Nortec RH - Page 13

Installation | 10
Steam Lines and Condensate Returns
Figure 7: Main Steam Line Requirements
Table 3: Recommended Steam Line Material
Steam Line
Material
Steam Line Length
ft m Steam Line Description
Copper Tube
0-10 0-3
3/4 in MED-L Tubing (7/8 in. OD)
10+ 3+
*1 in. MED-L Tubing (1 1/8 in. OD)
Stainless Steel
Tube
0-20 0-6
1 1/2 in. MED-L Tubing (1 5/8 in. OD)
20+ 6+
*2 in. MED-L Tubing (2 1/8 in. OD)
Nortec Hose < 10 < 3
Part Number 1328810 (7/8”)
Note: * These diameters require a reducer at humidifier and steam distributor connection. Use Nortec part number 1115444 at
humidifier to prevent backpressure caused by condensation collecting at the reduction.
Table 4: Maximum Recommended Length of Steam Line
Steam Output
(lb/hr)
Distance
(ft)
Possible Loss
(lb/hr)
Steam Line Size
(in)
5 8 1.0 3/4
10 15 1.5 3/4
NOTE: 1 Use one inch copper steam line for longer runs.
2 The use of steam line other then copper, stainless steel tube or Nortec supplied steam line will void the
warranty and may adversely effect the operation of the humidifier
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2 in.
(5 cm)
1 ft (30 cm)
1ft (30 cm)
0.5 in.
(12 mm)
10 Degrees
2 Degrees
Use Appropriate Slope Insulate Pipe
1 in. (2.5 cm) pipe
insulation
MAIN RULES FOR ATMOSPHERIC STEAM LINES
• Slope the steam lines
• Trap condensate (Use full size ‘T’ for Traps)
• Condensate traps must be a minimum of 3 in. (15 cm) in height or duct static
pressure + 2 in. whichever is greater.
• Steam lines must not have any restrictions which could cause back pressure.
• Insulate with 1.0 in. (2.5 cm) pipe insulation
• Follow recommended materials, size and length see tables.