Table of Contents
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OPERATING AND MAINTENANCE MANUAL
Section 1
a)
Operating and Maintenance Text
Section 2
a)
General Arrangement Drawing ................................................................................... 74119
b)
Wiring Diagram 208-240 /1/ 50/60 .............................................................................. 50339
c)
Wiring Diagram 208-240 /3/ 50/60 .............................................................................. 50340
d)
Wiring Diagram 380-415 /3/ 50/60 .............................................................................. 50341
e)
Wiring Diagram 460 /3/ 50/60 ..................................................................................... 50342
f)
Wiring Diagram 208-240 /3/ 50/60 .............................................................................. 50344
Section 3
a)
Replacing Fusible Links
b)
Humidistat Field Connections ..................................................................................... 26992
c)
Blastgate Installation Instructions ............................................................................... 27110
d)
Recommended Spare Parts List ................................................................................ 21239
MODEL: HC-300 / DEW-300
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Summary of Contents for Munters HC-300
- Page 1 OPERATING AND MAINTENANCE MANUAL MODEL: HC-300 / DEW-300 Section 1 Operating and Maintenance Text Section 2 General Arrangement Drawing ................... 74119 Wiring Diagram 208-240 /1/ 50/60 ................50339 Wiring Diagram 208-240 /3/ 50/60 ................50340 Wiring Diagram 380-415 /3/ 50/60 ................50341 Wiring Diagram 460 /3/ 50/60 ..................
- Page 2 OPERATING AND MAINTENANCE MANUAL MODEL HC-300 DEHUMIDIFIER Rev 6.0 1/21...
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Page 4: Table Of Contents
TABLE OF CONTENTS HC-300 SECTION 1 — INTRODUCTION ............... PAGE 1-1 1.1 Dehumidifier Operating Principle ..............1-1 1.2 About the HC-300 ..................1-2 1.3 Controls and Indicators ................1-3 1.4 Protective Circuits ..................1-4 SECTION 2 — SAFETY NOTES .................. 2-1 SECTION 3 — INSTALLATION AND START-UP ............3-1 3.1 Inspection ..................... - Page 5 Dimensions ....................3-1 Fig. 3-2 HC-300 Installed in Process Space ............3-2 Fig. 3-3 HC-300 Installed Outside of Process Space ..........3-3 Fig. 3-4 HC-300 Installed with Existing Air-Handling Unit ........3-4 Fig. 3-5 Do Not Install HC-300 This Way ..............3-5...
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Page 6: Section 1 - Introduction
When the desiccant is heated, it releases the moisture again. Let’s say that you want to dry the air in a storage room, using the HC-300. Damp “pro- cess” air is pulled into the unit from the storage room. The desiccant in the Honey- Combe wheel picks up most of the moisture in the air. -
Page 7: About The Hc-300
1.2 ABOUT THE HC-300 This is a simplified explanation of the operating principle. Figure 1-2 shows how we put this principle to work in the HC-300. You can still see the parts we discussed in the last Figure – the HoneyCombe wheel, process air stream and reactivation air stream. -
Page 8: Controls And Indicators
® Figures 1-3 and 1-4 show some additional parts on the HC-300 unit. The HoneyCombe wheel is turned by a small drive motor and a toothed belt. A spring-type tensioner automatically adjusts the belt tension. 1.3 CONTROLS AND INDICATORS The unit has four indicators and controls on the control panel:... -
Page 9: Protective Circuits
The wiring for each heating element includes a fusible link. This link will open if the element overheats. If this happens, the HC-300 will continue to operate, but will not dehumidify the process air. To correct this, find the cause of the overheat condition and replace the fusible link. -
Page 10: Section 2 - Safety Notes
Munters is concerned about the safety of anyone who uses or services the HC-300 unit. Some of the parts inside the HC-300 can be dangerous if an untrained person tries to service the unit. Throughout this manual, we have pointed out some of the hazards which may occur in the use of the HC-300. - Page 11 Don’t place the HC-300 unit outdoors. The cabinet is not weather- proof. If the unit is mounted outdoors, water may drip into the electrical parts. This may cause an electrical shock hazard. The two blowers inside the HC-300 spin very quickly. Your hand may be hurt if you put it inside a blower while it is turning.
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Page 12: Section 3 - Installation And Start-Up
• Ensure that the process and reactivation air filters are in place. 3.2 POSITIONING THE UNIT Figure 3-1 shows the dimensions of the HC-300 unit. You must allow three clear- ances around the unit: • a 24" space in front of the unit so you can remove and replace the ®... - Page 13 5 feet. Allow the same distance between the inlet and outlet for the reactivation air. Figure 3-4 shows the set-up if you are installing the HC-300 in a system with an existing air-handling unit. Notice that both sides of the HC-300 are connected up- stream of the air-handling unit.
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Page 14: Connecting The Ductwork
FIGURE 3-3 HC-300 INSTALLED OUTSIDE OF PROCESS SPACE Do not connect the HC-300 so that it bypasses the air-handling unit. See Part A of Fig. 3-5. If you connect the ductwork this way, some of the air from the air-handling unit may be forced back through the HC-300, and the HC-300 will not be able to work correctly. - Page 15 FIGURE 3-4 HC-300 INSTALLED WITH EXISTING AIR-HANDLING UNIT Here are details on the duct connections: Process intake if no ducting – allow 12" clearance optional fitting for 8" round ductwork is available Process outlet connection to 8" round ductwork add damper downstream of outlet Reactivation intake if no ducting –...
- Page 16 PART A PART B FIGURE 3-5 DO NOT INSTALL THE HC-300 THIS WAY...
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Page 17: Electrical Connections
Electrical connections should only be made by a licensed electrician. Check all contacts for tightness after 60 days of operation. The HC-300 is designed to operate on single-phase or three-phase AC at 208 to 480V. (Check the nameplate in the unit for the correct voltage and phase.) The customer must provide a disconnect switch on the AC line. -
Page 18: Adjusting The Dampers
3.6 ADJUSTING THE DAMPERS As shown in Fig. 3-2, 3-3 or 3-4, you should install dampers in the outlet ducts for both the process and reactivation air streams. On the reactivation outlet, mount the assembly horizontally so the damper moves side-to-side, not up-and-down. Open both of the dampers. -
Page 20: Section 4 - Preventive Maintenance
The HC-300 unit requires very little regular maintenance. Check these points every 30 days: 4.1 CLEAN THE AIR FILTERS The HC-300 unit includes two air filters. These are shown in Fig. 1-4. Each filter is made of expanded aluminum, mounted in a metal frame. -
Page 22: Section 5 - Troubleshooting
5.1 POSSIBLE TROUBLE CONDITIONS In order to check most of these trouble conditions, the HC-300 must be turned on and operating, or trying to operate. Some units are wired with remote humidistats. With this type of set-up, it is sometimes not clear whether the humidistat is trying to turn on the HC-300. -
Page 23: Reactivation Outlet Temperature Is Too Low
One of the heating elements may have stopped working. See the section on “Checking the Heating Elements.” A low outlet temperature can also be caused by a problem with the reactivation blower. Turn off the HC-300 and try to spin the blower by hand. It should turn freely. -
Page 24: Poor Dehumidifying Performance
There may be a problem with the thermistor which controls the solid state power control (TSE1) See the section on “Checking the Thermistors.” There may also be a problem with the power control itself (SSP1) Substitute a new part. 5.5 POOR DEHUMIDIFYING PERFORMANCE Check the two intake filters, shown in Fig. 1-4. If these filters are dirty, clean them as described in the section on “Cleaning the Air Filters.”... -
Page 25: Checking The Heating Elements
5.7 CHECKING THE HEATING ELEMENTS This service procedure involves an electrical hazard. Service work should only be done by an electrician who has been qualified by Munters. The heating elements are located near the intake for the reactivation air. See Fig. -
Page 26: Checking The Humidistat
You should see 0 Volts across the contacts. You can also check the wiring between the humidistat and the HC-300. The humidi- stat is connected to terminals on the printed circuit board. When the humidistat is not calling for dehumidification, you should see 24 V AC across the contacts. - Page 27 This will permanently damage the wheel. 11. If the wheel is still plugged, or if the honeycomb structure has softened, please call the Service Operations Department at Munters. 12. To replace the wheel, reverse Steps 2 through 6 above.
- Page 28 Model HC-300 Dehumidifier Applies to HC-300 units beginning with serial number 7175 This section includes information which applies to HC-300 units which have had the pressure differential switch installed. The information below applies to sections in the basic "Operating and Maintenance Manual - Model HC-300 Dehumidifier".
- Page 29 • The setpoint for the pressure differential switch is set at the factory. The setpoint should not be adjusted. Unauthorized changes to the setpoint may damage the HC-300 and/or void the warranty. Added to Section 5.5 - Poor Dehumidification Performance •...
- Page 36 Replacing Fusible Links Revision 7-11...
- Page 37 10. ASSEMBLE NEW FUSE SUB ASSEMBLY. CRIMP THE NON INSULATED FEMALE TERMINALS TO BOTH SIDES OF THE FUSE. 11. REMOVE FUSE ASSEMBLY FROM HEATER BY PULLING STRAIGHT OUT ON THE UNINSULATED FEMALE TERMINALS. 12. REPLACE FUSABLE LINK WITH NEW FUSE SUB ASSEMBLY BY REINSTALLING FEMALE TERMINALS TO SYSTEM TABS.
- Page 38 HC-150 and HC-300 Humidistat Field Connections HUMIDISTAT (VICONICS) HSP1 Input Plug All Dashed Wiring by others HC-150 / 300 HSP1 Input Plug Regin Humidistat p/n 90485-xx HUMIDISTAT HSP1 Input Plug Regin All Dashed Wiring by others 26992, Rev. 3, 10/11/2018...
- Page 39 Direct Connect to HC-150/300 Circuit Board HUMIDISTAT (VICONICS) Board Ground lug or mounting post PCB1 All Dashed Wiring by others Main Unit Circuit Board HUMIDISTAT (ROTRONICS SF-D65) HSP1 Input Plug All Dashed Wiring by others 26992, Rev. 3, 10/11/2018...
- Page 41 21239 Recommended Spare Parts List HC-300 MODEL: HC-300 DESCRIPTION QTY REQ WHEELS (REPLACEMENT KITS) SIGEL (Titanium Enhanced Silica Gel) 30146-12 SEALS SEAL KIT, UPPER & LOWER 43552-02 MOTORS DRIVE MOTOR (S/N J92>) 92483-01 220V BELTS DRIVE BELT 91626-03 FILTERS PROCESS IN...