5
INSTALLATION
Piping
Water make-up piping should be of corrosion-resistant,
code-approved material (copper, steel, or plastic). The
final connection size is ¼" NPT. In cases where water
hammer is possible, a shock arrestor should be
considered.
Drain piping should be of code approved material
(copper, steel, or plastic rated for 212°F/100°C minimum).
The ¾" O.D. copper sweat connection should not be
reduced in size. (See figure 4-3).
If there is no sewer available for drainage, the unit can
be piped for manual drainage. Consult factory for instruc-
tions.
Wiring
The CRU
®
V is designed for a single source of electric
power supply. Future tank removal will be easier if plugs or
quick connects and extra long conduits are used to
provide electrical power to components from subpanel.
Wiring must meet all electrical codes, the current charac-
teristics, and capacity requirements should be checked
against the nameplates. The electrical subpanel should be
mounted in a location convenient for service. Wiring must
be in accordance with all governing codes, and with the
humidifier wiring diagram. The wiring diagram(s) are
shipped loose with the unit. The wiring between the control
cabinet and humidifier must be rated at 105°C, 600V.
Figure 5-1: Horizontal Dispersion Tube Lower Than
Humidifier
OM-774-1
Tee
3"-5"
(127 mm)
Water Seal
When horizontally mounting the dispersion tube in an air
stream that is located lower than the CRUV humidifier a water
seal (to prevent steam from escaping at the open drain) must
be provided in the drain line and line extended to open drain,
as shown, to drain the condensate.
A multiple dispersion
tube bank must be used with a CRUV-30 or CRUV-34
because of its high output (see figure 5-3).
Figure 5-2: Vertical Dispersion Tube
OM-775-1
The dispersion tube can be mounted vertically in the duct.
Note: When dispersion tube is more than 10' (3 m) from unit,
insulated, 1½" (38 mm) diameter minimum rigid tubing or
pipe should be used instead of vapor hose.
This application
is not recommended for CRUV-10 through CRUV-34.
When rapid absorption is extremely critical, a RAPID-SORB
TM
multiple-tube bank can provide 100% steam absorption within
three feet or less - at any duct temperature.
A multiple tube or
RAPID-SORB dispersion system is required for CRUV-30 or
CRUV-34.
For complete information on calculating the number of
dispersion tubes required to satisfy steam absorption
distance requirements, consult your sales representative,
the DRI-STEEM factory, or use DRI-STEEM's DRI-CALC
®
Humidification Sizing and Selection Software.
Duct
Duct
Duct
Figure 5-3: RAPID-SORB
TM
Rapid Absorption Tube
Bank
OM-831-1
Caution: Only qualified electrical personnel
should perform installation procedures.
