Instruction/ maintenance manual of the product GWH 425 PN/HN4GWH 4254 Bosch Appliances
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Applications manual F or tankless and point of use wat er heat ers.
2 | Applications manual Application manual | 11.2007 Bosch Wat er Heating T able of Contents 1 Introduction 3 2 Bosch Wat er Heating Models 3 2.1 Sizing tankless water heaters 4 2.2 Bosch GWH 715 ES 6 2.3 Bosch GWH C 800 ES 7 2.4 Outdoor Installation for G WH 715 ES and GWH C 800 ES 8 2.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 3 1 Introduction The Bosch Applications Manual is int ended to present some of t he most common applications of the Bosch line of tankless and point of use wat er heaters.
4 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 2.1 Sizing tankless water heaters De fi nitions Major applications (2 GPM or mor e): Washing machine, bath tub, shower nozzle Minor applications(1.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 5 0 1 2 3 4 5 6 7 8 GWH 425 PN/HN 4 GWH 425 4 GWH 260 PN/HN 2 10 20 30 40 50 60 70 80 90 Degree rise (°F) GPM G as App l iance Sizing C h ar t GWH 715 ES 7 GWH C 800 ES C GWH C 8 C 0 .
6 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 2.2 Bosch GWH 715 ES F eatures: Electronic ignition and built in pow er vent 82% thermal ef fi ciency Vents v er .
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 7 2.3 Bosch GWH C 800 ES F eatures: Electronic ignition and built in pow er vent Condensing tec hnology with 92% thermal ef fi ciency Vents v er tically or horizontally with 3" or 4" PVC, CPV C or ABS (Schedule 40) vent pipe.
8 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 2.4 Outdoor Installation for G WH 715 ES, and GWH C 800 ES Outdoor Kit (PTOK) installation: The installation of this outdo.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 9 2.6 Bosch GWH 345 ESR F eatures: Speci fi cally designed for recir culating applications Electronic ignition and bui.
10 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 2.6 Bosch GWH 450 ESR F eatures: Speci fi cally designed for recir culating applications Electronic ignition and bui.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 11 2.7 Bosch GWH 425 EF F eatures: Electronic ignition and built in pow er vent Thermal ef fi ciency of 82% Vents .
12 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 2.8 Bosch GWH 425 HN F eatures: Hydro-generat ed ignition 80% thermal ef fi ciency Endless hot wat er for one ma.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 13 2.9 Bosch GWH 425 PN F eatures: Standing pilot ignition 78% thermal ef fi ciency Endless hot wat er for one maj.
14 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 2.10 Bosch GWH 260 PN F eatures: Standing pilot ignition 78% thermal ef fi ciency Mounts on wall for easy instal.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 15 2.11 Po werstream Pro RP17PT , RP27PT F eatures: Over 90% ef fi ciency rating 10-year warranty on heat ex changer .
16 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 2.12 Po werstream P r o RP1P , RP2P , RP3P , RP7P , RP9P ,RP12PT F eatures: 5-year warranty on heat ex changer Saves .
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 17 2.13 Ariston Pro GL2.5Ti, GL4Ti, GL8Ti F eatures: Point of use mini tank 3 models Adjustable thermostat with the.
18 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 3 Domestic Wat er Heating Applications Potable wat er Potable w ater is wat er that is suitable f or drinking. Bosch Wat er Heating appliances are appro ved to heat po table water onl y.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 19 3.1.1 Ariston mini tank Simply tap int o the cold wat er line and install the water heat er directly at the sink. All models plug int o a standard 120 volt outle t. Heater can be w all mounted, or sit on the fl oor .
20 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 3.1.2 Pow erstream Pro electric point-of-use tankless water heat er Pow erstreamPr o point-of-use water heat ers come in four models t o ser ve a wide range of applications. Finding the right model depends upon your desired t emperature and fl ow rate.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 21 3.1.3 Bosch GWH-260PN gas tankless water heat er The Bosch GWH-260PN gas tankless wat er heater offers a compact and lightweight design f or easy installation. This unit is equipped with standing pilot ignition and is intended f or low volume applications.
22 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 3.2 Whole house applications Whole house applications cover the typical home applications up t o a 2 or 3 bedroom house. See the sizing guide (Section 2.1) t o det ermine the best Bosch wat er heater model f or your application.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 23 3.2.2 Pow erstream Pro whole house application with domestic recirculation loop The circulat or should be controlled by an e xternal aquastat, or with a timer to run only during times of e xpected ho t water usage.
24 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 3.2.3 Bosch Pro T ankless gas water heater Below are tw o exam ples of Bosch Pro T ankless gas water heater installations for the whole house. One e xample sho ws an Arist on mini tank in line for r educed hot wat er wait time and increased tem perature stability .
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 25 3.2.4 Bosch Pro T ankless gas water heater with domestic recirculation loop The circulat or should be controlled by an e xternal aquastat, or with a timer to run only during times of e xpected ho t water usage.
26 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 4 High V olume Potable W ater Heating Potable wat er Potable w ater is wat er that is suitable f or drinking. Bosch Wat er Heating appliances are appro ved to heat po table water onl y.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 27 4.1.1 Bosch Pro T ankless gas water heater in parallel for commercial applications T wo Bosch Pro T ankless units will have double the activation rate of a single unit.
28 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 4.2 Cascading unit applications A cascading application should be considered if the pot ential hot wat er demand exceeds t he capacity of one GWH 715 ES or GWH C 800 ES.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 29 4.3 External storage tank loading applications. Introduction This section lay s out tank loading options for high v olume wa.
30 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 4.3.2 Single unit tank loading application plumbing diagram The GWH 345/450 ESR is speci fi cally designed for this application. Symbols Not e: This drawing is concep tual in nature and does not address all design, installation or saf ety considerations.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 31 4.3.2 Single unit tank loading application electrical diagram The follo wing shows the appr opriate electrical connections f or plumbing diagram 4.3.2 Not e: This drawing is concep tual in nature and does not address all design, installation or saf ety considerations.
32 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 5 Open Loop Space Heating Introduction This section is designed to pr ovide a road map of t echniques f or using a tankless wat er heater t o heat domestic water and at t he same time provide space heating in r esidential applications.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 33 5.1.1 Radiant space heating and DHW electrical diagram The follo wing shows the appr opriate electrical connections f or plumbing diagram 5.1.1 Not e: This drawing is concep tual in nature and does not address all design, installation or saf ety considerations.
34 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 5.1.2 F an coil space heating and DHW plumbing diagram Symbols Not e: This drawing is concep tual in nature and does to addr ess all design, installation or safety considerations.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 35 5.1.2 F an Coil space heating and DHW electrical diagram The follo wing shows the appr opriate electrical connections f or plumbing diagram 5.1.2 Not e: This drawing is concep tual in nature and does not address all design, installation or saf ety considerations.
36 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 5.1.3 Baseboard/ Radiant Panel space heating and DHW plumbing diagram Symbols Not e: This drawing is concep tual in nature and does not address all design, installation or saf ety considerations.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 37 5.1.3 Baseboard/Radiant Panel space heating and DHW electrical diagram The follo wing shows the appr opriate electrical connections f or plumbing diagram 5.
38 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 5.1.4 Baseboard/ Radiant Panel space heating and DHW (with Ariston mini tank) plumbing diagram Symbols Not e: This drawing is concep tual in nature and does not address all design, installation or saf ety considerations.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 39 5.1.4 Baseboard/Radiant Panel space heating and DHW (with Ariston mini tank) electrical diagram The follo wing shows the appr opriate electrical connections f or plumbing diagram 5.
40 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 5.1.5 Baseboard/ Radiant Panel space heating and DHW (without storage tank) plumbing diagram Symbols Not e: This drawing is concep tual in nature and does not address all design, installation or saf ety considerations.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 41 5.1.5 Baseboard/Radiant Panel space heating and DHW (without storage tank) electrical diagram The follo wing shows the appr opriate electrical connections f or plumbing diagram 5.
42 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 5.2 Indirect T ank Applications 5.2.1 Indirect Baseboard/ Radiant Panel space heating and DHW plumbing diagram Note: No t suitable for space heating applications requiring high w ater t emperature.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 43 5.2.1 Baseboard/Radiant Panel space heating and DHW electrical diagram The follo wing shows the appr opriate electrical connections f or plumbing diagram 5.
44 | Applications manual Application manual | 11.2007 Bosch Wat er Heating 6 Maintenance Drawings Bosch appliances are designed t o last for man y years. In order t o k eep the heater operating pr operly , periodic maintenance is r equired. Please consult the installation manual for maint enance intervals.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 45 6.1 Descaling procedure diagram Symbols Ser vice valves Not e: This drawing is concep tual in nature and does not purport to address all design, installation or saf ety considerations.
46 | Applications manual Application manual | 11.2007 Bosch Wat er Heating.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 47.
48 | Applications manual Application manual | 11.2007 Bosch Wat er Heating.
Applications manual | 11.2007 Bosch Wat er Heating Applications manual | 49.
BBT North America Corpor ation Bosch Group Bosch W ater Heating 50 Wentw or th Ave Londonderry, NH 03053 T elephone (603) 882-1100 F ax (603) 584-1681 www.
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