Maintenance and service

5Maintenance and service

5.1Maintenance intervals

Warning: Failure to perform recommended maintenance may result in complete failure of the unit over time. The warranty does not cover failures due to improper or insufficient maintenance.

The GWH 1600 P requires periodic maintenance. The below time maintenance intervals should keep the unit operating for many years.

Every year

BInspect inlet water filter screen ( 5.2)

BInspect pilot assembly and flame ( 5.3)

BInspect burner assembly ( 5.4)

Every 2 years

BLubricate and clean water valve ( 5.2)

Every 3 to 5 years

BRebuild water valve ( 5.2)

BClean pilot assembly and clean or replace orifice ( 5.3)

5.2Water 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.

Inspecting inlet water filter screen

Shut off the installer supplied cold water isolation valve to the heater. If one is not installed, install before proceeding. Open the nearest hot water tap to drain the plumbing lines. Position a bucket under the heater's water valve assembly to catch any water that may drain from the heater. Remove the filter retaining clip located at base of water valve (see Fig. 26). Remove the threaded bushing to access the cylindrical filter inside. Remove filter, clean with water and inspect for damage. If the filter is at all damaged, it should be replaced.

Lubricating the water valve

A more detailed instruction is available on our website at www.boschhotwater.com. Shut off the installer supplied cold water isolation valve to the heater. If one is not installed, install before proceeding. Open the nearest hot water tap to drain the plumbing lines. Position a bucket under the heater's water valve assembly to catch any water that may drain from the heater. Disconnect the inlet water pipe going to the back of the water valve. Disconnect the water pipe leading out of water valve to the heat exchanger. Do this

by removing the retaining clip on water valve assembly and pulling the pipe free from the water valve. Loosen the two set screws at the bottom of the water valve where it connects to the gas valve. If the set screws are seized, STOP and call Bosch tech support before proceeding. Forcing and snapping seized set screws may cause irrevocable damage to the water valve and gas valve assemblies. Remove the water valve by pulling it to the right. Separate the two halves of the water valve by removing the five screws on the left side of the water valve. Apply lithium or faucet & valve grease to the pushrod and o-ring. (See Fig. 25, num. 23). Inspect the venturi and clean if necessary. (see Fig 29, num. 23).

Rebuilding the water valve

Several parts within the water valve should be replaced every 3 to 5 years depending on water quality and usage. The parts list and instructions can be found on our website at www.boschhotwater.com. Failure to rebuild the water valve can result in decreased performance or damage to the heater.

5.3Pilot

Inspecting pilot

The pilot should burn with a clean sharp blue flame. The flame should fully engulf the tip of the thermocouple. If it does not, clean the pilot assembly per procedure below.

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). Soak orifice and pilot gas tubing in carburetor cleaner for 30 minutes. Dry off and reinsert orifice in gas valve. If heater is an LP unit, replace orifice. Reinstall the pilot gas tubing following removal instructions in reverse. Open gas supply and return heater to service.

Caution: Do not ream or poke orifice as it will enlarge orifice opening.

6 720 608 030

17

Page 16 Page 18
Page 17
Image 17
AquaStar GWH 1600 P manual Maintenance and service, Maintenance intervals, Water valve, Pilot
Page 16 Page 18

GWH 1600 P specifications

The AquaStar GWH 1600 P is a state-of-the-art gas water heater designed to efficiently meet the hot water needs of residential users. Renowned for its innovative features and user-friendly technology, the AquaStar GWH 1600 P stands out in the competitive market of heating solutions.

One of the main features of this model is its impressive heating capacity. With a power output of 16 liters per minute, it ensures an abundant supply of hot water for multiple applications simultaneously. This makes it ideal for households with high-demand hot water needs, such as families or homes with multiple bathrooms.

The GWH 1600 P employs advanced combustion technology that optimizes fuel efficiency. It utilizes a microprocessor-controlled system that adjusts the gas flow based on the water demand, ensuring a consistent and efficient heating performance. This not only translates into energy savings but also contributes to reduced carbon emissions, making it an environmentally friendly option.

Another notable characteristic of the AquaStar GWH 1600 P is its safety features. The unit is equipped with a range of safety mechanisms, including an automatic shut-off system that activates in the event of a gas leak or excessive temperatures. This provides peace of mind for users, ensuring that safety is prioritized without compromising performance.

Moreover, the GWH 1600 P is designed for ease of installation and maintenance. It features a compact design, allowing for versatile placement options within a home. The intuitive digital display provides clear information on the operation, enabling users to monitor and adjust settings effortlessly.

The durability of the AquaStar GWH 1600 P is another characteristic worth mentioning. Constructed with high-quality materials, the unit is built to withstand the rigors of daily use, ensuring longevity and reliability.

In conclusion, the AquaStar GWH 1600 P gas water heater combines efficiency, safety, and durability into a single, powerful solution for hot water needs. With its robust performance and advanced technologies, it remains a top choice for homeowners seeking a dependable and economical heating solution for their hot water requirements. Whether for daily use or for special occasions, the AquaStar GWH 1600 P is equipped to deliver unmatched performance and satisfaction.
Top Page Image Contents