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WARNING: If the information in this manual is not fol-
lowed exactly, a fire or explosion may result causing 
property damage, personal injury or loss of life.

—  Do  not  store  or  use  gasoline  or  other  flammable 

vapors and liquids in the vicinity of this or any other 

appliance.

—  WHAT TO DO IF YOU SMELL GAS

•  Do not try to light any appliance.
•  Do not touch any electrical switch; do not use any 

phone in your building.

•  Immediately call your gas supplier from a neighbor’s 

phone. Follow the gas supplier’s instructions.

•  If you cannot reach your gas supplier, call the fire 

department.

—  Installation and service must be performed by a quali-

fied installer, service agency or the gas supplier.

UNVENTED (VENT-FREE) INFRARED GAS HEATER

SAFETY INFORMATION AND INSTALLATION MANUAL

MODELS CRP16T, CRN18T, CRT26PT AND CRT30NT

Summary of Contents for CRN18T

Page 1: ...y other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediatelycallyourgassupplierfromaneighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a quali fied installer service agency or the gas ...

Page 2: ... This appliance is not convert ible for use with other gases Aftermarket Completion of sale not for purpose of resale from the manufacturer State of Massachusetts The installation must be made by a licensed plumber or gas fitter in the Commonwealth of Massachusetts Sellers of unvented propane or natural gas fired supplemental room heaters shall provide to each purchaser a copy of 527 CMR 30 upon sal...

Page 3: ...s heater WARNING Any change to this heater or its controls can be dangerous WARNING Do not use a blower insert heat exchanger insertorotheraccessorynotap proved for use with this heater Due to high temperatures the appliance should be located out oftrafficandawayfromfurniture and draperies Do not place clothing or other flammable material on or near the appliance Never place any objects on the heate...

Page 4: ... 14 Before using furniture polish wax carpet cleaner or similar products turn heater off If heated the vapors from these products may create a white powder residue within burner box or on adjacent walls or furniture 15 Provide adequate clearances around air openings LOCAL CODES Installanduseheaterwithcare Followalllocalcodes In the absence of local codes use the latest edition of The National Fuel...

Page 5: ... must provide additional fresh air Unusually tight construction is defined as construction where a walls and ceilings exposed to the out side atmosphere have a continuous water vapor retarder with a rating of one perm 6 x 10 11 kg per pa sec m2 or less with openings gasketed or sealed and b weather stripping has been added on openable windows and doors and c caulking or sealants are applied to area...

Page 6: ... Btu Hr the space can support You must provide additional fresh air Your options are as follows A Rework worksheet adding the space of an adjoin ingroom Iftheextraspaceprovidesanunconfined space remove door to adjoining room or add ventilation grills between rooms See Ventilation Air From Inside Building B Vent room directly to the outdoors See Ventila tion Air From Outdoors page 7 AIR FOR COMBUSTI...

Page 7: ...outthe house In the event of a power outage you can use this heater as your primary heat source WARNING A qualified ser vice person must install heater Follow all local codes CHECK GAS TYPE Use only the correct type of gas natural or pro pane LP If your gas supply is not the correct gas type do not install heater Call dealer where you bought heater for proper type heater WARNING This appliance is e...

Page 8: ...s without enough ventilation air may cause mildewtoformfrom toomuch moisture See Airfor Combustion and Ventilation page 5 If high humid ity is experienced a dehumidifier may be used to help lower the water vapor content in the air INSTALLATION Continued For convenience and efficiency install heater where there is easy access for operation inspec tion and service in coldest part of room An optional f...

Page 9: ...ing bracket from wall 5 Plaque Heaters 3 Plaque Heater 18 3 4 47 6 cm Min 16 40 6 cm Min 14 35 6 cm 18 3 4 47 6 cm Min 12 30 4 cm Min Adjoining Wall 14 35 6 cm Adjoining Wall Only Insert Mounting Screws Through Last Hole On Each End Only Insert Mounting Screws Through Last Hole On Each End Floor Floor Figure 8 Mounting Bracket Clearances 18 3 4 47 6 cm Min 16 40 6 cm Min 14 12 30 4 cm Min Adjoinin...

Page 10: ...izontal slots onto stand out tabs on mount ing bracket Installing Bottom Mounting Screws 1 Locate two bottom mounting holes These holes are near bottom on back panel of heater see Figure 12 2 Mark screw locations on wall 3 Remove heater from mounting bracket 4 If installing bottom mounting screws into hollow or solid wall install wall anchors Follow steps 1 through 4 under Attaching To Wall Anchor...

Page 11: ...Foot CONNECTING TO GAS SUPPLY WARNING This appliance requires a 3 8 NPT National Pipe Thread inlet connection to the pressure regulator WARNING Aqualifiedservice personmustconnectheatertogas supply Follow all local codes WARNING For natural gas never connect heater to private non utility gas wells This gas is commonly known as wellhead gas IMPORTANT For natural gas check gas line pressure before co...

Page 12: ...s This keeps them from going into heater controls If sediment trap is not installed or is installed wrong heater may not run properly IMPORTANT Hold the pressure regulator with wrench when connecting it to gas piping and or fittings Do not over tighten pipe connection to regulator The regulator body could be damaged Tee Pipe Cap Joint Nipple INSTALLATION Continued Tee Joint Reducer Bushing to 1 8 N...

Page 13: ...g main gas valve located on or near gas meter for natural gas or using compressed air 3 Check all joints from gas meter for natural gas see Figure 17 or propane LP supply tank for propane LP gas to equipment shutoff valve see Figure 18 Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak 4 Correct all leaks at once PRESSURE TESTING HEATER GAS CONNECTIONS 1 Open equipm...

Page 14: ... Turn control knob clockwise to the OFF position 5 Wait five minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety information above If you donʼt smell gas go to the next step 6 Turn control knob counterclockwise to the PILOTposition Press in control knob for five 5 seconds 7 With control knob pressed in push down and release ignitor but...

Page 15: ...t flame should be blue and have no yellow or orange color TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1 Turn control knob clockwise to the OFF position 2 Turn off all electric power to the appliance if service is to be performed Shutting Off Burner Only pilot stays lit Turn control knob clockwise to the PILOT position THERMOSTAT OPERATION The thermostatic control used on these models differs f...

Page 16: ...that you clean the unit every three months during operation and have heater inspected yearly by a qualified service person We also recommend that you keep the burner tube and pilot assembly clean and free of dust and dirt To clean these parts we recommend using compressed air no greater than 30 PSI Your local computer store hardware store or home center may carry compressed air in a can You can use...

Page 17: ...d gas supply propane LP gas 5 ODS pilot is clogged 6 Gas regulator setting is not correct 7 Control knob is not in pilot position REMEDY 1 Replace pilot assembly 2 Replace pilot assembly 3 Reconnect ignitor cable 4 Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry 5 Replace ignitor cable 6 Replace piezo 7 Tighten nut holding piezo ignitor Nut is located inside heater cabi...

Page 18: ...ob pressed in 30 seconds 3 Fully open equipment shutoff valve 4 Hand tighten until snug then tighten 1 4 turn more 5 A Contact local natural or propane LP gas company B Clean ODS pilot see Cleaning and Maintenance page 16 or replace ODS pilot assembly 6 Replace pilot assembly 7 Replace control valve 8 Wait one minute for safety in terlock system to reset Repeat ignition operation 1 Cleanburnerorifi...

Page 19: ...d service person 1 Turn control knob to the low est position and let warm up for a minute 2 Operate burner until air is removed from line Have gas line checked by local natural or propane LP gas company 3 Observe minimum installa tion clearances see Figure 4 page 7 4 Clean burner see Cleaning and Maintenance page 16 or replace burner orifice 1 Turn heater off when using furniture polish wax carpet ...

Page 20: ...tement at top of page 1 Not enough fresh air is available 2 Low line pressure 3 ODS pilot is partially clogged 1 Gas leak See Warning statement at top of page 2 Control valve defective 1 Foreign matter between con trol valve and burner 2 Gas leak See Warning statement at top of page REMEDY 1 Ventilate room Stop using odor causing products while heater is running 2 Refill supply tank 3 Locate and co...

Page 21: ...Ignition Piezo Pressure Regulator Setting 6 W C Inlet Gas Pressure in of water Maximum 10 5 Minimum 7 CRT26PT Rating 26 000 Btu Hr Variable Type Gas Propane LP Only Ignition Electronic Pressure Regulator Setting 8 W C Inlet Gas Pressure in of water Maximum 14 Minimum 11 CRT30NT Rating 30 000 Btu Hr Variable Type Gas Natural Only Ignition Electronic Pressure Regulator Setting 6 W C Inlet Gas Pressu...

Page 22: ...BREAKDOWN CABINET BODY MODELS CRP16T CRN18T CRT26PT AND CRT30NT 8 5 7 4 1 2 12 13 9 6 10 3 11 6 See Pages 24 and 25 AA Battery Positive UP AAA Battery Negative UP Install Battery According To This Illustration Determine which ignitor your heater uses ...

Page 23: ...Back Panel 1 6 097159 04 Piezo Ignitor 1 111435 01 Electronic Ignitor 1 7 099066 02 Mounting Bracket 1 8 098271 09 Ignitor Cable 1 098271 11 Ignitor Cable 1 9 109303 03 Baffle 1 109303 04 Baffle 1 10 098522 24 Thermostat Gas Valve 1 11 103256 02 Inlet Tubing 1 12 099415 18 Gas Regulator Propane LP 1 099415 19 Gas Regulator Natural Gas 1 13 104819 02 Regulator Bracket 1 PARTS AVAILABLE NOT SHOWN 1006...

Page 24: ...om 107883 01J 24 5 6 7 4 6 3 1 2 Burner Assembly CRT26PT and CRT30NT ILLUSTRATED PARTS BREAKDOWN BURNER ASSEMBLY MODELS CRP16T CRN18T CRT26PT AND CRT30NT 5 7 6 4 3 1 2 Burner Assembly CRP16T and CRN18T 2 ODS Pilot 1 ...

Page 25: ...A C 1 2 7 099056 01 Injector Plaque B 1 099056 02 Injector Plaque B 1 If replacing ODS pilot and your model is pre 2002 your part number will be 099059 07 for natural gas models 103594 04 for propane LP models The thermocouple part number will be 098514 01 for both gases The electrode part number will be 098594 01 for both gases PARTS LIST This list contains replaceable parts used in your heater W...

Page 26: ...ready model number of your heater the replacement part number SERVICE HINTS When Gas Pressure Is Too Low pilot will not stay lit burner will have delayed ignition heater will not produce specified heat propane LP gas supply may be low Youmayfeelyourgaspressureistoolow Ifso con tact your local natural or propane LP gas supplier TECHNICAL SERVICE You may have further questions about installation oper...

Page 27: ...5 4828 Laporte s Parts Service 2444 N 5th Street Hartsville SC 29550 7704 843 332 0191 Parts Department Cans Unlimited P O Box 645 Taylor SC 29687 0013 803 879 3009 1 800 845 5301 cuisales aol com Tool Equipment Co 5 Manila Ave Hamden CT 06514 0322 1 800 397 7553 203 248 7553 Portable Heater Parts 342 N County Rd 400 East Valparaiso IN 46383 9704 219 462 7441 1 888 619 7060 www portableheaterparts...

Page 28: ...hrough authorized dealers of this product and or DESAHeating Products who will provide original factory replacement parts Failure to use original factory replacement parts voids this warranty The heater MUST be installed by a qualified installer in accordance with all local codes and instructions furnished with the unit This warranty does not apply to parts that are not in original condition becaus...

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