Operating instructions
Contents
1. 13 Truma Combi Technical Data 14 Truma Combi MANUFACTURER S LIMITED WARRANTY oli 19 Maintenance and service 16 Decalcifying and cleaning the water container 16 Pressure relief valve cece eceueseseeeseeeeaeeesneenness 17 Replacing the 12 volt fuse 17 Troubleshooting 18 Appendix 19 California Proposition 65 lists chemical sub stances known to the state to cause cancer birth defects death serious illness or other re productive harm This product may contain such substances be their origin trom fuel combus tion gas or components of the product itself Intended use The Truma Combi LP gas furnace with supple mentary indirect water heating may be used only in recreational vehicles RVs for heating the room and the tap water Recreational vehicles RVs are designed as temporary living quarters for recreation travel and or camping RVs have their own power or are towed by another vehicle Models e Truma Combi eco Truma Combi eco plus ruma Combi comfort Truma Combi comfort plus The Truma Combi eco plus and the Truma Combi comfort plus furnaces also feature elect2. Danger of damage to the gas system For the operation of gas pressure regulation sys tems gas burning devices or gas systems only gas cylinders which supply gas in the gaseous phase may be used Gas cylinders which supply gas In the liquid phase are prohibited Ensure that the interior of the RV is suf ficiently vented The Truma Combi furnace might briefly emit smoke and an odor be cause of dust or dirt when it is switched on especially If it has not been used in a long time For using the Truma Combi furnace in hot water mode 140 F 60 C let it heat up several times Hot air can be dangerous especially for in fants children the elderly or infirm It can Cause burns Ventilation air can reach 250 F 121 C at the warm air outlets Always check the air temperature before varying the air throttle position Fig 1 H e Hot water can be dangerous especially for infants children the elderly or infirm It can cause severe burns Never actuate the pressure relief valve Fig 1 L as long as the Truma Combi fur nace is under pressure and or still hot Never actuate the drain valve Fig 1 E as long as the Truma Combi furnace is under water pressure and or still hot Always check the water temperature be fore entering a shower or bath e How long before hot water causes skin damage Temperature Time before skin becomes F C scalde
3. ON By K NN a I N Truma Combi Patent Pending LP Gas Furnace with Supplementary Indirect Water Heating WARNING Operat ing Instructions FIRE OR EXPLOSION HAZARD To be kept in the vehicle Failure to follow safety warnings exactly could result in serious injury death or property damage Do not store or use gasoline or other flammable vapors and liquids in the vicin ity of this or any other appliance WHAT TO DO IF YOU SMELL GAS e Evacuate all persons from the vehicle e Shut off the gas supply at the gas container Or source e Do not touch any electrical switch or use any phone or radio in the vehicle e Do not start the vehicle s engine or electric j generator NI e Contact the nearest gas supplier or certified Intertek service technician for repairs 4010007 e f you cannot reach a gas supplier or certi fied service technician contact the nearest fire department e Do not turn on the gas supply until the gas leak s has been repaired Installation and service must be performed by a qualified installer service agency or the gas Supplier This document is part of the furnace S Conforms to ANSI UL Std Z21 47 2012 Certified to CAN CSA Std 2 3 2012 truma Table of Contents Intended use 2 Prohibited use 2 Mounting arrange
4. 1 Use the main switch or pump switch to switch off the power to the water pump assembly 2 Turn off or disconnect the city water connec tion if present 3 Open all water release points e g cold and hot water faucets showers toilets 4 Open the drain valve refer to Opening the drain valve on page 10 The water container will drain via the drainage socket of the drain valve Winterizing NOTICE Severe damage to the plumbing components and the Truma Combi furnace Damage due to freezing or an unsuitable win terizing fluid is not covered by warranty e Follow the recommendations below If the Truma Combi furnace will be stored under freezing conditions or for an extended period of time e Winterize the Iruma Combi furnace at the Start of the winter season or before traveling to a location where freezing conditions are likely For winterizing drain the Truma Combi fur nace refer to Draining the water container on page 13 After draining the water the Iruma Combi fur nace Is protected against freezing conditions Optional Winterizing the RV with a winterizing fluid Winterizing the RV with a winterizing fluid is only possible with an installed bypass Kit not In scope of supply refer to the RV manual 1 Drain the water container refer to Draining the water container on page 13 2 Turn the valves of the bypass kit accord ing to the supplier s or RV manufacturer s g
5. Truma Combi comfort plus models Plastic frame feet Aluminum frame feet Circulated air fan Fan for combustion air Cold water connection inlet Hot water connection outlet Gas shut off valve behind the cover Gas connection inlet Test connection gas behind the cover Electronics housing cover Recessed grips Original type plate Duplicate type plate Consumer Safety Information Safety symbols and signal words A This is the safety alert symbol This symbol alerts you to potential hazards that can kill or hurt you and others PNA indicates a hazardous situation which if not avoided will result in death or serious Injury WARNING indicates a hazardous situation which if not avoided could result in death or serious Injury A CAUTIONI indicates a hazardous situation which if not avoided could result in minor or moderate Injury NOTICE js used to address practices not related to physical injury Other important information or tips Safety behavior and practices Ensuring a safe operating environment Danger of suffocation To ensure dissipation of exhaust gases operate the Truma Combi furnace outdoors only Never use in enclosed Spaces or tents or breathe in the exhaust gases It installing an airtight awning make sure that the exhaust system terminates to the outdoors Use the Truma Combi furnace only with a functional LP gas and carbon monoxide detector installed in the RV
6. For installation operation and function test follow the manu facturers guidelines Keep the area around the Iruma Combi furnace free from combustible materials gasoline and other flammable vapors or liq ulds such as pressurized dispensers or wax candles Keep the area in front of the warm air outlets Fig 1 H free of combustible or heat sen sitive materials Do not put any material into the warm air outlets In order to avoid overheating of the Truma Combi furnace keep the air inlets of the Truma Combi furnace Fig 2 11 the air openings to the area in which the Truma Combi furnace is installed Fig 1 D and the spacing around the Truma Combi furnace free of obstruction To ensure clean combustion keep the wall cowl free of obstruction Do not lean any ob jects against the wall cowl Fig 1 F Danger of hot surfaces The temperature of the exhaust gases can reach 320 F 160 C Do not touch the area around the wall cowl and do not lean any objects against the wall cowl or the RV Responsibilities of the operator The operator is responsible for the water filled into the Truma Combi water container and Its quality The operator is responsible for protecting the Truma Combi furnace against freezing Safe operation Use with LP Gas propane only Butane or any mixtures containing more than 10 of butane must not be used LPG tanks must be filled by a qualified gas supplier only
7. and there Is a risk of freezing all water must be drained from the wa ter container refer to Draining the water con tainer on page 13 Selectable modes of operation The CP plus control panel Fig 1 B is used to switch between modes of operation refer to the CP plus manual for additional instructions 1 Heating mode The furnace automatically selects the proper operating level based on the difference between the desired temperature set at the control panel and the current room temperature If there is any water in the water container it will be heat ed automatically The water temperature will not be regulated but it will reach a maximum of 1602 F 727C 2 Hot water mode only if water container contains water Hot water mode Is ideal if only hot water is re quired The lowest burner setting suffices for heating water In hot water mode the burner will switch off as soon as the water reaches the tem perature selected in the CP plus control panel Both modes of operation can be combined Selectable modes of power input The CP plus control panel is used to select vari ous modes of energy for the Truma Combi eco plus and Combi comfort plus models No Truma Combi furnace operates in any mode without a 12 VDC power supply 1 LP gas for gas mode All Truma Combi furnaces run on LP gas propane 2 Electricity for electric mode The Truma Combi eco plus and Combi comfort plus furnaces can be po
8. detaching or reattaching the connec tion cover Fig 8 5 take care to neither dislodge nor pinch the connector cables e A defective fuse must be replaced with the same make and model of fuse 10 AT time lag 5 X 20 mm IEC 60127 2 Standard Troubleshooting Faults occurring during operation of the Truma Combi furnace are displayed as an error code on the CP plus control panel refer to the Troubleshooting section in the CP plus manual for additional instructions The potential cause as well as a solution is described according to the error code in the CP plus manual The potential causes for problems with the water system and the Truma Combi furnace are de scribed below Problem Potential cause Solution Water heats up too slowly Lime scale hard water calciti cation in the water container Decalcify the water container refer to Decalcifying and cleaning the water container on page 16 Water drains The hot water container cannot be refilled The drain valve is open Close the drain valve The water container cannot be emptied even though the drain valve is open The drainage socket of the drain valve is obstructed Remove any obstructions such as slush ice or leaves from the open ing of the drainage socket Make sure that the faucets are opened in the position hot Water is dripping flowing from the drainage socket of the drain valve Water pressure i
9. due to overheating If you use an exten sion cord on a cable drum to connect the RV to the campground power system make sure the cord Is Tully extended Filling the water container NOTICE Damage to the water container If you want to connect your system to city wa ter make sure that a suitable pressure reducer is installed Fig 1 K The water container must not be filled with a pressure exceeding 40 6 psi 2 8 bar 1 Close the drain valve if open refer to Closing the drain valve on page 10 2 Close open bypass lines if present 3 Turn on the fresh water supply or switch on the water pump 4 Fill the plumbing system Open all water release points e g cold and hot water faucets showers toilets Once water flows the plumbing system is ventilated and filled Close all water release points Switching on the furnace For the furnace to work properly there must be enough LP gas propane gt 11 In wc and 12 VDC power Optionally for electric or mixed mode with the Truma Combi eco plus and Iruma Combi comfort plus an addition al 120 VAC power supply is needed 1 Switch on the furnace s 12 VDC power supply 2 f necessary fill the water container with wa ter refer to Filling the water container on page 11 If no hot water is needed the Truma Combi furnace can be operated with out being filled 3 Make sure the supply of LP gas is turned on at the tank 4 Make sur
10. acing a child in the bath or shower e Do not leave a child or an infirm person in the bath unsupervised How the Truma Combi furnace works The Truma Combi furnace was developed exclu Sively for use In recreational vehicles RVs The Truma Combi is a furnace with an supple mentary indirect hot water generator All Iruma Combi models are powered by pro pane and a 12 V power supply The Truma Combi eco plus and Truma Combi comfort plus models are also powered by elec trical heating elements for operation at a supply voltage of 120 VAC Room air is drawn into the furnace by a fan heated up and conveyed via flexible ducts to the RV s Interior The Truma Combi furnace with supplementary water heating is installed between the RV s fresh water supply line and its hot water plumb ing system The water pressure on the Inlet side must be limited to 40 6 psi 2 8 bar If necessary install a ruma pressure reducer Fig 1 K A comfortable water temperature at the shower head is reached by mixing in cold water A wall cowl allows combustion air to flow into the furnace and exhaust gas to flow out The wall cowl and the furnace are connected by a tube In the tube exhaust venting system an ex haust tube inside and a combustion air intake tube outside NOTICE Damage to the Truma Combi furnace caused by freezing The Truma Combi furnace does not feature a frost protection function If the heating is not used
11. al or for any other reason even If Truma knew or should have known of the possibility of such losses or damages b claims demands or actions against the customer by any person except as provided by applicable law 15 Maintenance and service Repairs must be performed by a qualified ser vice technician fruma recommends that the Truma Combi furnace be inspected annually by a qualified service technician A WARNING Danger of electrical shock fire scalding and or explosion hazard Failure to follow safety warnings exactly and Improper servicing could result in dangerous operation serious Injury death or property damage e Before servicing disconnect all electrical power to the Truma Combi furnace When servicing controls label all wires prior to disconnecting Reconnect wires correctly Turn off the LP gas supply at the tank Allow the Truma Combi furnace to cool Never actuate the pressure relief valve as long as the Truma Combi furnace is under water pressure and or still warm Verify proper operation after servicing A CAUTION Danger of injuries due to sharp edges e Always wear protective gloves to avoid injuries from sharp edges during mainte nance work There are no serviceable parts inside In case of a defect please contact the Truma Service Center at 1 855 558 7862 or one of our authorized service partners to replace the complete furnace For details see www truma net Deca
12. cian Tampering with the pressure relief valve will void the warranty The Truma Combi furnace with supplementary indirect water heating must be installed with a pressure relief valve Fig 6 that complies with the standard for Relief Valves for Hot Water systems ANSI 727 22 Fig 6 1 Relief valve 2 Test lever Putting the Truma Combi furnace into operation WARNING Danger of over temperature and toxic ex haust gases e Use with LP Gas propane only Butane or any mixtures containing more than 10 of butane shall not be used e Keep the air inlet and exhaust gas outlet free of obstructions Do not lean any ob jects against the wall cowl on the RV or place any objects within a range of 2 feet 61 cm of the wall cowl A WARNING Danger of combustion and damage to persons and the RV e Keep the area around the Truma Combi furnace free from combustible materials gasoline and other flammable vapors or liquids e Switch the gas supply and the Truma Combi furnace off If anything seems to be out of the ordinary if you smell gas If you move the RV before entering a gas station before entering a tunnel before entering a ferry boat Inspections before each use Check the Truma Combi furnace for the follow ing points before each use In case of damage contact an authorized Truma service provider and do not operate the Iruma Combi furnace e Ins
13. d 155 68 1 second 148 64 2 seconds 140 60 5 seconds 133 56 15 seconds 127 52 1 minute 124 51 3 minutes 120 48 5 minutes 100 37 safe bathing temperature Source Moritz A R Herriques F C Studies of thermal injuries the relative importance of time and surface temperature in causation of cu taneous burns A J Pathol 1947 23 695 720 e Children up to 1 years of age as well as people with physical sensory or mental disabilities and or people who are inexpe rienced or unknowledgeable may use the Truma Combi furnace only if they are super vised or have been instructed in the safe use They must also understand the risks associ ated with using It Children must not play with the Truma Combi furnace Safe operation while moving the RV e Shut OFF gas and the LP tank when moving the RV This disables all gas appliances and pilot lights Gas appliances must never be operated while vehicle is in motion e Shut OFF the Truma Combi furnace when re fueling Or pumping gas e Jo avoid damage make sure no spray water enters the Truma Combi furnace when clean ing the RV e g do not spray directly into the wall cowl Safe handling of malfunctions e Switch OFF the gas supply and the Truma Combi furnace if anything seems to be out of the ordinary e Danger of fire or explosion when attempt ing to use a flood damaged Truma Combi furnace or if the RV has been involved in an accident A q
14. e missing or unreadable please contact the Truma Service Center on 1 855 558 7862 A WARNING _ stall oute Risk of suffocation In uter tube A AVERTISSEMENT Risque d touffement Installer le tube externe FURNACE GENERATEUR WALL COWL D AIR CHAUD CHEMIN E LAT RALE RES A4 A 3 4 Nm 3 4 Nm Proper installation of both the exhaust duct and combustion air intake duct is essential For a tight connection no seal is necessary Compress approximately 1 inch at both ends of the exhaust duct before fixing Le tuyau d vacuation et le tuyau d alimen e tation en air de combustion doivent tre ic P 1 pouce au ux oxtr mit s du tuyau d vacuation avant de lo fixer A Fig 11 19 In case you encounter any problems please contact the Truma Service Center at 855 558 7862 or one of our authorized service partners For details see www truma net Please have the model number and serial number on furnace s type plate handy when you call Truma reserves the right to make technical modifications Manufacturing Sales Truma Geratetechnik GmbH amp Co KG Truma Corp VVernher von Braun Strafse 12 625 East Jackson Blvd 85640 Putzbrunn Elkhart IN 46516 Germany USA www truma com Toll Free 1 855 558 7862 Fax 1 574 538 2426 service trumacorp com www truma net 34030 54500 03 05 2015
15. e the gas shut off valve is switched on refer to Switch for gas shut off valve on page 9 Operation without gas supply is possible for the Truma Combi eco plus and the Truma Combi comfort plus The maximum heating power is then 1 700 W 5 Use the CP plus control panel to switch on the Iruma Combi furnace refer to the CP plus manual for additional instructions A WARNING Scalding injuries caused by hot water Water temperatures over 127 F 52 C can cause severe burns or scalding and in extreme cases even death e Before using a hot water faucet or using the shower mix with cold water and allow the hot water to run until the water tem perature no longer Increases e Jest the temperature of the water before placing a child in the bath or shower e Do not leave a child or an infirm person in the bath unsupervised There may be a variation between the tem perature delivered from the Truma Combi furnace and the temperature at the faucet due to water conditions or the length of pipe from the Truma Combi furnace The presence of a flow restrictor In the hot water line may limit the water flow 6 If using hot water Use the CP plus control panel to select the desired water temperature level lo obtain the desired water temperature at the faucet or in the shower mix cold and hot water Make sure that the water temperature has Stabilized before any person or animal en ters the
16. exceeded the overpressure will be relieved via the drainage socket Fig 5 a b lever in valve closed during furnace operation position lever in draining position drainage socket extends through RV s undercarriage to outside C d Opening the drain valve NOTICE Damage to the Truma Combi and the RV due to an obstructed drainage socket The drainage socket d must be unobstructed and kept clear of obstructions such as slush ice or leaves to ensure that water can drain properly No warranty claims for frost damage e Move the lever 90 degrees so that it is in the vertical position c Water will drain from the hot water container via the drainage socket d Closing the drain valve e Move the lever 90 degrees so that it is in the horizontal position a or b Pressure relief valve A WARNING Scalding injury from hot water and or tampering with the pressure relief valve e Never actuate the pressure relief valve as long as the Truma Combi furnace is still hot e Do not place a plug or reducing coupling on the outlet part of the valve If you use a discharge line allow the valve and the line to drain completely The pressure relief valve is a safety com ponent and shall not be removed for any reason other than replacement The pressure relief valve is not serviceable if defective it must be replaced Replace ment shall be performed by a certified ser vice techni
17. f diagnosis are not included in this warranty At the discre tion of Truma the replacement of the Product or parts or components thereof I may be newly manufactured ii may be assembled from new or serviceable used parts that are equivalent to new parts in performance or ill may have been previously installed The customer shall not attempt to repair the Product or resolve the problem without the prior consent of Truma Any attempt by the customer to repair the Product or resolve the problem without the prior con sent of Truma will void this warranty This limited warranty does not cover any defects attributable in whole or in part to I non Iruma products and services and or alterations of out of specification supplies Ii accidents misuse negligence or failure of the customer to follow instructions for the proper use care and cleaning of the Product ill damages caused in gas pres sure regulation systems due to foreign substanc es In the gas i e oil plasticizers Iv external factors e g fire flood severe weather v fail ure of proper transport packaging or vi failure by the purchaser to comply with Truma s installa tion and user manual regarding the Product All warranty claims must be reported to Truma s authorized warranty service center in the United States Truma Corp Service Center 825 East Jackson Blvd Elkhart IN 46516 toll free 855 558 7862 fax 574 538 2426 service t
18. hut down If the voltage drops below 10 VDC the gas sup ply is switched off Overcurrent protection If there is a short curcuit in the Truma Combi furnace gt 10 A a fuse on the control unit is activated and the Truma Combi furnace is switched off Monitoring of hot water temperature A water over temperature switch avoids exces sively high water temperatures Monitoring of hot air temperature air over temperature switch avoids excessive ly high air temperatures Operating Instructions Read and follow the Consumer Safe ty Information before operating the Truma Combi furnace NOTICE Danger of faulty operation Always use the CP plus control panel to operate the Truma Combi furnace Oper ating instructions are supplied with the CP plus control panel A WARNING Scalding injuries caused by hot water Water temperatures over 127 F 52 C can cause severe burns or scalding and in extreme cases even death Water in the hot water container can become as hot as 162 F 72 C during operation It there is a malfunction the water can reach 705 IP SIG Gh e Always use potable water to Till the hot water container he person operating the furnace is responsible for the quality of this water e Before using a hot water faucet or using the shower allow the hot water to run until the water temperature no longer increases and mix with cold water e Jest the temperature of the water before pl
19. ipheral equipment Truma Combi eco Truma Combi comfort 35 1 Ibs 15 9 kg Truma Combi eco plus 37 0 Ibs 16 8 kg Truma Combi comfort plus Truma Geratetechnik GmbH amp Co KG Iruma Truma Combi MANUFACTURER S LIMITED WARRANTY September 2014 This limited warranty pertains solely to the Truma Combi the Product manufactured by Truma and sold through its affiliates and dealers in North America ruma warrants subject to the below stated conditions that the Product will be free from defects in material and workmanship and will perform in accordance with the technical speci fications set forth in the description of the Prod uct for a period of twelve 12 months for newly manufactured parts from the original date of purchase The original purchaser is advised to register the Product within two 2 months of purchase at www truma net in order to receive an extended warranty of an additional twelve 12 months This limited warranty shall only apply if the Product was properly installed according to the Installation Instructions provid ed and in compliance with applicable codes During the warranty period Iruma will repair or replace at Its own discretion and costs the de fective Product or parts or components of such Product reported to Truma and which Truma determines was defective due to a warranty defect Costs of diagnosis for a warranty defect are borne by Truma Other costs o
20. lcifying and cleaning the water container Truma recommends decalcitying and cleaning the water container at least twice a year for hygienic reasons Only use spe cialized and suitable products Do not use chlorine based products Read and follow the instructions of the decalcifying agent s manufacturer 1 For decalcifying the water container fill the water container with citric acid and let It work for some time 2 Fill citric acid into the fresh water supply and dilute it down with fresh water according to the supplier s specification 3 Mix up over 2 64 gallons 10 liters of water to be able to Till up the water container of the Truma Combi furnace 4 Drain the mixture of citric acid and water from the water container refer to Draining the water container on page 13 and flush it with fresh water refer to Filling the water container on page 11 In order to avoid growth of micro organ isms regularly heat the water in the boiler to 158 F 70 C as follows Select energy mode LP gas on CP plus control panel Select the hot water level boost on CP plus control panel When the water temperature is reached the display does not flash anymore leave the heating switched on for another 30 minutes without withdrawing water from the system The residual heat in the device will heat the water to up to 158 F JU CI Pressure relief valve WARNING Scalding injury fr
21. mbi eco 7 500 BTU h 2 2 KW 14 300 BTU h 4 2 kW Truma Combi eco plus 5 3 oz h 150 g h 10 oz h 290 g h approx 90 approx 85 Truma Combi comfort 7 500 BTU h 2 2 kW 114 300 BTU h 4 2 KW 20 400 BTU h 6 kW Truma Combi comfort plus 5 3 oz h 150 g h 10 oz h 290 g h 14 oz h 410 g h approx 90 approx 85 approx 83 Electric mode Truma Combi eco plus Truma Combi rl ia plus 550 W 1 700 W p Mixed mode LP gas electric Truma Combi eco plus 7 500 BTU h 2 2 KW 850 W ruma Combi comfort plus 14 300 BTU h 4 2 KW 1 700 W Power supply Power consumption at 12 VDC DC lt 1 Vpp Truma Combi eco transient max 6 1 A Truma Combi eco plus average power consumption approx 1 6 Truma Combi comfort transient max 6 1 A Truma Combi comfort plus average power consumption approx 1 8 A Water heating only max 0 9 A Power consumption at 120 VAC 60 Hz mains connection or sine wave generator Operating level 1 Operating level 2 Operating level 3 Truma Combi eco plus Truma Combi nni plus ua 14 2 7 Hot Water System Capacity of water container 2 64 gallons 10 liters Water heating time from approx 23 minutes in hot water mode measured according to 59 F 15 C to 140 F 60 C EN 15033 Water inlet pressure max 40 6 psi 2 8 bar Pressure reducer available System operating pressure max 65 3 psi 4 5 bar Shipping weight without water and without per
22. ment Accessories 3 Furnace diagram 4 Consumer Safety Information Safety symbols and signal word 6 Safety behavior and practices 6 Safety features 8 Operating Instructions How the Truma Combi furnace works 8 Selectable modes of operation 9 Selectable modes of power input 00 ccc eeccececeseeceeeeeaeeeaeeenaees 9 Switch for gas shut off valve 9 Room temperature Sensor 10 Drain valve 10 Opening the drain valve curia ii aisi 10 Closing the drain valve 10 Pressure relief valve cece ceceeeeeeeeeeeeeeeneens 10 Putting the Truma Combi furnace into operation 11 Inspections before each use 11 Fin tne water COMING cirie 11 SITCHIN ON TAS URSS iii 12 SHUTCOWN illa 12 Switching off the furnace eee ccc ce cceceeeeeaeeceaeeeesneeeenes 12 Draining the water container 13 Winterizing i 13 Optional Winterizing the RV with a winterizing fluid 13 Winter operation
23. n the water system Is too high Check the pump pressure a maxi mum of 40 6 psi 2 8 bar Adjust the pump pressure If necessary Re place the water pump if an adjust ment is not possible If you want to connect your system to city water make sure that a pres sure reducer is installed to avoid fill ing the water container with a pres sure exceeding 40 6 psi 2 8 bar Water is slowly dripping from the drainage socket of the drain valve The pressure Inside the water container rises above a water pressure of approx 51 psi 3 5 bar The drain valve protects the water container of high pressure This is not a fault Water escaping at pressure relief valve Water pressure in the water system Is too high Install a pressure reducer at the fresh water supply This shall be performed only by a qualified ser vice technician Lime or dirt under the pres sure relief valve seat Rinse the pressure relief valve to re move contamination from the valve seat refer to Pressure relief valve on page 17 Replace the pressure relief valve This shall be performed only by a qualified service technician If none of the measures in the troubleshooting chart proves successful please contact your dealer the Truma Service Center at 1 855 558 7862 or one of our authorized service partners Appendix The following pictures show the labels on the Truma Combi furnace If any of the labels ar
24. om hot water and or tampering with the pressure relief valve e Never actuate the test lever as long as the Truma Combi furnace is under water pres sure and or still hot e Do not place a plug or reducing coupling on the outlet part of the valve If you use a discharge line allow the valve and the line to drain completely The pressure relief valve is a safety com ponent and shall not be removed for any reason other than replacement The pressure relief valve is not serviceable if defective it must be replaced Replace ment shall be performed by a certified ser vice technician Tampering with the pressure relief valve will void the warranty e Operate the valve manually at least once per year to ensure that waterways are clear e Before lifting the test lever Fig 7 2 make sure that the discharge line is securely at tached and properly installed to prevent in jury and property damage e f no water flows when the test lever is oper ated check the water supply he water pump must be turned on or the RV must be connected to city water e The pressure relief valve should be inspected every three years by a qualified service tech nician and be replaced if necessary Fig 7 1 Relief valve 2 Test lever Replacing the 12 volt fuse Only a qualified service technician may perform this task The fuse is on the printed circuit board under neath the connection cover e While
25. pect the furnace Fig 1 exhaust venting system Fig 1 F and wall cowl Fig 1 F for damage Verity that connec tions are tight and fasteners are secure e The wall cowl Fig 1 F for drawing in com bustion air and emitting exhaust must be free from obstructions such as slush ice or leaves The furnace will not function properly If the combustion air inlet or exhaust tube is partially or completely obstructed e he warm air outlets Fig 1 H the wall outlet vents Fig 1 I and the openings for the circulated air intake Fig 1 D and Fig 2 11 must be free from obstructions to ensure that the furnace functions properly Any obstructions might cause the furnace to overheat If this happens the built in tem perature limiter will interrupt the flow of gas to the furnace Once the furnace has cooled it will switch on again automatically e Access to adequate quantities of LP gas Fuel inlet pressure 11 13 in wc 27 4 32 4 mbar and 12 V power must be available The Truma Combi eco plus and Truma Combi comfort plus models e Make sure that the supply voltage s fuse protection of the campground suffices for operating the furnace in electric mode The furnace needs up to 1 00 W 14 2 A in op erating mode 2 If the supply voltage s fuse protection is not sufficient the furnace can be operated in operating mode 1 with up to 850 W 7 1 A NOTICE Danger of damage to the power cord
26. rical heating elements for a supply voltage of 120 V Prohibited use Any use other than the intended use see above is prohibited Examples of prohibited use e Use in a marine environment e Use as part of a space heating system e Use in mobile homes e Use in food trucks or roadside food vending vehicles e Use in construction trailers Mounting arrangement Accessories This is a typical installation for illustration The installation in your vehicle may vary The illustration is not to scale OPA EN IA IS i a Ia x LI Fig 1 Legend A Truma Combi furnace G Warm air ducts with insulation sleeve B CP plus control panel H Warm air end outlet with air throttle C Room temperature sensor Wall outlet vent D Opening for circulated air intake J Non return valve optional with mounted grid optional K Pressure reducer optional E Drain valve L Pressure relief valve F Wall cowl with exhaust venting system tube In tube Furnace diagram 1 top 2 3 _ D gt 17 16 Fig 2 9 1 top Fig 3 Key o I DI kW 10 11 12 19 14 LO 16 17 18 19 20a 20b Truma Combi furnace with supplementary indirect water heating Connection for combustion air supply tube Connection for exhaust tube Switch for gas shut off valve Connection cover Warm air outlets upper Warm air outlets lower 3 pole 120 Volt electrical plug only on Truma Combi eco plus and
27. rumacorp com www truma net The purchaser shall provide the following information regarding the potential warranty claim I serial number of the defective device il proof of purchase ill purchaser s contact information EXCEPT AS EXPRESSLY STATED AND SET FORTH HEREIN THERE ARE NO WARRANTIES ORREPRESENTATIONS EXPRESSORIMPLIED CONCERNING THE PRODUCT AND NO SUCH WARRANTIES OR REPRESENTATIONS SHALL BE IMPLIED UNDER ANY APPLICABLE LAW IN EQUITY OR OTHERWISE INCLUDING WITHOUT LIMITATION A WARRANTY OF MERCHANTABILITY A WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE OR ANY OTHER WARRANTY WHICH MAY BE IMPLIED UNDER COMMON LAW OR UNDER THE UNIFORM COMMERCIAL CODE OF ANY STATE OR OTHER JURISDICTION OF THE UNITED STATES OF AMERICA Unless further limited herein the entire liability of Iruma and the customer s exclusive remedy for damages from any cause related to or arising out of a warranty defect regardless of the form of action whether in contract or in tort will not exceed the amount of the purchase price for each purchase order for the Product which is the subject matter or directly related to the causes of action asserted Unless prohibited under applicable state law In no event will Truma its agents subcontractors affiliates suppliers and employees be liable for a any Incidental indirect soecial or conse quential damages including but not limited to loss of use revenue profits or savings substi tute rent
28. shower A WARNING Scalding injuries caused by hot air Ventilation air can reach 250 F 121 C at the warm air outlet and It can cause severe burns or scalding and In extreme cases even death e Always check the air temperature before varying the air throttle position Fig 1 H 7 If using hot air Use the CP plus control panel to set the de sired room temperature Shutdown switching off the furnace 1 Switch off the Truma Combi furnace using the CP plus control panel Due to internal processes it may take some time until the furnace is completely shut down 2 If the Truma Combi furnace and any other gas powered device Is not needed anymore turn off the LP gas supply 3 Switch off the Truma Combi furnace s elec trical power supply If you Intend to place the RV into storage or if you switch off the Truma Combi furnace during treezing temperatures refer to Winterizing on page 13 Draining the water container NOTICE Damage to the Truma Combi furnace caused by freezing e The Iruma Combi furnace does not feature a frost protection function The water contain er must be drained if the recreational vehicle RV will not be used whenever there is a risk of frost No warranty claims for frost damage To make sure that all water drains prop erly from the water container place a big enough vessel underneath the drainage socket of the drain valve gt 2 64 gallons 10 liters
29. ualified service technician must inspect the furnace In the case of moisture damage the qualified service technician must replace damaged gas controls control system parts and or electrical parts or pro vide a new furnace e Only a qualified service technician may per form repairs e Have a qualified service technician immedi ately remedy any malfunctions Remedy a malfunction only by yourself if a remedy is specified in the troubleshooting chart in these operating instructions refer to Troubleshooting on page 18 e After any misfire a qualified service techni cian must Inspect the Truma Combi furnace and the exhaust tube Safe maintenance and repair e Only a qualified service technician may clean and maintain the furnace e Any alteration to the Truma Combi furnace or its controls can cause unforeseen serious hazards and will void the warranty e After a long period of winterizing Flush all hot cold water hoses and the Truma Combi furnace thoroughly with drinking water be fore using It Safety features The Truma Combi furnace is equipped with the following safety devices Switch for gas shut off valve The switch Fig 2 4 shuts off the power to the safety gas valve and the gas supply to the furnace If you want to make sure that the gas supply to the furnace Is off turn the switch to the OFF position Flame monitoring It the flame goes out the gas supply is switched off Low voltage s
30. uidelines 3 Flush the water system with a suitable win terizing fluid according to the supplier s or RV manufacturer s guidelines Before using the Iruma Combi furnace again in hot water mode remove the win terizing fluid and flush the water system with potable water Winter operation To operate the Truma Combi furnace in poten tially freezing conditions the following require ments must be ensured e There must be sufficient LP gas propane fuel inlet pressure 11 13 in we 27 4 32 4 mbar in the tank e n addition the Truma Combi eco plus and the Iruma Combi comfort plus models re quire a supply voltage of 120 V if they are to be operated In electric or mixed mode e For hot water operation the water container must be filled refer to Filling the water container on page 11 You must leave the furnace powered ON whenever freezing might occur Winter operation will not protect the RV s entire plumbing system The RV must be designed for freezing conditions Truma Combi Technical Data Fuel LP gas propane only Inlet pressure 11 13 In we 27 4 32 4 mbar Manifold pressure 10 in wc 24 9 mbar Duct static pressure minimum of 0 00 in wc 0 0 mbar maximum of 0 65 in wc 1 6 mbar Temperature rise lt 150 F 83 C Energy Input Rate Gas Consumption Thermal Efficiency LP gas mode Operating level 1 Operating level 2 Operating level 3 ruma Co
31. wered by electricity if the RV Is connected to a mains power supply or a generator NOTICE Only a 120 V sine wave gener ator shall be used to avoid damage to the Truma Combi 3 LP gas and electricity mixed mode The Truma Combi eco plus and Combi comfort plus furnaces run simultaneously on LP gas propane and electricity Mixed mode is avall able in heating mode only Switch for gas shut off valve The switch Fig 4 shuts off the power to the safety gas shut off valve and with this the gas supply to the Truma Combi furnace To make sure that the gas supply to the furnace Is off turn the switch to the OFF position Switch lt gt for gas shut off valve Gas shut off valve Fig 4 Switch positions of the switch for gas shut off valve Off gas shut off valve is closed On gas shut off valve is open Room temperature sensor room temperature sensor Fig 1 C mea sures the temperature Inside the RV The installation location for the room tempera ture sensor depends on the RV and will be cho sen by the RV manufacturer Drain valve A WARNING Scalding injury from hot water and or tampering with the drain valve e Never actuate the drain valve as long as the Truma Combi furnace ts still hot With the drain valve Fig 5 the water container can be emptied Additionally the water con tainer is protected from overpressure If a pres sure of approx 51 psi 3 5 bar is
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