TEV marstair 55017006, Technical Manual, Page: 13 / 20

13 55908039-03
The equivalent lengths of all the fittings in a pipe run should be added together and the total added to the actual
pipe length in order to calculate the total equivalent length.
3. Use the shortest possible route, avoiding sharp bends.
4. Completely insulate the suction line, fully over the indoor unit drain tray.
USING SUCTION AND EXPANSION LINES
The expansion assembly must be removed from the indoor unit and connected to the outdoor unit allowing a pipe run
of up to 80m, including a maximum lift of 20m.
Fully insulate both the suction and expansion lines, including the expansion device: ensure the pipes are insulated
well over the drain tray at the indoor unit.
MODEL
MAXIMUM LENGTH OF EQUIVALENT
SUCTION LINE PIPE (m)
SUCTION LINE PIPE SIZES
EXPANSION LINES
PIPE SIZES
UNIT SIZE TYPE
⅜
½
⅝
¾
⅞ 1⅛ 1⅜ ⅜
½
⅝
¾
50
Common 7.5 18 50 80 7.5 50 80
Twin 7.5 23 80 80
80
Common 11 30 80 50 80
Twin 15 50 80 50 80
90
Common 10 25 55 80 20 80
Twin 10 36 80 7.5 80
100
Common 7.5 22 45 80 15 80
Twin 7.5 18 50 80 7.5 50 80
Triple 15 50 80 50 80
130
Common 15 30 80 12 60 80
Twin 7.5 18 50 80 7.5 50 80
Triple 10 36 80 7.5 80
150
Common 12 27 80 8 50 80
Twin 14 36 80 7.5 50 80
Triple 10 36 80 7.5 80
165
Common 8 18 60 80 7.5 40 80
Triple 7.5 18 50 80 7.5 50 80
180
Common 7.5 16 55 80 7.5 35 80
Triple 7.5 18 50 80 7.5 50 80