PT-200 TANKLESS GAS BOOSTER HEATER
SPECIFICATIONS
Type: Gas instantaneous tankless, power vented water heater designed as dishwasher booster heater for conveyor type dish machines. Capable of a continuous flow of approximately
480 GPH @ 40°F temperature rise or 274 GPH @ 70°F rise. Full gas modulation temperature control. The PT-200 is equivalent to a 47 KW electric booster.
Dimensions: 29.75" Wide x 15.25" Deep x 30.5" High. Weight: 105lbs
Hook-ups: Electric Junction Box
Flue, 4"top accessible
Gas, brass 3/4" NPT, bottom accessible.
Water, 3/4" NPT back accessible
Capacity: 199,000 Btu input  - 160,000 Btu output at maximum burn at 3.2 WCI manifold pressure.
70,000 Btu input - 56,000 Btu output @ low burn@ 2" WCI manifold pressure.
10,000 Btu input at ignition.
These manifold pressures are with Natural Gas.
Maximum 70°F rise @ 274 GPH or 40°F rise @ 480 GPH
Input Water Temperature: 110° - 140° F to maintain 180°F rinse temperature.
Installation: 6" NSF legs standard for floor installation. Wall bracket Option mounting recommended.
Flue: 4" with variable speed power vent. Can be installed as closed combustion unit, drawing combustion air from outside via 4" pipe.
Construction: Modular - Three assemblies - gas, electronics and water.
Burner - High primary air, 25 element, atmospheric type aluminized steel body with stainless flame strips.
Heat exchanger - copper fin tube type with wrap for cooling.
Electronics - plug in, works-in-a-drawer.
Case inside mounting assemblies are 304 stainless. NSF approved components.
Fuel: Natural Gas @ 3.5 WCI, Propane @ 11 WCI
Power: 115 VAC @ 4 Amps with 12 VDC power supply for ignition and controls. 24 VDC to operate mod valve.
Flue Gas Temperatures: Under 300° F.
Pressure Relief Valve 125 PSI
Set Temperature: Factory set @ 185° F or 145°F. Can be specified or field adjusted for special applications.
Gas Train: Burner: 25 element high primary air, atmospheric type with stainless steel flame strips. Steel manifold with brass 1/8" NPT pressure tap.

Modulating valve. Solid brass conduit with 3/4" NPT ends.
Control is non-intrusive into gas cavity, using no seals push rods or diaphragms. There is an up to 3:1 gas flow ratio controlled by a magnetic field actuating movement of a poppet in and out of a fixed orifice.

Gas Valve. Redundant solenoid with integral two stage regulator and 1/8" NPT pressure tap.
Water Assembly: Heat exchanger: Solid copper, fin tube type @ 6 fins per inch with copper combustion chamber with 5/8" tube wrap to cool assembly.
Pressure Relief Valve. Approved set @ 125 PSI.
Other hardware in contact with water is brass or NSF approved composites.
Flow Meter: Rotor type magnetic with Hall sensor mounted in inlet water line senses rate of water flow.
Controls: Microprocessor, controlling ignition, flame proofing, safety systems and electronic gas modulation temperature control. Control boards are mounted in a removable drawer, coated and with plug-in connectors protected by an anti-oxidant compound.

Ignition: Electronic, direct spark type.

Flame proofing: Rectification, shutting gas valve off in .8 second if proofing fails. Ignition & proofing effected by single stainless probe at the burner.

Temperature sensors: Two thermistors: one senses water temperature midway through heat exchanger (mounted in stainless probe with compression fitting on heat exchanger), and one senses outlet temperature, (mounted to hot water outlet on heat exchanger).

Temperature Control: Motorola microprocessor based gas modulation that maintains output water temperature within:2° F.
Safety Features: The PT-200 is pilotless.
Flame rectification. Gas valve shuts off in .8 of a second if there is a flame outage.
Redundant gas solenoid.
Electronic high temperature shut-off (two).
ECO high temperature shut off @ 210°F with manual reset.
Pressure relief valve @ 125 PSI.
PT-200 Operation: When unit is powered on the microprocessor activates the gas modulation valve and performs component diagnostics. The green LED will flash for normal operation, red will indicate a malfunction. The gas modulating valve will be set to its ignition value. If the temperature of the heat exchanger is below set temperature the spark ignition will be effected and the gas valve will open. Burner will ignite in low burn to maintain set temperature and then turn off.

When flow meter senses flow of rinse cycle, the burner ignites The microprocessor now reads water flow and temperature, sets the gas modulation valve to the proper setting. The water temperature is then monitored by the flow meter, thermistors midway and at the outlet of the heat exchanger to make any minor corrections in gas flow. If there is any change in incoming water flow or temperature, the microprocessor recalculates and makes any required adjustments.

The burner continues to operate as long as there is flow and then turns off. During this time, when water temperature is to within 10°F of set temperature, burner is modulated down until set temperature is reached and shuts off the burner. The modulation optimizes efficiency and eliminates rapid burner cycling in high burn

Approvals:

U.S. - ANSI Z21.10.3
Canadian - CAN 1-4.3-M85
Sanitation - NSF 5 - 1992

REV. 5/07