Installation Manual
Contents
1. Deterioration of copper pipe and heat insulator Cautions for using existing pipe Do not reuse a flare nut to prevent gas leaks Replace it with the supplied flare nut and then process it to a flare Blow nitrogen gas or use an appropriate means to keep the inside of the pipe clean If discolored oil or much residue is discharged wash the pipe Check welds if any on the pipe for gas leaks When the pipe corresponds to any of the following do not use it Install a new pipe instead The pipe has been opened disconnected from Hydro unit or outdoor unit for a long period The pipe has been connected to an outdoor unit that does not use refrigerant R22 R410A or R407C The existing pipe must have a wall thickness equal to or larger than the following thicknesses Reference outside diameter mm Wall thickness mm 9 5 0 8 15 9 1 0 19 0 1 0 Do not use any pipe with a wall thickness less than these thicknesses due to insufficient pressure capacity Installation Manual B Recovering refrigerant e Use refrigerant recovery switch SW801 on the P C board of the outdoor unit to recover refrigerant when the Hydro or outdoor unit is moved e Before recovering the refrigerant in the existing system perform a cooling operation for at least 30 minutes Procedure 1 Drain off the water in the Hydro unit or turn on the water pump manually See operation check mode 2 Turn2. After the airtight test is completed evacuate the nitrogen gas B Air purge With respect to the preservation of the terrestrial environment adopt Vacuum pump to purge air Evacuate air in the connecting pipes when installing the unit Do not discharge the refrigerant gas to the atmosphere to preserve the terrestrial environment e Use a vacuum pump to discharge the air nitrogen etc that remains in the set If air remains the capacity may decrease For the vacuum pump be sure to use one with a backflow preventer so that the oil in the pump does not backflow into the pipe of the air to water heat pump when the pump stops If oil in the vacuum pump is put in an air to water heat pump including R410A it may cause trouble with the refrigeration cycle Compound pressure gauge 101 kPa N 76 cmHg a Handle Low Pressure gauge Pd Gauge manifold valve Handle High Keep fully closed Charge hose For R410A only Charge hose For R410A only Vacuum pump adapter for counter flow prevention For R410A only Charge port Valve core Setting pin Packed valve at gas side Installation Manual Vacuum pump As shown in the figure connect the charge hose after the manifold valve is closed completely y Attach the connecting port of the charge hose with a projection to push the valve core setting pin to the charge port of the set y Open Handle Low fu
3. WEEE going to final disposal The crossed out wheeled bin symbol X that is affixed to the product means that this product falls under the Directive The user is responsible for returning the product to the appropriate collection facility as specified by your municipality or the distributor In case of a new product installation it may be possible to have the distributor pick up old WEEE directly The producer importer and distributor of the product are responsible for collection and treatment of waste either directly or through a collective system The list of our distributor in each country is shown below In case of a violation of the Directive sanctions are set in each country We are in general following the CECED interpretation and consider the WEEE applicable to Portable units Dehumidifiers WRACs Window Room air to water heat pumps Split Systems up to 12 kW plug in refrigerators and freezers Nevertheless there may be differences among member state laws In case country laws exclude some products from WEEE scope country law must be followed and WEEE obligations do not have to be followed for products that fall out of country low scope This directive does not apply to products sold outside European Community In case the product is sold outside the EU WEEE obligations do not have to be followed while compliance with local regulations must be ensured For additional information please contact the municipal facility
4. If the leaked refrigerant gas comes in contact with fire noxious gas may generate After the installation work confirm that refrigerant gas does not leak If refrigerant gas leaks into the room and flows near a fire source such as a cooking range noxious gas might generate Electrical work must be performed by a qualified electrician in accordance with the Installation Manual Make sure the Air to Water Heat Pump uses a dedicated power supply An insufficient power supply capacity or inappropriate installation may cause fire Use the specified wires for wiring connect the terminals securely fix To prevent external forces applied to the terminals from affecting the terminals Air to Water Heat Pump Installation Manual When the Air to Water Heat Pump cannot cool or heat water well contact the dealer from whom you purchased the Air to Water Heat Pump as refrigerant leakage is considered as the cause In the case of repair that requires refill of refrigerant ask service personnel about details of the repair The refrigerant used in the Air to Water Heat Pump is harmless Generally the refrigerant does not leak However if the refrigerant leaks in a room and a heater or stove burner in the room catches fire it may generate toxic gas When you ask service personnel for repairing refrigerant leakage confirm that the leakage portion has been completely repaired Conform to the regulations of the local electric company when wiring the powe
5. Outer dia of copper pipe Tightening torque 9 5 mm diam 33 to 42 3 3 to 4 2 kgfem 68 to 82 6 8 to 8 2 kgf m 15 9 mm diam Cover Piping valve Tightened Flare nut Valve at gas side 15 EN Installation Manual CAUTION 1 Do not put the crescent wrench on the cap or cover The valve may break 2 If applying excessive torque the nut may break according to some installation conditions NO GOOD Cover e After the installation work be sure to check for gas leaks of the pipe connections with nitrogen Pressure of R410A is higher than that of R22 Approx 1 6 times Therefore using a torque wrench tighten the flare pipe connecting sections that connect the indoor outdoor units at the specified tightening torque Incomplete connections may cause not only a gas leak but also trouble with the refrigeration cycle Do not apply refrigerating machine oil to the flared surface E Refrigerant pipe length Refrigeration pipe H max 30 m above below L max 30 m min 5 m 30 m chargeless Hydro Unit Outdoor unit Y 30 m chargeless 15 Air to Water Heat Pump 6 Air purging E Airtight test Before starting an airtight test further tighten the spindle valves on the gas side and liquid side Pressurize the pipe with nitrogen gas charged from the service port to the design pressure 4 15 MPa to conduct the airtight test
6. The copper pipe gauge is useful for adjusting the projection margin size Piping necessary to change the flare nut machining size due to pipe compression Vv Flare nut width H and flare matching size A Flare nut width H mm 7 E Copper pipe oda 26 4 29 5 212 7 15 9 D19 0 H For R410A 17 22 26 29 36 Same For R22 Same as above 24 27 as above Flare machining size A pte y ll Copperpipe 56 4 g9 5 912 7 815 9 B19 0 outer dia For R410A 9 1 13 2 16 6 19 7 24 0 For R22 9 0 13 0 16 2 19 4 23 3 Becomes a little larger for R410A Do not apply refrigerator oil to the flare surface 14 14 EN Air to Water Heat Pump E Tightening of connecting part 1 Align the centers of the connecting pipes and fully tighten the flare nut with your fingers Then fix the nut with a wrench as shown in the figure and tighten it with a torque wrench Half union or packed valve Flare nut eb Externally Internally threaded threaded side side Fix with wrench Tighten with torque wrench 2 As shown in the figure be sure to use two wrenches to loosen or tighten the flare nut of the valve on the gas side If you use a single crescent the flare nut cannot be tightened to the required tightening torque On the other hand use a single crescent to loosen or tighten the flare nut of the valve on the liquid side Unit Nem
7. sensor error Suction TS sensor error Heat sink TH sensor error Outdoor temperature sensor TE TS connection error o ol NI O aj 2 O N gt Outdoor EEPROM error o Compressor breakdown Compressor lock N Current detection circuit error oO Thermostat for compressor activated A Model data not set on the service P C board k al MCU MCU communication error o Discharge temperature error N Abnormal power open phase detected or abnormal voltage A 00 Heat sink overheat co Gas leak detected N o 0 0 00 00 00 OO OO OO Or O O O O 00 0 00 00000000 OO O O OF OO OF OF CO CO OC OC OF OF OF OF O OOOO O O O O O OF CO OC CO 0 00 0000 0000 JE JE JE JE JE JE JK JK JE JE JK JK JE JE JEJEJEJE O O O O O O O OO 00600 O O O O OO OO Oo Oo 00000000000 0000000 000 0000000 00 000000 00 000 0000 Oje JE 0000000000000 00000000 4 way valve reverse error 23 EN 23 Air to Water Heat Pump Installation Manual Display mode 1 Display mode 2 No Cause D800 D801 D802 D803 D804 D800 D801 D802 D803 D804 21 High pressure release operation O O oO O 0 0 22 Outdoor fan motor error O 1Oo oO 0O 0O 0O 0 23 Compr
8. drying R22 Conventional tools Flare tool Flare machining of pipes Usable if dimensions are adjusted Bender Bending pipes R22 Conventional tools Refrigerant recovery equipment Refrigerant recovery For R410A only Torque wrench Tightening flare nuts Exclusive for 12 7 mm and 15 9 mm Pipe cutter Cutting pipes R22 Conventional tools linger machine and nitrogen Welding pipes R22 Conventional tools Refrigerant charging measure Charging refrigerant R22 Conventional tools 8 EN Air to Water Heat Pump B Installation location CAUTION Install the outdoor unit in a location that meets the following conditions after the customer s consent is obtained e A well ventilated location free from obstacles near the air intakes and air discharge A location that is not exposed to rain or direct sunlight A location that does not increase the operating noise or vibration of the outdoor unit A location that does not produce any drainage problems from discharged water Do not install the outdoor unit in the following locations A location with a saline atmosphere coastal area or one that is full of sulfide gas hot spring area Special maintenance is required e A location subject to oil vapor oily smoke or corrosive gases e A location in which organic solvent is used e Alocation where high frequency equipment including inverter equipment private power generator medical equi
9. on the power of the air to water heat pump 3 Set SW804 on the P C board of the outdoor unit to all OFF and then press SW801 for 1 second or more The air to water heat pump enters the forced cooling mode for up to 10 minutes Operate or handle the valve to recover refrigerant during this time period 4 Upon completion of refrigerant recovery close the valve and press SW801 for at least 1 second to stop operation 5 Turn off the power Operation check mode 1 Preparation 1 Turn all of the remote controllers OFF for the hot water supply and heating 2 Turn off the hydro unit and the outdoor unit 3 Remove the front panel of the hydro unit 4 Set SW06_2 ON 2 Operation check 1 Turn on the hydro unit and the outdoor unit 2 Rotate switch DIP SWO1 to position 1 and press tactile switch SWO7 for 5 sec or longer 3 Rotating the rotary SW01 to position 16 The pump P1 will start 4 Set the DIP SW06_02 OFF to finish E bbe a SWw801 Refrigerant recovery switch SW801 DANGER Be careful of electric shock because the P C board has an electrical current running through it 22 22 EN Air to Water Heat Pump Installation Manual 14 Troubleshooting You can perform fault diagnosis of the outdoor unit with the LEDs on the P C board of the outdoor unit in addition to using the check codes displayed on the wired r
10. 04H8 E Model HWS 804H E 1104H E 1404H E 1104H8R E 1404H8R E 1604H8R E 220 230 V 380 400 V 3N Power supply 50 Hz 50 Hz Maximum running current 19 2 A 22 8 A 14 6 A Recommended field fuse 20 A 25 A 16 A Power sunniy wire 3 x 2 5 mm or more 5 x 2 5 mm or more PPly HO7 RN F or 60245 IEC 66 HO7 RN F or 60245 IEC 66 Hydro outdoor connecting wires 4 x 1 5 mm or more y 9 HO7 RN F or 60245 IEC 66 Number of wire x wire size 19 Air to Water Heat Pump How to wire 1 Connect the system interconnection wire to the terminal as identified with their respective numbers on the terminal block of the Hydro and outdoor units HO7 RN F or 60245 IEC 66 1 5 mm or more 2 When connecting the system interconnection wire to the outdoor unit terminal prevent water from coming into the outdoor unit 3 Insulate the unsheathed cords conductors with electrical insulation tape Process them so that they do not touch any electrical or metal parts 4 For interconnecting wires do not use a wire joined to another on the way Use wires long enough to cover the entire length N CAUTION e An installation fuse must be used for the power supply line of this air to water heat pump e Incorrect incomplete wiring may lead to an electrical fire or smoke e Prepare a dedicated power supply for the air to water heat pump e This product can be connected to the mains power Fixed wire connections A switch that disconnec
11. D Bottom plate of outdoor unit Foundation Support the bottom surface of the fixing leg that is in contact with and underneath the bottom plate of the outdoor unit NO GOOD If only the end of the fixing leg is supported it may deform N Foundation Do not support the outdoor unit only with the fixing leg Set the out margin of the anchor bolt to 15 mm or less 15 or less e When water is to be drained through the drain hose attach the following drain nipple and waterproof rubber cap and use the drain hose Inner diam 16 mm sold on the market Also seal knockout hole and the screws securely with silicone material etc to prevent water from leaking Some conditions may cause dewing or dripping of water 12 EN 13 EN Air to Water Heat Pump e When collectively draining discharged water completely use a drain pan Ge ED E Waterproof rubber cap Drain nipple Drain nipple Waterproof rubber cap Knockout hole B For reference If a heating operation is to be continuously performed for a long time under the condition that the outdoor temperature is O C or lower draining defrosted water may be difficult due to the bottom plate freezing resulting in trouble with the cabinet or fan It is recommended to procure an anti freeze heater locally in order to safely install the air to water heat pump HWS H8R E Cord heater is installed For details con
12. I TOSHIBA ESTIRA Leading Innovation gt gt gt AIR TO WATER HEAT PUMP HFC Installation Manual Outdoor Unit Model name HWS 804H E HWS 1104H E HWS 1404H E HWS 1104H8 E HWS 1404H8 E HWS 1604H8 E HWS 1104H8R E HWS 1404H8R E HWS 1604H8R E 1 EN Air to Water Heat Pump Installation Manual Please read this Installation Manual carefully before installing the Air to Water Heat Pump e This Manual describes the installation method of the outdoor unit For installation of the hydro unit follow the Installation Manual attached to the hydro unit Original instruction ADOPTION OF NEW REFRIGERANT This Air to water heat pump is a new type that has adopted a new refrigerant HFC R410A instead of the conventional refrigerant R22 in order to prevent destruction of the ozone layer Y HWS 804H E HWS 1104H E HWS 1404H E Equipment complying with IEC 610003 12 YV HWS 1104H8 E HWS 1104H8R E HWS 1404H8 E HWS 1404H8R E HWS 1604H8 E HWS 1604H8R E This equipment complies with IEC 61000 3 12 provided that the short circuit power Ssc is greater than or equal to Ssc 1 at the interface point between the user s supply and the public system It is the responsibility of the installer or user of the equipment to ensure by consultation with the distribution network operator if necessary that the equipment is connected only to a supply with a short ci
13. disposal When any leakage of the contained fluorinated greenhouse gas is detected the leak shall be stopped and repaired as soon as possible Only qualified service personnel are allowed to access and service this product Any handling of the fluorinated greenhouse gas in this product such as when moving the product or recharging the gas shall comply under EC Regulation No 842 2006 on certain fluorinated greenhouse gases and any relevant local legislation Periodical inspections for refrigerant leaks may be required depending on European or local legislation Contact dealers installers etc for any questions 26 Installation Manual 26 EN Air to Water Heat Pump Installation Manual IMPORTANT INFORMATION AND WARNING READ BEFORE INSTALLING THE UNIT KEEP IN A SAFE PLACE THE INFORMATION IN THIS BOOKLET IS NEEDED FOR END OF LIFE DISPOSAL OR REUSE OF THE UNIT We are very sensitive to environment and welcome the 2002 96 EC Directive WEEE Waste Electrical and Electronic Equipment This product is compliant with EU directive 2002 96 EC It must be collected separately after its use is completed and cannot be disposed of as unsorted municipal waste The objectives of EU directive 2002 96 EC are to tackle the fast increasing waste stream of electrical and electronic equipment increase recycling of electric amp electronic equipment EEE and to limit the total quantity of waste EEE
14. e important items regarding safety Observe them without fail After the installation work perform a test run to check for any problem Follow the Owner s Manual to explain how to use and maintain the unit to the customer Turn off the main power supply switch or breaker before the unit maintenance Ask the customer to keep the Installation Manual together with the Owner s Manual ZN WARNING Ask an authorized dealer or qualified installation professional to install maintain the Air to Water Heat Pump Inappropriate installation may result in water leakage electric shock or fire Be sure to connect earth wire grounding work Incomplete grounding cause an electric shock Do not connect ground wires to gas pipes water pipes lightning rods or ground wires for telephone wires Turn off the main power supply switch or breaker before attempting any electrical work Make sure all power switches are off Failure to do so may cause electric shock Use an exclusive power circuit for the Air to Water Heat Pump Use the rated voltage Connect the system interconnection wire correctly If the system interconnection wire is connected in a wrong way electric parts may be damaged When moving the Air to Water Heat Pump for the installation into another place be very careful not to enter any gaseous matter other than the specified refrigerant into the refrigeration cycle If air or any other gas is mixed in the refrigerant the gas pressure i
15. e unit in an area where snowfalls may be heavy take steps to prevent the unit from being adversely affected by the fallen or accumulated snow e Either make the foundation higher or install a stand which is high enough to ensure that the unit will be above the fallen or accumulated snow and place the unit on it Attach a snow shield locally procured 10 11 EN Air to Water Heat Pump B Necessary space for installation Unit mm Obstacle at rear side Upper side is free 1 Single unit installation LELELLLLLL y O y 2 Obstacles on both right and left sides 150 or more The height of the obstacle should be lower than the height of the outdoor unit 200 or more al ye AT ye sa LS 1 4 150 or 300 or 300 or 300 or more more more more The height of the obstacle should be lower than the height of the outdoor unit Obstacle also above unit 5p 150 or Se more D ja Installation Manual Obstacle in front Above unit is free 1 Single unit installation Y D 59 o 7777777777 2 Serial installation of two or more units A 1 000 or more Obstacle also at the above unit 7 1 000 or more ra 1 000 or more Obstacles in both front and rear of unit Open above and to the right and left of the unit The height of an obstacle in both the front and rear of the unit should be lower than the height of the o
16. each E Refrigerant piping connection N CAUTION TAKE NOTE OF THESE 4 IMPORTANT POINTS BELOW FOR PIPING WORK 1 Keep dust and moisture away from inside the connecting pipes 2 Tightly connect the connection between pipes and the unit 3 Evacuate the air in the connecting pipes using a VACUUM PUMP 4 Check for gas leaks at connection points Piping connection Outer diam of R410A tool used ne aligo copper pipe FERVER R410A 9 5 wens 1 0 to 1 5 Oo U 15 9 Flaring diameter size A Unit mm TT Outer diam of copper pipe AB 9 5 13 2 15 9 19 7 Liquid side Outer diameter Thickness 09 5 mm 0 8 mm Gas side Outer diameter Thickness 15 9 mm 1 0 mm Flaring 1 Cut the pipe with a pipe cutter Be sure to remove burrs that may cause a gas leak 2 Insert a flare nut into the pipe and then flare the pipe Use the flare nuts supplied with the air to water heat pump or those for R410A Insert a flare nut into the pipe and flare the pipe As the flaring sizes of R410A differ from those of refrigerant R22 the flare tools newly manufactured for R410A are recommended However the conventional tools can be used by adjusting the projection margin of the copper pipe In case of flaring for R410A with the conventional flare tool pull the tool out approx 0 5 mm more than that for R22 to adjust it to the specified flare size
17. ects Shoes with additional protective toe cap Repair of outdoor unit Gloves to provide protection for electricians and from heat Warning Indications on the Air to water heat pump Unit Warning indication Description Disconnect all remote electric power supplies before servicing Disconnect all remote electric power supplies before servicing warne WARNING AN ELECTRICAL SHOCK HAZARD ELECTRICAL SHOCK HAZARD C wes WARNING EE Moving parts lovin arts Do galons unit with grille Do not operate unit with grille removed removed i Hee Seo Stop the unit before the servicing when removing this panel CAUTION AN Boinol touch me airinn Do not touch the aluminum fins of the unit CAUTION A High temperature parts High temperature parts You might get burned You might get burned when removing this panel fins of the unit Doing so may result in injury Doing so may result in injury BURST HAZARD E y Open the service valves before Open the service valves before the operation otherwise there might be the the operation otherwise there burst A BURST HAZARD might be the burst 4 4 EN 5 EN Ai r to Water Heat Pump Installation Manual 1 Precautions for safety Ensure that all Local National and International regulations are satisfied Read this Precautions for safety carefully before Installation The precautions described below include th
18. emote controller of the indoor unit Use the LEDs and check codes for various checks Details of the check codes displayed on the wired remote controller of the indoor unit are described in the Installation Manual of the Hydro unit Verifying current abnormal status 1 Check that DIP switch SW803 is set to OFF 2 Jot down the states of LED800 to LED804 Display mode 1 3 Press SW800 for at least 1 second The LED status changes to display mode 2 4 Check the code whose display mode 1 equals the LED states jotted down and display mode 2 equals the current flashing status of LED800 to LED804 from the following table to identify the cause Verifying an abnormal state in the past although the abnormal state no longer occurs 1 Set bit 1 of DIP switch SW803 to ON 2 Jot down the states of LED800 to LED804 Display mode 1 3 Press SW800 for at least 1 second The LED status changes to display mode 2 4 Find an error whose display mode 1 equals the LED states jotted down and display mode 2 equals the current flashing states of LED800 to LED804 from the following table to identify the error An outside air temperature TO sensor error can be checked only while it occurs Display mode 1 Display mode 2 D800 D801 D802 D803 D804 D800 D801 D802 D803 D804 z 9 Cause Normal Discharge TD sensor error Heat exchanger TE sensor error Heat exchanger TL sensor error Outside air temperature TO
19. essor driver short circuit protection OIOJO O O O O JO O O 24 Position detection circuit error in one line display OOI O0 OO 0 9 9 OQ 25 High pressure SW error OO O0 O0 1 10 SW801 _SW800 O Vv HWS 1104H8 E H8R E HWS 1404H8 E H8R E HWS 1604H8 E H8R E 804 SW805 it ALL 3 4 ON gygy EERE 12 3 4 SW O O O SW802 SW803 SW800 SW801 SW806 24 OFF O ON Flashing The LEDs and DIP switches are located on the lower left of the P C board of the outdoor unit Y HWS 804H E HWS 1104H E HWS 1404H E The LEDs and DIP switches are located at the lower left of the P C board of the outdoor unit Enlarged view of EDs Enlarged view of EDs 24 EN 25 EN Air to Water Heat Pump 1 5 Appendix B Work instructions The existing R22 and R407C piping can be reused for our digital inverter R410A product installations N WARNING Confirming the existence of scratches or dents on the existing pipes and confirming the reliability of the pipe strength are conventionally referred to the local site If the specified conditions can be cleared it is possible to update existing R22 and R407C pipes to those for R410A models Basic conditions needed to reuse e
20. f the compressor may deteriorate NOTE The above descriptions are results have been confirmed by our company and represent our views on our air to water heat pump but do not guarantee the use of the existing pipes of air to water heat pump that have adopted R410A in other companies 25 Air to Water Heat Pump Curing of pipes When removing and opening the Hydro or outdoor unit for a long time cure the pipes as follows e Otherwise rust may be generated when moisture or foreign matter due to condensation enters the pipes The rust cannot be removed by cleaning and new pipes are necessary Placement location Term Curing manner 1 month or more Pinching Outdoors Less than 1 month _ _ Pinching or taping Hydro Every time This product contains fluorinated greenhouse gases covered by the Kyoto Protocol Chemical Name of Gas R410A Global Warming Potential 1975 GWP of Gas CAUTION 1 2 Paste the enclosed refrigerant label adjacent to the charging and or recovering location Clearly write the charged refrigerant quantity on the refrigerant label using indelible ink Then place the included transparent protective sheet over the label to prevent the writing from rubbing off Prevent emission of the contained fluorinated greenhouse gas Ensure that the fluorinated greenhouse gas is never vented to the atmosphere during installation service or
21. harge port of the valve on the gas side during cooling Requirement for replenishing refrigerant Replenish liquid refrigerant When gaseous refrigerant is replenished the refrigerant composition varies which disables normal operation Adding additional refrigerant The refrigerant need not be reduced for a 30 meter or less refrigerant pipe 17 Air to Water Heat Pump Electrical work WARNING 1 Using the specified wires ensure that the wires are connected and fix wires securely so that the external tension to the wires does not affect the connecting part of the terminals Incomplete connection or fixation may cause a fire etc Be sure to connect the earth wire grounding work Incomplete grounding may lead to electric shock Do not connect ground wires to gas pipes water pipes lightning rods or ground wires for telephone wires 3 The appliance shall be installed in accordance with national wiring regulations Capacity shortages of the power circuit or an incomplete installation may cause an electric shock or fire CAUTION Wrong wiring may cause a burn out of some electrical parts Be sure to use the cord clamps attached to the product Do not damage or scratch the conductive core or inner insulator of the power and inter connecting wires when peeling them Use the power and inter connecting wires with specified thicknesses specified types and protective device
22. he or she is a person who has been trained in matters relating to electrical work on the air to water heat pump made by Toshiba Carrier Corporation or alternatively he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work The qualified installer who is allowed to do the refrigerant handling and piping work involved in installation relocation and removal has the qualifications pertaining to this refrigerant handling and piping work as stipulated by the local laws and regulations and he or she is a person who has been trained in matters relating to refrigerant handling and piping work on the air to water heat pump made by Toshiba Carrier Corporation or alternatively he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work The qualified installer who is allowed to work at heights has been trained in matters relating to working at heights with the air to water heat pump made by Toshiba Carrier Corporation or alternatively he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work Qualified installer The qualified service person is a person who installs repairs maintains relocates and removes the ai
23. i Cool AB St Venera SVR 9018 Beijer ECR Iberica S Finland Ruosilantie 14E Fl 00390 Helsinki Malta Spain Calle San Dalmacio 18 ES 280 21 Finland ABK AS Madrid Spain TFD SNC Brobekkveien 80 PB 64 Vollebekk Rue Aim e Cotton Parc Technoland Norway 0516 Oslo Sweden kyima AB SE 163 08 Sp nga France 2 allee Toscane Norway Sweden _ 69800 SAINT PRIEST Beijer Ref Polska Sp Zo o AIRCOND Kii i France Al Krakowska 22 Sekocin Nowy Kiimaanlagen Poland Handelsgesellshcaft m b H Beijer Ref Deutschland GmbH PL 05 090 Raszyn Hungary Haushamer Stra e 2 A 8054 Germany Ohmstr 4 85716 Unterschlei heim Poland Graz Seiersberg Germany Beijer ECR Iberica S Austria AHI CARRIER SOUTH EASTERN Portugal Calle San Dalmacio 18 ES 280 21 EUROPE S A Madrid Spain Greece 18 Kifisou Avenue 121 33 Peristeri Athens Greece The manufacturer reserves the right to change any product specifications without notice 27 EN 27 EF99807801
24. lemented locally eee ee 22 14 Troubleshooting sen end wae orana eed wek io wa Wandel 23 15 Appendix 2 2er aa e A A Boe ee aen 25 2 2 EN 3 EN Air to Water Heat Pump Installation Manual E Generic denomination air to water heat pump E Definition of qualified installer or qualified service person The air to water heat pump must be installed maintained repaired and removed by a qualified installer or qualified service person When any of these jobs is to be done ask a qualified installer or qualified service person to do them for you A qualified installer or qualified service person is an agent who has the qualifications and knowledge described in the table below Agent Qualifications and knowledge which the agent must have e The qualified installer is a person who installs maintains relocates and removes the air to water heat pumps made by Toshiba Carrier Corporation He or she has been trained to install maintain relocate and remove the air to water heat pump made by Toshiba Carrier Corporation or alternatively he or she has been instructed in such operations by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to these operations The qualified installer who is allowed to do the electrical work involved in installation relocation and removal has the qualifications pertaining to this electrical work as stipulated by the local laws and regulations and
25. lly y Turn ON the vacuum pump 1 y Loosen the flare nut of the packed valve Gas side a little to check that the air passes through 2 y Retighten the flare nut y Execute vacuuming until the compound pressure gauge indicates 101 kPa 76 cmHg 1 y Close Handle Low completely y Turn OFF the vacuum pump y Leave the vacuum pump as itis for 1 or 2 minutes and check that the indicator of the compound pressure gauge does not return y Open the valve stem or valve handle fully First at liquid side then gas side y Disconnect the charge hose from the charge port y Tighten the valve and caps of the charge port securely Use the vacuum pump vacuum pump adapter and gauge manifold correctly referring to the manuals supplied with each tool before using them Check that the vacuum pump oil is filled up to the specified line of the oil gauge When air is not charged check again whether the connecting port of the discharge hose which has a projection to push the valve core is firmly connected to the charge port 16 16 EN 17 EN Air to Water Heat Pump B How to open the valve Open or close the valve Liquid side Open the valve with a 4 mm hexagon wrench Gas side Valve unit Using a minus screwdriver turn it counterclockwise by 90 until it hits the s
26. n such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work The qualified service person who is allowed to work at heights has been trained in matters relating to working at heights with the air to water heat pump made by Toshiba Carrier Corporation or alternatively he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work Qualified service person Air to Water Heat Pump Installation Manual E Definition of protective gear When the air to water heat pump is to be transported installed maintained repaired or removed wear protective gloves and safety work clothing In addition to such normal protective gear wear the protective gear described below when undertaking the special work detailed in the table below Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury burns electric shocks and other injuries Work undertaken Protective gear worn Protective gloves All types of work Safety working clothing Gloves to provide protection for electricians and from heat Electrical related work Insulating shoes Clothing to provide protection from electric shock Work done at heights 50 cm or more Helmets for use in industry Transportation of heavy obj
27. n the refrigeration cycle becomes abnormally high and it may resultingly causes pipe burst and injuries on persons Do not modify this unit by removing any of the safety guards or by by passing any of the safety interlock switches After unpacking the unit examine it carefully if there are possible damage Do not install in a place that might increase the vibration of the unit To avoid personal injury with sharp edges be careful when handling parts Perform installation work properly according to the Installation Manual Inappropriate installation may result in water leakage electric shock or fire When the Air to Water Heat Pump hydro unit is installed in a small room provide appropriate measures to ensure that the concentration of refrigerant leakage occur in the room does not exceed the critical level Tighten the flare nut with a torque wrench in the specified manner Excessive tightening of the flare nut may cause a crack in the flare nut after a long period which may result in refrigerant leakage Wear heavy gloves during the installation work to avoid injury Install the Air to Water Heat Pump securely in a location where the base can sustain the weight adequately Perform the specified installation work to guard against an earthquake If the Air to Water Heat Pump is not installed appropriately accidents may occur due to the falling unit If refrigerant gas has leaked during the installation work ventilate the room immediately
28. pment and communication equipment is used Installation in such a location may cause malfunction of the air to water heat pump abnormal control or problems due to noise from such equipment e A location in which the discharged air of the outdoor unit blows against the window of a neighboring house A location where the operating noise of the outdoor unit is transmitted When the outdoor unit is installed in an elevated position be sure to secure its feet e A location in which drain water poses any problems 1 Install the outdoor unit in a location where the discharge air is not blocked 2 When an outdoor unit is installed in a location that is always exposed to strong winds like a coast or on the high stories of a building secure normal fan operation by using a duct or wind shield 3 When installing the outdoor unit in a location that is constantly exposed to strong winds such as on the upper stairs or rooftop of a building apply the windproofing measures referred to in the following examples Installation Manual 1 Install the unit so that its discharge port faces the wall of the building Keep a distance 500 mm or more between the unit and wall surface 500 mm X Consider the wind direction during the operational season of the Air to water Heat Pump and install the unit so that the discharge port is set at a right angle relative to the wind direction Strong wind Strong wind e When installing th
29. pump e The R410A refrigerant is more susceptible to impurities such as water oxide membranes oils and fats With the adoption of the new refrigerant the refrigerating oil has also been changed Be careful not to let water dust conventional refrigerant and or conventional refrigerating oil enter the refrigerating cycle of the new refrigerant air to water heat pump To prevent different refrigerant or refrigerating oil from becoming mixed the sizes of the charging port of the unit and the installation tool connection sections are different from those of the conventional refrigerant Accordingly the following exclusive tools are required for the new refrigerant R410A B Required tools equipment and precautions for use Prepare the tools and equipment listed in the following table before starting the installation work Newly prepared tools and equipment must be used exclusively Legend A Prepared newly Use for R410A only Do not use for refrigerant R22 or R407C etc Conventional tools equipment are available Tools equipment Use How to use tools equipment Gauge manifold Vacuuming charging refrigerant Prepared newly for R410A only Charging hose and operation check Prepared newly for R410A only Charging cylinder Carn not be used Rey Use the refrigerant charging measure Gas leak detector Gas leak check A Prepared newly Vacuum pump Vacuum drying Unusable Sea ncn backflow Vacuum
30. r to water heat pump made by Toshiba Carrier Corporation He or she has been trained to install repair maintain relocate and remove the air to water heat pump made by Toshiba Carrier Corporation or alternatively he or she has been instructed in such operations by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to these operations The qualified service person who is allowed to do the electrical work involved in installation repair relocation and removal has the qualifications pertaining to this electrical work as stipulated by the local laws and regulations and he or she is a person who has been trained in matters relating to electrical work on the air to water heat pump made by Toshiba Carrier Corporation or alternatively he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work e The qualified service person who is allowed to do the refrigerant handling and piping work involved in installation repair relocation and removal has the qualifications pertaining to this refrigerant handling and piping work as stipulated by the local laws and regulations and he or she is a person who has been trained in matters relating to refrigerant handling and piping work on the air to water heat pump made by Toshiba Carrier Corporation or alternatively he or she has been instructed i
31. r supply Inappropriate grounding may cause electric shock Do not install the Air to Water Heat Pump in a location subject to a risk of exposure to a combustible gas If a combustible gas leaks and stays around the unit a fire may occur Install the refrigerant pipe securely during the installation work before operating the Air to Water Heat Pump If the compressor is operated with the valve open and without the refrigerant pipe the compressor sucks air and the refrigeration cycle is overpressurized which may cause a burst or injury For the refrigerant recovery work collection of refrigerant from the pipe to the compressor stop the compressor before disconnecting the refrigerant pipe If the refrigerant pipe is disconnected while the compressor is working with the valve open the compressor sucks air and the refrigeration cycle is overpressurized which may cause a burst or injury N CAUTION New refrigerant air to water heat pump installation This air to water heat pump adopts the new HFC refrigerant R410A which does not destroy ozone layer The characteristics of R410A refrigerant are easy to absorb water oxidizing membrane or oil and its pressure is approx 1 6 times higher than that of refrigerant R22 Accompanied with the new refrigerant refrigerating oil has also been changed Therefore during installation work be sure that water dust former refrigerant or refrigerating oil does not enter the refrigerating cycle To p
32. r to water heat pump in the correct procedure as specified in the Owner s Manual Please refer to the Hydro unit installation manual for the detail of the test run Installation Manual 1 7 Annual maintenance For an air to water heat pump system that is operated on a regular basis cleaning and maintenance of the Hydro outdoor units are strongly recommended As a general rule if an Hydro unit is operated for about 8 hours daily the Hydro outdoor units will need to be cleaned at least once every 3 months This cleaning and maintenance should be carried out by a qualified service person Failure to clean the Hydro outdoor units regularly will result in poor performance icing water leaking and even compressor failure 12 Air to water heat pump operating conditions For proper performance operate the air to water heat pump under the following temperature conditions Cooling operation 10 C to 43 C 20 C to 25 C 20 C to 43 C Heating operation Hot water operation If air to water heat pump is used outside of the above conditions safety protection may work 21 Air to Water Heat Pump 1 3 Functions to be implemented locally B Handling existing pipe When using the existing pipe carefully check for the following e Wall thickness within the specified range Scratches and dents e Water oil dirt or dust in the pipe Flare looseness and leakage from welds
33. rcuit power Ssc greater than or equal to Ssc 1 Furthermore when similar equipment or other equipment which may cause harmonic current emissions are to be connected to the same interface point with this equipment to reduce the risk of possible problems which may be caused from addition of those harmonic current emissions it is recommended to make sure that the short circuit power Ssc at the interface point is greater than the sum of the minimum Ssc required by all the equipment which will be connected to the interface point Ssc 1 Model Ssc MVA HWS 1104H8 E HWS 1104H8R E 0 71 HWS 1404H8 E HWS 1404H8R E 0 71 HWS 1604H8 E HWS 1604H8R E 0 71 Air to Water Heat Pump Installation Manual Contents 1 Precautions for Salety erssnaaneersrrnananenserssswmenenden nnn dia 5 2 Accessory parts and refrigerant 0 00 c eee eee 7 3 Installation of new refrigerant air to water heat puMp ooooo o 8 4 Installation conditions oars ennen maen EEDE Bet ee koskaan 9 5 Refrigerant piping vs scores errar tetanus ida aes 13 6 Alf PUlQing ss isese sa nen eenden ee ee eee ee ee oe eee eee ee teas 16 7 Electrical WOM lt lt x srrisaas sees rra aa 18 8 BANG ss 2z ass ida e 21 9 Finishing sisse sad aldea aa 21 10 Test WN no 2 vern rn da a 21 11 Annual maintenance 0 00 e eee eee ee 21 12 Air to water heat pump operating CONditiONS o ooooooomoooo 21 13 Functions to be imp
34. revent charging an incorrect refrigerant and refrigerating oil the sizes of connecting sections of charging port of the main unit and installation tools are changed from those for the conventional refrigerant Accordingly the exclusive tools are required for the new refrigerant R410A For connecting pipes use new and clean piping designed for R410A and please care so that water or dust does not enter To disconnect the appliance from main power supply This appliance must be connected to the main power supply by means of a switch with a contact separation of at least 3 mm The installation fuse must be used for the power supply line of this unit 6 EN 7 EN Air to Water Heat Pump 2 Accessory parts and refrigerant B Accessory parts Part name Qty Shape Usage Hand this directly to the customer Outdoor unit installation manual 4 For other languages that do not appear in this Installation Manual please refer to the enclosed CD R EJ Drain nipple 1 ES Wal Waterproof rubber cap 5 Protective bush For protecting wires pipe cover Guard material for passage part For protecting passage part pipe cover Clamp filter gij For conforming to EMC standards Used for power wire HWS 1104H8 E 1104H8R E HWS 1404H8 E 1404H8R E HWS 1604H8 E 1604H8R E Installation Manual Air to Water Heat Pump Installation Manual 3 Installation of new refrigerant air to water heat
35. rovided clamp filter to the power supply wire in order to conform to EMC standards 20 EN Air to Water Heat Pump 8 Earthing Connect the earth wire properly following applicable technical standards Connecting the earth wire is essential to preventing electric shock and to reducing noise and electrical charges on the outdoor unit surface due to the high frequency wave generated by the frequency converter inverter in the outdoor unit If you touch the charged outdoor unit without an earth wire you may experience an electric shock 9 Finishing After the refrigerant pipe Hydro Outdoor connecting wires have been connected cover them with finishing tape and clamp them to the wall with off the shelf support brackets or their equivalent Keep the power wires and Hydro outdoor connecting wires off the valve on the gas side or pipes that have no heat insulator 1 OTest run Turn on the leakage breaker at least 12 hours before starting a test run to protect the compressor during startup e Check the following before starting a test run That all pipes are connected securely without leaks That the valve is open If the compressor is operated with the valve closed the outdoor unit will become overpressurized which may damage the compressor or other components If there is a leak at a connection air can be sucked in and the internal pressure further increases which may cause a burst or injury Operate the ai
36. s required Remove the panel and you can see electric parts on the front side A metal pipe can be installed through the hole for wiring If the hole size does not fit the wiring pipe to be used drill the hole again to an appropriate size Be sure to clamp the power wires and system interconnection wires with a banding band along the connecting pipe so that the wires do not touch the compressor or discharge pipe The compressor and the discharge pipe become hot Installation Manual Ensure all wires are secured using the cord clamps on the pipe valve fixing plate located inside the unit cI 18 Electrical control box Pipe valve fixing plate Cord clamp Panel 18 EN 19 EN Air to Water Heat Pump E Wiring between hydro unit and outdoor unit The dashed lines show on site wiring Installation Manual Connect the system interconnection wires to the identical terminal numbers on the terminal block of each unit Incorrect connection may cause a failure HWS 804H E HWS 1104H E HWS 1404H E Input power 220 230 V 50 Hz HWS 1104H8 E H8R E HWS 1404H8 E H8R E HWS 1604H8 E H8R E Input power 380 400 V 3N 50 Hz Outdoor unit Hydro unit Leakage breaker Outdoor unit Leakage breaker For the air to water heat pump connect a power wire with the following specifications 1104H8 E 1404H8 E 16
37. stallation Manual 4 When refrigerant cannot be recovered using a refrigerant recovery unit There is the possibility that a large quantity of dirty oil or moisture remains inside the pipes 5 When a commercially available dryer is attached to the existing pipes e There is the possibility that copper green rust has been generated 6 When the existing air to water heat pump is removed after refrigerant has been recovered Check if the oil is judged to be clearly different from normal oil The refrigerator oil is copper rust green in color There is the possibility that moisture has mixed with the oil and rust has been generated inside the pipe e There is discolored oil a large quantity of residue or a bad smell A large quantity of shiny metal dust or other wear residue can be seen in the refrigerant oil 7 When the air to water heat pump has a history of the compressor failing and being replaced When discolored oil a large quantity of residue shiny metal dust or other wear residue or mixture of foreign matter is observed trouble will occur 8 When temporary installation and removal of the air to water heat pump are repeated such as when leased etc 9 If the type of refrigerator oil of the existing air to water heat pump is other than the following oil Mineral oil Suniso Freol S MS Synthetic oil alkyl benzene HAB Barrel freeze ester series PVE only of ether series e The winding insulation o
38. tact the dealer Installation Manual 5 Refrigerant piping B Knockout of pipe cover Knockout procedure Rear direction Pipe cover gt Side direction Front direction al Down direction The indoor outdoor connecting pipes can be connected in 4 directions Take off the knockout part of the pipe cover through which pipes or wires will pass through the base plate Detach the pipe cover and tap on the knockout section a few times with the shank of a screwdriver A knockout hole can easily be punched After punching out the knockout hole remove burrs from the hole and then install the supplied protective bush and guard material around the passage hole to protect wires and pipes Be sure to attach the pipe covers after pipes have been connected Cut the slits under the pipe covers to facilitate the installation After connecting the pipes be sure to mount the pipe cover The pipe cover is easily mounted by cutting off the slit at the lower part of the pipe cover Be sure to wear heavy work gloves while working 13 Air to Water Heat Pump B Optional installation parts Locally procured Parts name Qty Refrigerant piping A Liquid side 09 5 mm Gas side 115 9 mm One each Installation Manual Projection margin in flaring B Unit mm B y MA Rigid Clutch type Pipe insulating material polyethylene foam 10 mm thick C Putty PVC tape One
39. the shop dealer installer that sold the product or the producer 0 Country Name of Company responsible for WEEE 0 2 0 0 0 e INTERCOOL Technics BV TOSHIBA CARRIER UK LTD AIRCOND Klimaanlagen Holland Nikkelstraat 39 Postbus 76 Toshiba Air Conditioning Handelsgesellshcaft m b H 2980 AB Ridderkerk UK United Technologies House Austria Haushamer Stra e 2 Netherlands A ceathemead A 8054 Graz Seiersberg TOSHIBA CARRIER UK LTD urrey Austria United Technologies House UNITED KINGDOM AHI CARRIER SOUTH EASTERN Ireland Guildford Road Leatherhead AIRCOND K imaanlagen EUROPE S A i i Surrey KT22 9UT Czech Handelsgesellshcaft m b H Cyprus 18 Kifisou Avenue 121 33 Peristeri UNITED KINGDOM Republic Haushamer Stra e 2 A 8054 Athens ECR Italy SpA oraz Selersberg Greece Italy Via Socrate 32 34 IT 20128 usima GIDEX A S Vinkelvej 4 8620 Milano Italy AIRCOND K imaanlagen Denmark Kjellerup OY Combi Cool AB andelsgeselishcall M D Denmark Latvia Ruosilantie 14E FI 00390 Helsinki Slovaka A GIDEX A S Korshoj 10 3600 Finland Austria j Denmark Frederikssund OY Combi Cool AB AIRCOND KI i Denmark Lithuania Ruosilantie 14E Fl 00390 Helsinki Handelsgese En OY Combi Cool AB al Fintand Slovenia Haushamer Stra e 2 A 8054 Estonia Ruosilantie 14E Fl 00390 Helsinki CUTRICO SERVICES LTD Graz Seiersberg Finland Malta Cutrico Building Old Railway Track Austria OY Comb
40. topper Full open Charge port Flare nut Handle position Closed completely Opened fully Movable part of valve Stem Main stopper e While the valve is fully opened after the screwdriver has reached the stopper do not apply torque exceeding 5 Nem Applying excessive torque may damage the valve Valve handling precautions e Open the valve stem until it strikes the stopper It is unnecessary to apply further force e Securely tighten the cap with a torque wrench Installation Manual Cap tightening torque The cap with the 9 5 mm outer diameter is available in two sizes in accordance with the type of packed valve for which the cap is used The tightening torque depends on the width across flats of the cap so check it in the table below 33 to 42 Nem 9 5 mm H22 mm 2 to 4 2 kgfm 14 to 18 Nem Valve size 1 4 to 1 8 kgf m 9 5 mm H19 mm 20 to 25 Nem 115 9 mm 2 0 to 2 5 kgfem 14 to 18 Nem Charge port 1 4 to 1 8 kgfem B Replenishing refrigerant This model is a 30 m chargeless type that does not need to have its refrigerant replenished for refrigerant pipes up to 30 m Refrigerant replenishing procedure 1 After vacuuming the refrigerant pipe close the valves and then charge the refrigerant while the air to water heat pump is not working 2 When the refrigerant cannot be charged to the specified amount charge the required amount of refrigerant from the c
41. ts all poles and has a contact separation of at least 3 mm must be incorporated in the fixed wiring W HWS 804H E HWS 1104H E HWS 1404H E To Hydro unit terminal block ade Up o Pod bod Pod L N S z Earth Power supply terminal block Pi Ive fixi System interconnection pise Yen Power supply wire wire 20 Installation Manual Stripping length power supply wire and system interconnection wire 10 O 2 hit 50 j die ai 30 40 mm Earth wire vm Earth wire Power supply System wire interconnection wire VW HWS 1104H8 E H8R E HWS 1404H8 E H8R E HWS 1604H8 E H8R E Hydro outdoor connecting wire Power supply wire gt alealala is sa a f Earth screw 4 U y l Earth screw oeeo Jd 9 DA is Cord clamp Cord clamp Clamp filter accessory Cord clamp Cord clamp Stripping length power supply wire and system interconnection wire 123010 1d RN ine 10 y 101 1 1 OH I Lod y 1 Y O So L 50 40 50 4o mm Earth wire Earth wire System interconnection wire Power supply wire N WARNING Be sure to attach the p
42. utdoor unit Standard installation 1 Single unit installation 150 or more a i q UA E e 1 000 or more 11 Air to Water Heat Pump 2 Serial installation of two or more units 200 or more y v v v 300 or EL 5 IL 300 or 5 more more SE gt ye gt I hat A A Serial installation in front and rear Open above and to the right and left of the unit The height of an obstacle in both the front and rear of the unit should be lower than the height of the outdoor unit Standard installation ef fo of a LL el h J L dle 1 000 or 300 or 1 500 or 2 000 or 200 or more more more more more B installation of outdoor unit Before installation check the strength and horizontalness of the base so that abnormal sounds do not emanate According to the following base diagram fix the base firmly with the anchor bolts Anchor bolt nut M10 x 4 pairs Drain hole Drain hole Drain nipple mounting hole 12 Installation Manual As shown in the figure below install the foundation and vibration proof rubber pads to directly support the bottom surface of the fixing leg that is in contact with and underneath the bottom plate of the outdoor unit When installing the foundation for an outdoor unit with downward piping consider the piping work GOOD Absorb vibration Fixing leg with vibration proof rubber pads Foundation GOO
43. xisting pipes Check and observe the presence of three conditions in the refrigerant piping works 1 Dry There is no moisture inside of the pipes 2 Clean There is no dust inside of the pipes 3 Tight There are no refrigerant leaks Restrictions for use of existing pipes In the following cases the existing pipes should not be reused as they are Clean the existing pipes or exchange them with new pipes 1 When a scratch or dent is heavy be sure to use new pipes for the refrigerant piping works 2 When the existing pipe thickness is thinner than the specified Pipe diameter and thickness be sure to use new pipes for the refrigerant piping works The operating pressure of R410A is high 1 6 times that of R22 and R407C If there is a scratch or dent on the pipe or a thinner pipe is used the pressure strength may be inadequate which may cause the pipe to break in the worst case Pipe diameter and thickness mm Pipe outer diameter 6 4 V9 5 O12 7 515 9 G 19 0 Thickness R410A 0 8 0 8 0 8 1 0 1 0 e Incase the pipe diameter is 12 7 mm or less and the thickness is 0 8 mm be sure to use new pipes for the refrigerant piping works 3 When the outdoor unit was left with the pipes disconnected or the gas leaked from the pipes and the pipes were not repaired and refilled e There is the possibility of rain water or air including moisture entering the pipe In
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