35
STEAM INJECTION INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Field piping
MULTIPLE-TUBE HUMIDIFIER
From steam source
Same size as separator inlet
Separator
Separator trap
(see Note 8 on Page 30)
3/4”pipe thread (DN20)
Second inlet
Level
x
x
x
DC-1205
Dispersion tube header
(insulated) (see Table 28-1)
Tube adaptor
12" (305 mm) min.
4" (102 mm) min.
Steam jacket trap (see Note 8 on
Page 30)
12" (305 mm) min.
4" (102 mm) min.
Header trap
(see Note 9 on Page 30)
Secure bracket to duct using 0.375"
(9.5 mm) dia. holes in end of bracket
y (see y note above)
x (See Table
29-1 for
minimum tube
spacing)
Isolation valve (by others)
Dispersion tubes
(see Note 3 on Page 30)
mc_040711_1705
NOTES:
1. To avoid metal fatigue, allow for thermal expansion of dispersion tubes.
2. Dashed lines indicate provided by installer (see Maxi-bank option beginning on Page 36). Right-hand discharge
shown.
3. Dri-calc is DriSteem’s free sizing and selection software available at www.dristeem.com.
4. Steam valve and strainer sizes are provided by Dri-calc (Note 3).
5. See Pages 14 and 15 for more information about trap types and piping.
Install strainer within 3' (1 m) of
humidifier (see Note 4)
Steam valve and actuator (see Note 4)
y = 4½" (114 mm)
min. Center
assembly in
duct. See Note
10 on Page
30.
x
Steam jacket trap (see Note 8 on Page 30)
Steam jacket piping
(see Note 4 on Page 30)
4" (102 mm) min.
FIGURE 35-1: MULTIPLE-TUBE HUMIDIFIER WITH TOTAL TUBE LENGTH GREATER THAN 45' (13.7 M) IN A AHU
