Recreational Vehicles Rev2.cdr
Contents
1. EAVAYAA group Advanced Solutions for Gas Control Recreational Welnic re A 4 Gas pressure Regulators amp Accessories MANERA DIVISION Recreational vehicles Product index 1 Introduction 0000 P 4 1 1 e Pressure Gas Regulators P 4 1 2 Installations P 4 1 3 Backflow check valve safety device P 5 P 6 P 7 4 1 Start up and usage P 8 4 2 e Advantages of the automatic changeover Type 924 NRY P 8 5 Gas Accessories 07 P 10 9 1 Vent cover Type 21 P 10 5 2 e Flexible hose Type 501 LP P 10 5 3 Flexible hose Type 501 HP P 10 5 4 e T Check Type 413 P 10 5 5 e Mounting brackets Type 171 P 10 O EAVAHNA ol OVA MUITO DIVISION DIVISION Recreational vehicles 1 1 Pres Two stage gas regulators are designed and manufactured in accordance to UL 144 requirements NFPA 1192 paragraph 5 2 15 2 Regulators are used with propane gas appliances functioning at 11inch WC pressure Gas pressure regulators used in recreational vehicle RV installations have two integrated stages of regulation with intermediate pressure of 10 PSI NFPA 1192 paragraph 5 2 15 1 Depending on the kind of installation these regulators are used for they can supply gas for a range of calorific power from 100 000 to 160 000 BTU See technical description of gas appliances The second stage of the regulatoris equipped witha safety valve Type 1 as per UL 144 WARNING The regula2. Inlet connection 1 4 female NPT or inverted flare Outlet connection 3 8 NPT Guaranteed Flow 160000 BTU h Setting Point 11 WC 1 at 70000 BTU Inversion Pressure 5 PSI 0 35 bar Adjustable outlet pressure from 0 5 WC to 1 5 WC Paint metallic grey Cover and body Zamak Alloy 13 EN 1774 Working temperature range 4 F 22 F 20 C 50 C Depending on the type of installation the basic model a eee eii ds can be equipped either with a mounting bracket for iii li inci wall installation type A at page 5 or with a mounting 148 HA bracketfor coverinstallation type C atpage 5 x AS e WARNING User manual is obligatory in case the regulator is directly sold to end user The RV OEM must integrate their technical documentation with the provided instruction sheet The automatic changeover Type 924 NRV is connected to the RV through a flexible hose 501 LP Type See Accessories at page 10 le a a hn Q in BTU h EAVAHNA ol OVA MUITO DIVISION 7 Recreational vehicles Bracket with protective cover installation Wall mounted IIA 4 1 Start up andlusage How to turn iton Make sure that the Automatic Changeover is connected to the two tank valves with high pressure gas hose Make sure that the automatic changeover is mounted above the two tank valves Open the two tank valves at the same time This is fundamental
3. bar This means that the inner pressure of the service gas cylinder must flow below 5 PSI to make the changeover begin to extract gas from the reserve bottle At this pressure value we know in fact that a propane gas bottle can be considered empty whichever capacity or temperature functioning conditions the appliance is designed for Remote sound signal optional only All 924 NRV type changeovers are equipped with a magnetic component placed below the hand wheel Thanks to this an optional electronic sound device can be mounted on the hand wheel allowing the end user to hear the sound when the installation is running with the reserve gas tank Thus the end user knows he she has to replace the empty gas tank at the earliest For more information please call the nearest RV dealer EAVAHNA g OVA WKTU TATO DIVISION DIVISION Recreational vehicles 5 1 Vent cover Type 211 Model 211 184 Protection cover Model 211 161 Protection cover Model 211 086 Complete on the second stage of two stage for vent hole on the second stages protection cover for Two Stage 424 NRV regulator of two stage 424NRV and ASME Type 524 AS Automatic Changeover 924NRV regulators lt SSS AS 6 y ANS 1 4 Inverted Flare Type 1 ACME Nut 3 8 MNPT 1 2 SAE Flare Model 501 007 lost dl ne 3 8 1 D hose 3 8 MNPTx 1 2 SAE Flare 1 4 1 D hose Type 1 ACME
4. pipes must be calculated to ensure that supplying pressure is sufficient to run the gas appliancesatthesame time Allofthe above mentioned gas appliances mustrunatthe same time without any failure EAVAHNA ol OVA MUITO DIVISION Recreational vehicles Gascylinderandregulatorshallbe protected by ashelter orin a cylindrical cage see following diagram as per NFPA 1192 pardagrapaso 2 10 69 2 10 02 153 stallation gt 524NRV gt WARNING RV gas piping system must be tested for leakage prior to delivering vehicle to dealer network Therefore setting pressure test and leakage test have be done by authorized RV OEM In case of any detected anomalies the gas regulator kit is not likely to be responsible because the gasregulators are 100 tested while manufacturing er Installation 924NRV or 424NRV Inlet 413 In accordance withrequirements of NFPA 1192 paragraph 5 2 16 3 itis compulsory to havea backflow check device for double cylinderinstallations For Two stage group of regulation The device consists of a T fitting that prevents gas from flowing in case one of the inlets of the regulator kit is not connected to one ofthe cylinders WARNING Ifasimple T fitting is used itis obligatory to use flexible hoses equipped with backflow check device For automatic changeover The Backflow Check device can be integrated into the automatic changeover to p
5. to allow the automatic changeover to ensure the continuous functioning of the gas installation in case one of the two cylinder tanks goes empty The automatic changeover cannot namely pass to the reserve gas tank if the tank valve Is closed Figure 1 How toread the automatic changeover indicator full gas tank When both gas tanks are full the changeover indicator becomes green provided that both tanks A and BL o y Service Reserve valves are turned on The arrow on the hand wheel indicates which of the two bottles is used first this becomes the service bottle The other gas cylinder is called reserve bottle See picture 1 How to read the automatic changeover indicator empty gas tank When the service bottle exhausts the automatic changeover gets the sense negative pressure gas bottle pressure less than 5 PSI And automatically switches to the reserve bottle to supply the gas installation OD as normal The end user will knows that the service bottle is now empty understands such operation because r the green because indicator turns red See picture 2 Fr How to substitute the empty gas tank with the full one Turn the tank valve A off and rotate the automatic changeover hand wheel 180 picture 3a If the reserve Service__ Reserve gas tank is full the indicator will turn green picture 3b ne 3a Figure 3b y Figure 3c a7 Figure ia Remove the empty gas tank picture 3c O TEN Y y Install a fu
6. 8 NPT do _ Test Point 1 8 NPT o Guaranteed Flow 103000 BTU h la SettingPoint 11 WC 1 at 60000 BTU 0 ENE eee Adjustable outlet pressure from 1WCto 2WC i Era 77 7 Paint metallic grey Coverand body Zamak Alloy 13EN 1774 Type Bracket Model 1 Wall Model id 2 Model L Howto order 424 NRV TYPE Please combine the codes from the above grid together as follows A24NRV Type bracket model E g EAVAHNA g OVA WKI ETATO DIVISION Recreational vehicles 524AS Type Technical features Inletconnection POL 880 Outletconnection 3 8 NPT TestPoint 1 8 NPT Guaranteed Flow 103000 BTU h Setting Point 11 WC 1 at 70000 BTU Adjustable outlet pressure from 0 5WC to 1 5WC Paint metallic grey Coverandbody Zamak Alloy 13EN 1774 524AS ULI144 First stage setting 0 3 bar Setting point 11 w c 60 000 BTU The Two Stage Type 524 AS regulator is mounted directly to tank connected to the tank valve of ASME container type It is connected at its outlet to the installation gas pipe net The regulator inlet POL coupling is equipped with an excess flow valve device WARNING The regulator must be mounted with vent holes pointing downward The cover 211 086 see page 10 is normally mounted as protection for the regulator See type C so w a a a a a er installation Sinin ee Pout in w c Technical features
7. Nutx 1 4 Inverted Flare 1 4 MNPT Type 1 ACME Nut Model 501 006 1 4 1 D hose Type 1 ACME Nutx 1 4 MNPT Model 413 007 To be used in double cylinder installations mounted at the inlet of Two Stage 424NRV Ininstallations equipped with T Checkstandard flexible hoses can be used Model 171 059 Wall installation Model 171 061 Wall installation Model 171 067 Cover installation manifold designed for changeover manifold for twin regulator Type 424 manifold for both twin regulator Type 942 NRV only NRV only Type 942 NRV and changeover Type A24NRV 10 a EAVAHNA ol OVA MUITO DIVISION Manufacturing Facilities is Eavinmnatie EoORii Kosan INTERNATIONAL EAVAHNA Grove Advanced Solutions for Gas Control cavagna group sudamericana lida Kosangas III Zhongshan cavagna Recreational Vehicles Rev 2 Mar 12 Cavagna North America Inc 50 Napoleon Court Somerset NJ 08873 USA Tel 732 469 2100 Fax 731 469 3344 email nfo cavagna com www cavagnagroup com
8. ll gas bottle and make sure to connect the A same to the automatic changeover Then turn on the A a cylinder valve A picture 3d Service Reserve Empty Service Empty Service Reserve Service matic changeover Type 924 NRV ek Figure 2 Easy to read changeover indicator The indicator displays the two different ways of functioning Service Reserve by changing colour Reading the indicator colour is fundamental for the user because he is able to know when to proceed to replace the empty gas tank with the reserve gas tank The indicator is designed to guarantee the best reading as possible Far away Visibility ae Frontal visibility Lateral visibility 1 Integrated Back flow check device As the back flow check device is integrated in the automatic changeover 924 NRV Type the user can apply gas high pressure hoses which are not equipped with their own back flow check device This always provides safety installation even if the userreplaces gas rubber hoses Automatic changeover inversion pressure value The automatic changeover has to let the service cylinder get exhausted before inverting to the reserve gas tank The automatic changeover performs even better at low pressure Infact the automatic changeover Type 924 NRV Is designed to work with a pressure of inversion at 5 PSI 0 35
9. revent gas from flowing in case one ofitsinletsisnot connected tothe cylinder WARNING If the automatic changeover is not equipped with backflow check device it is obligatory that the backflow check device be provided with flexible hoses EAVAHNA QroUP Mer ern eee DIVISION Recreational vehicles Depending on the type of installation the basic model can be equipped either with a mounting bracket for wall installation type A on page 5 or with a mounting bracket for cover installation type C on page 5 In general plastic protection is necessary in first and second stage of regulator for all types of installations In double cylinder installations it is necessary to couple the T inlet of the backflow check device See Accessories at page 10 WARNING User manual is obligatory in case the regulator is directly sold to end user RV OEM must integrate their technical documentation with the provided instruction sheet The Two Stage regulator Type 424 NRV is connected to the RV through a flexible hose 501 LP Type See Accessories at page 10 Cover installation Y so ga b AAA Wall installation ur _ 424NRV Two Stage UL144 First stage setting 0 3 bar Setting point 11 w c 60 000 BTU Technical features s Inlet connection 1 4NPT 3 Outlet connection 3
10. tor most be installed with vent hole pointing downwards to allow water to exit See NFPA 1192 paragraph 5 2 15 4 WARNING 100 inspection at Re Ca Italy manufacturing unit of the whole range of regulators is undertaken during manufacturing process as far as setting pressure see setting point at page 6and 7 of the present catalogue leakage test at the inlet high pressure value to be used and leakage test at the outlet low and high pressure value to be used 1 2 Installations RV installations canbe made onthe basis of the following general diagram UL 2061 Furnace Water Heater Refrigerator UL 144 30000 BTU 12000 BTU 1500 BTU A A E X i X al Range Outside grill Twin Type 424NRV Inversor Type 924NRV 23000 BTU 10000 BTU RV installations are supplied by single or double cylinder systems or by ASME tanks The integrated second stage regulator is connected to cylinders through flexible high pressure gas rubber hoses equipped with fittings in accordance to UL 2061 NFPA 1192 paragraph 5 2 16 4 Installations of integrated double stage regulators have to be in accordance with requirements expressed in NFPA 1192 paragraph 5 2 15 Installations generally supply the following gas appliances Furnace 30000 BTU Range 29000 BTU WaterHeater 12000BTU Refrigerator 1500BTU Outside grill 10000 BTU Total 81000 BTU WARNING Inside diameter and length of
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