Vanguard Heating POWERMAX PM200 - Manual (Page 14)

12
OPERATING SEQUENCE
The booster heater is designed to produce 180-190 degree sanitizing rinse water for
commercial dishwashing machines. Specific performance depends upon the exact water
flow and supply water temperature. (See table)
PowerMax200 tm Performance Data
Temperature rise Gallons per Minute Gallons per Hour
40
o
F 8.7 520
50
o
F 7.0 420
60
o
F 5.8 348
70
o
F 5.0 300
140
o
F 2.5 (7.5 for 15 sec. Per minute) 150
After the necessary power, water, gas and vent connections are completed correctly and
all air is purged from gas and water piping, the unit is started by turning on the power
switch located on the top, front of the left side panel. The combustion air fan will start and
run continuously and the digital temperature display will light, showing the water
temperature in the accumulator tank. If the tank temperature sensor detects water
temperature below the set point, it will turn on the internal circulating pump, prove water
flow, combustion air flow and hi-limit compliance and activate the hot surface igniter.
Following a 3 second warm up for the igniter, the gas valve opens and the burner ignites.
If the burner flame is not proved within a few seconds, the gas valve automatically closes.
This cycle will repeat 3 times. If ignition/flame is not proved the control will go into
automatic lock-out, requiring a re-set. Re-set is accomplished by turning power switch to
‘off’ for 10 seconds and then turning back on. When the tank water temperature exceeds
the thermostat set point, the burner will shut off until the next call for heat.
The internal circulating pump will operate whenever the thermostat is calling for heat. The
combustion air blower operates continuously whenever the ‘on-off’ switch is on.
The operating temperature control is factory-set and is not to be user-adjusted. If
temperature rise is not satisfactory, call your service agency and/or call the factory.