Primo HE - Manual

TABLE OF CONTENTS 1.

TABLE OF CONTENTS 1. THE BENCHMARK SCHEME Page 2 2. GENERAL INFORMATION Page 3 2.1 Guarantee Page 3 2,2 How the Appliance Works Page 3 2.3 Delivery Page 4 3. INSTALLATION Page 5 3.1 Water Regulations Page 5 3.2 Building Regulations Page 5 3.3 General Guidance Page 5 3.4 Cold Water Supply Page 5 3.6 Siting and Fixing Page 6 3.7 Overall Dimensions Page 7 3.8 Connection of Mains Supply Page 8 3.9 Cold Water Combination Valve Page 11 3.10 Connection to Services Page 14 3.11 Secondary Return Page 14 3.12 Discharge Pipework Page 14 3.13 Electrical Connection Page 17 3.14 Electrical Diagrams Page 19 4. COMMISSIONING Page 24 5. MAINTENANCE Page 26 5.1 ProTech Anti-corrosion System Page 26 5.2 Thermal Cut-out(s) Page 26 5.3 Immersion Heater(s) Page 26 5.4 Unvented Controls Page 26 5.5 Thermostats Page 27 5.6 Maintenance Page 27 6. FAULT FINDING Page 29 7. TECHNICAL INFORMATION Page 30 8. BENCHMARK COMMISSIONING CHECKLIST Page 34 9. BENCHMARK SERVICE RECORD Page 35 1. The Benchmark Scheme Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the correct equipment for their needs, that is installed, commissioned and serviced in accordance with the manufacturer’s instructions by competent persons and that it meets the requirements of the appropriate Building Regulations. The Benchmark Checklist can be used to demonstrate compliance with Building Regulations and should be provided to the customer for future reference. Installers are required to carry out installation, commissioning and servicing work in accordance with the Benchmark Code of Practice which is available from the Heatinmg and Hotwater Industry Council who manage and promote the Scheme. Visit www.centralheating.co.uk for more information. 2

2. GENERAL INFORMATION This manual is an integral and essential part of the product. It should be kept with the appliance so that it can be consulted by the user and/or authorised personnel. Please read carefully the instructions and notices about the appliance contained in this manual, as they provide important information regarding the safe installation, use and maintenance of the cylinder. Failure to do so may invalidate the guarantee. When installing and servicing the cylinder, Ariston ThermoUK Ltd recommend the use of protective clothing i.e. gloves. 2.1 GuArAntee The Ariston range of unvented cylinders come with varying guarantees depending on the model of cylinder. The guarantee periods offered with each model of cylinder are as follows: ST Range - 10 Years tank - 2 Years electrical components Classico HE Range - 5 Years tank - 2 Years electrical components Primo HE Range - 25 Years tank - 2 Years electrical components Note: The guarantee is subject to the cylinder being installed and serviced annually by a competent person as per the servicing instructions in Section 5.6 of this manual. For units with the ProTech anti-corrosion device it must be ensured that this is connected and operating correctly (green LED only). 2.2 How tHe AppliAnce works The immersion heater(s) are controlled through a thermostat which senses the water temperature. The operating temperature can be pre-set by adjusting the spindle in the head of the thermostat. In addition to the thermostat there is a thermal cut-out incorporated if the thermostat fails and the water temperature rises too high. Once the cut-out operates it can only be re-set manually after the fault has been rectified. Indirect models have dual thermal controls. In addition to the above there is a separate cylinder thermostat and thermal cut-out for controlling each indirect circuit. Again the thermal cut-out operates if the cylinder thermostat fails, by disconnecting the live feed (call for hot water) from the programmer. ITI/ITD/ITSI models have a stainless steel tank and therefore need no protection against corrosion. STD/STI models have an enamelled steel tank and therefore are supplied with magnesium anodes to prevent corrosion of the cylinder tank. It is imperative that the top anode is checked during the annual service and if found to be corroded both anodes should be replaced. Failure to do so could invalidate the warranty of the tank. The Wall-hung (ST) units utilise the ProTech anti-corrosion system (electronic anode). This prevents an electrolytic reaction between the tank and dissimilar metals. The ProTech system shows if it is operating correctly (green LED) or incorrectly (red LED). In the event that the red LED lights (even with the green light still showing), it is imperative that a service agent is contacted immediately as continued use with the ProTech system in this state could invalidate the warranty on the tank. The factory fitted temperature & pressure relief valve at the top of the cylinder is a safety device to back-up the thermostat(s) and thermal cutout(s). It works by sensing an excess in water temperature or pressure and 3