User manual APPLIED ENERGY LWSS

[. . . ] R LWSS STAINLESS STEEL UNVENTED WATER STORAGE HEATER INSTALLATION COMMISSIONING MAINTENANCE THIS UNIT IS SUPPLIED BY APPLIED ENERGY PRODUCTS LTD TEL: 08709 000430 APPLIED ENERGY PRODUCTS LTD STAINLESS STEEL UNVENTED HOT WATER STORAGE UNITS Please read the following carefully before installation of the product. You should be competent to install the unvented system as defined by the regulations. Special attention must be paid to maintenance and service. Please keep the unit packaged until you are ready to commence installation. [. . . ] The unit has a working pressure of 3 bar. Good system design should take this into consideration & pipe sizing should be in line with current good practice. In hard water areas a reduced operating temperature will help to prevent premature scaling. EXPANSION VESSEL The vessel (supplied loose) screws onto the top of the unit. It is sized appropriately and includes some allowance for pipework. Check the charge is at 3. 0 bar before commissioning. The expansion vessel can also be fitted remotely between the unit and the check valve on the cold supply or by adaptor to the top female fitting on the cylinder. PRIMARY CIRCUITS The maximum primary pressure is 3. 5 bar. The boiler must have a mechanical high-limit thermostat. Solid fuel boilers cannot be used If the primary circuit is sealed, an additional expansion vessel must be fitted. If a secondary circuit is connected an additional expansion vessel may be required. 6 ELECTRICAL CONNECTIONS Immersion heaters are rated 3kw at 240v (2. 76kw at 230v), incolloy elements, with a thermal energy cutout, and must be connected via double pole switches with a 3mm contact gap separation. Appropriate wiring for the electrical load must be used. The twin immersion heaters supplied with direct units can be switched to utilise low tariff electricity supply. Do not switch on until the unit is full of water. Immersion heaters are supplied fitted in the body of the unit. Always ensure that the joints are watertight on commissioning. Order replacements using reference number on page 14. Do not fit an immersion heater without a high limit thermostat. Immersion heaters fitted are designed for domestic use only, either utilising low tariff electricity and occasional boost or for switched periods during the day. Immersion heaters must meet BS EN 60730-2-1. The fuse rating for 6kw loading is 25 amps, for the 3kw (indirect) model the fuse rating is 13 amps. ALWAYS CONSULT THE REGULATIONS! INDIRECT INSTALLATIONS The indirect pattern products are supplied with dual thermostats with sensing probes and with a motorised two port valve. The thermostat has to be wired in order to control the water temperature in the system and, if the high limit is tripped, to operate the two port valve in such a way as to route primary water back to the boiler and isolate the cylinder (see diagram). NB: By-pass must be fitted in accordance with boiler manufacturer's instructions BOILER CIRCS 22mm 2 PORT VALVE 7 WIRING INSTALLATION The wiring diagram for Danfoss systems is given as guidance. [. . . ] COMMENTS SIGNATURE SERVICE 7 DATE ENGINEER NAME COMPANY NAME TEL No. COMMENTS SIGNATURE SERVICE 8 DATE ENGINEER NAME COMPANY NAME TEL No. COMMENTS SIGNATURE WHEN ALL OF THE ABOVE SERVICE HAVE BEEN COMPLETED, PLEASE CONTACT YOUR SERVICE ENGINEER FOR AN ADDITIONAL SERVICE INTERVAL RECORD SHEET. COMMISSIONING PROCEDURE INFORMATION BOILER PRIMARY SETTINGS IS THE PRIMARY SEALED OR OPEN VENTED SYSTEM?IF SEALED THEN WHAT IS THE SYSTEM PRESSURE? [. . . ]