DHC-E 20, 30 Tankless Electric Water Heater Installation Manual
Contents
1. oFF orr orr orr OFF _ on on 8794 01 THIS MANUAL MUST BE READ CAREFULLY BEFORE ATTEMPTING TO INSTALL THE DHC E WATER HEATER IF YOU DO NOT FOLLOW THE SAFETY RULES OR THE INSTRUCTIONS OUTLINED IN THIS MANUAL THEUNIT MAY NOT OPERATE PROPERLY AND IT COULD CAUSE PROPERTY DAMAGE SERIOUS BODILY INJURY AND OR DEATH STIEBEL ELTRON INC WILL NOT BE LIABLE FOR ANY DAMAGES BECAUSE OF FAILURE TO COMPLY WITH THE INSTALLATION AND OPERATING INSTRUCTIONS OUTLINED IN THIS MANUAL OR BECAUSE OF IMPROPER USE IMPROPER USE INCLUDES THE USE OF THIS APPLIANCE TO HEAT ANY LIQUID OTHER THAN WATER FAILURE TO COMPLY WITH THE INSTALLATION AND OPERATING INSTRUCTIONS OR IMPROPER USE VOIDS WARRANTY NEVER REMOVE THE UNIT S COVER UNLESS THE ELECTRICITY IS TURNED OFF IF YOU HAVE ANY QUESTIONS REGARDING THE INSTALLATION OR OPERATION OF THIS WATER HEATER OR IF YOU NEED AN ADDITIONAL INSTALLATION MANUALS PLEASE CALL OUR TECHNICAL SERVICE LINE AT 800 582 8423 USA AND CANADA ONLY IF YOU ARE CALLING FROM OUTSIDE THE U S OR CANADA PLEASE CALL USA 413 538 7850 AND WE WILL REFER YOU TO A QUALIFIED STIEBEL ELTRON SERVICE REPRESENTATIVE IN YOUR AREA Legend to figures emperature adjustment knob Temperature display Power light Hot water connection C2. B 21 552 45 116 gt x Y ga EH 45 48 400 270 65 34 LE l 3 4 4 102 _ prm 122 310 10 inch mm 8786 01 pouse mm 13 sf oO 12 11 5 14 13 8787 01 12 320 19 500 19 2 490 8790 01 inch mm 1 pouse mm CKT 1 CKT 2 DHC E 30 T i CKT 2 CKT 3 3 7 8 inch 100 mm CKT 1 3 7 3 pouse 100 mm 8791 01 DHC E 20 OFF OFF DHC E 30 220 240 208 AC
3. 21 6 8 59 10 31 12 37 15 47 20 62 220 240V 288 11 46 13 75 16 50 20 62 113 F Warm water outlet temperature Warm water flow rate GPM 113 F Temperatura del aqua caliente Flujo de aqua caliente GPM Type Tipo kw Cold water inlet temperature aqua fr a temperatura de entrada 39 F 50 F 59 F 68 F 77 F 86 F 95 F 104 F DHC E 20 208 V 14 4 1 33 1 56 1 82 2 18 2 72 3 63 5 45 220 240 19 2 1 77 2 08 2 42 2 91 3 63 4 84 DHC E 30 208 V 21 6 1 99 2 33 2 72 3 27 4 09 5 45 220 240V 288 2 66 3 11 3 63 4 36 5 45 45 C Warm water outlet temperature Warm water flow rate l min 45 C Temperatura del aqua caliente Flujo de aqua caliente l min Type Tipo kW Cold water inlet temperature aqua fr a temperatura de entrada 49 10 C 15 20 25 30 C 35 40 20 208 14 4 5 03 5 89 6 87 8 25 10 31 13 75 20 62 220 240 192 6 71 7 86 9 16 11 00 13 75 18 33 DHC E 30 208 V 21 6 7 54 8 84 10 31 12 37 15 47 20 62 220 240 V 28 8 10 06 11 78 13 75 16 50 20 62 125 6 F Warm water outlet temperature Warm water flow rate GPM 125 6 F Temperatura del aqua caliente Flujo de aqua caliente GPM Type Tipo Cold water inlet temperature
4. 800 582 8423 USA and Canada For service outside the U S and Canada please call us at USA 413 538 7850 You can also e mail us at info stiebel eltron usa com or fax us at USA 413 538 8555 One DHC E can be used for the following applications Typical residential installation Typical commercial installation Mounting the unit UNIT MUST BE INSTALLED INA VERTICAL POSITION WITH THE WATER FITTINGS POINTING DOWN WARD DO NOT INSTALL UNIT WHERE IT WOULD ROUTINELY BE SPLASHED WITH WATER ELECTRIC SHOCK MAY RESULT 1 Install DHC E as close as possible to the main hot water draw off points 2 Install DHC E in a frost free area If frost may occur remove unit before freezing emperatures set in 3 Leave a minimum of 5 of clearance on all sides for servicing 4 Remove the cover D 5 Mount unit securely to wall by putting four screws through mounting holes E Screws and plastic wall anchors for mounting on masonry or wood are provided Water connections 1 All plumbing work must comply with na tional and applicable state and local plumbing codes 2 A pressure reducing valve must be installed if the cold water supply pressure exceeds 150 PSI 10 bar 3 Make certain that the cold water supply line has been flushed to remove any scale and dirt 4 An isolating valve is an integral part of the cold water inlet This valve allow
5. PARTS SERVICEABLE BY THE LAY PERSON IN CASE OF MALFUNCTION PLEASE CONTACT A LICENSED PLUMBER OR ELECTRICIAN Suitable for supply with water up to 107 6 F 42 C Tankless water heaters are considered a non continuous load Conductors should be sized to maintain a voltage drop of less than 3 under load cL Model DHC E 20 DHC E 30 Phase 1 1 Voltage V 208 220 240 208 220 240 Wattage 14 4 19 2 21 6 28 8 ax amp load 70 80 105 120 in required circuit breaker size 2x40 2x50 3x40 3x50 Required wire size AWG COPPER 8 8 8 8 in water flow activate unit GPM l min 058 22 0 87 3 3 Pressure loss in unit PSI bar 1 45 0 1 1 45 0 1 ominal water volume GAL 0 26 1 0 0 39 1 5 Working pressure max PSI bar 150 10 Tested to pressure PSI bar 300 20 Weight bs kg 21 9 5 24 25 11 Water connections NPT 3 4 English Troubleshooting Symptom Possible Cause Solution No hot water circuit breakers off turn circuit breakers on safety thermal cut out tripped reset thermal cut out not enough flow rate to activate unit dean filter screen at unit clean faucet aerator or shower head Water not hot enough water flow rate too high reduce water flow rate until light on front cover stops blinking voltage too low supply correct voltage to unit LED displays one of the follo
6. aqua fr a temperatura de entrada 39 F 50 F 59 F 68 F 77 F 86 F 95 F 104 F DHC E 20 208 V 14 4 1 14 1 30 1 47 1 70 2 02 2 48 3 20 4 54 220 240 19 2 1 51 1 73 1 96 2 27 2 69 3 30 4 27 6 05 DHC E 30 208 V 21 6 1 70 1 95 2 21 2 55 3 03 3 71 4 81 220 240 V 288 2 27 2 59 2 94 3 41 4 04 4 95 6 41 52 C Warm water outlet temperature Warm water flow rate l min 52 C Temperatura del aqua caliente Flujo de aqua caliente l min Type Tipo kw Cold water inlet temperature aqua fr a temperatura de entrada 4 C 110 C 15 20 25 C 30 C 35 40 DHC E 20 208 V 144 4 30 4 91 5 57 6 44 7 64 9 37 12 13 17 18 220 240 192 5 73 6 55 7 43 8 59 10 18 12 50 16 17 22 91 DHC E 30 208 V 21 6 6 44 7 36 8 36 9 67 11 46 14 06 18 19 220 240 28 8 8 59 9 82 11 15 12 89 15 27 18 75 24 26 Table 1 I DHC E 20 DHC E 30
7. RON INC WILL BE RESPONSIBLE FOR REPLACEMENT OF THE DETECTIVE PART S ONLY STIEBEL ELTRON INC IS NOT RESPONSIBLE FOR LABOR CHARGESTO REMOVEAND OR SHOULD THE OWNERWISH TO RETURN THETANKLESS ELECTRIC WATER HEATER FOR REPAIR THE OWNER MUST FIRST SECURE WRITTEN AUTHORIZATION FROM STIEBEL ELTRON INC THE OWNER SHALL BE REQUIRED TO SHOW PROOF OF PURCHASE DATE AND TO PAY ALL TRANSPORTATION COSTS TO RETURN THE DEFECTIVE PART S OR TANKLESS ELECTRIC WATER HEATER FOR REPAIR OR REPLACEMENT WARRANTY IS VOID IF WATER STIEBEL ELTRON INC 242 Suffolk Street Holyoke MA 01040 PHONE 800 582 8423 or 413 538 7850 FAX 413 538 8555 E Mail info stiebel eltron usa com www stiebel eltron usa com 248510 33226 1 7771 These instructions are subject to alteration notice Estas instrucciones est n sujetas a correcciones
8. STIEBEL ELTRON DHC E 20 DHC E 30 English DHC E TANKLESS ELECTRIC WATER HEATERS INSTALLATION INSTRUCTIONS FORTHE LICENSED PLUMBER AND ELECTRICIAN English Table of contents above Temperature increase ab ambient Putting the water heater into operation Normal maintenance OS OS OS 8784 01 English Maximum temperature increase above ambient water temperature Espa ol Aumento m ximo de temperatura del aqua fr a entrante 105 F Warm water outlet temperature Warm water flow rate GPM 105 F Temperatura del aqua caliente Flujo de aqua caliente GPM Type Tipo kW Cold water inlet temperature aqua fr a temperatura de entrada 39 F 50 F 599 68 F 77 F 86 F 95 F 104 F DHC E 20 208 V 14 4 1 51 182 2 18 2 72 3 63 5 45 220 240 192 2 02 2 42 2 91 3 63 4 84 DHC E 30 208 V 21 6 2 27 2 72 3 27 4 09 5 45 220 240 28 8 3 03 3 63 4 36 5 45 40 C Warm water outlet temperature Warm water flow rate l min 40 C Temperatura del aqua caliente Flujo de aqua caliente l min Type Tipo kW Cold water inlet temperature aqua fria temperatura de entrada 45C 20 C 30 C C DHC E 20 208 V 144 5 73 6 87 8 25 10 31 13 75 20 62 220 240 V 19 2 7 64 9 16 11 00 13 75 18 33 DHC E 30 208 V
9. ld be connected to properly grounded dedicated branch circuits of proper voltage rating Ground must be brought to the Ground at the circuit breaker panel The DHC E 20 and DHC E 30 must have multiple power sources G A DHC E 20 requires two independant circuits Use two AGW 8 supply cables protected by two seperate double pole 50 Amp breakers see A DHC E 30 requires three independant circuits Use three AGW 8 supply cables protected by three seperate double pole 50 Amp breakers In both cases make sure that the unit is properly grounded see Please refer to the technical data table for the correct wire and circuit breaker size Technical Data 3 The wire must be fed through the knock outs located between the hot and cold water connections F The live wires must be connected to the slots on the ter minal block marked L and L The ground wire must be connected to slot marked with the ground symbol 4 Reinstall the cover with screws WARNING AS WITH ANY ELECTRIC APPLIANCE FAILURE TO ELECTRICALLY GROUND UNIT MAY RESULT IN SERIOUS INJURY OR DEATH Putting the water heater into operation WARNING OPEN HOT WATER FAUCET FOR A FEW MINUTES UNTIL WATER FLOW IS CONTINUOUS AND ALL AIR IS PURGED FROM WATER PIPES THE UNIT S COVER MUST BE INSTALLED BEFORE THE CIRCUIT BREAKERS ARE TURNED ON 1 Turn on circuit breakers to bring electrical power to the unit 2 Adju
10. old water connection Wiring bloc Electronic control unit Safety thermal cut ou eating system 10 Knock outs for wires 11 Water supply line for faucet installation 12 Sink 13 Cold valve right 14 Hot valve left 15 Screws and plastic wall anchors General The DHC E 20 and DHC E 30 are designed o supply hot water for a house or apartment Unlike a conventional storage ype water heater the DHC E tankless water heater does not store hot water Instead water is heated instantaneously as it flows hrough the unit Due to the absence of stand by losses the DHC E offers greater energy efficiency than storage type water heaters The input of heat into the water is controlled electronically The DHC E will deliver any water temperature between 86 F 30 C and 125 F 52 C Please set the desired temperature using the knob on the front cover The LED displays the temperature that the unit will produce in C Please use the conversion table on the unit in order to obtain degree Fahrenheit The maximum temperature is electronically limited to 125 F 52 n case the Power light is flashing while the unit operates the water flow rate exceeds he heating capacity of the unit Reduce the hot water flow rate in order to let the unit achieve the set point temperature n case you have questions regarding the way you plan to use the DHC E please call our echnical service line at
11. s the unit to be isolated for maintenance purposes 5 The cold water connection inlet is on the right side of the unit and the hot water connection outlet is on the left side of the unit NOTE EXCESSIVE HEAT FROM SOLDERING ON COPPER PIPES NEAR THE DHC E MAY CAUSE DAMAGE 6 Tankless water heaters such as the DHC E are not required to be equipped with a Pressure and Temperature Relief Valve P amp T If the local inspector will not pass the installation without a P amp T it should be installed on the hot water outlet side of the unit 7 The DHC E is designed for connection to copper tubing PEX tubing or a braided stainless steel hose with a 3 4 NPT female tapered thread If soldering near the unit is necessary please direct the flame away from the housing of the unit in order to avoid damage 8 When all plumbing work is completed check for leaks and take corrective action before proceeding Electrical connection WARNING BEFORE BEGINNING ANY WORK ON THE ELECTRIC INSTALLATION BE SURE THAT MAIN BREAKER PANEL SWITCHES ARE TO AVOID ANY DANGER OF ELECTRIC SHOCK ALL MOUNTING AND PLUMBING MUST BE COMPLETED BEFORE PROCEEDING WITH ELECTRICAL HOOK UP WHERE REQUIRED BY LOCAL STATE OR NATIONAL ELECTRICAL CODES THE CIRCUITS SHOULD BE EQUIPPED WITH A GROUND FAULT INTERRUPTER 1 All electrical work must comply with natio nal and applicable state and local electrical codes 2 The DHC E shou
12. st the water temperature to the desired level using the knob on the front cover of the unit The DHC E displays the temperature in degree Celsius There is a conversion table on the front cover that helps to convert from degree Celsius to degree Fahrenheit 3 Turn on hot water and wait twenty seconds until temperature has stabilized 4 Check the water temperature with your hand and make sure that it does not feel too hot Reduce if necessary STIEBEL ELTRON 5 Explain to the user how the unit works and familiarise him or her with its use Advise the user about possible hazards hot water temperature up to 125 F 52 Hand over these instructions to be kept for future reference Normal maintenance STIEBEL ELTRON DHC E tankless water heaters are designed for a very long service life Actual life expectancy will vary with water quality and use The unit itself does not require any regular maintenance However to ensure consistent water flow it is recommended to periodically remove scale and dirt that may build up at the aerator of the faucet or in the shower head Also the DHC E has a built in filter screen that should be cleaned from time to time In order to do this turn off the cold water supply at the isolating valve and remove the cap of the filter screen Clean screen and put the screen and cap back into their original position OTHER THAN THE FILTER SCREEN THE DHC E DOES NOT CONTAIN ANY
13. wing fault codes problem with electronic control module contact STIEBEL ELTRON 91 92 93 94 95 96 97 If you are not able to resolve a problem please contact us toll free at 800 582 8423 before removing the unit from the wall STIEBEL ELTRON is happy to provide technical assistance In most instances we can resolve the problem over the phone Spare parts H No Spare part Model DHC E 20 DHC E 30 1 Hea ing system 24 91 58 ronic control device Master 24 93 18 3 ronic control device Slave 24 93 19 2 Safe y thermal cut out 17 03 05 5 Flow sensor 24 91 59 6 Cold water connection 24 91 67 7 Warm water connection 24 91 68 8 Tem perature adjustment knob 16 35 73 WARRANTY DEFECTIVE PART S ORANY INCIDENTIAL OR CONSEQUENTIAL EXPENSES HEATER HAS BEEN INSTALLED OR USED IMPROPERLY OR IF DESIGN HAS BEEN ALTERED IN ANY WAY STIEBEL ELTRON INC 242 Suffolk Street Holyoke MA 01040 PHONE 800 582 8423 or 413 538 7850 FAX 413 538 8555 E Mail info stiebel eltron usa com www stiebel eltron usa com RESIDENTIAL amp COMMERCIAL WARRANTY STIEBEL ELTRON WARRANTS TO THE ORIGINAL OWNER THAT THE DHC ETANKLESS ELECTRIC WATER HEATER WILL BE FREE FROM DEFECTS IN WORKMANSHIP AND MATERIALS FOR A PERIOD OF THREE YEARS FROMTHE DATE OF PURCHASE SHOULD THE PART S PROVETO BE DEFECTIVE UNDER NORMAL USE DURING THIS PERIOD STIEBEL ELT
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