Daikin RZQG71L8V1B Installation Manual

Daikin RZQG71L8V1B Installation Manual Manual pdf 11 page image

RZQG71~140L + RZQSG100~140LSplit system air conditioners4P339538-1A – 2014.03Installation manual88.3. Selection of branch pipe8.4. Allowable pipe length and height differenceSee the table below concerning lengths and heights. Refer to figures2, 3, 4 and 5. Assume that the longest line in the figure correspondswith the actual longest pipe, and the highest unit in the figurecorresponds with the actual highest unit. For RZQG units onlyAllowable pipe length For RZQSG units onlyAllowable pipe length Existing or pre-installed piping can be used1. Piping must comply with the criteria below.• Pipe diameter must comply with the limitations as indicated inparagraph "8.2. Refrigerant pipe size" on page 7.• Piping length must be within limits of the allowable pipinglength as in paragraph "8.4. Allowable pipe length and heightdifference" on page 8.• Piping must be designed for R410A. See paragraph"8.1. Selection of piping material" on page 7.2. Piping can be reused without cleaning when:• Total 1-way piping length: <50 m.• No compressor breakdown has occurred in the history of theunit to be replaced.• A correct pump down operation can be executed:- Operate the unit continuously for 30 minutes in coolingmode.- Execute a pump down operation.- Remove the air conditioning units to be replaced.• Check the contamination inside the existing piping.If you cannot meet all these requirements, the existing pipesmust be cleaned or replaced after removing the air conditioningunits to be replaced.3. Prepare the flare connections for higher pressure. Seeparagraph "10.3. Cautions for necessity of a trap" on page 12.RZQ(S)G71~140_Y1 +FCQG35~71F/FCQHG71FTwin KHRQ22M20TA KHRQ58TTriple KHRQ127H KHRQ58HDouble twin KHRQ22M20TA (3x) KHRQ58T (3x)Allowable pipe lengthLiquid pipesizeModel71 100 125 140Maximum total one-way piping length(a)(a) Parenthesized figure represents the equivalent length.Pair L1 size-down 10 m (10 m)standard 50 m(70 m) 75 m (90 m)size-up 25 m(35 m) 35 m (45 m)• Twin and triple• Double twin• L1+L2• L1+L2+L4size-down 15 m (10 m)standard 50 m(70 m) 75 m (90 m)size-up 25 m(35 m) 35 m (45 m)Minimum total one-way piping lengthAll L1+L2+L3+L4+L5+L6+L7 — 3 m(b)(b) When piping length is less than 5 m, a complete recharging of the unit isrequired. See paragraph "Total charging weight of the refrigerant (after aleak, etc.)" on page 15.Maximum allowable piping lengthTwin L1+L2+L3—60 m75 m75 mTriple L1+L2+L3+L4 —Double twin L1+L2+L3+L4+L5+L6+L7—Maximum branch piping length• Twin and triple• Double twin• L2• L2+L4 — 20 mMaximum difference between branch lengthsTwin L2–L3—10 m 10 m10 mTriple L2–L4 —Double twin • L2–L3• L4–L5• L6–L7• (L2+L4)–(L3+L7)—Maximum height between indoor and outdoorAll H1 — 30 mMaximum height between indoorsTwin, triple anddouble twinH2 — 0.5 mChargeless lengthAll L1+L2+L3+L4+L5+L6+L7size-down ≤10 mstandard ≤30 msize-up ≤15 mAllowable pipe lengthLiquid pipesizeModel100 125 140Maximum total one-way piping length(a)(a) Parenthesized figure represents the equivalent length.Pair L1 size-down 10 m (10 m)standard 50 m (70 m)size-up 25 m (35 m)• Twin and triple• Double twin• L1+L2• L1+L2+L4size-down 10 m (10 m)standard 50 m (70 m)size-up 25 m (35 m)Minimum total one-way piping lengthAll L1+L2+L3+L4+L5+L6+L7 — 5 mMaximum allowable piping lengthTwin L1+L2+L3—50 m50 mTriple L1+L2+L3+L4Double twin L1+L2+L3+L4+L5+L6+L7 —Maximum branch piping length• Twin and triple• Double twin• L2• L2+L4 — 20 mMaximum difference between branch lengthsTwin L2–L3—10 m10 mTriple L2–L4Double twin • L2–L3• L4–L5• L6–L7• (L2+L4)–(L3+L7)—Maximum height between indoor and outdoorAll H1 — 30 mMaximum height between indoorsTwin, triple anddouble twinH2 — 0.5 mChargeless lengthAll L1+L2+L3+L4+L5+L6+L7 size-down ≤10 mstandard ≤30 msize-up ≤15 m