Dhw Water Pipe Installation - Baxi H2O 40 GL Manuel D'installation, D'utilisation Et D'entretien

3. DHW Water Pipe Installation

Install DHW water piping and components as follows:
• Shut off the cold water supply at the main shutoff valve.
• Open one or more faucets to relieve the pressure. Open the system drain, leave faucets open.
• Drain the domestic water system.
• Install piping and fittings, connecting the tank cold water inlet and cold water supply of the residence, using a union, heat trap, shut-off valve, vacuum
breaker, expansion tank (where required), and filter (manufacturer recommended to prevent sediment buildup).
• Connect the tank DHW hot water supply piping. Install piping to hot DHW hot water supply connection using a union, heat trap, vacuum breaker, and
shut-off valve.
• Install Pressure Temperature Relief Valve. Pipe the relief valve discharge so discharge from the valve exits only within 6 inches above, or at any
distance below, the structural floor. Any discharged water for the indirect water heater shall not contact any live electrical part. The discharge opening
must not be blocked or reduced in size under any circumstances.
• The Pressure and Temperature Relief Valve shall be installed a maximum of 8" away from the tank on the DHW Outlet connection. Placing Pressure
Temperature Relief Valve to close to the tank during installation could cause damage to the tank due to soldering. See Figure 3.
• Fill the water heater tank. Open all faucets to allow air to purge from the tank and piping. Remove screens on faucets. Open domestic hot water shut-
off valve. Open cold water inlet shut-off valve. Purge all air from the domestic water system. Allow water to run so the tank is completely purged of any
debris. Run the water long enough to change at least five tank volume changes. Close all faucets. Reinstall all of the screens in the faucets. Check the
system for leaks. Repair as required.
When installing on a city supply, a properly sized thermal expansion tank is required and installed in accordance with the product manufacturer's installation
manual.
When a water heater is installed in a closed water supply system, such as one having a backflow preventer in the cold water supply, a check valve in the
cold water supply, or a pressure reducing valve in the cold water supply provide a means to control thermal expansion.
Ground the appliance in accordance with local codes, or in absence of local codes, with the National Electrical Code, ANSI/NFPA 70.
If this product is connected to a cold water supply line that has a check valve, a backflow preventer, a pressure reducing valve, or a water meter with a
built in check valve, it is a requirement of the Uniform Plumbing Code in absence of such the authority having jurisdiction, that a properly sized thermal
expansion tank be installed in the cold water inlet line.
Burn, scald hazard. Temperature pressure valve could discharge steam or hot water during operation. Install discharge
piping per the instructions given below.
Temperature Pressure Relief Valve Installation:
• Install discharge line so water discharged from the temperature and pressure relief valve exits within 6" six inches above, or any distance below, the
structural floor.
• Install temperature Pressure valve so discharge shall not contact any live electrical part.
• Install temperature pressure valve with spindle in vertical position.
• Do not install a valve or shutoff device between tank and temperature pressure valve.
• Install discharge line to allow for complete drainage of both temperature pressure relief valve and the discharge line.
• Discharge opening must not be subjected to blockage or freezing.
• Size and arrange discharge piping to avoid reducing Temperature Pressure Valve relieving capacity below minimum relief valve capacity.
• Run pipe as short and straight as possible to location protecting user from scalding and properly drain piping.
• Terminate pipe with plain end (not threaded).
• do not thread, plug, or cap discharge line.
• Maintain minimum clearance of four (4) inches on side of water heater for servicing and maintenance of temperature pressure valve
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WARNING
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PN 615000250 REV. B [01/09/2019]