall to end-wall, allowing for unlimited lengthwise expansion.

The designations for the medical tent in the system diagram is TT 3/2

The basic design of the connection tent is identical to the medical tent. The major difference consists of the possibility of joining other tents on all four sides. Every connection tent thereby allows expansion on all four sides.

The designation for the connection tent in the system diagram is TT3/4

Each tent is individually packed in a tarpaulin and a removable inner groundsheet. Each tent is supported by 4 inflatable rids. Spacing collars are fitted between the ribs to keep the tent stretched out. The accessories are packed in an accessory box.

An air pressure fan is used to inflate the ribs which server as the tent’s supporting components. The fan runs on electricity.

A foot-operated pump is also included in the tent’s accessories as an alternative.

As the tent will be used for medial purposes maximum cleanliness must be observed when handling.

2.1 Tent with inner ground sheet is packed in tarpaulin shown in the figures below.

2. Place the packed tent where it is to be erected. Check the condition of the surface of the ground.



Fig 4

3. Open the tarpaulin. Fold in one flap, and remove the inner ground sheet.



Fig 5

4. Roll the tent off and remove the tarpaulin.



Fig 6

5. Unroll and unfold the tent. If the black-out section is to be used also see step 3.




6. If tent is to be camouflaged, lay net across the tent before inflating the ribs.



Fig 7

7. Close the non-return valve (also see step 5.4).



Fig 8

8. Attach the air pressure fan to the valve on one of the outer ribs (wall without black-out section). Inflate; there is no risk of bursting.



Fig 9


9. "Support the ribs" from inside during inflation.
   Avoid bringing in dirt. Especially important before the inner ground sheet is in place.
10. Fit the spacing collars into place as the other ribs are inflated. Press in the collars between the upper black loop fasteners (about 2 m (6 feet) above the floor) on the sides of the ribs.



Fig 10

11. Place the inner ground sheet with the patterned side facing up.
12. Top off each rib and put on the valve covers. ( If the black-out section is to be used see steps 3.8-3.10).
13. Brace and anchor the tent with the guy ropes and tent pegs. (if several tents are to be connected, see step 4).
    Round double grommet for guy rope.

3. Erecting Black-out section (BOS)

1. Connect the BOS to the tent before inflating the ribs of the tent.
2. The BOS is packed in a tarpaulin.

3. Unpack the BOS and spread it out on the ground.
4. The surplus lining of the tent dome is equipped with oval grommets. The matching end of the BOS is equipped with the grommet clamps.



Fig 12

5. For C-Protection, follow the instructions given in the C-Protection instruction.
6. A rope is attached to the surplus lining of the tent dome for locking the clamps into place.



Fig 13

7. Finish clamping with a knot.
8. Continue erecting the tent. (See steps 2.6-2.11).
9. Inflate the "roof ridge" via the value placed on the outside.
10. Inflate the rib of the BOS
11. Brace and anchor the tent and BOS with guy ropes and pegs.
    

Once the tents are erected they can easily be moved and connected. Use the handles on the ground flap.
The tents are equipped with both grommets and grommet clamps around the "doors" in the end-walls. These permit several connection alternatives.

Fig 15

1. For C-Protection, follow the instruction given in C-protection instruction.
2. Place the tents so close to each other that the grommet clamps on the tent can be inserted into the other tent’s grommets.
   Connection rope on the surplus lining of the dome,



Fig 16

3. Fasten the clamps using the connection rope. Fig 16.
4. Finish the clamping with a knot.

Connection section is primarily used when ground conditions prevent connecting the tents directly end-wall to end-wall.

1. For C-Protection, follow the instructions given in C-Protection instruction.
2. Connect as shown in 4.1 above where relevant.

1. For C-Protection, follow the instructions given in C-Protection instruction.
2. the surplus lining of the side-walls of the connection tent is folded-in and fixed with bands and D-rings.
3. Release the surplus lining and attach to the appropriate tent end-wall as shown in 4.1 above where relevant.

5 Description of specific parts

1. Fit the air distribution channel starting at the end-wall rib where the Fan and Control unit is placed, by fastening the center of the air distribution channel (marker with a black arrow) at the top of the end-wall rib (turn the arrow so it can be seen).
   Then fasten the channel to the black loop fasteners on the remaining ribs using S-hooks so that the channel is stretched.

2. Follow given instructions for installing C-Filter, Fan and Control unit, Heater an AC-unit.
   
3. On the outside of each rib is a spring loaded non-return valve. The valve is usually open when the tent is packed. Close the valve before inflating. This is done be depressing the button in the middle of the valve with a thumb and turning it clockwise. The non-returning valve is closed when button is level with the upper edge.

4. The hose of the air pressure fan, is equipped with a bayonet attachment which fits on the rib. The fitting is equipped with a peg which releases the non-return valve when the fitting is attached. Fig 22.
   The fan is designed so that it cannot supply air pressure exceeding the 18kPa which are permitted. See separate instruction manual for further information.

1. Remove all equipment from the tent and black-out sections.
   
2. Make sure that all windows and flaps are closed.
   
3. Clean the removable ground sheet.
   
4. Fold up the removable inner ground sheet and take it out. After that avoid bringing dirt into the tent.
   
5. Loosen all connections joining the tents.
   
6. Take off the protective covers and open the inflation valve. Do this by depressing the button in the center of the valve with a thumb and turning the button counter clockwise. Remove the spacing collars at the same time. Leave the "doors" open so that all air left in the tent came out. Let the air in the ribs flow out for about 5 min.

1. Let the air out of the black-out section’s rib and "roof ridge", and disconnect it.

1. Roll the tent towards the valves to press out all remaining air and then roll the tent back. Avoid stepping on the tent cloth.
   
2. Fold the tent lengthwise from both sides towards the center. Start with the side-wall without a valve.



Fig 24

3. Fold the tent lengthwise once again.



Fig 25

4. Roll up the tent towards one of the short sides and over onto the tarpaulin which has been laid out. Put the inner ground sheet on top. Fold the flaps over and tighten using the rope.



Fig 26

5. Pack the accessories with the kit and accessory list and check that all equipment is there, as well as its condition.

1. Roll the black-out section towards the rib’s valve to press out all the remaining air and roll it back.
   
2. Fold and pack as shown below.

8.1 Pack the connection sections in their proper casings.

1. Clean the tent cloth with a solution of water and synthetic cleanser such as liquid soap or dishwashing detergent.
2. Remove difficult stains (oil, tar, etc.) with a rag dipped in kerosene.
3. The cloth should be completely dry before packing.

The repair kit is usually included in the equipment when several medical tents are supplied. Glue can be obtained locally when needed. (They are not included because of limited storage life)

Follow these repair instructions for small holes and rips (max 15cm (6")). Larger holes and tears should be repaired at a central workshop.

1. Repairs should be made at room temperature
2. Make sure that the part to be repaired is clean and completely dry.
3. Slightly dampen a rag using acetone or industrial petrol and wash the part to be repaired.
   Do not use engine petrol.
4. Apply plastic glue (such as PVC cement) to both the repair patch and the cloth. (Should take place at room temperature).
5. Allow to dry until the surface no longer sticky. Then press together.
6. Allow to dry for a few hours before exposing the repaired part to any stress.

When a rib is damaged a repair casing can be used for temporary repairs.

1. Repairs should be made at room temperature.
2. Remove the inner tube as shown in step c of the immediate action chart below.
3. Place the repair casing on the inside adjacent to the damaged area (glue into place if necessary)
4. Fit the tube as described below in the instructions for replacing tubes.

Take the following actions when leaking.

1. Valve not screwed tightly enough
   Inflate the tube to maximum pressure and tighten the valve spanner (included with accessories)
2. Dirt in the valve
   Remove dirt by pressing the button in the non-return valve a few times.
3. Damaged rubber membrane
   Replace valve. When replacing the valve the extra rib in the repair kit should be erected, then release the air from the rib with the faulty valve. Remove the nut and washer on the outside of the tent. Open the zipper which is closes to the valve on the rib. Remove the inner tube in one piece and replace the valve.
4. The valve’s flanges have slipper out of the inner tube
   Erect the extra rib from the repair kit (there is no extra rib for the black-pot section). Release the air from the tent rib. Loosen the nut on the valve (so that remaining air can pass through the valve opening).
5. Small hole in the tube
   Erect the loose right from the repair kit. Open the zippers and remove the valve. Pull out the tube through the zipper opening on the opposite side from the valve (so that remaining air can pas through the valve opening).
6. Large hole in the tube
   Proceed as stated above where relevant, and also replace the tube as described below.
   

1. Remove the defective tube as described in 9.2.3 above.

2. Fold the "new" tube lengthwise twice, and with the valve folded over. This is to prevent the tube from being blocked when it is inflated. Make sure that the tube is clean to prevent wear and tear.
   
   
   Fig 28

3. Insert one end of the tube (the one with the valve) through zipper 3. Push the tube towards the "valve hole", so that the valve in the tube meets the hole in the rib. Insert the rest of the tube in the opposite direction.
   Check through the zippers that the tube is not twisted and that is evenly distributed through the rib.
   
   Fig 29
4. Unscrew the nut on the valve and remove the washer. Insert one hand in the zipper opening.
5. Push the valve seat through the hole in the rib and hold the seat there.
6. An assistant puts on the washer and partly tightens the nut from the outside. If the nut is tightened too much when the tube is empty the materials can swell out.
7. Inflate the tube halfway and tighten the nut again, using the valve spanner.
8. Check that the tube lies properly without being twisted or folded, reaches the "floor" at both ends, fills out the rib completely and that no distortion is apparent around the valve. If the tube sits improperly, folds will form around the rib.
9. Close the zippers and inflate the tube.
10. Tighten the nut on the valve once more.
11. To obtain best results, empty the tube and repeat steps g-i when necessary.

To be preformed by the central workshop.
If the zipper in the door opening should break, the "door" can be closed temporarily using the pegs and rope loops.

9.2.6 Repairing the grommets
9.2.6.1 An oval grommet can be repaired most easily by placing a new grommet on the reverse side of the broken one. Repairs should take place at room temperature.

1. Make sure that the surface of the cloth where the grommet is to be placed is clean and completely dry
2. Slightly dampen a rag using acetone or industrial petrol and wash the part to be repaired and the grommet.
   Do no use engine petrol.
3. Apply plastic glue (such as PVC cement) to both the grommet and the cloth.
4. Allow to dry for a few hours before exposing the grommet to stress.

9.2.6.2 If the damaged grommet has to be removed, do so by loosening one edge of the grommet with a knife. Then pull off the grommet using pliers. Be careful to avoid damaging the cloth.

1. Make sure that the surface of the cloth where the grommet is to be placed is clean and completely dry.
2. Slightly dampen a rag using acetone or industrial petrol and wash the part to be repaired and the grommet.
   Do no use engine petrol.
3. Apply plastic glue (such as PVC cement) three times to the cloth and allow to dry between each application. Apply plastic glue to the grommet and allow to dry
4. Press together.
5. Allow to dry for a few hours before exposing the grommet to stress.
   

Repairs should take place at room temperature

1. Remove the damaged part by loosening one edge with a knife, after which the part can be removed with pliers. Be careful to avoid damaging the cloth.
2. Make sure that the surface of the cloth where the grommet is to be fitted is clean and completely dry.
3. Slightly dampen a rag using acetone or industrial petrol and wash the tent part to be repaired and the exchanged part.
   Do not use engine petrol
4. Apply plastic glue (such as PVC cement) three times to the cloth and allow to dry between each application. Apply plastic glue to the part and allow to dry.
5. Press together.
6. If the loop fastener is to be glued on to an inflated rib, it must either be heated with hot air or heated carefully above an open flame so that it can be molded over the rib. The heating takes place after the glue has been applied and dried.
7. Allow to dry for a few hours before exposing the exchanged part to stress.

1. Erect the inflatable components.
2. Examine.
   Be especially observant for any holes, rips and tears and leaks in the inner tubes (leave the tent and black-out section inflated for 3-4 hours when checking).
3. Examine the connection sections.
4. Clean as described in step 9.1
5. Repair as described in step 9.2
6. Check that all equipment is present in accordance with the equipment and accessory lists.
7. Report any damage or shortage
8. Close the non-return valve on the ribs (see also step 5.7).
   The valve springs shall not be subjected to pressure during long-term storage.
9. Tents and black-out sections should be stored separately on shelves.

1. If possible, erect the tents and black-out sections, for checking.
2. Check that all equipment is present is accordance with the equipment and accessory lists, and in good condition.

1. Clean all equipment, as described in step 9.1.
2. Check and report any damage.

Top

This manual describes the actions to take for C-protecting the Medical tent system. The manual shall be used as an addendum to the Medical tent system, instruction manual.

For convenient sealing, place the tents shall be spread out and placed in the way they area going to be connected.

Addendum to medical tent system, instruction manual. Step 4.1.1

2.2.1 Place the tents so close to each other that the grommet clamps on one tent can be inserted into the other tent’s grommets.

2.2.2 Fit the gaskets on the loose grommet clamps

2.2.3 Fit the loose grommet clamps with gaskets into grommets placed around the "door" in one tent. Fasten the clamps with one of the free connection ropes.

2.2.4 Place the C-sealing on the grommet clamps on the tent. Start in the middle/up (marked C-sealing, see Fig 7)

2.2.5 ???????s grommet clamps with attached C-sealing into the other tent’s grommets.

2.2.6 Fasten the clamps using the connection rope. Finish the clamping with a knot when the tent has been raised.
Attach the air pressure fan to the valve on the C-sealing.
Inflate.

Addendum to Medical tent system, instruction manual 4.3.1

1. Place the tents so close to each other that the grommet clamps on one tent can be inserted into the other tent’s grommets.
   
2. Fit gaskets on loose grommet clamps.



Fig 4

3. Fit loose grommet clamps with the gaskets into grommets placed around the "door" in the connection tent. Fasten the clamps with one of the free connection ropes.



Fig 5

4. Place the C-sealing on the grommet clamps on the connection tent. Start in the middle/up (marked C-sealing).
   
5. Push the connection tent’s grommet clamps with attached C-sealing into the connection tent’s grommets.
   
6. Fasten the clamps using the connection rope. Finish the clamping with a knot when the tent has been raised.
   
7. Attach the air pressure fan to the valve on the C-sealing.
   Inflate.

Addendum to Medical tent system, instruction manual, step 3.5

1. Place the C-sealing on the grommet clamps on the BOS. Start in the middle/up (marked C-Sealing).
   
2. Push the BOS grommet clamps with attached C-sealing into the tent’s grommets.
   
3. Fasten the clamps using the connection rope. Finish the clamping with a knot. When the tent has been raised.
   
4. Attach the air pressure fan to the valve on the C-sealing .
   Inflate.

2.5 Door Sealing

2.5.1 When all equipment has been carried in, fold the lower part of the door under the inner floor on the "doors" not used. Fasten the inner floor on the Velcro ribbons on the walls.

2.5.2 Close all unused cover flaps inside the tent using the Velcro ribbons.

2.5.3 Seal between the floors between the tents. Use U-shaped sand bags (optional).

Top

The fan and control unit is used to re-circulate clean air under overpressure through either the AC-unit or through the Heater unit. A control panel on top of the unit is used to monitor and control all air handling and environment control equipment in the system, i.e. C-Filter, AC-unit or Heater unit.

The Fan and Control unit consists of a welded framework that houses the fan, the control unit and an air channel for distributing the incoming air from the C-filter unit to the tent.

The fan draws air through a filter mounted on the side of the Fan and Control unit to the air inlet to the AC-unit or the heater unit. During transport and storage the filter is covered by two doors. When in use, the doors are partly opened and therefore used as sound traps for the air intake. The fan is powered by a 208 V single phase motor shaft. The fan assembly is mounted on rails inside the fan and control unit by three bolts. A shock support is mounted in the motor. The air outlet manifold is held onto the fan by three quick release eccentric straps.

The air outlet has a cover that can be closed during transport. When not in use, the air inlet from C-filter is covered by an air inlet cap.

All air handling equipment is monitored and controlled from the control panel. The control panel is covered with a hinged lid mounted on the top. The lid is locked by an eccentric strap.

The electrical control enclosure consists of a box made from sheet steel, easily removable by loosening two screws, lifting the unit by the handles and unplugging two electrical connectors inside the fan and control unit.

The following is placed on top of the control panel:

• A pressure gauge showing the overpressure in the tent. The pressure gauge gas built in adjustable alarm limits that can be set to make sure the fan unit FF1 supplying air to the Heater or AC-unit does not start until the desired overpressure inside the tent is reached.
  
• Alarm indicators
  OVERCURRENTThe power consumption is too high
  LOW PRESSUREThe overpressure is too low. Contaminated air may intrude into the tent. The fan unit FF1 supplying air
  to the AC-unit or Heater unit will stop.
  AC/HU ALARM An alarm situation has occurred on the AC-unit or on the Heater unit.
  
• Other Indicators
  POWERIndicating power is on.
  C-FILTERIndicating C-Filter is on.
  AC/HU POWERIndicating AC-unit or the Heater unit is on.
  
• Controls
  OPERATIONAL CHOICESwitch for selecting C-filter engagement; Standby – 0 – C-Filter.
  THERMOSTATKnob for setting the desired temperature inside the tent.
  START SWITCHSwitch for selecting AC-unit or Heater. The switch has a spring returned to start position

• Electrical Connections
  
  There are three electrical connectors on the front panel used for attaching the following:
  
  X1APower feeding (208V AC, 60 HZ, 1 phase).
  X2AC-Filter unit (power feeding).
  X3AAC-unit or Heater unit (signal cables).
  

Miscellaneous

• Tie downs
  The Fan and Control unit is equipped with four tie downs for anchoring during transport.
  
• Lift handles
  The Fan and Control unit has four retractable lift handles to use when the unit is moved on wheels or when the unit shall be lifted by hand. The locking lever must be released to retract the lift handles.
  
• Wheels
  The Fan and Control unit has two detachable wheels for easy transportation. The locking lever must be released to retract the wheels. When not in use (during transport and storage) one of the wheels shall be placed in its transport location close to the other wheel. The locking lever must be lifted to be able to insert the wheel shaft.

• Lifted by fork lift.
• Lifted by hand using the four retractable lifting handles.
• Transported on the two detachable wheels.

1. Make sure all electrical connections are disconnected.
2. Make sure all hoses are detached.
3. Close and lock the lid over the control panel.
4. Close and lock the air inlet door.
5. Close and lock the air outlet door.
6. Mount the air inlet cap onto the air inlet from the C-Filter.

1. Place one wheel inside the air outlet to the AC/Heater unit.
2. Place the other wheel in its transport location close to the other wheel. The locking lever must be lifted to be able to insert the wheel shaft.
3. Lift the Fan and Control unit by hand with the four retractable lift handles.
   The locking lever must be released to retract the lift handles.
   The Fan and Control unit can also be lifted by a fork lift.

• During transport on a vehicle or an aircraft, the Fan and Control unit can be secured onto the floor with the four tie-downs.

1. Place the Fan and Control unit inside the tent close to the three air intakes in the tent.
2. Attach all hoses to the Fan and Control unit.
3. Connect the three electrical cables.
4. Connect the pressure sensing tube.
5. Open air inlet doors and air outlet lid for C-filter.

• For further information on installation see "TrellSystem C-Hardened Instruction manual"

1. Set the thermostat to desired temperature.
2. Set the Operations choice selector to Stand-by position.
3. A) If the Heater is used, turn the Start switch to Heat-position.
   B) If the AC-unit is used, turn the Start switch to Cool-position.
4. Initiate by turning the Start switch to Start.
   

1. Set the lower limit sensor (red arrow) on the Pressure guard to desired pressure.
2. Set the Operations choice selector to F-filter position.

• The Heater/AC-unit stops temporally and the C-filter starts building up the overpressure inside the tent. When the pressure reaches the lower limit setting of the limit sensor on the Pressure guard, the Heater/AC-unit starts again.

1. Set the thermostat to desired temperature.
2. Set the lower limit sensor (red arrow) on the Pressure guard to desired pressure
3. Set the Operational choice selector to C-Filter position.
4. A) If the Heater is used, turn the Start switch to the Heat-position.
   B) If AC-unit is used, turn the Start switch to the Cool-position.
5. Initiate by turning the Start switch to Start.

• The Heater/AC-unit stops temporally and the C-filter starts building up the overpressure inside the tent. When the pressure reaches the lower limit setting of the limit sensor on the Pressure guard, the Heater/AC-unit starts again.

Shut down procedure

1. Turn the Start switch to 0-position
2. Turn the Operational choice selector to 0-position
3. If the unit is to be moved, follow the instructions given under "transport"

1. Make sure all electrical connections are disconnected.
2. Make sure all hoses are detached.
3. Close and lock the lid over the control panel
4. Close and lock the air inlet door.
5. Close and lock the air outlet door.
6. Mount the air inlet cap onto the air inlet from C-Filter.
7. Place one wheel inside the air outlet to AC-unit/heater unit.
8. Place the other wheel in its transport location close the wheel.
   The locking lever must be lifted to be able to insert the wheel shaft.

The air intake filter shall be changed regularly, depending on the environment.

Follow the procedure as described below:

1. Open the inlet doors.
2. Unlock the restrictor. Use a screwdriver to turn the screw counter clockwise one half turn and lift the restrictor.
3. Open the doors fully.
4. Release the four screws holding the air filter and remove the filter.
5. Replace with a new filter and fasten the screws again.
6. Close the doors and fasten the restrictors.

If the fan requires replacing, follow the procedure as described below:

1. Remove the top cover on the Fan and Control unit.
2. Loosen the electrical connections in the connection box on the motor.
3. Loosen the three M10 screws holding the fan to the rails.
4. Loosen the four quick release eccentric straps and push the manifold away from the fan.
5. Lift the fan straight up.
6. Mount the new fan and fasten the three M10 screws.
7. Fit the manifold and fasten the four quick release eccentric straps.
8. Make the electrical connections in the connection box on the motor.

If the control panel needs to be replaced, follow the procedure as described below:

1. Open the lid.
2. Loosen two screws holding the control panel.
3. Lift the control panel with the two lift handles just high enough to reach the two electrical connections on the rear side of the control panel.
4. Release the two electrical connectors and remove the control panel.
5. Insert a new control panel just enough to be able to attach the two electrical connectors on the rear side of the control panel.
6. Attach the electrical connectors and fit the control panel in place.
7. Fasten the control panel with the two screws

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The air conditioner consists of a compressor/condenser unit. It is made from high gauge steel with all its components protected from damage during transport and in usage. Temperature adjustment is achieved via a thermostat. The construction surrounding the condenser is specially made for C-environment. The unit can be fitted with a heating element. The A/C-unit can be utilized as a stand-alone unit in peacetime or in non-chemical threat environments. Capacity of the AC-unit is 75,000 BTUs.

The unit consists of two sections

1. Evaporator section encased in leak tight enclosure, contains evaporator coil, blower, by-pass damper and temperature sensor.
2. Condenser section contains compressor, condenser fan, refrigerant valves and controller.

In order to avoid damage and premature failures the unit should be carefully handled, either by means of a fork lift or a crane.

When using a fork lift, ensure that forks are always placed in the middle of the unit as indicated on the frame. When using a crane, always use four slings at least 6 ft long, rated at 1000 lbs. each.

Avoid dragging the unit on the ground behind a vehicle, however if it is a must, tow it from the controller end attaching the tow to the bottom the frame (do not use a lifting/tie down rings for this purpose).

This unit has three models of operation.

• Air conditioning mode
• "C" mode
• "RT" mode

In Air Conditioning mode, the air conditioner as a self contained unit and is being controlled entirely by a built in sensor. It also uses its own evaporator blower. If fresh air is required, the side door on the evaporator section should be open. In this mode, the second connector (remote control connector) should not be connected.

In "C" mode, A/C Unit shall be connected with control unit inside the space being served and in this case remote control connector should be connected. The moment both units are connected, the controller detects this and transfers all functions to the unit inside the tent (space) being served. In this mode of operation, fresh air intake should always be closed and the unit operates in full recirculation. Manual switches like ON – OFF and selector switches are disabled and these functions shall be entered via control unit.

In "RT" mode the unit requires remote thermostat to be connected to remote control connector. Operation is the same as Air Conditioning mode.

Maintenance

Routine maintenance is limited to the follow areas :

• Keep coils clean as far as practicable by removing leaves, grass, dirt etc. This will ensure trouble free operation.
• Once a year verify evaporator blower v-belt (accessible through air inlet) tension and replace if necessary.

• Check fresh air intake filter. Replace insert if necessary. New insert shall be installed with the blue side facing outside. To open insert holder, squeeze it and tilt open.
• From time to time when the unit is in service, switch from one mode to another in order to prevent damper from getting stuck in one position. Use either interconnecting harness or test set.

• V-belt A31
• Filter insert VNF-290 7X x 15X
• Test set DO554

The front panel of the controller has two switches, ON-OFF and MODE SELECT.

The ON-OFF switch turns off the operation of the unit but does not turn the power off to the controller or the crankcase heater.

The cooling or heating is controlled by a present temperature controller. The temperature controller has one temperature sensor and two set points and differential adjustments. One set point and differential adjustment for each mode. These adjustments are not accessible from the outside of the controller.

Visual signs on the front panel are two groups, operation and alarms. Operation signals are: Power On, Heating On, Compressor Running, Cooling On, (liquid solenoid energized) and Evaporator Fan On. Alarm signals are Low and High pressure of refrigerant, Phase Reversal or Phase Missing and Overload Condition.

When the mode switch is set to FAN, then only the evaporator fan turns on. The drain solenoid is enabled, the temperature controller is disabled and all solenoid valves are de-energized. The compressor crankcase heater is energized. Should a fault occur in the evaporator electrical circuit, the magnetic breaker would trip and latch an overload alarm. The overload alarm is cleared using the reset button.

In the cooling mode the: 1. Evaporator fan starts 2. Condenser fan starts 3. Compressor motor turns on. If there is a demand for cooling and evaporator compartment temperature is above that of the pre-set temperature, the liquid solenoid will engage and hot gas and the superheat solenoid valve will remain closed.

When the evaporator compartment temperature falls below the set point then the liquid solenoid valves will energize (open). The liquid solenoid valve and the cooling visual indicator will cycle on and off with temperature rise and fall of the evaporator compartment.

In this mode the evaporator fan motor is on and all the other motors and solenoid valves remain de-energized. The heating element via its contactor will cycle on and off with temperature rise and fall of the evaporator compartment. Should an overheat condition occur then an overload alarm will be latched on and the heat and evaporator fan motor will be de-energized.

Please not that heating is not available on TAC07A units and unit will operate in FAN MODE.

1. Compressor/Heater Circuit Breaker trip will latch overload indicator, disable compressor contactor, disable all refrigerant solenoid valves. Evaporator fan running.
   
2. Condenser/Evaporator Circuit Breaker trip will latch overload indicator, disable both fan motor contactors, disable compressor and all refrigerant solenoid valves and disable heating if in heating mode.
   
3. Control Breakers – 3 pole, 208 volts and single pole, 24 volts will automatically turn everything off when tripper.
   
4. Refrigerant Safeties – High and low pressure remain active for all modes of operation.
   
5. Compressor Thermal Overload from compressor internal thermal switch. The compressor current is monitored by the controller. Should during a compressor run operation, the current fall to zero, then all there solenoid valves will de-energize but the power will remain on the compressor. When the current returns the appropriate solenoid valves with be re-energized.
   

On low pressure fault the following procedure will facilitate a restart.

Press reset button, the low pressure alarm visual indicator will then turn off and remain off for approximately 8 seconds even if the low pressure fault has not been cleared. If the low pressure fault reoccurs the reset button should again be depressed. If after 3 or 4 attempts the fault remains, then the system charge should be checked.

This unit contains HCFC 22 (R22) a substance that if released in the environment will contribute to a serious public health and environmental problem by depleting the ozone layer. Ozone depletion increases the risk of skim cancer and other diseases in humans and is harmful to the plant and animal life.

The equipment shall be serviced and disposed of only in accordance with the ozone depleting substances regulation – Clean Environment Act.

The system uses direct expansion of Freon R22 in the evaporator to produce cooling effect. Flow diagram, drawing R 1918-000 shows major components of the system. Unit has no capacity control and whenever in cooling mode compressor operates continuously. If there is no demand for cooling, the unit switches to by-pass but the compressor remains on.

Two non-resettable switches protect compressor.

• Low Pressure (LP) Cut-out35 psi
  Cut-in60 psi
• High Pressure (HP)Cut-out425 psi
  Cut-in325 psi

And internal overload protector which prevents the compressor winding from overheating.

Charging valve, low pressure and high pressure of refrigerant access valves are located beside the controller and can be used whenever repairs to the system have to be done. Before any recharging or addition of refrigerant, ensure there are no leaks in the system.

Drawing P0805 showing all major electrical components is included as a reference. This drawing identifies all parts which may be required in operation.

When ordering replacement parts, the following information shall be provided.

• Unit serial number
• Unit configuration
• Item name (part number if possible) and description

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The Filter Unit is constructed of sheet metal and is complete with carrying handles. The C-filter consists of a fan unit, cyclone, particle filter, and as an option an activated charcoal filter type ASC 12-30 TDKA. The inlet air first passes through a cyclone removing large particles before the second stage, fine particle filter. After all solids are removed C-contaminated air passes through the active charcoal filter (ABC filter), removing all hazardous gases before entering the tent unit. The ABC-filter is optional equipment for the filter unit. The filter unit also acts as an over pressure device for the tent unit.

The Filter unit consists of a welded framework that houses the fan, the cyclone, the fine particle filter and the bypass-valve for the ABC-filter. The optional ABC filter fits within the framework as well.

The fan draws air from the cyclone and fine particle filter to the bypass valve. The fan is powered by a 208 V single phase motor attached to the fan housing with the fan wheel mounted directly to the motor shaft. The fan assembly is bolted onto the cyclone and fine particle housing. The air outlet manifold is flanged and bolted to the fan air outlet.

The cyclone and the fine particle filter is assembled in a welding housing. The air intake has a wide opening to reduce air inlet speed and thereby cause large particles to fall down to the sand/particle trap. The air then goes to the cyclone where the air is put to the turbulence by shovels mounted inside the cyclone. Via the centrifugal force the particles are separated from the air stream. The particles are collected in a sand/particle trap. This trap has to be emptied daily.

From the cyclone, the air passes through the fine particle filter. The filter is of bag type with class ASHRAE standard 52-76.

The bypass valve is used for selecting the use of ABC-filter. The position of the bypass valve must correspond to the setting of the switch on the control panel at the Fan and Control unit. Otherwise the Fan and Control unit FF1 will not start.

The filter consists of a fine aerosol filter which removes radioactive dust and particles. The penetration value is less then 0.01 %. The ABC filter is also equipped with active charcoal type Chemviron ASC 12 X 30 which removes all hazardous gases.

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