User manual APPLIED ENERGY LWSS

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Manual abstract: user guide APPLIED ENERGY LWSS

Detailed instructions for use are in the User's Guide.

[. . . ] If multiple bath filling or showering is required, mains feed may need to be 32mm MDPE or 28mm copper. The unit operates at 3 bar and pressures from 2 bar upwards are suitable. A flow rate of 20 litres per minute is a minimum requirement for single bath applications and must rise proportionately for greater demands. 1 Please also take into account any fitting that could restrict flow such as water meters, softeners etc. Connection to the unit ­ Use 22mm compression for all connections. [. . . ] · Maximum resistance allowed for a straight length of 28mm pipe (D2) from a G1/2 temperature relief valve equates to 18m. 28mm elbows at 1. 0m each = 4. 0m · Therefore the maximum permitted length equates to 14m. · As the actual length is 7m, a 28mm (D2) copper pipe will be satisfactory INSTALLATION HOT WATER OUTLETS Dynamic pressure always drops across a system when more than one outlet is opened. 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. 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. 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. The twin immersion heaters supplied with direct units can be switched to utilise low tariff electricity supply. Immersion heaters fitted are designed for domestic use only, either utilising low tariff electricity and occasional boost or for switched periods during the day. 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. For modified Danfoss Randall Y, S and W plan systems when used in conjunction with unvented water storage systems. Programmers recommended are: FP715 (7, 5 and 2 day programming and the CP15 5, 2 and 24 hour programming. W PLAN Diverting Valve HS3D BR BL G/Y Room Stat RMT 230 4 1 2 Cylinder Stat ITD Dual Stat C 1 2 Power Supply E N L High Limit Stat ITD Dual Stat C 2 1 2 3 4 5 6 7 8 9 10 Junction Box L 2 N E Pump 1 2 2 L L N N 4 3 L L N N 3 E E 3 8 G BR 2 BL 7 O Htg Dhw On On HP22 2 Port Valve FP75 or CP15 Programmer Basic Boiler 8 WIRING INSTALLATION The wiring diagram for Danfoss systems is given as guidance. For modified Danfoss Randall Y, S and W plan systems when used in conjunction with unvented water storage systems. The charge should be checked with an accurate pressure gauge and maintained at 3. 0 bar. If the reading is less than 3. 0 bar to recharge the vessel ensure that the unit is decommissioned by turning off the water supply and opening hot tap. Open the pressure and temperature relief valve to drain water from the top of the unit then close this valve. Leaving the hot tap open and the main supply off, pump the vessel using a schraeder valve connector via a footpump or motorised pump to 3. 0 bar. Remove pump, open mains supply and close hot tap once water is running freely. If the pressure remains over 3 bar, re-calibrate the Pressure Reducing Valve and clean the strainer, replacing if necessary. [. . . ] WHAT IS THE BOILER RETURN TEMPERATURE WHEN CYLINDER/STORE IS SATISFIED?Sealed Cold Open BAR BAR o o IF SEALED THEN WHAT IS THE CHARGE PRESSURE OF EXPANSION VESSEL? C C BOILER PRIMARY SETTINGS IS THE VENT PIPE CORRECTLY INSTALLED?YES NO METRES o C ALL MAINS PRESSURE SYSTEMS WHAT IS INCOMING COLD WATER PRESSURE?YES YES BAR NO NO UNVENTED SYSTEMS ONLY ARE T&P AND EXPANSION VALVES FITTED AND DISCHARGE TESTED? [. . . ]

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