Daikin VKM50GMV1 Installation Manual

Contents

Daikin VKM50GMV1 Installation Manual Manual pdf 8 page image

6 English(4) Install the water supply piping. 〈〈〈〈VKM-GMV1 series only〉〉〉〉CAUTIONWhen installing the water supply piping, wash the pipes withtap water so that all dirt is removed from them or install adrain valve somewhere along the piping and drain the pipesthoroughly until the water flowing through them is clear.Make sure no cutting oils or detergents get into the pipes.• Connect the water supply piping with strainer (acces-sory), other pipings and valves (locally procured) to theindoor unit as shown in the figure at below.[PRECAUTION]• When installing the water supply piping, do not pass pip-ing in front of the maintenance cover, as this will make itimpossible to remove the humidifier element.• Include the water supply piping with strainer (included), awater supply shut-off valve, and a drain valve (both locallyprocured) somewhere along the water supply piping thatcan be reached from the inspection hole.• It is impossible to connect the water supply piping directlyto public piping. Use a cistern tank (of the approved type)if you need to get your water supply from public piping.• When using copper piping for the water supply connec-tions, replace the included half-union joints.(Refer to Fig. 9)• Use two spanners when attaching or removing pipes tothe half-union joints.• Secure the water supply piping without applying pressure[PRECAUTIONS]• Use pure water (city water, tap water or equivalent) thatsatisfies the standard regulated by the law of each coun-try for water supply to the humidifier when performinganti-sweat work.• Dirty water may cause valves to clog, dirt to accumulatein water tanks, and resulting in poor humidifier perfor-mance. (Never use water from a cooling tower or warmwater for heating.)• Make sure the supply water is between 5°C and 40°C intemperature and 0.02MPa to 0.49MPa (0.2kg/cm 2to5kg/cm2) in pressure. Include a pressure release valvebetween the humidifier and the strainer if the water pres-sure will be higher than this range.• Use city water or clean water and take steps to preventcondensation from forming.• Also, if the supply water is hard water, use a water soft-ener because of short life.∗ Life of humidifying element is about 3 years (4,000hours), under the supply water conditions of hardness:150mg/l.(Life of humidifying element is about 1 year (1,500hours), under the supply water conditions of hardness:400mg/l.)Annual operating hours: 10 hours / day × 26 days /month × 5 month = 1,300 hours(5) Insulate all piping that passes indoors.After checking that the water supply piping connections do noleak, insulate them using the included insulation as shown inFig. 10. (Tighten both edges with clamping material.)(Refer to Fig. 10)• Wrap the water supply piping with insulation to prevent con-densation from forming.• In areas where freezing may occur, always take steps to pre-vent the pipes from freezing.7 REFRIGERANT PIPING WORK〈〈〈〈For refrigerant piping of outdoor units, see the installationmanual attached to the outdoor unit.〉〉〉〉〈〈〈〈Execute heat insulation work completely on both sides ofthe gas piping and the liquid piping. Otherwise, a waterleakage can result sometimes.Use insulation that can withstand temperatures of at least120°C. Improve insulation of refrigerant piping accordingto the installation environment. Condensation may form onthe surface of the insulation.〉〉〉〉〈〈〈〈Before refrigerant piping work, check the type of R410Arefrigerant is used. (Proper operation is not possible if thetypes of refrigerant are not the same.)〉〉〉〉CAUTIONThis product must use a new refrigerant (R410A).Obey the following items.• Use a pipe cutter and flare suitable for the type ofrefrigerant (R410A).• Apply ester oil or ether oil around the flare portionsbefore connectioning.• Only use the flare nuts included with the unit. Usingdifferent flare nuts may cause the refrigerant to leak.• To prevent dust, moisuture or other foreign matterfrom infiltrating the tube, either pinch the end orcover it with tape.• Do not allow anything other than the designatedrefrigerant to get mixed into the refrigerant circuit,such as air, etc. If any refrigerant gas leaks whileworking on the unit, ventilate the room thoroughlyright away.• The outdoor unit is charged with refrigerant.• Be sure to use both a spanner and torque wrench together,as shown in the drawing, when connecting or disconnectingpipes to the unit. (Refer to Fig. 11)• Refer to the “Table 1” for the dimensions of flare nut spaces.Water supply pipingwith strainerWater supply shut-offvalveWater supply pipe(Locally procured) (Locally procured)(Locally procured)(Locally procured)(accessory)CapDrain valveFlare nutCopper pipingY-shapedstrainerRemoveExchange the included half-union jointUnitside(accessory) (accessory)Half-union jointReplacement of joints when using copper connectionsWatersupplypipingsideFig. 9ClampInsulation(for water supply piping)(accessory)(accessory) Fig. 10