The Thetford Hob 900 Series is a range of gas and electric cooking appliances designed for use in various settings, including caravans, campers, boats, and holiday homes. This installation manual covers models SHB910, SHB922, SHB923, SHB931, SHB932, and SHB969.
Function Description
The Thetford Hob 900 Series functions as a cooking hob, providing burners for preparing meals. These appliances are designed for permanent installation in a worktop and are suitable for use with LPG (liquefied petroleum gas). The hobs are available in different configurations, including models with two or three burners, catering to various cooking needs and space constraints.
Important Technical Specifications
The technical specifications vary slightly across the different models in the 900 Series. Here's a summary of key specifications:
Burner Specifications:
- SHB910 (Option 1): Gas input 1.5 kW (108 g/hr), Injector 0.61 mm.
- SHB910 (Option 2): Gas input 2.4 kW (173 g/hr), Injector 0.77 mm.
- SHB922: Gas input 2 x 1.5 kW (2 x 108 g/hr), Injector 0.61 mm. Total gas input 3.0 kW (216 g/hr).
- SHB923: Gas input 2 x 1.5 kW (2 x 108 g/hr), Injector 0.61 mm. Total gas input 3.0 kW (216 g/hr).
- SHB931: Gas input 1 x 2.4 kW (1 x 173 g/hr), 1 x 1.5 kW (1 x 108 g/hr), 1 x 1.0 kW (1 x 72 g/hr). Injectors 0.77 mm, 0.61 mm, 0.52 mm respectively. Total gas input 4.9 kW (353 g/hr).
- SHB932: Gas input 2 x 1.5 kW (2 x 108 g/hr), 1 x 1.0 kW (1 x 72 g/hr). Injectors 0.61 mm, 0.52 mm respectively. Total gas input 4.0 kW (288 g/hr).
- SHB969: Gas input 1 x 2.4 kW (1 x 173 g/hr), 2 x 1.5 kW (2 x 108 g/hr). Injectors 0.77 mm, 0.61 mm respectively. Total gas input 5.4 kW (389 g/hr).
Dimensions and Weight:
- SHB910: H 95 mm, W 355 mm, D 305 mm. Appliance weight 5.5 kg.
- SHB922: H 95 mm, W 500 mm, D 305 mm. Appliance weight 5.5 kg.
- SHB923: H 95 mm, W 295 mm, D 470 mm. Appliance weight 3.7 kg.
- SHB931: H 95 mm, W 770 mm, D 350 mm. Appliance weight 7 kg.
- SHB932: H 95 mm, W 544 mm, D 314 mm. Appliance weight 5 kg.
- SHB969: H 95 mm, W 494 mm, D 426.5 mm. Appliance weight 7 kg.
Spark Ignition: All models feature 12 V DC spark ignition.
Gas Category:
- CAT I3+ (28-30/37) for Butane 28-30 mbar and Propane 37 mbar.
- CAT I3 B/P (30) for Butane 30 mbar and Propane 30 mbar.
Installation Clearances:
- Minimum distance between the edge of the burner and the side: 200 mm.
- Minimum distance between the edge of the burner and the rear: 200 mm.
- Minimum distance between burners and overhanging parts: 500 mm.
- An air gap of at least 30 mm must be provided under the unit (A).
- A ventilation gap of 8 x 100 mm must be provided (B).
- For models with a glass lid, the distance from the edge of the burner to the rear wall can be reduced to 110 mm.
Usage Features
The Thetford Hob 900 Series is designed for straightforward operation and safety.
- Gas Connection: Connects to an 8 mm gas inlet. Only metal gas pipes compliant with EN1949 should be used. Rubber tubing is not recommended.
- Electrical Connection: The spark ignition system is powered by a 12 V DC battery, using appropriate connectors.
- Burner Flame: The burners use a fixed air/fuel mixture. Propane flames are blue-green with no yellow tip. Butane flames have yellow tips, and the yellow color increases slightly as the burner heats up.
- Safety Regulations: Users must ensure adequate air supply for combustion and proper removal of combustion products to prevent accumulation of unburnt gases. The appliance must be installed in accordance with national and European regulations.
Maintenance Features
Proper maintenance is crucial for the longevity and safe operation of the Thetford Hob 900 Series.
- After Installation Checks:
- All packaging materials must be removed.
- A warning label must be affixed next to the unit, meeting EN721, Annex A requirements.
- A warning notice regarding gas dispersal hole obstruction must be affixed.
- All gas piping and connections must be checked for leaks.
- Gas pressure must be checked; it should not rise or fall by more than 2.5 mbar relative to the nominal value.
- Servicing: All servicing must be carried out by a qualified and competent person. Before any service work, the appliance must be disconnected from both the gas and electrical supply. After each service, the appliance must be checked for gas soundness and electrical safety.
- Customer Service: For questions or service, customers should contact their local authorized service center, providing the model and serial number from the data badge. The Thetford website (www.thetford.com) provides contact information for customer service in various countries.
- Cleaning: The manual emphasizes maintaining minimum distances between burners and sides, rear, and overhanging parts, which implies that regular cleaning of these areas is expected to ensure proper ventilation and prevent material damage.
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