ARID-Dry MS-1200 Manuel

3rd edition edited 6/27/17

MS-1200

DESICCANT DEHUMIDIFIER

INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS

5931 Ford Court

Brighton, MI 48116

810/229-7900

[email protected]

www.ctrdh.com

Table of Contents

Subject Page Number

Read this Manual ............................................................................................................................1

Principle of Operation ......................................................................................................................1

Machine Set-Up ..............................................................................................................................1

Operating Instructions......................................................................................................................2

Controls............................................................................................................................................3

Maintenance Instructions ..............................................................................................................7-8

Spare Parts List................................................................................................................................9

Wiring Schematic ..........................................................................................................................10

Unit Outline …………………………………………………………………………………………………11

READ THIS MANUAL

This manual is provided for the MS-1200 dehumidifier so the user can gain a thorough

understanding of the proper set-up, operation, and maintenance. This dehumidifier is built

around tested engineering principles and has passed a thorough inspection for quality of

workmanship and function. A thorough understanding of the set-up, operation, and

maintenance of this equipment will allow it to provide maximum performance and

reliability.

PRINCIPLES OF OPERATION

The MS-1200 is a self-contained desiccant dehumidifier designed to efficiently remove

water vapor from the air. A portion of the desiccant rotor is exposed to the “process” air

effectively adsorbing moisture while the second portion of the rotor is exposed to heated

“reactivation” air effectively removing the adsorbed moisture. This process is done on a

continuous basis, providing constant dehumidified process air.

MACHINE SET-UP

Carefully remove the machine from its shipping carton.

Thoroughly inspect the machine for shipping damage. Should any damage be found,

report the damage to the freight company immediately.

Carefully place the machine on a level surface within the space to be dried.

Connect 10” hoses to the process inlets and outlets as required for the drying project.

Connect 10” hoses to the reactivation inlet and outlet as required for the drying project.

CAUTION- Do not pinch or kink the hoses. Blockage of the hoses will result in reduced

airflow and moisture removal capacity.

Check to ensure the machine is turned “off” prior to connecting power. Circuit breakers

are provided in the control enclosure. Check that they are switched “on” once power is

applied.

Connect an appropriate power cord and locking connector to the flanged inlet receptacle

provided at the rear of the machine. The cord should be connected to 220vac power with

either a 30a breaker or fuse with proper grounding for operation at “low”, 50a breaker or

fuses for operation at “high”.

OPERATION

Machine operation is fully automatic and requires no adjustments to airflow or other

primary functions.

A “POWER ON” lamp is provided to indicate that power is applied to the machine.

A “RUN” lamp is provided to indicate that the unit is operational. This lamp will be

illuminated when the “ON-OFF” switch is in the “ON” position.

Position the “HIGH/LOW” switch to match the appropriate power supply (50a High, 30a

Low).

Position the “HUMIDISTAT”switch to “BYPASSED”.

Turn the “ON-OFF” switch to the “ON” position. The machine will start operating. At this

point, both fans, reactivation heaters, and rotor drive will be operational.

If humidity control is desired to prevent over drying, a flanged receptacle is provided for

a remote humidity sensor. Connect the appropriate plug and humidity sensor with dry

contacts only-DO NOT APPLY VOLTAGE TO THIS CIRCUIT.

Position the “HUMIDISTAT” switch to “CONTROL ON”. The reactivation fan, heater, and

drive circuit will now cycle on and off from the humidistat input.

An hour meter is provided to track time of operation for to aid in scheduling inspection

and maintenance.

CONTROLS/ELECTRICAL

The controls in this machine are UL listed and provide for automatic operation and all

required protection of the machine components. Access to the control panel is via the

control cover located on top of the machine.

Air flow is accomplished using internal motorized impellers for process and reactivation

air. The process fan will operate any time the “ON-OFF” switch is in the “ON” position.

The reactivation air fan, heaters, and drive motor will operate when the “HUMIDISTAT”

switch is in “BYPASSED” or via humidity control when the switch is in the “CONTROL

ON” position.

A fractional hp gear motor drives the desiccant rotor.

Self-regulating PTC heater elements provide the “heat source” for reactivation.

MAINTENANCE

This machine is designed for minimal maintenance and years of trouble free service.

Clean the exterior of the machine with a damp cloth and mild soap if necessary.

DO NOT use a garden hose or pressure washer to clean this machine!

Occasionally inspect internal components for loose fasteners or damage from handling.

Inspect the flanged power inlet, connector, and cord for damage.

Check to ensure all access panels are in place and secure.

Air Inlet Filters Process: 12x24x2” pleated

React: 10x10x2” pleated

Filter access is accomplished by removing filter access covers for both the process and

reactivation filter.

Inspect filters regularly and replace if dirty. Regular air filter maintenance is critical to

extending the life of the desiccant rotor and moisture removal efficiency.

Keeping filters clean is the most important long term maintenance on this machine!

In dusty or dirty environments, the filter replacement interval will be greatly reduced. The

hour meter provided can be used to establish a filter replacement interval.

Motorized Impellers (blowers)

The motorized impeller motors provided in this machine require no maintenance. They

are sealed and permanently lubricated.

Desiccant rotor drive system

The rotor drive system consists of a fractional hp gear motor, timing pulley, timing belt,

and spring tensioner. The gear motor is sealed and permanently lubricated. Check the

motor fasteners and timing pulley to be secure. Inspect the timing belt for cracks, tears,

or abrasion. The tensioner should keep slack form the belt with light tension.

Rotor Seals

Periodically inspect the rotor seals for damage, tears, or gaps.

Reactivation Electrical Heaters

The heating elements are self-regulating PTC type and require no maintenance.

Heating surfaces of element are “live” conductors.

DO NOT TOUCH ELEMENTS WITH POWER APPLIED!

Unit dolly wheels

The bearings in the dolly wheels are pre-lubricated and require no maintenance.

SERVICE *

*Service of this machine should be performed by qualified personnel only.

Should questions arise, please contact Controlled Dehumidification at the number on the

front of this manual.

This machine is equipped with full perimeter service covers on both sides of the machine

for easy access for inspection, maintenance and service.

Note:

The process filter access cover must be removed prior to removing the service access

cover.

Process and React Fan Replacement

Disconnect power to the machine

Disconnect the fan wire spade terminals and remove the 3 hex nuts attaching the

motor/motor plate to the support studs.

Slide the assembly out of the machine.

Remove the fan from the mounting plate and install the new fan onto it.

Reverse removal procedure for installation.

Rotor Replacement

Disconnect power from the machine.

Remove the drive belt from the tensioner roller to slack it.

Remove the two ¼-20 machine screws from the center of dividing panels at each face of

the rotor.

Carefully slide the rotor from the machine, using the belt to pull it.

The rotor shaft and top and bottom spacers will be loose.

Remove them as soon as they clear the dividing panels. They will be re-used.

Remove seal/drive bands from the perimeter of the rotor. They will be re-used.

Perimeter Seal Replacement

Verify length of new seals by wrapping around rotor, allowing for 1” of overlap.

Trim the ends of one edge of the seal with a small radius, overlap by 1-1/4” and staple

overlap in two places.

Prepare a second seal with the overlap opposite direction of the first.

Install new seals loosely on the rotor, overlap tabs pointing in direction of rotation, flush

with the face so they do not protrude.

Install the seal/drive bands around the rotor, on top of the seal, fingers pointing toward

each other.

Tighten the clamping screws so that the bands are snug, but not tight.

Install rotor, shaft and spacers with the rotor positioned so that the gap between the rotor

and rotor panel are even all the way around.

Tighten the cap screws securing the rotor shaft to the dividing panel.

Press the perimeter seals and drive bands toward the rotor panels, working around the

perimeter until the seals are uniformly cured toward the panels, approximately ½” of the

seal/clamp on the rotor.

Apply a bead of Silicone RTV to the joint where the inner edge of the seal, band, and

rotor perimeter band meet. Allow to cure prior to placing the rotor in service.

Dividing Seal Replacement (4 ea.)

Disconnect power from the machine.

Remove the screws attaching the seal retention strips and seals to the dividing panels.

Cut the new seal material to match the original seal length and end profile (left and right).

Install the new seal with retention strip and screws.

Drive Belt Replacement

Disconnect power from the machine.

Remove the two ¼-20 machine screws from the center of dividing panels at each face of

the rotor.

Shift the rotor position off to one side to clear the center shaft of the divider panel.

Carefully slip the belt through the perimeter seal on top of the rotor, past the center shaft,

spacers and around the perimeter of the rotor.

Position the rotor and shaft back into place and tighten the cap screws through the

dividing panel.

Drive Motor Replacement

Disconnect power from the machine.

Disconnect the spade terminals on the motor wire leads.

Remove the drive belt from around tensioner pulley and pulley.

Loosen the set screws in the drive pulley and remove it from the motor shaft.

Remove the 4 screws attaching the motor and remove the motor.

Reverse procedure to install.

Dolly Wheel Replacement

Drill a small hole (1/4-3/8”) in the center of one of the push nut caps retaining the wheel

axle in the dolly.

Use a center punch and hammer to drive the shaft out of the cap.

Slide the shaft from the dolly frame, noting position of the wheel spacers.

Install new wheels by inserting the axle and spacers as required, pushing the axle

through the far side of the frame.

Using a block of wood to support the installed push cap, lightly tap the new cap securely

onto the axle.

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