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UH68 ODK/ODH Tent Heater

Operators Instructions

2-3

Table 5.
Key Description

Function

1

Inlet Adapter

Attachment point for return air duct

2

Storage compartment

Storage for stack, fuel lines, power cord etc.

3

Exhaust elbow

Exhaust stack rests on top

4

Stack support

Holds exhaust stack securely

5

Exhaust stack

Double wall exhaust stack for extra safety

6 PUDA

P

op

U

p

D

uct

A

dapter, attachment point for supply duct

1

6

5

2

3

4

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7
8
9
10
11
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Summary of Contents for UH68ODH

Page 1: ...8324 Heater Tent Model UH68ODK UH68ODH Manual for UH68G1 with Hunter Part Number 53100 Outdoor Kit Installed and UH68ODH Part Number 168325 Hunter Manufacturing Company 30525 Aurora Rd Solon OH 44139 www huntermfgco com ...

Page 2: ......

Page 3: ...on monoxide is without color or smell but can kill you Breathing carbon monoxide produces symptoms of headache dizziness loss of muscular control a sleepy feeling and coma Brain damage or death can result from heavy exposure Carbon monoxide occurs in the exhaust fumes of fuel burning heaters and internal combustion engines Carbon monoxide can become dangerously concentrated under conditions of no ...

Page 4: ... severe burn injuries if contact with bare skin occurs During heater operation air leaving the HEATED AIR OUTLET of the heater and passing through outlet duct may exceed 220 F Make sure tent personnel are aware of burn hazards and equipment hazards presented by the heated air Combustible material must be kept at least 2 feet away from the sides of the heater during operation Do not attempt service...

Page 5: ...s of diesel fuel and JP8 to generate heated air Fuel is pumped from remote tank to the carburetor drawn through the fuel jet by venturi action of the mixer nozzle ignited and burned in the heat exchanger A fan capable of delivering up to 2 IWC static pressure blows the heated air into the tent The UH68ODK has the following applications Alaska tent Temper Tent Medium and small soft wall shelters Fe...

Page 6: ...ent to the carburetor is necessary for other fuels Gasoline or MOGAS is not recommended for use on the UH68ODK Environmental Temperature Range 65 to 120 F Elevation 10 000 feet MSL Authorized Fuels NOTE HUNTER MFG DOES NOT RECOMMEND THE USE OF GASOLINE OR MOGAS or JP4 Ambient Temperature Specification Military Symbol Above 20 F 6 7 C VV F 800 DF 2 Above 25 F 33 3 C VV F 800 DF 1 Above 25 F 33 3 C ...

Page 7: ...lation 2 Room Thermo Set for desired temperature 3 Main Power LED green Indicates heater is plugged in to AC power 4 Standby LED green Indicates main switch is ON but room thermo is not calling for heat 5 Heat LED green Indicates main switch is ON and combustion system is energized 6 Fault LED red Blinks a diagnostic code for corresponding fault see fault codes table 3 Heat output is constant Rais...

Page 8: ...sed 8 Ignition Fault Lockout Note Only the Ignition fault lockout will shut down the heater Any other code will flash the red led but still allow the heater to operate normally Table 4 Key Connection Fitting Function 1 Power Receptacle Connection for power cable 2 Remote Control Receptacle Connection for remote control 3 Fuel Inlet QD fitting for fuel supply 4 Fuel Overflow QD fitting for fuel ove...

Page 9: ...t point for return air duct 2 Storage compartment Storage for stack fuel lines power cord etc 3 Exhaust elbow Exhaust stack rests on top 4 Stack support Holds exhaust stack securely 5 Exhaust stack Double wall exhaust stack for extra safety 6 PUDA Pop Up Duct Adapter attachment point for supply duct 1 6 5 2 3 4 ...

Page 10: ...rs Set up off ground using skid or similar 2 Open PUDA 1 and remove remote control 2 power cord 3 and inlet adapter 4 3 Attach inlet adapter 4 to heater and attach return duct 5 using band clamp 6 Pay special attention to airflow tag 7 on duct DO NOT PUT RETURN DUCT ON BACKWARDS This will restrict incoming airflow 4 Deploy PUDA 1 by tilting upwards and putting pins 8 in supports 9 5 Attach supply ...

Page 11: ...UH68 ODK ODH Tent Heater Operators Instructions 2 5 4 5 4 6 7 8 9 10 6 7 Supply Return 12 ...

Page 12: ...eed Adapter 15 Make sure drain cock 18 on supply line 17 is closed Attach supply line 17 to heater QD fitting 19 Move the fuel can 14 as far away from the heater as possible without pulling the fuel supply line 17 taught 11 Attach overflow line 20 NOTE Open end of overflow hose should discharge to a safe outside location along a downslope and below the level of the heater A piece of commercial pet...

Page 13: ...UH68 ODK ODH Tent Heater Operators Instructions 2 7 15 14 16 17 18 19 14 17 MAX DISTANCE 20 21 22 23 24 ...

Page 14: ...when the heat exchanger comes up to temperature The amount of time will vary 30 to 120 seconds depending on the ambient temperature Once the vent fan comes on the heater will continue to operate until the call for heat from the room thermo is satisfied or the main switch is turned off If the airflow is reduced due to very high back pressure the burner will cycle off from time to time 4 Adjust room...

Page 15: ... fuel can full to prevent condensation in tank 2 Clean snow and ice from fuel can filler to prevent moisture from entering fuel can causing fuel line freeze up 3 Rotate the room thermo fully counter clockwise to the lowest detent setting Turn main switch to heat Allow heater to stand for about sixty seconds This allows the carb heater to reach operating temperature before heater is started Operate...

Page 16: ...nd allow heater to cool 3 Close drain cock 1 on supply line Using a rag or fuel absorbent mat remove supply line from heater at QD fitting Make sure to hold rag beneath heater QD fitting to catch any fuel left in the fitting 4 Attach heater QD cover 2 5 Hold supply line 3 above fuel can and open drain cock 1 Raise as high as possible to let fuel drain into fuel can 6 Close drain cock 1 and detach ...

Page 17: ...UH68 ODK ODH Tent Heater Operators Instructions 2 11 1 2 2 3 4 5 6 5 6 7 1 ...

Page 18: ...nt 13 Secure with spring hold down 12 8 Store fuel lines in storage compartment 13 9 Fuel can adapter may be left on the fuel can Make sure to close the air vent 17 Heater can now be transported Packing using duffle bag 1 collapse both ducts 14 together 2 place band clamps 15 over collapsed ducts 3 place stack 11 inside ducts 4 place all inside duffle bag 16 5 Fuel can adapter may be left on the f...

Page 19: ...UH68 ODK ODH Tent Heater Operators Instructions 2 13 8 9 10 11 12 13 15 11 14 14 16 11 16 14 17 ...

Page 20: ... is ready for operation at all times B Before Operation A After operation D During Operation Q Quarterly Description Ref Para Daily Monthly Semi Annually Annually Interval Fuel Line system 1 1 BDA Exhaust Stack 1 2 B Fuel Supply 1 3 X BD 9Hrs Electrical Connections 1 4 B Remote Control Panel 1 5 B PUDA 1 6 B Ducts 1 7 B Sediment Bowl 1 8 1000 Hrs Carburetor 1 9 500 Hrs Burner Head 1 9 X Igniter 1 ...

Page 21: ...ure cord is securely plugged in to power supply 1 5 Remote Control Panel check cord for nicks or cuts Check overall condition of control box 1 6 Pop Up Duct Adapter check for cuts in fabric In the field repair cuts with duct tape Cuts may be sewn shut If cut is too large to be sewn shut replace entire fabric interface 1 7 Ducts check for cuts in fabric In the field repair cuts with duct tape Cuts ...

Page 22: ... 3 Clean carbon deposits in this area Use a small wire brush 5 Finish up with solvent wash commonly used in parts cleaning stations or carb cleaner Let dry before assembly 4 Clean these areas using compressed air CAUTION Wear appropriate eye protection when performing this operation 3 3 ...

Page 23: ...n hour or so to loosen up carbon deposits 3 With a flashlight look for dirt or carbon here Dirt may be blown out using compressed air Do not use a pick or any hard tools to clean this area Mixer Assembly There are two concentric rings here The center ring is paper thin Inspect for dents scratches and nicks This area must be free of dirt and carbon 4 Clean this area using a soft cloth and solvent W...

Page 24: ...r heater has good combustion Figure 1 shows the mixer assembly properly seated in the burner head carburetor not shown for clarity Figure 1 Figure 2 shows the mixer incorrectly seated If left in this position combustion air will leak past the mixer and cause poor combustion and hard starting Figure 2 3 5 ...

Page 25: ... exchanger must be inspected annually or more frequently if heater usage is heavy A damaged heat exchanger can allow poisonous gases to seep into the heated enclosure causing illness or death to occupants Inspect heat exchanger in accordance with the procedures in TM 5 4520 253 13 1 13 Overheat Safety System The overheat safety switch must be cycled before heater is used after storage or replaceme...

Page 26: ...UH68ODK Tent Heater 3 7 ...

Page 27: ...ses The amount of time will vary 30 to 120 seconds depending on the ambient temperature 5 Once the vent fan comes on the heater will continue to operate until the call for heat from the room thermo is satisfied or the main switch is turned off If the airflow is reduced due to very high back pressure the burner will cycle off from time to time This is normal Blink Code Troubleshooting Blinks Para P...

Page 28: ... 100uF D5 4 7V C3 22uF D9 LED R19 150 D10 LED R22 150 ZCC 1 2 3 6 5 4 U4 MOC3031 R11 180 M2 M1 G U7 R14 180 R6 38 C9 0 01uF R7 1K ZCC 1 2 3 6 5 4 U6 MOC3031 R12 180 M2 M1 G U9 R13 180 R3 38 C10 0 01uF R5 1K J9 Cir Brk2 J8 Cir Brk1 D3 MOV D1 MOV D2 MOV 1 2 3 4 5 6 J12 CONN H6 1 2 3 4 5 6 J10 CONN H6 D12 LED R21 150 1 4 8 5 6 7 TR1 24 V 1 5A 1 2 J11 CONN H2 1 2 J15 CONN H2 1 4 8 5 6 7 TR2 8V 300mA A...

Page 29: ...ter as defined in PMCS If fuel runs out of pump at a good steady rate pump is ok 1 4Check Fuel Flow at Carburetor remove fuel needle 1 start heater when combustion blower comes on fuel should run from the fuel needle hole If not fuel flow has been stopped up stream Check fuel solenoid and float bowl needle and seat 1 5Check Ignition Transformer CAUTION The ignition transformer develops 10 000 volt...

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