The COPA Nixa12 Hermetic Water Heater is a high-efficiency appliance designed to provide domestic hot water. It is engineered for safe, efficient, and proper use, with a focus on user convenience and robust performance.

Function Description:

The Nixa12 Hermetic Water Heater is designed to heat water below boiling temperature at atmospheric pressure. It connects to a domestic water system and provides hot water on demand. Its hermetic design ensures safe operation by not utilizing ambient air for combustion, thereby preventing the risk of carbon monoxide poisoning in the living space. The appliance is equipped with a water-cooled stainless steel burner and a copper exchanger, contributing to its high efficiency and durability.

Important Technical Specifications:

Rated Heat Load (Min/Max): 10.0 / 23.5 kW
Rated Heat Power (Min/Max): 8.5 / 21.1 kW
Yield (Min/Max): 89.2 / 88.1 %
Natural Gas Consumption (Min/Max): 1.03 / 2.43 m³/h
NOx Class: 6 (37.7 mg/kWh), complying with ErP class 6 directive due to its water-cooled stainless steel burner.
Seasonal Efficiency Class: A (77%)
Hot Water Load Profile: L
Capacity (ΔT= 25 °C): 12 l/min
Minimum Water Flow: 3 l/min
Water Pressure (Max/Min): 8 bar / 0.5 bar
Water Temperature Adjustment Interval: 35-60°C
Sound Level: 48 dB
Electrical Protection Class: IPX4D
Electricity Consumption: 20-30 W (only 3W in standby)
Dimensions (WxHxD): 320x645x250 mm
Volume: 51.6 Liters
Net Weight: 15 kg
Gross Weight: 17 kg
Chimney Type: C12, C62 (Concentric Flue Connection Ø60/100 mm)
Operating Voltage Range: 185-250 V AC (220-230 V single-phase, grounded power supply)

Usage Features:

The Nixa12 features a user-friendly control panel with a digital LCD display and soft-touch knobs for ease of operation.

Digital LCD Display: Shows temperature values, parameter codes, and error codes. It has a ±1°C temperature adjustment sensitivity.
Water Temperature Setting: A dedicated knob allows users to adjust the domestic hot water (DHW) temperature.
ON/OFF NG/LPG Switch: A knob (POT1) controls the appliance's ON/OFF state. It also allows entry into the parameter menu for gas type selection (Natural Gas - nG or LPG - LG).
Quick Detection: A water flow turbine group and stainless filter enable rapid detection of hot water demand.
Wide Modulation Range: Offers comfortable operation with a modulation range from 21 kW down to 10 kW.
Superior Safety Systems: Provides protection against freezing, overheating, and voltage fluctuations, ensuring long-term safe use.
Troubleshooting System: Includes an easy-to-reset failure system, displaying error codes on the LCD for quick diagnosis.
Solar Energy Compatibility: Designed to be compatible with solar energy heating systems that utilize water tanks.
Flue Connection Flexibility: Supports up to 4 meters of flue distance in both vertical and horizontal planes.

Maintenance Features:

Durable Copper Exchanger: An oxygen-free copper exchanger ensures high performance and a long service life.
Annual Maintenance: Regular annual maintenance by an authorized service is highly recommended to ensure full performance and extend the appliance's lifespan, especially after the 3-year warranty period.
Error Code Display: The LCD displays specific error codes (e.g., F1 for safety thermostat error, F2 for return water sensor error, F3 for ionization component error, F4 for no gas, F5/F9 for pressurestat error, F6 for gas valve return, F7 for low voltage, F8 for abrupt ionization, GI/FO for gas valve modulation, FE for fan modulation) to assist in diagnosing and resolving issues. For errors requiring a reset, a RESET symbol is also displayed.
Authorized Service Requirement: Initial operation and any major interventions must be performed by a COPA Authorized Service to maintain warranty validity.
Voltage Regulator Recommendation: If the electrical network cannot consistently provide voltage within the 195-253 V range, a voltage regulator is recommended to protect the appliance.

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