PLATINUM
WATER HEATER
20
PV500-37C 06/12
WARNING: If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal injury or
loss of life.
10.
SEQUENCE OF OPERATION:
1.
When the water heater is powered (120 volts) through the ON-Off control switch, the Hot Surface Ignition
Control will reset and perform a self-check routine to verify no flame is present before the call-for-heat
sequence begins.
2.
The Digital Temperature Control (thermostat) displays the actual water temperature in the tank.
3.
If the actual water temperature inside the tank is below the programmed temperature setpoint differential of
the digital temperature control, a call-for-heat is activated.
4. When a call-for-heat is received from the thermostat, the ignition control will perform a safety timing
sequence and flame check. If all checks are successfully passed, the combustion blower is energized for a
15-second pre-purge period.
5.
When the pre-purge period is complete, the hot surface igniter (HSI) is energized for a 40-second heat-up
period, followed by the gas valve for the 4-second trial-for-ignition (TFI) period. The igniter remains
energized throughout the TFI period.
6.
The ignition control will monitor for flame through the HSI during the trial for ignition period. If a valid flame is
detected the gas valve remains energized.
7.
The thermostat and main burner flame signal are constantly monitored by the ignition control to assure that
the system operates properly. The control will continuously monitor the flame during the heating period.
8.
If the burner fails to light or the flame is not detected during the first TFI, the gas valve is deenergized.
Following a purge period, the ignition control will make three TFI attempts before locking out.
9.
If the flame signal is lost while the burner is operating, the ignition control will de-energize the gas valve.
Following a purge period, the ignition control will make three TFI attempts before lockout. If flame is
reestablished, normal operation resumes.
10.
When the thermostat is satisfied and the demand for heat ends, the gas valve is de-energized.
10.1 For Your Safety
Read
Before
Operating
10.2 To Turn Off Gas To Appliance
1.
Turn off all electric power to the appliance if service is to be performed.
2.
Locate manual gas shutoff valve by looking where the gas pipe enters the appliance and follow the gas line
away from the appliance jacket until you reach the manual gas shutoff valve.
3.
Turn the gas off by rotating the gas valve handle 90 degrees to aim across the pipe. (The gas valve is on
when the handle is parallel to the gas pipe).
4.
Use only your hand to turn the gas control lever. Never use tools. If the lever will not turn by hand, don’t try
to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.
10.3 Smell for Gas
- BEFORE OPERATING, smell around the appliance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and will settle to the floor.
What To Do If You Smell Gas
Do not try to light any appliance.
Do not touch any electric switch; do not use any phone in your building.
Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
If you cannot reach your gas supplier, call the fire department.
Manual Gas Valve (Cock)
