Warning: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasoline or other flammable vapor and liquids in the vicinity of this or any other appliance. Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency or the gas supplier.
| Index Index 1 Key to symbols and safety instructions . . . . . . . . . . . . 3 1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Appliance details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 330 PN specifications (Technical data) . . . . . . . . 3.2 Unpacking the 330 PN heater . . . . . . .
Key to symbols and safety instructions | 3 1 Key to symbols and safety instructions 1.1 Key to symbols Warnings 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.
| Key to symbols and safety instructions Danger from escaping flue gases ▶ Ensure all vent pipes and chimneys are not damaged or blocked. ▶ Connect only one appliance to each vent system or chimney liner. ▶ The venting system piping must not feed into another air extraction duct. ▶ Do not route the flue system piping through or inside another air extraction duct. Danger of explosion of flammable gases ▶ Work on gas components may only be carried out by a trained and certified installer.
Key to symbols and safety instructions | 5 Flooding ▶ After a flood, do not use the appliance if any part has been submerged. Damage to appliances that have been submerged can be quite severe and pose numerous safety risks. ▶ Every appliance that has been submerged must be replaced. For your safety ▶ Do not store or use gasoline or other flammable, combustible or corrosive vapors and liquids in the vicinity of this or any other appliance. DANGER: Fatal accidents! Carbon monoxide poisoning.
| Warning WARNING: Fire danger! ▶ Keep appliance area clear and free from combustible materials, gasoline and other flammable vapors and liquids. WARNING: Personal Injury from toxic chemicals. ▶ Toxic chemicals, such as those used for boiler treatment, shall not be introduced into the potable water used for space heating. NOTICE: ▶ Do not obstruct the flow of combustion and ventilation air. WARNING: Personal Injury from toxic chemicals.
Appliance details | 7 Propane water column 10.5” - 14” Natural Gas water column 5.7” - 14” Hot water connection inches ½ ” NPT Cold water connection inches ½ ” NPT Capacity GPM (l/ min) 2.6 (9.8) Minimum water flow2) GPM (l/ min) 0.5 (1.9) Minimum recommended water pressure PSI (bar) 13 PSI (0.9 bar) Water Water valve material Fibreglass reinforced polyamide (PA) Connections: Bottom of heater Dimensions Depth inches(mm) 8.66” (220 mm) Width inches(mm) 12.
| Appliance details 3.2 Unpacking the 330 PN heater This heater is packed securely. Before installing the unit, be certain you have the correct heater for your type of Gas - Propane or Natural Gas. Identification labels are found on the shipping box, and on the rating plate which is located on the right side panel of the cover. In Canada: The Installation should conform with CGA B149.(1,2) INSTALLATION CODES and /or local installation codes. 2. Carefully plan where you install the heater.
Appliance details | 9 3.4 Dimensions and installation clearances Fig. 3 [4] [5] [10] [11] [20] [26] [36] Dimensions in Inches and (mm) [37] Hole for fixing to wall [38] Exhaust pipe to connector [39] Draft diverter with flue gas monitor [40] Gas valve [49] Observation window [102]Piezo Heat exchanger Burner Temperature control Water valve Gas connection Output control Front cover Dimensions inches (mm) 330 PN A 12. (310) Table 3 330 PN B 22.
| Installation instructions ▶ 2. The hot water lines should be kept short to save energy. Centrally locating the water heater is best. It is always best to have hot water lines insulated. Fig. 4 WARNING: The water in this water heater is cold and always remains cold except for the times that hot water is being used. ▶ DO NOT INSTALL IN AN AREA WHERE IT COULD FREEZE. ▶ Drain the heater entirely if freezing temperatures are anticipated in area where heater is installed. See chapter 5.
Installation instructions | 11 4.3 Heater placement and clearances The 330 PN is design certified for installation on a combustible wall (see 4.4 Mounting installation) provided the wall is not covered with carpet or other fabric material. For installations in an alcove or closet, maintain the minimum clearances to combustible and non-combustible materials listed below. See also Fig. 4. A. Top 12 inches (306 mm) B. Front 4 inches (100 mm) C. Back 0 inches D. Sides 4 inches (100 mm) E.
| Installation instructions 1 2 3 Fig. 7 Support board [1] Wall studs [2] Support board [3] 1”x4” Space board requirements are followed, the unit will operate properly and safely. However, there may still be a risk of freezing due to negative draft if all the combustion appliances in the building or structure are not being supplied with a sufficient amount of make-up air. A wood stove or furnace can pull outside air down through the BOSCH PRO vent pipe and across the heat exchanger tubing.
Installation instructions | 13 4.6 Venting DANGER: ▶ Do not reduce the vent pipe size. ▶ Do not put an elbow directly on top of heater. Failure to follow venting requirements may cause dangerous exhaust gases to enter living space. ▶ Minimum vent pipe diameter: 4 inches ▶ Minimum vertical vent height: 6 feet, with no elbows ▶ Establish 12 inch rise before any elbow The heater must be vented to the outside following all local ordinances and specifications for installing a gas appliance vent or chimney.
| Installation instructions pipe (metal double wall Type B), or an approved clay flue liner or a listed chimney lining system must be used when venting into a naturally drafting, internal masonry chimney. Local codes may require the use of both gas vent and an approved lining system when venting into a masonry chimney. The Commonwealth of Massachusetts requires the use of a listed liner.
Installation instructions | 15 Fig. 12 Installation of Gas Pressure Regulator Note: The 330 PN comes with a gas pressure regulator. Failure to install or altering the gas pressure regulator will be a violation of CSA certification of the unit. The regulator supplied with the heater is preset for the gas shown on the rating plate to the correct pressure. It is an appliance level regulator designed for (low inlet) pressure (less than 1/2 Psig or 14" W.C.). Fig.
| Installation instructions When connections are made, check for gas leaks at all joints. Apply some gas leak detection solution to all gas fittings. Bubbles are a sign of a leak. A combustible gas detector may also be used to detect for leaks. DANGER: ▶ If you have a leak, shut off the gas. Tighten appropriate fittings to stop leak. Turn the gas on and check again with a gas leak detection solution. Never test for gas leaks using a match or flame.
Installation instructions | 17 GAS LINE SIZING The gas supply piping should be sized according to the applicable code for a maximum draw of 74,900 BTUH. Measure the length of gas supply line and use the tables in page 17 or the gas line manufacturer’s sizing tables to determine the pipe diameter necessary to accommodate the BTU demand of the unit. If there are more gas appliances drawing on the same line, size the gas line according to the total maximum amount of BTU draw for all appliances.
| Installation instructions Lenght of Flexible Corrugated Stainless Steel Tubing (CSST), Feet Tube size inches 20 30 40 50 60 1/2 EHD* 18 10 129 91 74 64 58 53 3/4 23 254 183 151 131 118 107 1 30 521 365 297 256 227 207 1 - 1/4 37 971 661 528 449 397 359 Table 9 * EHD = Equivalent Hydraulic Diameter. The greater the value EHD, the greater the gas capacity of the tubing.
Installation instructions | 19 4.8 Measuring gas pressure Connecting manometer ▶ Shut off gas. ▶ Remove front cover and locate inlet gas pressure measuring point on the right side, see Fig. 13. ▶ Loosen screw from test point on the right side and connect manometer tube on test point. Fig. 13 Gas pressure measuring point [A] Inlet tap Static pressure test ▶ Turn gas supply back on. ▶ Record static gas pressure reading on back page of manual.
| Operation instructions The use of a small electric mini-tank (4-6 gallon size) should be used for this application and designed so the pump will circulate the water through the mini-tank and the building's hot water return loop only. A timed or thermostatically controlled operation of the pump is commonly done. The 330 PN should be plumbed in line before the mini-tank water heater. Contact Bosch Water Heating if further instruction is needed. 5 Operation instructions 5.
Operation instructions | 21 appliance and to replace any part of the control system and any gas control which has been under water. 5.2 ▶ Fully depress gas valve button. Lighting instructions ▶ STOP! Read the previous safety information. ▶ The gas valve must be turned off by sliding the gas valve button to all the way to the left. Fig. 18 ▶ With the gas valve button fully depressed, light pilot by pushing the piezo button. This step may have to be repeated. Fig.
| Operation instructions 5.3 To turn off appliance ▶ Slide the gas valve button all the way to the left and turn off the installer supplied manual gas shutoff on the supply line to the heater. Clockwise Counterclockwise 90 °F 45 °F Activation rate 0.5 GPM 1.1 GPM Max flow rate 2.0 GPM 3.
Maintenance and service | 23 5.5 Draining water from heater If there is a risk of freezing, proceed as follows: ▶ Remove the retaining clip from threaded bushing (pos. 1). ▶ Remove threaded bushing (pos. 2) from water valve. ▶ Empty the appliance of all water. ▶ Clean pilot assembly and clean or replace orifice ( 6.3) 6.2 Water valve The water valve is the main control that tells the heater to fire. If the periodic maintenance is neglected, more costly damage may occur over time.
| Maintenance and service Cleaning pilot assembly Shut off gas supply to the heater using installer supplied manual gas shutoff. Locate pilot gas tubing mounted in the center of the burner assembly. At the base of the pilot gas tubing there is a retaining clip. Release pilot gas tubing from this clip. Push upwards on other end of pilot gas tubing to release it from burner mount. Remove brass hex headed pilot orifice from gas valve (located near base of pilot gas tubing).
Troubleshooting | 25 3. Verify a spark is being thrown at pilot area while gas control slide button, centered in the single flame position, is being firmly depressed. Repeatedly push in pilot igniter button to light the pilot. If no spark is present, verify proper wire connection to the electrode. 4. Pilot assembly may be blocked. Clean or replace the pilot orifice (chapter 6.3). 7.3 Pilot lights, but goes out when button is released 1.
| Troubleshooting proper draft. 4. Confirm that the burners in the water heater go off immediately when the hot water is turned off. If they remain on or shut down slowly, then the overheat sensor (ECO) will interrupt the pilot circuit and shut off all gas to the heater. The water valve assembly, which actuates the burners, may be dirty and require periodic maintenance (every 2 - 5 years depending on water quality and use) (see chapter 6.2). 5. Check all connections of the pilot safety circuit.
Troubleshooting | 27 of a temperature balance shower valve, refer to shower valve manufacturer's instructions for internal adjustment setting. An adjustment should be made to minimize the amount of cold water the valve is adding. 3. Ensure the gas control slide button is all the way to the right. In addition, the temperature adjustment knob on water heater maybe set too low. Turn the knob clockwise for higher temperatures and test the water temperature. 7.
| Protecting the environment 5. If the water has a high mineral content, the heat exchanger may be scaled internally. This restricts the water path, causing diminished water flow. Instructions for descaling the heat exchanger are available at www.bosch-climate.us. 7.11 Noise when heater is running 1. Confirm adequate flow rate through the unit. With cold supply shut off to the unit, disconnect hot outlet side to the unit. Place a half gallon jug under hot outlet to catch water.
Interior components and diagram parts list | 29 9 Interior components and diagram parts list 9.1 Interior components Fig.
| Interior components and diagram parts list 9.2 Fig.
Interior components and diagram parts list | 31 9.3 Parts list Item Description Reference Item Description Reference 33 Piezo igniter 8 708 108 051 0 1 Front cover 8 738 708 495 34 Fixing bracket 8 701 302 181 0 2 Shield 8 738 708 497 35 Ignition lead 8 704 401 040 0 3 Temp.
| LIFETIME LIMITED WARRANTY FOR BOSCH TANKLESS WATER HEATERS 10 LIFETIME LIMITED WARRANTY FOR BOSCH TANKLESS WATER HEATERS MODELS COVERED This limited warranty is provided by Bosch Thermotechnology Corp. (BTC) and covers models 330 PN (hereinafter referred to as "Water Heater"). This warranty is provided as long as the Water Heater remains in the possession of the original purchaser and installed at its original place of installation.
LIFETIME LIMITED WARRANTY FOR BOSCH TANKLESS WATER HEATERS | 33 LIMITED WARRANTY. BTC SHALL NOT BE LIABLE FOR ANY INDIRECT, PUNITIVE, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR SIMILAR DAMAGES INCLUDING, WITHOUT LIMIITATION, INJURY OR DAMAGE TO PERSONS OR PROPERTY OR DAMAGES FOR LOSS OF USE, LOST PROFITS, INCONVENIENCE OR LOSS OF TIME. NOTE THAT ANY REPAIRED OR REPLACED PRODUCT WILL BE WARRANTED FOR ONLY THE UNEXPIRED TERM OF THE ORIGINAL WARRANTY.
| Installer Checklist to be completed by installer upon installation 11 Installer Checklist to be completed by installer upon installation Serial Number (8 digit serial number is located on rating plate on right side panel) ___ ___ ___ ___ ___ ___ ___ ___ Gas Pressure Reading 1) Static Operating Water Pressure Building Water Pressure Range if on Well system Installing Company Installer name Address Phone Table 14 1) See Chapter 4.
| 35 Notes 330 PN 6 720 644 951 (2014/11)
