Table of Contents | Bosch Appliances GWH 1600 H, GWH 425 HN specification

Table of Contents
	Table of Contents
1 Introduction		3
1.1	Parts included	3
1.2	Warnings	3
1.3	Preparation	3
1.4	Requirements for installation in
	Massachusetts	4
2 AQ4 Installation instructions		5
2.1	Introduction	5
2.2	Locating power vent hood and
	clearances	5
2.3	Power vent hood	5
2.4	Power vent motor	6
2.5	Vent piping	7
2.6	Linear safety spillage switch	7
2.7 Flow switch		8
3 Operation		9
3.1	First time start up	9
4 Maintenance		9
5 Troubleshooting		10
5.1	Introduction	10
5.2 Power vent motor runs all the time or
	intermittenly without water flow	10
5.3 Pilot will not hold when lit or spark
	automatically with hot water flow	10
5.4	Pilot goes out during hot water use	10
5.5	Noise when power vent motor is
	running	10
6 One Year Limited Warranty		11
7 Wiring diagram		12
8 Vent hood template		13

2	AQ4 Manual

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.