31
Planning
Nortec RS
2596995_0_EN_1905
The following is a list of installation requirements for the water and drainage connections:
The drain line from the humidifier should be as short as possible, and empty into an air gap funnel
(with optional trap) before connecting to the building drain.
The drain line should have a constant minimum downslope of 1.2° to the air gap funnel without
touching its sides or bottom.
The drain line should have a minimum inner diameter of 1.57" (40 mm), and must be made of stain-
less steel, or copper pipe to handle temperatures up to 212 °F (100 °C).
The air gap funnel should be located away from the humidifier control cabinet to prevent rising steam
from damaging the electrical components in the cabinet.
Drain lines from large humidifiers with dual steam cylinders must empty into separate air gap funnels
before connecting to the drain. The combined drain line should have a minimum inner diameter of
1.57" (40 mm).
All water supply and drain connections must be installed to local plumbing codes.
4.3.3 Steam Distribution
The steam generated by the Nortec RS humidifier can be distributed into the conditioned environment
by duct distributors installed on air handling units or within supply ducts, or through built-on blower packs
(Nortec RS Space humidifier) or remote-mounted blower packs. In all cases, the steam distributors must
have a dispersal capacity equal to or greater than the humidifier steam output.
Visit
and use the free Condair online program -
H
umidifier
E
ngineering
and
L
oad-sizing
P
rogram (H.E.L.P.) to assist you with absorption distance calculations, se-
lection of humidifiers, steam distributors, controls and accessories.
Additional information on the effects of humidity, relative humidity calculations, load calcula-
tions, and recommended design conditions can be found in the Condair Humidification Load
Calculation Manual (Condair document 2553856).
4.3.3.1 Duct Distributors
A variety of duct distributors are available for the Nortec RS humidifier to accomodate duct dimensions,
humidifier capacities and steam absorption distances. For more information on available duct distributor
systems refer to the documents listed in
.
Table 11: Duct Distributor Models
Model
Steam Capacity
lb/h (kg/h)
Duct Dimensions
in (mm)
Condair Document
Number
Minimum**
Maximum**
ASD Tube
0-25*
(0-11)
10 (255)
66 (1675)
2556592
BSD Tube
0-35
(0-16)
12 (305)
102 (2590)
CSD Tube
0-115
(0-52)
24 (610)
138 (3503)
SAM-e
Maximum 1200**
(545)**
18×18 W
(457×457 W)
360×360 W
(9145×9145 W)
1503529
Mini SAM-e
Maximum 210**
(95)**
8×12 W
(203×305 W)
36x36 W
(914×914 W)
* Max 22 lb/h (10 kg/h) for 10 in (255 mm) ASD tubes.
** Available in various standardized configurations.
