User manual TOSHIBA HWS-1501CSHM3 INSTALLATION MANUAL

[. . . ] AIR TO WATER HEAT PUMP SYSTEM HOT WATER CYLINDER INDIRECT HEATING METHOD CLOSED OUTLET (UNVENTED) INSTALLATION AND SERVICE MANUAL HWS-1501CSHM3-UK HWS-2101CSHM3-UK HWS-3001CSHM3-UK 36006030_Issue_D 1 INSTALLATION AND SERVICING INSTRUCTIONS, FOR AIR TO WATER HEAT PUMP SYSTEM WATER CYLINDER. PLEASE LEAVE THIS MANUAL WITH THE UNIT FOR FUTURE REFERENCE. CONTENTS SECTION 1 2 3 4 5 6 7 8 9 CONTENT INTRODUCTION . . PAGE 2 3 4 9 9 10 11 13 14 GENERAL REQUIREMENTS INSTALLATION - GENERAL INSTALLATION ­ INDIRECT UNITS COMMISSIONING MAINTENANCE . . FAULT FINDING AND SERVICING USER INSTRUCTIONS GUARANTEE . [. . . ] The thermal cut-out must not be bypassed in any circumstances. 5. 0 COMMISSIONING Warning: Water that is left standing in a stainless steel water cylinder for long periods without draw off will become de-oxygenated and potentially corrode the vessel material. If the installation is to be left unused following installation and commissioning the water cylinder should be drained or regularly (once per week) flushed through with fresh mains water. 5. 1 FILLING THE UNIT WITH WATER · Check Expansion Vessel pre-charge pressure. The vessel is supplied pre-charged to 0. 35MPa (3. 5 bar) to match the control pressure of the Pressure Reducing Valve. The pre-charge pressure is checked using a car tyre gauge by unscrewing the plastic cap opposite the water connection. · Check all connections for tightness including the cylinder heater. An cylinder heater key spanner is supplied for this purpose. · Ensure the drain cock is CLOSED. · Open a hot tap furthest from the water cylinder. · Open the mains stop cock to fill the unit. When water flows from the tap, allow to run for a few minutes to thoroughly flush through any residue, dirt or swarf, then close the tap. · Open successive hot taps to purge the system of air. 5. 2 SYSTEM CHECKS · Check all water connections for leaks and rectify as necessary. · Remove the Pressure Reducing Valve headwork to access the strainer mesh, clean and re-fit. · Manually open, for a few seconds, each relief valve in turn, checking that water is discharged and runs freely through the tundish and out at the discharge point. · Ensure that the valve(s) reseat satisfactorily. 5. 3 PRIMARY CIRCUIT Fill the primary circuit following the procedure detailed in the Hydro Unit Installation Manual. Vent any trapped air by opening the air bleed point or automatic air vent. Ensure the water cylinder is full of water before switching on the Air to Water heat pump System. Switch on the electrical supply to the heat pump and ensure the programmer is set to HOT WATER mode. Check that any motorised valves or primary pumps are working and allow the unit to heat. 9 TERMINAL BRACKET RESET BUTTON LOCATED ON THIS FACE THERMAL CUTOUT 6. 3 STRAINER Turn off the cold water supply, air to water heat pump system and cylinder heater. The lowest hot water tap should then be opened to de-pressurise the system. [. . . ] DO NOT bypass the thermal cut-out in any circumstances. 8. 3 FLOW PERFORMANCE When initially opening hot outlets a small surge in flow may be noticed as pressures stabilize. This is quite normal with unvented systems. In some areas cloudiness may be noticed in the hot water. [. . . ]