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Checks and procedures before the initial startup of the boiler system.
Step-by-step guide for the initial ignition of G100/GTA boilers without electric heaters.
Procedure for initial ignition of G100/GTA boilers for DHW service only, no electric heater.
Procedure for initial ignition of G100/GTA boilers for DHW service with electric heater.
Initial ignition steps for G100IE/GTA boilers for dual service, without electric heater.
Initial ignition of G100IE/GTA boilers with time clock for dual service, no electric heater.
Checks and procedures before the initial startup of the boiler system.
Step-by-step guide for the initial ignition of G100/GTA boilers without electric heaters.
Procedure for initial ignition of G100/GTA boilers for DHW service only, no electric heater.
Procedure for initial ignition of G100/GTA boilers for DHW service with electric heater.
Initial ignition steps for G100IE/GTA boilers for dual service, without electric heater.
Initial ignition of G100IE/GTA boilers with time clock for dual service, no electric heater.
The Roca G100, G100 IE, G100/GTA, and G100IE/GTA series are floor-standing boilers designed for heating and, in GTA versions, for domestic hot water (DHW) production. These devices are intended for installation by qualified professionals and are compliant with European Directives on Electromagnetic Compatibility, Gas Appliances, Low Voltage, and Efficiency.
The primary function of these boilers is to provide central heating for residential or commercial spaces. The GTA (G100/GTA and G100IE/GTA) versions integrate a storage cylinder for domestic hot water, offering a dual service of heating and hot water supply. The G100IE and G100IE/GTA models feature fully automatic spark ignition for the burners, enhancing ease of use and efficiency.
The boilers operate by burning gas (Natural Gas, LPG, or Town Gas, depending on the model and configuration) to heat water, which is then circulated through a heating system (e.g., radiators). For GTA versions, a portion of this heated water can also be used to heat the integrated storage cylinder, providing on-demand hot water.
Safety is a key aspect of the design. The boilers incorporate a safety system that detects inadequate evacuation of flue gases. This system includes a thermostat that triggers a shutdown of the gas valve if overheated flue gases are detected passing through the draught diverter. This mechanism prevents the accumulation of dangerous combustion products. Manual resetting of this thermostat is required after a safety shutdown.
The electrical data for these boilers varies slightly by model. G100 and G100IE models typically operate at 220-230V - 50Hz 10W, while G100/GTA and G100IE/GTA models require 220-230V - 50Hz 90W. The maximum nominal electrical output for all models is 2.800 W.
The nominal heat output (Potencia útil nominal) ranges significantly across the series, from 20.300 kcal/h (23.6 kW) for the G100/20 to 108.300 kcal/h (126 kW) for the G100/110. Efficiency (Rendimiento útil) is consistently high, generally above 90%, reaching up to 91.6% for larger models like the G100/110. The number of heating elements (Nº de elementos) varies from 3 to 12, while all models are equipped with 3 burners (Nº de quemadores).
The boilers are designed for specific gas types, including Natural Gas (G20, G25), Butane (G30), Propane (G31), and Town Gas (G110). Injector diameters and diaphragm sizes are specified for each gas type and model, ensuring optimal combustion. For instance, a G100/20 using Natural Gas (G20) has a burner injector diameter of 2.3 mm, while using Propane (G31) it is 1.53 mm. Pilot burner injector diameters are also specified, e.g., 2 x 0.29 mm for Natural Gas/LPG and 2 x 0.55 mm for Town Gas.
Maximum working pressure for the G100 boilers is 4 bar. For the heating circuit of G100/GTA models, the maximum working pressure is 3 bar, and for the sanitary circuit, it is 7 bar. The maximum working temperature is 95°C. The specific flow rate for DHW (G100/GTA models) is 24 l/min for a Δt = 30 K.
GTA versions include an integrated storage cylinder with capacities ranging from 150 liters. These cylinders are equipped with an optional electric heater element of 2.500 W. The approximate weight of GTA models ranges from 236 kg to 291 kg.
Dimensions vary by model. For example, a G100/20 & G100/20 IE has a height (A) of 850 mm and a width (B) of 800 mm, while a G100/110 & G100/110 IE measures 1005 mm in height and 1659 mm in width. The flue socket collar (D) also varies, from 127 mm to 254 mm, with specific external diameter limits for chimney connection.
Installation requires careful attention to current regulations regarding access for future maintenance and servicing. A 220/230V-50 Hz earthed power point, water supply, and drain must be available near the installation site. It is recommended to install a non-thermosiphonic valve in the heating flow pipe to prevent unwanted radiator warming.
For G100/70-90-110 and G100/70-90-110IE boilers, outdoor installation (protected) or in a separate, well-ventilated room is required. GTA models need sufficient space at the back for water connections and cylinder casing assembly.
The lighting process involves several steps:
Stopping the boiler typically involves turning off the main On/off switch. For some models, specific procedures for closing the gas inlet cock or pressing a lever may be required to extinguish the pilot flame.
Regular maintenance is crucial for the safe and efficient operation of these boilers. The manual emphasizes that only original parts from the manufacturer should be used for replacements.
Gas Type Conversion: Changing the gas type (e.g., from Town Gas to Natural Gas, or Natural Gas to LPG/Butane) must be carried out by a qualified professional. This involves replacing the burner injectors and, for some models, the pilot injector and diaphragm. After conversion, the valve pressure governor must be sealed, and a label indicating the new gas type must be affixed.
Safety System Reset: If the flue limit thermostat triggers a shutdown, it must be manually reset after rectifying the cause of the inadequate flue gas evacuation. This safety device should never be bypassed or removed.
Water Quality: Recommendations for system water quality include a pH between 7.5 and 8.5, and hardness between 8 and 12 French degrees (1 French degree = 1 gram of calcium carbonate per 100 liters of water). If water needs to be added to the system, it should only be done when the boiler is completely cold.
Frost Protection: In areas prone to frost, an anti-freeze product should be added to the system water in appropriate proportions.
Noise Reduction: To minimize noise, several measures can be taken: insulating the pump and boiler, laying pipes with vibration isolation stays/mounts, re-sizing pipes, and limiting the number of elbows and non-insulated built-in pipes.
The design allows for accessibility to internal components for servicing. For example, the top and front casing panels can be removed for maintenance. The control panel is designed to be easily accessible for adjustments and checks.
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