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TURBOPOWER 99
WATER HEATER
PV500-12 08/12 20
13 START-UP PROCEDURE
WARNING: You must connect the supplied gas train assembly to the burner union. Then connect the gas
supply to the gas train. Do not connect the gas supply directly to this union. Failure to install the
supplied gas train to the burner union before connecting the gas supply may result in uncontrolled gas
flow into the appliance and/or the appliance area. Failure to follow this warning could result in fire or
explosion causing property damage, personal injury or death.
1. Turn off all electrical power to the appliance.
2. Check all electrical connections for tightness, proper voltage and proper grounding.
3. Fill the unit with water. Open the relief valve and vents until a steady water flow is observed flowing from the
highest point in the tank or system. Close the relief valve and continue filling the system at a rate that
permits air to vent out of the piping.
4. Be sure all connections into the tank are tight, as leaks at tank fittings will damage the insulation.
5. CAUTION: Conduct the following gas train leakage test before start-up, at annual intervals and prior to
investigating the cause of any reported occurrences of delayed ignition.
a. Using an appropriate bubble detection solution, thoroughly coat all gas train pipe connections. If any
bubbles are detected, the leaking connection must be tightened, recoated, and rechecked to assure
stoppage of the leak.
b. Attach a manometer to measure the gas pressure at the manual gas shutoff valve located just upstream
of the gas train. Assure the gas train inlet pressure is within the maximum static pressure specified (e.g.
14" W.C.), and tightly close the gas train manual shutoff valve closest to the burner. Disconnect the
manometer.
c. Attach the manometer to the gas train manual shutoff valve closest to the burner and record the
measured gas pressure in inches of water column (W.C.). Measure and record the gas pressure again
after 15 minutes. If gas pressure has increased from the starting gas pressure, there is a gas leak
through all gas valve seats. The gas leak must be further isolated to one or more of the operating gas
valves. (For example, a solenoid actuated gas shutoff valve.)
d. Turn off the main manual gas shutoff valve. Replace any leaking valve, then reassemble and leak test
the gas train again before start-up is attempted.
6. Verify that the unit is supplied with the type of gas specified on the rating plate.
7. Before beginning test, make sure the main manual gas valve is in the “OFF “position.
8. Check the inlet gas pressure before start-up, using a manometer or a 0 to 28" W.C. pressure gauge (This is
the pressure measured before all components in the gas train). The manometer must stay connected
throughout the testing, as the inlet pressure must be monitored during the firing of the burner. Record static
pressure. The maximum inlet gas pressure must not exceed the value specified on the information label.
Pressures above this value could cause damage to the diaphragm in the gas valve or pressure regulator.
9. Drill hole in vent pipe 12” to 24” from appliance flue outlet, but below draft regulator (for combustion analysis
equipment).
10. Turn on all electrical power to the appliance. Reset all safety devices (high limit, pressure switch, Low-water
Cutoff, etc.).
11. Set the digital Temperature Control on the front control panel to the desired inlet water temperature.
12. Set the adjustable limit just above the setpoint of the digital control.
13. Turn the manual gas valve to the “ON” position.
14. The Ignition Control should go through its “Call For Heat” process and ignite the burner (see “Sequence of
Operation”).
15. If the operating control switches are closed, the burner blower should come on and pre-purge begins.
16. If nothing happens, check for a lockout condition and reset it by pushing the flame safeguard reset button.
Some safety devices are wired in the operating circuit and may not indicate alarm. If no indication of alarm
exists, check gas pressure switches, electronic and float low water cutoffs and temperature limits.
17. After the pre-purge, the flame control energizes spark ignition and opens the gas valve for approximately 4
seconds. After the burner has lit and the primary safety control senses a flame, the burner will remain on
until the call for heat is satisfied or operation is interrupted by a safety devise.