System Overview; Specifications; General - Hatco Powermite PMG-100 Manuel D'installation Et D'utilisation

SYSTEM OVERVIEW

Hatco Powermite Gas Booster Water Heaters are designed
to maintain a water temperature of 180°F (82°C) required for
the sanitizing rinse cycle of commercial dishmachines. An
inlet water temperature of at least 43°C (110°F) will produce
optimum results (See Water Temperature Recovery Table in
the SPECIFICATIONS section).
After the necessary power, water, and gas connections are
completed, start the unit by turning on the Power I/O (on/off)
switch located on the lower front base. The water circulating
pump will start at this time. Providing that operating and safety
controls are satisfied, the ignition module will begin a 20
second safety pre-purge. Next, it will energize the spark igniter
and turn on the gas for the pilot. The igniter will spark for about
90 seconds or until proof of a pilot fire. If there is a confirmed
pilot fire and the water temperature is below the setpoint, the
unit will go into full burn. The unit will stay in full burn until the
desired setpoint temperature is met, then the burner will shut
off. During standby periods of limited use, the burner will cycle
on only to replace standby water temperature loss. If for some
reason the unit did not ignite, there is an automatic five minute
delay before the unit attempts to ignite again.

SPECIFICATIONS

General

Type
Capacity
Fuel
Operating Water Pressure
Power
Ignition
Temperature Control
Safety Systems
Fluing
Vent
Water Circulating Pump
Connections
Shipping Weight
Gas-fired, instantaneous recirculating booster water heater with accumulator for use
with door-type dishmachines. Unit is floor mounted.
PMG-100: Input 105,000 BTUs/Hour. Output 84,800 BTUs/Hour = 24.8 kW
PMG-200: Input 195,000 BTUs/Hour. Output 156,000 BTUs/Hour = 45.7 kW
Natural Gas @ 5 inches water column (wc) — minimum inlet gas pressure
Propane @ 11 wc — minimum inlet gas pressure
150 pounds per square inch (psi) maximum (relief valve set at 150 psi), 210°F (99°C).
Supply 120 VAC, 15 amp service (unit uses 3.0 amps @ 120 volts).
Electronic spark pilot with flame proofing by rectification.
Electronic, temperature control probe/microprocessor based. Factory preset at 190°F
(88°C).
Energy cut off devices include manual reset heat exchanger high limit and
manually reset tank high limit. Redundant gas solenoid valve with integral regulator.
Temperature/Pressure relief valve on tank.
Direct — combustion air enters bottom, flue gases exit right side or back at top of unit
Forced draft system with 4" (102 mm) diameter vent pipe adapter (straight or 90°)
Recirculating with bronze housing.
Gas: 3/4" NPT
Water: 3/4" NPT
Electric: 120 VAC, 15 Amp
PMG-100: 180 pounds (82 kg) dry
PMG-200: 215 pounds (98 kg) dry
During operation, water enters the Booster Water Heater at the
inlet water connection and flows into the stainless steel tank. It
then is pumped through the finned tube heat exchanger where
it is heated to the proper temperature. The heated water then
returns back to the top half of the stainless steel tank for supply
to the dishmachine. Water that is not used immediately by the
dishmachine is recirculated through the heat exchanger by the
water circulating pump.
If the unit overheats above the setpoint temperature, the safety
high limit will open, shutting down the burner, locking out the
controller, and turning on the alarm pilot light. In order to reset
the unit, turn the unit off and depress the reset button on the
appropriate high limit switch, the tank high limit is located
behind front panel on the left hand side of the vertical control
panel. The heat exchanger high limit is located on the front
of the heat exchanger. The switches will not reset until the
temperature has dropped to a safe level. This unit must remain
off for at least 10 seconds before it can be restarted.
NOTA: The temperature control is factory preset at 88°C
(190°F).
NOTA: The water circulating pump will stay on as long as the
Power I/O (on/off) switch is in the I (on) position.
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English
PMG100200M-0222