AQ4 Installation instructions | Bosch Appliances GWH 425 PN manual

AQ4 Installation instructions

2 AQ4 Installation instructions

2.1 Introduction

Please follow these instructions. Failure to follow instructions may result in:

·Damage, injury or death

·Improper operation

·Loss of warranty

If you are unable to perform the tasks required to install the water heater and this accessory properly, please contact a locally licensed plumber, HVAC contractor or gas technician.

Please contact Bosch Water Heating with any questions.

2.2Locating power vent hood and clearances

The maximum vent length from the water heater to the point of termination is 25 feet. If using more than one 90° elbow, subtract 5 feet off the maximum vent length for each additional elbow used. Maximum of three elbows allowed.

The power vent motor must be installed as close as possible to the VH1-4 vent hood.

Clearances

The vent system must terminate so that proper clearances from the center of the vent hood (Fig. 1) are maintained as cited in the National Fuel Gas Code, ANSI Z223.1 and CSA B149.1 in Canada:

“The vent terminal shall also not be installed closer than 3 feet from the inside corner of an L-shaped structure, or less than 1 foot above grade or anticipated snow pack level.”

Also:

“The exit terminals of mechanical vent system shall be located not less than 7 feet above grade when located adjacent to a public walkway. The venting system shall terminate at least 3 feet above any forced air inlet within 10 feet. The venting system shall terminate at least 4 feet below, 4 feet horizontally from or 1 foot above any door, window or gravity air inlet into any building.”

2.3 Power vent hood

1.Attach the mounting template (on page 13) to the interior wall that the vent hood will be penetrating.

2.Insure the proposed vent termination clearances are met (Chapter 2.2) before cutting opening through wall. Using a 1/2" drill bit, drill two pilot holes where noted on the template. The drill bit must be long enough to penetrate to the building exterior.

3.Attach the template to the outside of the building aligning the pilot holes on the template with the pilot holes drilled in step 2.

4.Using a reciprocating saw, cut a hole through the building siding, wall board, etc., following the appropriate lines of the template.

5.Apply a bead of exterior-rated caulk to the vent hood flange to seal at the exterior of building.

6.Slide the vent hood through the opening and fasten to exterior wall using screws provided.

7.Install backdraft flapper using the instructions included with flapper.

Fig. 1 External vent hood clearances

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.