WARNING: Follow each appliance's instructions precisely. Installation and service must be performed by a trained and certified installer, service agency or the gas supplier. Application drawings in this manual are conceptual only and do not purport to address all design, installation, code, or safety considerations. The diagrams in this manual are for reference use by code officials, designers and licensed installers.
| Greentherm T9800 SE(C) 160/199 Data subject to change Application Manual 04.2018 | Bosch Thermotechnology Corp.
Application Manual Greentherm T9800 SE(C) 160/199 | 3 Table of Contents 1 Key to symbols and safety instructions 4 1.1 Key to symbols 4 1.2 Safety 4 2 Introduction 5 3 Water heater sizing and specifications 6 3.1 Sizing tankless water heaters 6 3.2 Tankless water heater accessories 7 3.3 Tankless water heater specifications 8 4 Applications 9 4.1 Single T9800 Installation 9 4.2 Pump sizing for circulation 10 4.3 Domestic hot water recirculation 11 4.3.
| Greentherm T9800 SE(C) 160/199 Application Manual 1 Key to symbols and safety instructions 1.2 Safety 1.1 Key to symbols Please read safety precautions before installation Warnings WARNING: Warnings in this document are identified by a warning triangle printed against a grey background. Keywords at the start of a warning indicate the type and seriousness of the ensuing risk if measures to prevent the risk are not taken.
Application Manual Greentherm T9800 SE(C) 160/199 | 5 2 Introduction This Applications Manual is intended to present some of the most common applications of the Bosch Greentherm tankless water heaters. Application drawings are shown with both piping and corresponding electrical schematics where applicable. Auxiliary equipment depicted does not necessarily represent any one manufacturer or specific model number.
| Greentherm T9800 SE(C) 160/199 Application Manual 3 Water heater sizing and specifications This section describes the water heaters available from Bosch Thermotechnology Corp. and provides a general overview to the specifications of each particular model. More detailed information is contained in the installation manuals. Download manuals at www.bosch-climate.us. ME WA MT VT ND MN OR NY MI PA WY RI CT UT IL ˚F OH IN DE VA WV 3.
Application Manual Greentherm T9800 SE(C) 160/199 | 7 Inlet temperature (°F) Model 77° 72° 67° 62° 57° 52° 47° 42° 37° 9.3 GPM 8.3 GPM 7.5 GPM 6.9 GPM 6.3GPM 5.9 GPM 5.5 GPM 5.1 GPM 4.8 GPM 7.5 GPM 6.7 GPM 6.1 GPM 5.6 GPM 5.1 GPM 4.8 GPM 4.4 GPM 4.1 GPM 3.
| Greentherm T9800 SE(C) 160/199 Application Manual 3.3 Tankless water heater specifications Description Unit T9800 SE 160 T9800 SE 199 Maximum gas input2 BTU/hr (kW) 160,000 (46.64) 199,000 (58.3) Minimum input3 BTU/hr (kW) 9,000 (2.6) 9,000 (2.6) Maximum output BTU/hr (kW) 157,608 (46.2) 197,010 (57.7) % > 99% > 99% Performance Thermal efficiency (Efficiency in %) Maximum flow rate at a 35 °F (19.4 °C) rise¹ GPM (l/min) 9.0 (34) 11.2 (42.
Application Manual Greentherm T9800 SE(C) 160/199 | 9 4 Applications 4.1 Single T9800 Installation Domestic Hot Water Domestic Cold Water Gas NBT-23 Condensate Neutralizer 1) (part# 7 738 005 514) To drain or pump Legend Full-port ball valve Thermostatic mixing valve Union Check valve Aquastat Potable expansion tank 1) Pressure relief valve Drip leg / Sediment trap Recirc pump Figure 2 1) as required by local code.
1 0 | Greentherm T9800 SE(C) 160/199 Application Manual 4.2 Pump sizing for circulation The following section outlines pump sizing for domestic hot water recirculation and tank loading. Only models approved for such applications are listed in this section. Pump must be bronze or stainless steel and designed for potable water systems. Size the pump according to the pressure drop curve of your Greentherm model (fig. 1 below) and the loop pressure drop tables.
Application Manual Greentherm T9800 SE(C) 160/199 | 11 4.3 Domestic hot water recirculation 4. Hot water recirculation is a technology that provides hot water virtually instantly at the point of use by circulating hot water through your home’s domestic hot water pipes. Use the or keys to scroll through the menus until the display shows A1 Recirculation. The benefit of hot water recirculation is a reduction in the amount of water wasted while waiting for hot water to arrive at the point of use.
1 2 | Greentherm T9800 SE(C) 160/199 7. Application Manual There are two scheduling options: — AA Always Active — SCH Schedule c. Use the or recirculation. keys to select the day you would like to activate d. Touch the key. The display shows the scheduling menu for the selected day. AA Always Active Keeps your home’s domestics hot water pipes always heated by measuring the water at the inlet temperature sensor inside the water heater and turning the pump and burner ON as necessary. a.
Application Manual Greentherm T9800 SE(C) 160/199 | 13 4.3.2 Adjusting the recirculation settings 4.3.3 Adjusting the comfort Level The pump and burner turn ON and OFF based on a delta between the set point temperature on the water heater and the inlet water temperature sensor value. This delta is called the comfort level. 1. Starting from the home screen showing the set point temperature, touch the key on the water heater’s controls to enter the menus.
1 4 | Greentherm T9800 SE(C) 160/199 5. Application Manual Display shows a green check mark indicating the passcode has been accepted. The display will return to the home screen showing the set point temperature. Comfort Level 4 5 6 Authentication Technician Figure 19 9. Use the or keys to select the desired comfort level. Figure 16 10. Touch the 6. Touch the key to save the desired comfort level key on the water heater’s controls to enter the menus. Display shows P4 Information.
Application Manual Greentherm T9800 SE(C) 160/199 | 15 4.3.4 Recirculation with the Greentherm T9900 models The T9900 models have an integrated pump making hot water recirculation a snap. Head ( ) Refer to figure 20 for the pressure vs flow curve of the integrated pump to determine through the recirculation system.
1 6 | Greentherm T9800 SE(C) 160/199 Application Manual 4.3.6 Recirculation system types There are two basic types of recirculation systems. Dedicated return line making a complete hot water loop from the water heater to each water point of use and back to the water heater. Cross-over valve that connects the hot water line to the cold water line at the farthest fixture. 4.3.6.1 Recirculation system with dedicated return line The preferred recirculation system use a dedicated return line.
Application Manual Greentherm T9800 SE(C) 160/199 | 17 4.3.7 Determining the flow rate through the recirculation system There are three steps to calculating the flow rate though the recirculation system. 1. First, obtain the head vs flow rate chart for the pump. 2. Second, sum the pressure drop for the recirculation system a various flow rates to create a pressure vs flow rate chart 3.
1 8 | Greentherm T9800 SE(C) 160/199 Application Manual Below is the table summing up the pressure drop of each component in the recirculation loop at various flow rates. Item in recirculation loop Pressure drop at 0.5 GPM Pressure drop at 1.0 GPM Pressure drop at 1.5 GPM Pressure drop at 2.0 GPM 3/4" copper 90° 0.002 feet of head 0.006 feet of head 0.014 feet of head 0.023 feet of head 100ft of 3/4" hot water trunk line 0.089 feet of head 0.319 feet of head 0.676 feet of head 1.
Application Manual Greentherm T9800 SE(C) 160/199 | 19 4.3.7.2 Determining the flow rate through the recirculation system with a cross-over valve Below is the head vs flow rate curve for the T9900 pump T9900 Pump 12 Feet of Head 10 8 6 4 2 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 Flow Rate (GPM) Figure 29 Below is an illustration of the recirculation loop with identified components. Figure 30 DISCLAIMER: This drawing is conceptual in nature, not to scale and for reference only.
2 0 | Greentherm T9800 SE(C) 160/199 Application Manual Below is the table summing up the pressure drop of each component in the recirculation loop at various flow rates. Item in recirculation loop Pressure drop at 0.5 GPM Pressure drop at 1.0 GPM 3/4" copper 90° 0.001 feet of head 0.002 feet of head 50ft of 3/4" hot water trunk line 0.029 feet of head 0.044 feet of head 1/2" copper 90° 0.003 feet of head 0.005 feet of head 10ft of 3/4" hot water branch line 0.035 feet of head 0.
Application Manual Greentherm T9800 SE(C) 160/199 | 21 4.4 Tank loading Pressure drop vs. flow Tank loading pairs tankless water heaters with storage tanks to maximize peak flow for high demand applications. A tank load system, because of the added storage, can provide a high peak flow with fewer tankless units and lower installed cost. # of units Tank loading is recommend for high cycle applications such as commercial kitchens with hand sprayers.
2 2 | Greentherm T9800 SE(C) 160/199 Application Manual 4.4.1 Single T9800 tank loading installation Hot Water Supply Local code requirements may require installation of a thermostatic mixing valve in some installations. see wiring detail Section 4.
Application Manual Greentherm T9800 SE(C) 160/199 | 23 4.4.2 Single T9800 tank loading with recirculation installation Hot Water Supply Local code requirements may require installation of a thermostatic mixing valve in some installations. see wiring detail Section 4.
2 4 | Greentherm T9800 SE(C) 160/199 Application Manual 4.4.3 Multiple T9800 tank loading installation NOTE: 110 VAC pump relay and tank aquastat field supplied Hot Water Supply Pump Relay Local code requirements may require installation of a thermostatic mixing valve in some installations.
Application Manual Greentherm T9800 SE(C) 160/199 | 25 4.4.4 Multiple T9800 tank loading with recirculation installation NOTE: 110 VAC pump relay and tank aquastat field supplied Hot Water Supply Pump Relay Local code requirements may require installation of a thermostatic mixing valve in some installations.
2 6 | Greentherm T9800 SE(C) 160/199 Application Manual 4.5 Space heating 4.5.1 Single T9800 with Bosch air handler installation Local code requirements may require installation of a thermostatic mixing valve in some installations.
Application Manual Greentherm T9800 SE(C) 160/199 | 27 4.
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