How it Works
DriSteem
Loading...
CRUV 2

DriSteem CRUV 4, CRUV 2, CRUV 8, CRUV 6, CRUV 10 Installation, Operation And Maintenance Manual

...
READ AND SAVE THESE INSTRUCTIONS
CRUV
Electric Humidifier
®
Installation, Operation, and Maintenance Manual
WARNINGS AND CAUTIONS
Warnings and cautions
WARNING
Indicates a hazardous situation that could result in death or serious injury if instructions are not followed.
mc_051508_1145
WARNING
Attention installer
Read this manual before installing, and leave this manual with product owner. This product must be installed by qualifi ed HVAC and electrical contractors and in compliance with local, state, federal, and governing codes. Improper installation can cause property damage, severe personal injury, or death as a result of electric shock, burns, or fi re.
DriSteem Technical Support: 800-328-4447
Read all warnings and instructions
Read this manual before performing service or maintenance procedures on any part of the system. Failure to follow all warnings and instructions could produce the hazardous situations described, resulting in property damage, personal injury, or death.
Failure to follow the instructions in this manual can cause moisture to accumulate, which can cause bacteria and mold growth or dripping water into building spaces. Dripping water can cause property damage; bacteria and mold growth can cause illness.
mc_011909_1215
Hot surfaces and hot water
This steam humidifi cation system has extremely hot surfaces. Water in tanks, steam pipes, and dispersion assemblies can be as hot as 212 °F (100 °C). Discharged steam is not visible. Contact with hot surfaces, discharged hot water, or air into which steam has been discharged can cause severe personal injury. To avoid severe burns, follow the cool-down procedure in this manual before performing service or maintenance procedures on any part of the system.
mc_011909_1130
CAUTION
Indicates a hazardous situation that could result in damage to or destruction of property if instructions are not followed.
ii
Warnings and cautions
WARNING
Disconnect electrical power
Disconnect electrical power before installing supply wiring or performing service or maintenance procedures on any part of the humidifi cation system. Failure to disconnect electrical power could result in fi re, electrical shock, and other hazardous conditions. These hazardous conditions could cause property damage, personal injury, or death.
Contact with energized circuits can cause property damage, severe personal injury, or death as a result of electrical shock or fi re. Do not remove humidifi er electrical panel cover, heater terminal cover, or subpanel access panels until electrical power is disconnected.
Follow the shutdown procedure in this manual before performing service or maintenance procedures on any part of the system.
mc_052410_1510
Electric shock hazard
If the humidifi er starts up responding to a call for humidity during maintenance, severe bodily injury or death from electric shock could occur. To prevent such start-up, follow the procedure below before performing service or maintenance procedures on this humidifi er (after the tank has cooled down and drained):
• If the humidifi er is equipped with a Vapor-logic
• Shut off all electrical power to humidifi er using fi eld-installed fused disconnect, and lock all power disconnect switches in OFF position.
• Close fi eld-installed manual water supply shut-off valve.
mc_050808_1540-CRUV
®
controller, use the keypad to change the control mode to Standby.
CAUTION
Hot discharge water
Discharge water can be as hot as 212 °F (100 °C) and can damage the drain plumbing.
To prevent such damage from humidifi ers without water tempering, allow the tank to cool before draining.
Humidifi ers equipped with a water tempering device such as a DriSteem Drane-kooler need fresh make-up water in order to function properly. Make sure the water supply to the water tempering device remains open during draining.
Excessive supply water pressure
Supply water pressure greater than 80 psi (550 kPa) can cause the humidifi er to overfl ow.
mc_030910_1440
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
iii
Table of contents
WARNINGS AND CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Supply water guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Product overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Tap/softened water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
RO/DI water option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Water type conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Dispersion options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Capacities, electrical specifications, and weights . . . . . . . . . . . . . . . . . . 4
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Selecting a location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CRUV in a packaged unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Dispersion in a duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Dispersion control devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Piping: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Tap/softened water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
RO/DI water option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Supply water and drain piping . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Drane-kooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Sensor placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Dispersion: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Selecting the dispersion assembly location . . . . . . . . . . . . . . . . . . . 14
High-efficiency Tube option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Drip tee installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Interconnecting piping requirements . . . . . . . . . . . . . . . . . . . . . . . . 16
Single tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Rapid-sorb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Ultra-sorb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
ATTENTION INSTALLER
ii
Read this manual before installing. Leave manual with product owner.
DriSteem Technical Support 800-328-4447
Where to find more information
On our Web site:
The following related documents can be viewed, printed or ordered from our web site, www.dristeem.com
• Catalogs: – CRUV – Ultra-sorb
• Installation, Operation, and Maintenance manuals:
– Ultra-sorb – Vapor-logic® controller (includes humidifi er
operation and troubleshooting)
• DriSteem Design Guide (includes steam loss tables and general humidifi cation information)
In DriCalc:
DriCalc® is our humidifi cation system sizing and selection software, which can be ordered from our website. Also in DriCalc:
• Library of installation guides
• Dispersion and sensor placement in ducts and air handlers
• Vertical airfl ows
Or call us at 800-328-4447
While obtaining documents from our web site or from DriCalc is the quickest way to review our literature, we will also mail to you any literature you need.
®
iv
Table of contents
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Start-up procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Start-up checklist: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
LW series controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Vapor-logic controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Start-up and operation: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
LW series controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Vapor-logic controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Tap/softened water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Water quality and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Skim duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Cool down humidifier (LW series controller) . . . . . . . . . . . . . . . . . . 34
Cool down humidifier (Vapor-logic controller) . . . . . . . . . . . . . . . . . 34
Inspection and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Off-season shut-down procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 37
RO/DI water option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Cool down humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Inspection and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Off-season shut-down procedure . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Troubleshooting: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
LW series controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
LW series controller and RO/DI water . . . . . . . . . . . . . . . . . . . . . . 41
Replacement parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Subpanel with LW series controller . . . . . . . . . . . . . . . . . . . . . . . . 44
Subpanel with time delay and relay . . . . . . . . . . . . . . . . . . . . . . . . 46
Subpanel with Vapor-logic option . . . . . . . . . . . . . . . . . . . . . . . . . 48
Subpanel with Vapor-logic and SSR options . . . . . . . . . . . . . . . . . . 50
Keypad/display and troubleshooting
The Vapor-logic Installation and Operation Manual, shipped with your humidifi er if
ordered with optional Vapor-logic control, is a comprehensive operation manual. Refer to it for information about using the keypad/display and Web interface, and for troubleshooting information.
Download DriSteem literature
Most DriSteem product manuals can be downloaded, printed, and ordered from our web site: www.dristeem.com
mc_052410_1335
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
1
OVERVIEW
Supply water guidelines
Product overview
FIGURE 2-1: CRUV HUMIDIFIER
Tap/softened water model
Probe
Steam outlet
Strainer
Fill valve
Over fl ow
OM-770-1
Electric drain
TAP/SOFTENED WATER
Heater terminal cover
Cover
Cover bolts
Heater element
Tank temperature sensor
CRUV humidifi ers with tap/softened water (shown above) use electricity to heat tap or softened fi ll water into steam for humidifi cation. A conductivity probe monitors the water level; therefore, water conductivity must be at least 30 µS/cm for proper operation. CRUV with tap/softened water will not operate with RO/DI water. For RO/DI water, use CRUV with the RO/DI water option.
RO/DI WATER OPTION
CRUV humidifi ers with RO/DI water systems (systems using deionized water or water that has been treated using reverse osmosis) use electricity to heat RO/DI fi ll water into steam for humidifi cation. Water level is controlled with a fl oat valve and low water cutoff switch. Float valves are compatible with RO/DI water only.
Humidifi ers with the RO/DI water option are virtually maintenance free and require little or no downtime.
Supply water guidelines
Supply water quality is an important component of humidifi er reliability and maintenance.
Examples:
• Corrosive water can decrease the service life of the humidifi er.
• Excessive water hardness can increase the humidifi er maintenance requirements.
To maximize humidifi er service life and minimize humidifi er maintenance, DriSteem has established guidelines for supply water See Table 2-1.
Table 2-1: DriSteem supply water guidelines
Chlorides*
RO or DI water Softened water Tap water
* Damage caused by
chloride corrosion is not covered by your DriSteem warranty.
Total hardness
Tap water < 500 ppm
pH
RO, DI, or softened water Tap water
Silica < 15 ppm
You may wish to take action to mitigate potential negative effects to your humidifi er. Supply water outside of these guidelines may void your DriSteem warranty. Please contact your DriSteem Representative or DriSteem Technical Support if you need advice.
< 5 ppm
< 25 ppm
< 50 ppm
7 to 8
6.5 to 8.5
WATER TYPE CONVERSION
CRUV tap/softened water humidifi ers can be converted in the fi eld for use with RO/DI water, and CRUV RO/DI water humidifi ers can be converted in the fi eld for use with tap/softened water. Contact your DriSteem representative or distributor for parts and instructions.
mc_061610_1640-CRUV
2
Notes: See Pages 8 and 9 for detailed installation drawings.
mc_071912_1545
OVERVIEW
Product overview
DISPERSION OPTIONS
Dispersion options shown on this page are available for CRUV humidifi ers. See the installation instructions beginning on Page 6.
FIGURE 3-1: ULTRA-SORB DISPERSION FIGURE 3-2: WATER LEVEL CONTROL FOR TAP/SOFTENED
WATER HUMIDIFIER
OM-7475
VLC-OM-030
Fill valve closes when water level rises to this probe.
Fill valve opens when water level is below this probe.
Low-water cutoff. Power to heaters is cut if water level drops below this probe.
FIGURE 3-3: RAPID-SORB DISPERSION
OM-2007
FIGURE 3-5: SINGLE OR MULTIPLE TUBE DISPERSION
Humidifi ers using tap or softened water control water levels electronically using a three-rod probe. The controller responds with the above actions when the water level reaches each rod.
mc_030910_1335
FIGURE 3-4: WATER LEVEL CONTROL FOR RO/DI WATER OPTION HUMIDIFIER
Supply water connection
Float ball
Float rod
OM-7396
Humidifi ers using RO/DI water control water levels using a fl oat valve and low-water cutoff switch.
mc_052710_1644
OM-2006
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
3
OVERVIEW
Capacities, electrical specifi cations, and weights
Table 4-1: CRUV capacities, electrical specifications, and weights
CRUV model
kW lbs/hr kg/h 120V 208V 240V 277V 480V 600V 208V 240V 277V 480V 600V lbs kg lbs kg
2 6 2.7 16.7 9.6 8.3 7.2 4.2 3.3 —————25114520
4 12 5.4 33.3 19.2 16.7 14.4 8.3 6.7 16.7* 14.4* 12.5 7.2* 5.8* 27 12 47 21
6 18 8.2 — 28.8 25.0 21.7 12.5 10.0 25.0* 21.7* 18.8 10.8* 8.7* 37 17 75 34
8 24 10.9 — 38.5 33.3 28.9 16.7 13.3 33.3* 28.9* 25.0 14.4* 11.5* 37 17 75 34
10 30 13.6 — — 41.7 36.1* 20.8 16.7 29.1* 25.3* 21.9 12.6* 10.1* 39 18 90 41
12 36 16.3 — — — 43.3 25.0 20.0 33.3 28.9 25.0 14.4 11.5 39 18 90 41
14 42 19.1 ————29.2 23.3 38.9 33.7 29.2 16.8 13.5 39 18 90 41
16 48 21.8 ————33.3 26.7 44.4 38.5 33.3 19.2 15.4 39 18 90 41
21 63 28.6 ————43.8 35.0 — — 43.8 25.3 20.2 43 20 104 47
25 75 34.0 —————41.7 — — — 30.1 24.1 43 20 104 47
30 90 40.9 —————————36.1 28.9 48 22 109 49
Maximum
steam
capacity**
Single-phase Three-phase
Current draw (amps)
Shipping
weight***
Operating
weight***
34 102 46.3 —————————40.9 32.7 48 22 109 49
* For wire sizing, the highest leg draw is shown due to current imbalance. ** Total humidifi er load = load to meet design conditions + load to compensate for steam loss from the dispersion assembly and interconnecting
piping. If total humidifi er load is more than the humidifi er’s maximum capacity, design conditions will not be met. For steam loss data see the DriSteem Design Guide available for downloading and printing at www.dristeem.com
*** Depending on confi guration, add up to 28 lbs (13 kg) for weight of control cabinet, subpanel, and other electrical control components.
mc_071210_1440
Table 4-2: Steam connection sizes
CRUV model Steam outlet
2, 4, 6, 8
10, 12, 14 ,16
21, 25, 30, 34
mc_052410_1705-CRUV
1 ½ " hose or NPT connection
1 ½ " or 2" hose or NPT connection
2" hose or NPT connection
FIGURE 4-1: STEAM OUTLET CONNECTIONS
Hose clamp (for steam hose)
The steam outlet is designed to connect to a steam hose or NPT connection. Tap/softened water CRUV shown.
mc_052510_1531-CRUV
DC-1168
4
Dimensions
FIGURE 5-1: CRUV DIMENSIONS
OVERVIEW
Tap/softened water CRUV shown
Electrical conduit knockouts:
• CRUV Models 2 and 4 have combination knockout for ½" and ¾" conduit connectors; knockout diameters are 22.3 mm and
28.6 mm.
• CRUV Models 6 through 34 have combination knockout for ¾" and 1" conduit connectors; knockout diameters 28.6 mm and
34.9 mm.
C
D
Top view
A
Front viewSide view
B
Electrical conduit knockouts
C
F
E
OM-2004, OM-2002, OM-2003 mc_071210_1445
Table 5-1: CRUV dimensions
ABCDE F
CRUV model
inches mm inches mm inches mm inches mm inches mm inches mm
2, 4 4.50 114 15.50 394 12.50 318 9.00 229 9.00 229 12.13 308
6, 8 7.18 183 16.00 406 16.88 429 10.00 254 14.34 369 13.25 337
10, 12, 14, 16 7.18 183 16.00 406 16.88 429 11.75 199 14.34 364 14.88 378
21, 25, 30, 34 7.18 183 16.00 406 16.88 429 13.25 337 14.34 364 16.38 416
mc_071210_1446
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
5
INSTALLATION
Selecting a location
Locate the CRUV humidifi er near an electric power source, a water supply, and a drain. Verify that suffi cient room is provided for a water seal in the drain piping. See Figures 8-1 and 9-1.
Place the control cabinet or electrical subpanel in a grounded protective metal enclosure, and mount in a dry and accessible location.
CRUV IN A PACKAGED UNIT
When installing a humidifi er inside a packaged unit, provide adequate support. Allow easy access for removing and servicing the evaporating chamber, and provide adequate clearance to install the steam hose and dispersion tube and water seal.
DISPERSION IN A DUCT
When rapid absorption is extremely critical, a Rapid-sorb can provide 100% steam absorption within three feet or less at any duct temperature. A multiple tube or Rapid-sorb is required for CRUV Models 30 and 34 because of their high output. See Figure 7-1 and the “Rapid-sorb” section beginning on Page
22.
When installing a dispersion tube in a duct, allow for a continuous pitch of the steam hose back to the evaporating chamber (Figure 6-2), or use a water seal and drain (Figure 7-1).
If draining the evaporating chamber by gravity is not possible, use a small condensate pump rated for 212 °F/100 °C water.
FIGURE 6-1: INSTALLATION IN AN AIR CONDITIONING UNIT
OM-2008
CRUV with a single dispersion tube in a packaged air conditioning unit
FIGURE 6-2: HORIZONTAL DISPERSION TUBE
The dispersion tube can be mounted vertically in the duct (Figure 7-2).
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 steam hose. This application is not recommended for CRUV Models 10 through 34.
Duct
Steam hose
OM-2006
Horizontal mounting of dispersion tube in a duct, connected via steam hose to a wall-mounted CRUV humidifi er.
6
Selecting a location
INSTALLATION
HUMIDIFIER
When selecting a location for the humidifi er, consider the following:
• Proximity to the duct
Install the humidifi er near the air duct system where the dispersion assembly
will be located. The maximum recommended length for steam hose connecting a single humidifi er to a dispersion assembly is 10' (3 m). The maximum recommended developed length for tubing or pipe connecting a single humidifi er to a dispersion assembly is 20' (6 m).
For more information about installing dispersion assemblies, see
“Dispersion,” beginning on Page 14.
• Elevation of the installed dispersion assembly
The recommended installation location for the dispersion assembly is at an
elevation higher than the humidifi er. However, if the dispersion assembly must be installed at an elevation lower than the humidifi er, install a drip tee and drain. See “Drip tee installation” on Page 15.
Before installing a dispersion assembly or interconnecting piping, review all
pitch requirements in the “Dispersion” section of this manual.
• Required clearances (see Figure 5-1)
• Electrical connections
FIGURE 7-1: RAPID-SORB DISPERSION
Duct
OM-831-1
FIGURE 7-2: VERTICAL DISPERSION TUBE
Duct
Electrical power supply connections are at the lower or upper right rear
corner of the unit. See “Wiring” on Page 12.
• Supply water and drain piping connections
Water supply piping and drain connections are at the lower left rear corner
of the unit. See the piping illustrations and instructions starting on Page 8.
• Exterior wall insulation
Install the humidifi er on an exterior wall only if the wall is properly
insulated.
DISPERSION CONTROL DEVICES
See Figure 13-1 for recommended installation locations for the dispersion assembly and associated control devices.
mc_062810_0928-NA
OM-775-1
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
7
INSTALLATION
Piping:
FIGURE 8-1: CRUV (TAP/SOFTENED WATER) FIELD PIPING OVERVIEW
Water supply line:
• ¼" NPT (DN8) connection size
• 25 to 80 psi (175 to 550 kPa) required water pressure
• First 3’ (1 m) of supply line must be rated for 212 ºF (100 ºC)
If water piping to humidifi er is nonmetallic, we recommend a 2” (50 mm) metallic water seal or loop in the supply line to isolate steam during maintenance.
Tap/softened water
Water inlet strainer
Water supply inlet
Shock arrester recommended to reduce water hammer
If run is over 10' (3 m), increase pipe to 1¼" (DN32)
Pitch 1/8"/ft
(1%)
2" (51 mm)
recommended
Steam steam hose
Heater terminal cover
Tank surfaces will reach 212 °F (100 °C) when operating. Provide outer protection from direct contact, but allow for natural ventilation.
Install plumb
Tank support
DC-1133
Drain
Skim/overfl ow port
12" (305 mm)
minimum
1" (25 mm) air gap
Open drain required. See fi rst note below.
Notes:
• Locate air gap only in spaces with adequate temperature and air movement to absorb fl ash steam; otherwise, condensation may form on nearby surfaces. Refer to governing codes for drain pipe size and maximum discharge water temperature.
• Offset hu mid i fi er from fl oor drain to prevent fl ash steam from rising into the hu mid i fi er.
• Dashed lines indicate provided by installer.
• The water supply inlet is more than 1" (25 mm) above the skim/overfl ow port, eliminating the pos si bil i ty of backfl ow or si phon ing from the tank. No additional backfl ow prevention is required; however, governing codes prevail.
• Damage caused by chloride corrosion is not covered by your DriSteem warranty.
mc_071210_1603
¾" (DN20) union for skim, drain, and overfl ow connection; plumbing rated for 212 °F (100 °C)
8
INSTALLATION
Piping:
FIGURE 9-1: CRUV (RO/DI WATER OPTION) FIELD PIPING OVERVIEW
If water piping to humidifi er is nonmetallic, we recommend a 2" (50 mm) stainless steel water seal or loop in the supply line to isolate steam during maintenance
Water supply line:
• ¼" NPT (DN8) connection size
• 25 to 80 psi (175 to 550 kPa) required water pressure
• First 3’ (1 m) of supply line must be rated for 212 ºF (100 ºC)
RO/DI water option
Water inlet strainer, by installer
Water supply inlet
Skim/overfl ow port
If run is over 10' (3 m), increase pipe to 1¼" (DN32)
Pitch 1/8"/ft
(1%)
2" (51 mm)
recommended
Steam steam hose
Heater terminal cover
Tank surfaces will reach 212 °F (100 °C) when operating. Provide outer protection from direct contact, but allow for natural ventilation.
Install plumb
Tank support
DC-1135
¾" (DN20) union for skim, drain, and overfl ow connection;
12" (305 mm)
minimum
1" (25 mm) air gap
Open drain required. See fi rst note below.
Notes:
• Locate air gap only in spaces with adequate temperature and air movement to absorb fl ash steam; otherwise, condensation may form on nearby surfaces. Refer to governing codes for drain pipe size and maximum discharge water temperature.
• Offset hu mid i fi er from fl oor drain to prevent fl ash steam from rising into the hu mid i fi er.
• Dashed lines indicate provided by installer.
• The water supply inlet is more than 1" (25 mm) above the skim/overfl ow port, eliminating the pos si bil i ty of backfl ow or si phon ing from the tank. No additional backfl ow prevention is required; however, governing codes prevail.
• Damage caused by chloride corrosion is not covered by your DriSteem warranty.
mc_071210_1604
plumbing rated for 212 °F (100 °C)
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
9
INSTALLATION
Supply water and drain piping Piping:
Supply water piping may be of any code-approved material (copper, steel, or plastic). The fi ll valve connection size is a ¼" pipe thread (DN8) fi tting. In cases where water hammer may be a possibility, consider installing a shock arrestor. Water pressure must be between 25 psi and 80 psi (175 kPa and 550 kPa).
If water piping to humidifi er is nonmetallic, we recommend that the fi rst 3' (1 m) of water supply piping from the humidifi er be metallic with a 2" (50 mm) water seal or loop in the supply line to isolate steam from nonmetallic supply piping.
Drain piping may be of any code-approved material (copper, steel, or plastic rated for 212 °F [100 °C] minimum). If drainage by gravity is not possible, use a reservoir pump rated for 212 °F (100 °C) water.
The fi nal connection size is ¾" (DN20) copper for the tank and frame drains. Do not reduce this connection size. Pipe the tank and frame drains separately, as shown in Figures 8-1 and 9-1, to prevent backfl ow of drain water into the humidifi er cabinet.
If the equivalent length of pipe from the humidifi er drain to the plumbing system drain is more than 10' (3 m), increase the pipe size to 1¼" (DN32).
CAUTION
Hot discharge water
Discharge water can be as hot as 212 °F (100 °C) and can damage the drain plumbing.
To prevent such damage from humidifi ers without water tempering, allow the tank to cool before draining.
Humidifi ers equipped with a water tempering device such as a DriSteem Drane-kooler need fresh make-up water in order to function properly. Make sure the water supply to the water tempering device remains open during draining.
Excessive supply water pressure
Supply water pressure greater than 80 psi (550 kPa) can cause the humidifi er to overfl ow.
mc_030910_1440
See Figures 8-1 and 9-1 for more piping instructions.
Important: Install unions in the water supply and drain lines as shown in Figures 8-1 and 9-1 to allow tank removal.
mc_062810_0930-CRUV
FIGURE 10-1: DRANE-KOOLER WATER TEMPERING DEVICE
OM-7547
DriSteem's Drane-kooler, shown mounted to a CRUV humidifi er, tempers discharged water. For other Drane-kooler mounting options or for more information, contact your DriSteem representative/distributor, or view the Drane-kooler product data sheet in the literature section at www.dristeem.com.
10
INSTALLATION
Piping:
FIGURE 11-1: FIELD PIPING CONNECTIONS, DRANE-KOOLER™ WATER TEMPERING DEVICE
Notes:
• Dashed lines indicate provided by installer
• Total length of pipe between humidifi er and Drane-kooler not to exceed 10' (3 m)
Water supply shut-off valve
Drane-kooler
Vacuum breaker
Union
3/8" NPT (DN10) cold water inlet; water pressure 25 to 80 psi (172 to 552 kPa); maximum temperature 70 °F (21 °C)
Floor
Field piping
3/4" NPT (DN20) hot drain water inlet. For runs longer than 10' (3 m), increase to 1" NPT (DN25).
Union
Tempered water outfl ow 12 gpm (45.4 L/m) at 140 °F (60 °C)
Union
Drane-kooler Part No. 902205 (NPT connections) Part No. 902206 (BSP connections)
mc_050610_1335-no-frame-drain
FIGURE 11-2: LIFTING DRAIN WATER
Discharge piping
(by installer) Inlet drain water piping (by installer)
Check valve
DC-1117
Condensate pump
Note: Use a condensate pump rated for your application. Pumps are rated by fl uid temperature, head (pressure), and fl ow (gpm). Contact your local DriSteem representative for pump selection.
mc_022410_1155
2" NPT (DN50) tempered water outlet
DC-1120
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
11
INSTALLATION
Wiring
HUMIDIFIER FIELD WIRING
All wiring must be in accordance with all governing codes, and with the humidifi er wiring diagrams. The diagrams are located inside the removable subpanel cover on the right side of the humidifi er cabinet. Power supply wiring must be rated for 220 °F (105 °C).
When selecting a location for installing the humidifi er, avoid areas close to sources of electromagnetic emissions such as power distribution transformers.
The fi ll valve, drain valve, probes, and temperature sensors use Class 2, 24 VAC power.
The use of semiconductor fusing sized per the National Electric Code is recommended with the SSR option.
GROUNDING REQUIREMENTS
The approved earth ground must be made with solid metal-to-metal connections and must be a good conductor of radio frequency interference (RFI) to earth (multistranded conductors).
WARNING
Electric shock hazard
Only qualifi ed electrical personnel should perform fi eld wiring installation procedures. Improper wiring or contact with energized circuits can cause property damage, severe personal injury, or death as a result of electric shock and/or fi re.
Do not remove the humidifi er electrical panel cover or the heater terminal cover until electrical power is disconnected. Contact with energized circuits can cause property damage, severe personal injury, or death as a result of electrical shock.
mc_062310_0629
Ground wire should be the same AWG (mm2) size as the power wiring or sized per NEC requirements.
PROPER WIRING TO PREVENT ELECTRICAL NOISE
Electrical noise can produce undesirable effects on electronic control circuits, which affects controllability. Electrical noise is generated by electrical equipment such as inductive loads, electric motors, solenoid coils, welding machinery, or fl uorescent light circuits. The electrical noise or interference generated from these sources (and the effect on controllers) is diffi cult to defi ne, but the most common symptoms are erratic control or intermittent operational problems.
Important:
• For maximum EMC (electromagnetic compatibility) effectiveness, wire all humidity, high limit, and airfl ow controls using multicolored shielded/ screened plenum-rated cable with a drain wire for the shield/screen. Connect the drain wire to the shield/screen ground terminal with wire less than 2" (50 mm) in length.
• Do not ground shield at the device end.
mc_061610_0625-CRUV
FIGURE 12-1: FIELD WIRING REQUIREMENTS
Power
Fused
Control cabinet
Notes:
• Control wiring and power wiring must be run in dedicated or separate earthed metal conduit, cable trays, or trunking.
• Separate the line voltage wiring from low voltage control circuit wiring when routing electrical wiring inside the humidifi er cabinet.
• Do not use chassis or safety grounds as current-carrying commons. Never use a safety ground as a conductor or neutral to return circuit current.
mc_062310_0630-CRUV
disconnect (provided by installer)
OM-7552
supply
(provided
by installer)
12
Sensor placement
INSTALLATION
SENSOR LOCATION IS CRITICAL
Sensor location has a signifi cant impact on humidifi er performance. See the recommendations below and Figure 13-1.
Note: DriSteem recommends that you do not interchange room and duct
humidity devices. Room humidity devices are calibrated with zero or little airfl ow, whereas duct humidity devices require air passing across them.
Recommended humidity control (transmitter/humidistat) locations:
A Ideal. Ensures the best uniform mix of dry and moist air with stable
temperature control.
B Acceptable, but room environment can affect controllability, such as when
sensor is too close to air grilles, registers, or heat radiation from room lighting.
C Acceptable. Provides uniform mixture of dry and moist air. If extended time
lag exists between humidity generation and sensing, extend sampling time.
D Acceptable (behind wall or partition) for sampling entire room if sensor is near
an air exhaust return outlet. Typical placement for sampling a critical area.
E Not acceptable. These locations might not represent actual overall
conditions in the space.
Other factors affecting humidity control
Humidity control involves more than the controller’s ability to control the system. Other factors that play an important role in overall system control are:
• Size of humidifi cation system relative to load
• Overall system dynamics associated with moisture migration time lags
• Accuracy of humidistats and humidity transmitters and their location
• Dry bulb temperature accuracy in space or duct
• Velocities and airfl ow patterns in ducts and space environments
• Electrical noise or interference
mc_072011_1656
F Not acceptable. Do not place sensors near windows, door passageways,
or areas of stagnant airfl ow.
Recommended safety (airfl ow and high limit) sensor location:
G Best sensing location for high limit humidistat or humidity sensor and airfl ow
proving switch.
mc_072011_1655
FIGURE 13-1: RECOMMENDED SENSOR LOCATIONS
Outside air
Relief air
Damper control
Return air
E
A
C
Air handling
unit
Window
Wall or partition
D
B
8' to 12'
(2.4 m to 3.7 m)
min.
G
F
High limit humidistat or high limit transmitter (set at 90% RH maximum) for VAV applications
Airfl ow switch or differential pressure switch (sail type recommended for VAV applications)
Vapor absorption has taken place
Point of vapor absorption
Humidifi er dispersion assembly
Turning vanes
DC-1084M
mc_060508_0750
F
Doorway
E
F
Window
Temperature compensation option: Place a temperature compensation sensor on the lower corner of the inside surface of double-pane window glass on north- or northeast-facing window.
CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
13
Loading...
+ 39 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use