Marine Tankless Water Heater Available up to 54kw

TEMPERATURE CONTROLLER

An electronic temperature controller with LED digital display. The temperature controller processes all flow and temperature data and calculates power input to meet demand.

OPERATOR CONTROL CAPABILITIES

• Power Limiting: Allows the operator to reduce the power consumption to provide flexibility and savings during installation and operations.
• Diagnostics: Display inlet and outlet temperatures, flow rate, and error codes to assist in troubleshooting.
• Cost Calculator: Determine the exact cost of operating the heater. Input your cost per kWh ·Hr, and the controller displays total kWh · Hrs consumed, total cost of operation, and total hot water usage (shown in gallons or liters).
• Temperature Control: Set the digital display to the desired water temperature in °F or °C.  Fully adjustable in 1° increments from 32-194°F (0-90°C). A user-adjustable +/- 3° calibration feature provides additional control for superior accuracy.

FULL HEATER MODULATION

Each heating element is switched on/off using a fast-acting solid-state triac with zero-crossing firing control. This switching schema provides full modulation of each heating element, regulating heat input to meet demand. To extend operating efficiency and component longevity, each triac is mounted on a heat sink attached to the incoming supply pipe. This allows the heat from the triac’s switching to dissipate into the water.

PROPER POWER INTEGRITY

All TWS tankless water heaters, including all 3-phase models, are engineered to operate as a balanced load and operate at 0.999 Power Factor. All TWS 3-phase models are designed for 3-wire (3 live, 1 ground) and 4-wire power systems and draw equal current across all conductors to maintain the power integrity of the user’s electrical system. TWS does not recommend the use of heaters that operate as an unbalanced load, as is common with staged heaters designed for star systems (3 live, 1 neutral, 1 ground). All load switching in TWS tankless models is performed as zero crossover, eliminating phase angle firing interference and associated EMI issues.

FULL RESOURCE STAGING

The TWS tankless control schema ensures that usage is equalized across all heating circuits. To achieve this, once the controller has calculated the kW required, it energizes all circuits in a staggered sequence. Each circuit is powered on independently and proportionally, with a slight time delay between each. This Full Resource Staging Schema reduces EMI output, increases component longevity, and provides highly accurate hot water temperatures. For three-phase models, all circuits are fully modulated and synchronized to operate as a balanced load.

BUILDING MANAGEMENT INTEGRATION

Remote Control: Ability to remotely enable or inhibit the heating operation of the unit using one of the following methods:

1. The supplied 24VDC signal is user-configured for either Inhibit Mode or Normal Operation Mode.
2. The supplied volt-free contact is user-configured for either Inhibit Mode or Normal Operation Mode.

Priority Control: An integrated SPDT potential-free dry contact (NO/NC 10A @ 240VAC) energizes when the unit is heating and de-energizes when not heating. This feature is helpful when users want to prioritize the water heater over another electrical load, ensuring both don’t operate simultaneously.