DriSteem RL-31 User manual

RL-31
DEHUMIDIFIER
CDS DEHUMIDIFIER
Installation, Operation, and
Maintenance Manual
Read and save these instructions

2CDS DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
WARNING CAUTION
Indicates a hazardous situation that could result in death or
serious injury if instructions are not followed.
Indicates a hazardous situation that could result in damage to or
destruction of property if instructions are not followed.
WARNING
• High voltage may cause serious injury from electric shock. Disconnect electrical power before starting installation or
servicing. Leave power disconnected until installation/service is completed.
• Sharp edges may cause serious injury from cuts. Use care when cutting plenum openings and handling duct work.
• Dropping may cause personal injury or equipment damage. Handle with care and follow installation instructions.
Warnings and cautions
CAUTION
• Read all instructions before beginning installation.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not
play with the appliance.
• Do not use in pool applications. Pool chemicals can damage the dehumidifier.
• Do not use solvents or cleaners on or near the circuit board. Chemicals can damage circuit board components.
• Wait 24 hours before running the unit if it was not shipped or stored in the upright position.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons
in order to avoid a hazard.
• If hard wiring the appliance, install a disconnect within eyesight of the appliance which provides full disconnection
under overvoltage category III conditions. Refer to local and national codes and full instructions on page 16.

3
CDS DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Table of contents
ATTENTION INSTALLER
Read this manual before installing.
Leave manual with product owner.
DriSteem®Technical Support
800-328-4447
WHERE TO FIND MORE INFORMATION
Our web site:
The following documents are available on our
web site: www.dristeem.com
• CDS Dehumidifier Brochure
• CDS Dehumidifier IOM
Call us at 800-328-4447
Obtaining documents from our web site is the
quickest way to view our literature.
Learn More
OVERVIEW.................................................................4
Product overview.........................................4
Models, capacities, and electrical specifications ...................5
SPECIFICATIONS .............................................................5
INSTALLATION ..............................................................6
Dimensions .............................................6
Selecting a location ......................................7
Mounting ..............................................8
Drain installation ........................................10
Round duct ............................................12
Hard wire - line voltage ...................................16
System set-up & checkout ..................................17
Wiring and setup .......................................19
Alternative external control or DriSteem BACnet®dehumidistat ........21
Daisy chain wiring ......................................22
TROUBLESHOOTING.........................................................25
RL Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
REPLACEMENT PARTS ........................................................27
WARRANTY ...............................................................32

4CDS DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Dehumidifer Control
Electrical Panel
Access Door
ON/OFF button
used to turn
dehumidifier on
and off
Up/Down
buttons used
to change
humidity setting
MODE button
used for
optional features
Inlet
Filter
Outlet
90-2528
Product overview
OVERVIEW
FIGURE 4-1: CDS DEHUMIDIFIER

5
CDS DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Models, capacities, and electrical specifications
SPECIFICATIONS
Table 5-1:
RL Series Specifications
Model RL-31
Electrical
Voltage 208 - 240 VAC, 1 Phase,
60 HZ 277 VAC, 1Phase, 60 HZ
Operating Current 19.6A @ 80°F (26.7°C),
60% RH, 240 VAC 17.4A @ 80°F (26.7°C), 60% RH, 277 VAC
Rated Current 24A (install on dedicated 30A circuit)
Efficiency 3.0 L/kWh @ 80°F (26.7°C), 60% RH, 240 VAC
Environmental
Operating Temperature Range 50°F to 104°F (10°C to 40°C), 60°F (15.6°C) @ 40% RH to 85°F (29.4°C) @ 80% RH
(ideal conditions for unit to not go into defrost or shut down due to high pressure)
Operating Dew Point Lower Limit 36°F (2°C)
Mechanical
Dimensions
Width 44.88” (1140 mm)
Height 34.41” (874 mm)
Length 31.72” (806 mm)
Weight 360 lbs (163 kg) (without packaging)
Drain Size 3/4" FNPT (DN 20)
Capacity 89 gallons/day @ 80°F (337 Liters/day @ 26.7°C), 60% RH (31 lbs/hr)
Filter MERV 11 (30" x 32" x 2")
Airflow 1760 CFM (2990 m3/h) (free flow)
Power cord Units shipped with 10' (3m) power cord or can be hard wired.
Controls
Dehumidifier control 50°F and 104°F (10°C to 40°C) cut off
External control Off on high/low pressure

6CDS DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
INSTALLATION
90-2529
FIGURE 6-1: CDS DEHUMIDIFIER DIMENSIONS
Dimensions
34-13/32 (874 mm)
BACKTOP
Up to 1/2" (DN 15) diameter rod
30 (762 mm)
31-23/32 (804 mm)
42-11/16 (1084 mm)
43-25/32 (1112 mm)
44-7/8 (1140 mm)
15-23/32 (399 mm)
ø 3/4" (DN20) FNPT drain
6-1/4 (159 mm)

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CDS DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
90-2530
UNPACKING THE DEHUMIDIFIER
Disassemble the carton, but leave the unit attached to the pallet for installing
the unit with a forklift or scissors lift.
INCLUDED IN THE CARTON
• Dehumidifier
• Installation manual
• 3/4" (DN20) P-Trap
• 3/4" MNPT x 3/4" (DN20 x 20 mm) female pipe
• 3/4" x 3/4" x 3/4" (DN20 x DN20 x DN20) T-fitting
• 30 feet of thermostat cable
• MERV 11 filter
• Model D77 control (ships separately, if selected)
LOCATION CONSIDERATIONS
This unit is not to be accessible to the general public. The dehumidifiers should
be spaced evenly throughout the area to be dehumidified with the following
recommendations:
1. Avoid placement where the discharge of one dehumidifier is pointing
toward the inlet of another.
2. Avoid locating the dehumidifier inlet too near a supply register. Space is
not usually available to totally avoid this, but minimizing the amount of
cold air that is discharged to the dehumidifier inlet will improve moisture
removal performance of the dehumidifier.
3. Account for handling dehumidifier condensate by considering drain or
condensate pump locations.
4. Leave 18" (457 mm) minimum clearance for access to the user interface,
electrical panel for service and filter for maintenance.
FIGURE 7-1: SPACE CLEARANCES
Selecting a location
INSTALLATION
Electrical
service panel
FIGURE 7-2: D77 CONTROLLER
18"
(457mm)
minimum
18" (457mm)
recommended
Inlet side

8CDS DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
PARTS
INCLUDED
IN KIT
90-2533
90-2532
FIGURE 8-1: FLOOR MOUNTING USING LEVELING FEET KIT (PART #: 601175)
FLOOR MOUNTING
The leveling feet kit (not included) is required for floor mounting. The drain
hose/pipe must continuously slope downward toward the drain. Use solid
supports as needed to elevate the unit enough to allow for continuous drain
slope. Use the adjustable feet to level the unit right to left and front to back so
that unit drains properly.
Mounting
INSTALLATION
Blocking must be used for p-trap clearance
3-1/4" (83 mm)

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CDS DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
INSTALLATION
90-2531
90-2531
Mounting
HANGING THE DEHUMIDIFIER
Use 3/8" (10 mm) or 1/2" (12 mm) threaded rod to suspend the unit from
appropriate ceiling structure (see Figure 9-1). The unit weight is 360 lbs
(163 kg). Install vibration isolators if located in an area where noise could be
a concern. Level unit right to left and front to back so that unit drains properly.
IMPORTANT: Install lock nuts to secure the dehumidifier to the threaded rod as
shown in Figure 9-2.
DUCTING
Use duct kit (Part #: 601177) for installing ductwork to the dehumidifier.
Reference the instructions provided with the duct kit for installation details.
FIGURE 9-1: SUSPENSION
FIGURE 9-2: SECURE BRACKET TO DEHUMIDIFIER
Double nut each corner with flat
washer per illustration
4X vibration
isolators
(optional)

10 CDS DEHUMIDIFIER INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
3/4" MNPT X 3/4"
FEMALE PIPE
(INCLUDED)
P-TRAP
(INCLUDED)
3/4" PIPE X 3/4" PIPE COUPLING
(NOT INCLUDED)
PVC HARD PIPE
(NOT INCLUDED)
3/4" PIPE TEE
(INCLUDED)
3/4" MNPT X 3/4"
FEMALE PIPE
(INCLUDED)
P-TRAP (INCLUDED)
3/4" FEMALE PIPE X 3/4" FNPT (INCLUDED)
3/4" MNPT X 3/4" BARB (NOT INCLUDED)
3/4" FLEXIBLE TUBE
(NOT INCLUDED)
HIGHER
THAN
FILTER
FRAME
OPTIONAL
VACUUM
BREAK
3/4" MNPT X 3/4"
FEMALE PIPE
(INCLUDED)
P-TRAP
(INCLUDED)
3/4" PIPE X 3/4" PIPE COUPLING
(NOT INCLUDED)
PVC HARD PIPE
(NOT INCLUDED)
3/4" PIPE TEE
(INCLUDED)
3/4" MNPT X 3/4"
FEMALE PIPE
(INCLUDED)
P-TRAP (INCLUDED)
3/4" FEMALE PIPE X 3/4" FNPT (INCLUDED)
3/4" MNPT X 3/4" BARB (NOT INCLUDED)
3/4" FLEXIBLE TUBE
(NOT INCLUDED)
HIGHER
THAN
FILTER
FRAME
OPTIONAL
VACUUM
BREAK
90-2534
The blower draws air through the dehumidifier, putting the cabinet under
negative pressure. As a result, the included P-trap is required for proper
draining. The installed drain fitting on the dehumidifier is 3/4" (DN20) FNPT.
Use the included fittings to trap and install the drain. See Figure 10-1. The
drain tubing can be hard pipe or flexible tubing. NOTE: PTFE thread seal tape
is recommended for the threaded connections and hand tighten only. Use PVC
primer and cement for all slip fit connections to prevent leaks. After installing
the drain connections, trap, and tubing, pour enough water, about 32 oz.
(950 mL) into the dehumidifier drain pan to prime the trap.
If the drain tubing will be installed to a condensate pump, or if a common
drain tube will serve multiple dehumidifiers or air conditioners, a vacuum
breaker is recommended to prevent the p-trap from being unintentionally
siphoned. Install a T-fitting with a short section of drain tubing pointed vertically
and extending above the start of the filter (see Figure 10-1). Install the
vacuum breaker after the P-trap.
Drain installation
FIGURE 10-1: DRAIN ASSEMBLY
INSTALLATION