A.O. Smith 100 Series, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Agent
START UP AND OPERATIONS
PRIOR TO START UP
In addition to normal supplies and hand tools necessary for installing and servicing the boilers/water heaters, other tools and test
equipment should be on hand. See Tools Required on Page 4 for detailed tool requirements.
Only an A. O. Smith Certified Start-up agent must perform the initial firing of the boiler/water heater. At this time the user should not
hesitate to ask the start-up agent any questions regarding the operation and maintenance of the unit. If you still have questions,
please contact the factory or your local A. O. Smith representative. Contact Technical Support noted on the back cover for the name
of your closest Certified Start-up Agent.
GENERAL
Never operate the boiler/water heater without first making sure the boiler/water heater and system are filled with water, in addition:
• Make sure a temperature and pressure relief valve is installed in the storage tank for hot water supply installations.
• Make sure that the boiler/water heater and system have been purged of air and checked for leaks.
Also ensure to check the gas piping for leaks before beginning the initial firing of the boiler/water heater.
FILLING AND PURGING OF BOILER/WATER HEATER INSTALLATION
1. Fast fill system through bypass until pressure approaches desired system pressure. Close bypass valve and permit pressure to
be established by the pressure reducing valve.
2. Vent all high points in system to purge system of air.
Provisions should be made to permit manual venting of radiators or convectors. Gas line purging is required with new piping or
systems in which air has entered.
FILLING BOILER/WATER HEATER INSTALLATION
1. Close the system’s drain valve by turning handle clockwise.
2. Open a nearby hot water faucet to permit the air to escape.
3. Fully open the cold water inlet pipe valve allowing the boiler/water heater and piping to be filled.
4. Close the hot water faucet as water starts to flow.
INLET GAS PRESSURE
The inlet gas pressure is measured by removing the 1/8” NPT Plug located on the upstream side of the supply gas valve, and
inserting a 1/8” NPT hose barb fitting to be connected to a manometer or pressure gauge. Once pressure has been checked and/
or adjusted, replace the plug and check for leaks. The maximum value specified must not be exceeded. The minimum values must
be maintained under both load and no load conditions (static and firing conditions). Refer to Instruction Manual of this boiler/water
heater for pressure values. The combination gas valves supplied with the boiler/water heater are for low pressure service. If upstream
pressure exceeds 14.0” W.C., an intermediate gas pressure regulator of the lockup type must be installed.
FIGURE 21. GAS TRAIN ASSEMBLY
BURNER
FLAPPER
BLOWER
VENTURI
GAS PRESSURE
SWITCH
FLEX GAS
MANIFOLDS
MANUAL GAS
SHUTOFF VALVE
MODULATING
GAS VALVE
DIFFERENTIAL MANIFOLD
PRESSURE TAP