Introduction

1 Introduction

1.1 Parts included

Vent Hood Kit

•1 - 4" vent hood: VH1-4

•4 - Exterior screws

•1 - 5" to 4" vent reducer pipe

•1 - AQ4FLAPPER back draft accessory

Vibration Mount Packet

•2 - Vibration mounts with nuts and washers

•2 - Brackets with nuts and washers

Flow Switch Packet

•1 - Flow switch

•3 - Replacement pipes (See chapter 2.7)

•2 - Pipe clips

•1 - Molex connector cable

•1 - Heat exchanger bushing

Power vent motor

•1 - Power vent motor (HSUL-1 Series containing integrated 24v control circuit) including 25 foot control cable with wire nuts and an HPN 6-foot power cord

•5 - Nylon ties

Warning: Failure to install AQ4FLAPPER properly may allow freezing air to come in contact with the water heater’s heat exchanger and cause the heat exchanger to burst. Such damage is not covered under the water heater’s warranty.

1.3 Preparation

1.Follow installation and operating instructions manual supplied with the water heater.

2.Before mounting water heater to wall, check its minimum clearance requirements.

3.When using an AQ4 the maximum vent length from the water heater to the point of termination is 25 feet. Subtract 5 feet for each additional 90° elbow (up to two additional elbows allowed.)

4.Install power vent motor as close to the vent hood as possible.

1.2 Warnings

1.Failure to install, maintain and/or operate the power vent in accordance with manufacturer’s instructions may result in conditions which can produce bodily injury and property damage.

2.The power vent must be installed by a qualified installer in accordance with all local codes or, in their absence, in accordance with the National Fuel Gas Code (ANSI Z223.1 NFPA #54), the National Electric Code, the Canadian Electrical Code (C22.1), Canadian Gas Code (CSA B149.1) and The Occupational Health and Safety Act (OSHA) as applicable.

3.The power vent motor shaft must be mounted horizontally to prevent motor bearing wear.

4.Disconnect power supply when making wiring connections or when working around the fan blade and motor. Failure to do so may result in severe personal injury and equipment damage.

5.Make certain the power source is adequate for the fan motor requirements. Do not add the power vent to a circuit where the total load is unknown. AQ4 Motor is 200 watts- 1.66 amps @ 120vac.

6.Locate the outlet receptacle as close to the vent motor as possible. Do not use an extension cord.

AQ4 Manual

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Bosch Appliances GWH 1600 P, GWH 425 HN, GWH 425 PN, GWH 1600 H installation manual Introduction, Parts included, Preparation
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GWH 425 PN, GWH 1600 P, GWH 1600 H, GWH 425 HN specifications

Bosch Appliances have long been synonymous with innovation and reliability in the realm of home comfort solutions. Four notable models in their range of gas water heaters are the GWH 425 HN, GWH 1600 H, GWH 1600 P, and GWH 425 PN. Each unit is developed to meet diverse user needs while providing the highest levels of efficiency and performance.

The Bosch GWH 425 HN is a high-capacity unit catering to larger households or commercial environments. With an impressive heat output, this model ensures a consistent hot water supply when needed. Key features include advanced combustion technology for enhanced efficiency and reduced emissions, making it an environmentally-friendly choice. Its compact design allows for flexible installation options, fitting seamlessly into tight spaces. Additionally, the unit is equipped with an intelligent control system that optimizes performance based on usage patterns.

Moving on to the Bosch GWH 1600 H, this water heater is perfectly suited for smaller homes and apartments. It combines user-friendly operation with energy-saving capabilities. This model utilizes a unique modulating burner system that adjusts the flame intensity according to water demand, significantly lowering energy consumption. Furthermore, the GWH 1600 H incorporates a built-in safety system that ensures optimal operation under varying conditions.

The Bosch GWH 1600 P offers a similar capacity as the GWH 1600 H but with added digital functionalities. Users can expect advanced temperature settings and real-time monitoring through an intuitive digital display. This model prioritizes ease of use, allowing homeowners to customize their hot water experience effortlessly. The GWH 1600 P also reflects Bosch’s commitment to durability, featuring robust construction suitable for various environmental conditions.

Lastly, the Bosch GWH 425 PN is another versatile choice for those needing robust hot water production. It shares many characteristics with the GWH 425 HN, like high efficiency and smart technology. However, it distinguishes itself with innovative low-NOx technology, reducing nitrogen oxide emissions to meet stringent environmental regulations.

In summary, Bosch's GWH 425 HN, GWH 1600 H, GWH 1600 P, and GWH 425 PN represent a diverse selection of gas water heaters designed to suit different household needs. Whether it’s for a larger family or a compact apartment, these models provide efficient and reliable hot water solutions while employing advanced technologies to minimize environmental impact. With their focus on quality and customer satisfaction, Bosch Appliances continues to lead the way in the hot water industry.
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