Specifications

19
VAPORMIST INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
INSTALLATION
Dispersion:
Important:
Reducing the inside diameter of the steam hose
or tubing will result in the internal humidifier
system pressure exceeding the parameters for
acceptable performance.
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Important:
Failure to follow the recommendations in this
section can result in excessive back pressure on
the humidifier. This will result in unacceptable
humidification system performance such as
leaking gaskets, blown water seals, erratic
water level control, and spitting condensate
from dispersion tubes.
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The steam outlet on the humidifier is sized to the output of the humidifier.
DO NOT use steam hose or tubing with an inside diameter smaller than the
humidifier steam outlet. See note at left.
• See maximum steam carrying capacities in Table 19-1.
• If the humidifier must be located higher than the dispersion assembly, use
the recommended installation shown in Figure 21-1.
CONNECTING TO HUMIDIFIER WITH STEAM HOSE
• Support steam hose to prevent sags, or low spots, and to maintain a
minimum pitch of 2"/ft (15%) back to the humidifier.
• Use DriSteem steam hose. Other manufacturers of steam hose may use
unacceptable release agents or material mixes that can affect humidifier
system performance adversely. Using hose from alternative manufacturers
increases the possibility of tank foaming and accelerated aging. Foaming
causes condensate discharge at the dispersion assembly.
• Do not use steam hose in outdoor applications.
• Do not insulate steam hose. Insulation causes accelerated heat aging,
causing the steam hose to become hard and susceptible to failure due to
cracks.
• For single dispersion tube applications, see hose kit sizes in Table
29-1.
Table 19-1:
Maximum steam carrying capacity and length of interconnecting steam hose or tubing
Steam hose
1
Copper or stainless steel tubing
Hose I.D. Maximum capacity Maximum length
2
Tubing size Maximum capacity
3
Maximum developed length
4
inches DN lbs/hr kg/h ft m inches DN lbs/hr kg/h ft m
1½ 40 150 68 10 3 1½ 40 150 68 20 6.1
2 50 250 113 10 3 2 50 220 100 30 9.2
1. When using steam hose, use DriSteem steam hose for best
results. Field-supplied hose may have shorter life and may cause
foaming in the evaporating chamber resulting in condensate
discharge at the dispersion assembly. Do not use steam hose for
outdoor applications.
2. Maximum recommended length for steam hose is 10' (3 m).
Longer distances can cause kinking or low spots.
3. Insulate tubing to minimize loss of capacity and efficiency.
4. Developed length of tubing equals measured length plus 50% of measured
length, to account for fittings.
Longer tubing lengths are possible at capacities lower than listed maximums.
Consult factory.
Note: Capacities and lengths in this table are based on total maximum pressure drop in hose or tubing of 5" wc (1250 Pa)
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Interconnecting piping requirements