Introduction The following specification describes the Toshiba Estia Air to Water Heat Pump system(s) to be installed at the site below: (ADD SITE NAME) The system(s) shall consist of the following components. It shall be the responsibility of the nominated installer to supply and install these system components in accordance with Toshiba Installation Guidelines. 1) Toshiba Estia Inverter external air cooled condensing unit(s) 2) Toshiba Estia Hydro box indoor unit(s) 3) Toshiba Domestic Hot Water Cylinder(s) 4) Interconnecting refrigerant pipe work from Outdoor Unit(s) to HydroUnit(s). System Operating Range Mode of operation Cooling Heating DHW Max. Outdoor Air Temperature Min. Outdoor Air Temperature 0 C db 43 25 43 0 C db 10-20 -20 Min / Max Leaving Water Temperature 0 C 10 to 30 20 to 55 20 to 75 System Description The installation shall provide an energy efficient R410A Direct Expansion (DX) split type Air to Water Heat Pump system(s) and shall be installed in accordance with relevant codes of practice and regulations. The system(s) shall comprise of a Toshiba Estia Inverter Heat Pump outdoor unit(s) connected to a Toshiba Estia hydro module unit(s). It is recommended that the refrigerant system installing contractor is a Refcom Certified Toshiba Additions Member. Full details on our website: www.toshiba-aircon.co.uk. Customer Support. The system(s) shall be controlled with Toshiba s in-built controls system. DELETE WARRANTIES THAT DO NOT APPLY All equipment supplied shall have a manufacturer s warranty of at least 3-years on all parts and labour in accordance with Toshiba s warranty and installation guidelines. Equipment to be installed by a Toshiba Registered installer or Qualified or Accredited
All equipment supplied shall have a manufacturer s warranty of 5-years on all parts and labour in accordance with Toshiba s warranty and installation guidelines. Equipment to be installed by a Toshiba Qualified or Accredited installer. All equipment supplied shall have a manufacturer s warranty of 5-years on all parts and labour in accordance with Toshiba s warranty and installation guidelines. Equipment to be installed by a Toshiba Qualified or Accredited installer. All equipment supplied shall have a manufacturer s 7 year Total Peace of Mind (TPM) warranty on all parts and labour in accordance with Toshiba s warranty and installation guidelines. Equipment to be installed by a Toshiba Accredited (TPM) installer. Design Criteria The air conditioning system(s) shall be designed and equipment selected to conform to the design criteria below ensuring that the heating load is covered by the heat pump (with the additional back up heater if required) at the most extreme outdoor condition of its proposed operation. External Conditions Summer 29 C Winter -5 C Leaving water temp Summer 10 C Winter 45 C DHW temp Summer 10 C Winter 55 C System Specification The system(s) shall be of the Toshiba Estia Inverter Air to Water Heat Pump variety. The system will be capable of both heating and cooling. Each system will use non-ozone depleting HFC refrigerant R410A. The system shall allow a user-driven operating environment to be established where users can directly request their own choice of temperature and on/off control etc. The equipment must be suitable for operating on a 220-240 Volt, single-phase, 50 Hz supply. The back up heaters for the hydro module will be 220-240 Volt, single-phase, 50 Hz supply. The back up heaters for the hydro module will be 400 Volt, three-phase, 50 Hz supply. Outdoor Unit(s) Toshiba Model References Max Piping Length Max Lift Max Drop HWS-804H-E 30 m 30 m 30 m
HWS-1104H-E 30 m 30 m 30 m HWS-1404H-E 30 m 30 m 30 m HWS-1104H8-E* 30 m 30 m 30 m HWS-1404H8-E* 30 m 30 m 30 m HWS-1604H8-E* 30 m 30 m 30 m *Denotes Three Phase High Temperature Range HWS-P804H-E 30m 30m 30m HWS-P1104H-E 30m 30m 30m The outdoor unit shall be factory assembled, pre-wired, works tested, supplied with a refrigerant pre-charge suitable for 30m of main piping and complete with fully sealed pipe work connections. It shall not be necessary to include oil traps, sight glasses, or external driers. The access panel shall be easily removable for servicing. The condensing unit shall be fitted with its own electrical compartment with all necessary electrical and control components. The casing shall be manufactured from Galvatite steel plate with a Silky Shade (Munsell 1Y8.5-0.5) electrostatic spray finish protected to IP X4 and shall contain the following components: Inverter Driven Twin Rotary Compressor The compressor shall be of the twin rotary type and driven by a High-Speed Calculation Vector Control Inverter, creating seamless capacity control to match the connected indoor unit(s) cooling or heating demand. Fixed speed compressors of any type are not to be used. The compressor shall be factory mounted on springs and shock-absorbing rubber to minimise vibration. Heat Exchanger The heat exchanger shall be factory constructed of rifled copper tubing, mechanically bonded to aluminium fins. The aluminium fin material shall be coated with a hydrophilic coating to prevent corrosion and to assist condensate dispersal. The coil shall have a large surface area to minimize noise and maximise heat transfer. Fan and Motor Each outdoor unit is to be fitted with no more than a single fan. The fan shall be a three-blade, flash-wing, low noise type and shall be both dynamically and statically balanced to produce minimum noise and vibration. The fan shall be directly coupled and driven by a drip proof, permanently lubricated variable speed high-efficiency inverter controlled motor. The outdoor fan speed shall be matched automatically to the energy demands of the heat exchanger. The fan must be able to overcome an external static resistance of 15Pa. Suction Line Accumulator The cylindrical accumulator shall be fabricated from press formed mild steel plates. The accumulator shall have sufficient capacity to prevent any liquid refrigerant from flowing back into the compressor section. Additional Features & Safety Devices: 4-way reversing valve, solenoid valves, pulse-modulating valve, strainer, dryer, service valves with 5/16 gauge ports, thermal protection for compressor, recycling guard timer, over-current protection, compressor suction and discharge temperature sensors, terminals, internal wiring and controls. A pulse-modulating valve will provide capacity control by maintaining suction
temperatures of between 1 and 5 K higher than the evaporator inlet temperature additionally, the indoor heat exchanger will be limited to temperatures of no less than 2ºC when cooling. The outdoor unit will automatically defrost in the heating cycle. Indoor Unit Hydro Modules Each indoor unit shall be from Toshiba s Estia Inverter range of Air to water heat pumps and must operate on 220-240 Volt, single-phase, 50 Hz supply fed from the outdoor unit. For the electrical back up heaters the power supplies shall be 220-240 Volt, single-phase, 50 Hz supply (HWS-xxxXWHM3 models) or 400 Volt, three phase, 50Hz supply (HWSxxxXWHM6 & XWHM9 models) all fed from a dedicated supply to the hydro module. A separate 220-240 Volt, single-phase, 50 Hz supply shall be used to feed the DHW tank if used. The heat exchanger shall be made of high grade stainless steel and will be mounted inside the hydro unit. All hydro modules are provided with return water and leaving water temperature sensors. The heat exchanger will be protected against excessive temperatures both low and high. Hydro Module Toshiba Model References: HWS-804XWHM3-E HWS-804XWHT6-E HWS-1404XWHM3-E HWS-1404XWHT6-E HWS-1404XWHT9-E High Temperature Range HWS-P804XWHM3-E HWS-P804XWHT6-E HWS-P804XWHM9-E HWS-P1104XWHT3-E HWS-P1104XWHM6-E HWS-P1104XWHT9-E The unit will be manufactured from powder coating steel sheet enclosing the heat exchanger, main system primary pump, control electronics, expansion vessel and electrical back up heater. The hot water connections and refrigerant connections are to the bottom of the unit.
Domestic Hot Water Tanks Toshiba Model References: HWS-1501CSHM3-UK (150 litre nominal capacity) HWS-2101CSHM3-UK (210 litre nominal capacity) HWS-3001CSHM3-UK (300 litre nominal capacity) The tanks will be manufactured from powder coated stainless steel and be available in three sizes as above. Each tank will have its own 3kW electrical immersion heater, hot water sensor and controls to link it to the Toshiba hydro unit. Each tank will be supplied with cold water combination valve (to meet UK water regulations), factory fitted temperature / pressure relief valve, T&P valve insulation and housing, expansion vessel and mounting bracket, tundish, compression nuts and olives and heater key spanner. Refrigerant Pipe-Work All pipe-work shall be manufactured using de-oxidised, refrigerant quality copper to BS EN 1057:1996, and must be heat-treated as follows: 9.5mm (3/48 ) OD to 15.9mm (5/8 ) OD - Soft, Half Hard or Hard Tempered The length/height difference parameters and outside diameter of all piping is to be in accordance with the appropriate Toshiba manuals. Interconnecting controls Wiring The nominated installer shall be responsible for the following interconnecting controls wiring: 3-core & earth = Outdoor unit to Indoor Unit (1, 2, 3 & E) 3-core = DHW Tank to Indoor Unit (1, 2 & E) All electrical wiring, bonding and earthing shall be in accordance with the current edition of BS 7671: 2008 (IEE Wiring Regulations 17 th Edition). The voltages stated are EC harmonised voltages, but the equipment shall be suitable for 200-240 volts single phase. Controls The Toshiba Estia Air to Water Heat Pump(s) shall be complete with the Toshiba in-built hard wired controller, fitted to the front of the hydro unit.
The remote controller(s) shall be surface mounted and hard wired to the hydro unit(s) and will provide the user with local individual control of the hot water temperatures. The controller shall be manufactured in ABS plastic with a liquid crystal display (LCD). The controller shall enable the user to interrogate the system and display an alphanumeric fault code in the event of system malfunction. The controller shall have the capability of accessing all the system function codes for customising the settings and operation of the system. The controller shall be able to provide control or indicate status of the following functions: Start/stop. Operating mode (autocurve, cool, heat). Temperature set point 2 zone temperature control Test run (heating & cooling). Schedule 7 day timer operation (Operation time, start/stop, temp setting & restriction) Minimum and maximum temperature settings in each mode Auto-restart. Sensor data available from all associated indoor and outdoor units Night operation setting for noise and temperature set back Hot water boost function Frost protection DHW anti bacteria function