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5

Figure 7. Suspended Installation

FILTER ACCESS DOOR

5/8"

INLET

OUTLET

VIBRATION

ISOLATORS

2-1/8" CLEARANCE

FOR LEVELING FEET

90-1951

The dehumidifier must use a field supplied drain trap. Use 

Lennox trap Catalog No. 49P66 or 91P90 or any 3/4" PVC 

SCH 40 P- or J-trap. The trap must have a depth of 2". The 

use of blocks under the dehumidifier may be necessary to 

provide clearance.

DRAIN INSERT

90-2607

Drain Installation – Model HCWHD4-080 

and HCWHD4-100

The drain outlet on the dehumidifier can be hard piped 

using a 3/4" PVC Slip x 3/4" MNPT fitting. Always maintain a 

constant downward slope from the dehumidifier to the drain.

NOTE:

 PTFE thread seal tape is recommended for the 

threaded connection and 

hand tighten only

. Remove drain 

insert before priming and gluing in the PVC fitting. Replace 

drain insert after PVC glue has fully dried.

 CAUTION

Do not damage drain insert. The drain insert is a critical 

feature of the dehumidifier drain management system.

 WARNING

Running the dehumidifier without the drain insert can 

lead to condensate leaks. See 

Figure 8.

Figure 8. Drain Insert

Figure 9. Drain Trap

CLEAN OUT

PRESS IN

(DO NOT GLUE)

VENT

TO APPROVED

DRAIN

TRAP

DEPTH

2"

(51 mm)

VENT MUST EXTEND ABOVE HEIGHT OF 

COIL DRAIN PAN BY 2 INCHES (51 mm)

1" x 3/4" x 3/4"

REDUCING TEE 

WITH PLUG

LENNOX P-TRAP 

49P66, J-TRAP 

91P90, OR ANY 

3/4" PVC SCH 40 

P- OR J-TRAP

DRAIN LINE SHOULD SLOPE A MINIMUM 

OF 1 INCH PER 10 FEET (25 mm per 3 m)

Summary of Contents for HCWHD4-080

Page 1: ... a person responsible for their safety 8 Children should be supervised to ensure that they do not play with the appliance 9 If the supply cord is damaged it must be replaced by a special cord or assembly available from the manufacturer or its service agent Table of Contents Safety Instructions 1 Specifications 2 Packaging Content 2 Set Up Dehumidifier for Installation 3 Duct Collars 3 Control Loca...

Page 2: ...on 50 F 104 F 40 F dew point minimum Ventilation 40 F 140 F 0 RH 99 RH non condensing Filter MERV 8 washable Airflow External Static Pressure w c Airflow CFM External Static Pressure w c Airflow CFM External Static Pressure w c Airflow CFM 0 0 185 0 0 280 0 0 310 0 2 135 0 2 245 0 2 270 0 4 85 0 4 210 0 4 225 0 6 175 0 6 175 0 7 160 Maximum design external static pressure Packaging Content 1 Dehum...

Page 3: ...ion not being used See Figure 2 Make sure there are no bends in the duct coming off the outlet for a minimum of 4 This will ensure that the duct will not interfere with the backflow damper function Figure 1 Remove Shipping Bracket Figure 2 Fully Ducted Installations OUTLET COVER OUTLET DUCT COLLAR W BACK DRAFT DAMPER MOVE OUTLET COVER AND INSTALL OUTLET DUCT COLLAR TO TOP DISCHARGE LOCATION INLET ...

Page 4: ...s will require the removal of the side panel shown Allow sufficient space for service on this side of the unit If locating the unit in an attic or crawl space a Lennox communicating thermostat or iComfort E30 and M30 CS7500 or a Y6456 Wall Mount Dehumifider Control mounted in the living space is recommended For attic installations it is recommended that the dehumidifier be suspended Always install...

Page 5: ...ifier to the drain NOTE PTFE thread seal tape is recommended for the threaded connection and hand tighten only Remove drain insert before priming and gluing in the PVC fitting Replace drain insert after PVC glue has fully dried CAUTION Do not damage drain insert The drain insert is a critical feature of the dehumidifier drain management system WARNING Running the dehumidifier without the drain ins...

Page 6: ...readed connection and hand tighten only The dehumidifier must use a field supplied drain trap Use Lennox trap Catalog No 49P66 or 91P90 or any 3 4 PVC SCH 40 P or J trap The trap must have a depth of 2 The use of blocks under the dehumidifier may be necessary to provide clearance Figure 12 Level the Unit 0 38 MIN 2 00 MAX 3 4 FNPT DRAIN 90 1885 Figure 10 Level the Unit 0 38 MIN 2 00 MAX 3 4 DRAIN ...

Page 7: ... Grilles with 10 Duct Collars Ducting Notes Use insulated duct when the dehumidifier is located in an unconditioned space such as an attic or a garage Use a minimum of 12 of flex duct at the dehumidifier inlet and outlet to prevent vibration noise transmission When ducting return to supply allow adequate space before the first branch duct to ensure the warm dehumidified air is thoroughly mixed wit...

Page 8: ...he dehumidification needs of the Primary Zone have been satisfied NOTE Dehumidifier controls will not work with iHarmony Zoning Systems IMPORTANT Normally Closed dampers must be installed in the ducts serving the Primary Zone and Normally Open dampers installed in the ducts serving the Secondary Zone Required Components 10 Duct and Fittings Grilles with 10 Duct Collars Drain Line Y6451 Zoning Kit ...

Page 9: ...ute minimum on and off time NOTE All Lennox thermostats use reverse logic for dehumidification There is 24VAC between the DH and C terminals when there is no call for dehumidification Figures 21 22 show relay position when there is a call for dehumidification and 0VAC between the DH and C terminals Figure 21 24VAC Thermostat Connections Figure 22 Communicating Thermostat Connections Figure 20 Lenn...

Page 10: ...ng used If an external control is used in a zoned application it must be located in the Primary Zone refer to TWO ZONE PRIMARY AND SECONDARY zoned installation on page 15 for details NOTE When using an external control there is a 3 minute delay at start up or whenever power is cycled to the dehumidifier CRAWL SPACE SEALED ATTIC CONTROL Used as crawl space or sealed attic control or wired remote co...

Page 11: ...t be wired to the HVAC system to prevent short circuiting dehumidified air directly back to the dehumidifier inlet In return to supply ducting configuration running the HVAC fan with the dehumidifier ensures the warm dry air is mixed with room air before being discharged to the home NOTE Make sure the external static pressure does not exceed the maximums shown on page 2 and disable dehumidificatio...

Page 12: ...to go to the ZONE screen selections System Set up and Checkout If dehumidifier installation does not include ventilation or zoning and will not be wired to an external control remote control or the HVAC system proceed to INSTALLER TEST MODE section on page 14 1 Check all wiring 2 Make sure the wire access cover has been snapped back onto the on board control 3 Plug unit in and turn power switch to...

Page 13: ...ion select DISABLED and press MODE to go to the EXTERNAL control screen selections 90 1854 If installing the dehumidifier in a two zone application use the UP or DOWN arrows to select ENABLED and press MODE to go to the EXTERNAL control screen selections EXTERNAL CONTROL 90 1854 If using the dehumidifier on board control select DISABLED and press MODE to go to the dehumidification with air conditi...

Page 14: ... and TEST will show on the display If wired to the HVAC system the HVAC blower will turn on and if there is are damper s wired to the DEH DAMPER terminals of the control the damper s will energize 90 1854 After three 3 minutes the dehumidifier compressor will turn on and DEHUMIDIFYING will replace AIR SAMPLING on the control screen 90 1854 90 1854 After one minute of compressor operation all outpu...

Page 15: ...to show that the Y6456 is calling for dehumidification The dehumidifier and HVAC blower if on will turn off when the RH measured by the Y6456 drops 3 RH below the setting CRAWL SPACE OR SEALED ATTIC REMOTE CONTROL USING Y6456 1 Press the ON OFF button to turn the dehumidifier control ON REMOTE will show on the display to indicate that a remote control is wired to the dehumidifier 2 At the Y6456 pr...

Page 16: ...entilation is only allowed during a HVAC heat call Vent Auto C Ventilation prevented when outdoor temperature is below 0 F and above 100 F Vent Auto D Ventilation prevented when outdoor temperature is below 0 F and above 90 F Between 0 F 40 F ventilation is only allowed during a HVAC heat call Vent Auto B C D modes apply outdoor temperature limits and require the 58N66 Outdoor Temperature Sensor t...

Page 17: ...ne Fresh Air Delivery Rate 1 Measure the negative static pressure of the return system at the location where the fresh air intake duct enters the return duct or dehumidifier inlet 2 See Table 2 for estimated inlet airflow in CFM based on duct type length and available negative pressure Use an airflow measuring device for a more accurate airflow delivery rate 3 Record the delivered CFM ________ Fig...

Page 18: ...40 INSTALLER SETTINGS 90 1854 With the dehumidifier power switch on press the ON OFF button to turn the dehumidifier off 90 1854 Press and hold the MODE button for 3 seconds to access the installer settings menu Press and release the MODE button repeatedly until the VENT DISABLED screen appears 90 1854 Press the UP or DOWN button to ENABLE ventilation then press the MODE button to set Timed or Aut...

Page 19: ...ting the dehumidifier compressor will turn on to remove moisture Ventilation with an External Control When an external control is installed the dehumidifier will open the ventilation damper only when there is a cooling call Y or when the dehumidifier is operating unless the ventilation need has not been met If the set amount of ventilation time has not been met before the end of the one hour cycle...

Page 20: ...and ON the humidity measured by the internal sensor while also displaying RH and ON and the frost sensor temperature while also displaying ON Scroll through these values and by using the UP DOWN arrow buttons 7 Record values and call Technical Support Cycle Power E5 High Temperature Thermistor Failure 1 Check the high temperature sensor connection at the power board Terminal should be fully seated...

Page 21: ...4 VAC transformer If wired for Two Zone operation verify that 24 VAC transformer is 40 VA minimum Check all wiring connections between dampers and control board Verify the normally closed dampers are in the Primary Zone duct system and the normally open dampers are in the Secondary Zone duct system The ventilation damper does not open when the HVAC fan is active Cycle time has been met The damper ...

Page 22: ...L GRN BLK BLK WHT BLK WHT N L WHT BLU RED YEL YEL BLK WHT BRN WHT BLK WHT BLK RED FAN B C COMPRESSOR PCB ASSY INTERNAL CTRL SWITCH ON OFF WIRE HARNESS POWER POWER CORD USER INTERFACE ASSY CAPACITOR COMPRESSOR CAPACITOR FAN SENSOR LOW TEMP SENSOR HI TEMP Wiring Schematic HCWHD4 080 HCWHD4 100 or HCWHD4 130 B2206629B ...

Page 23: ...63 8 Backflow Damper 10 Deh Y6464 9 Inlet Duct Panel Deh Y6465 10 Cover Outlet Deh Y6466 11 Fan 80pt Deh 22H29 Fan 100pt Deh 22H28 No Description Catalog No 12 Wire Harness Power Deh 22H27 13 Sensor Low Temperature Deh Y6470 14 Sensor High Temperature Deh Y6471 15 Leveling Foot Deh Y6472 16 Capacitor Run 50μF Y6473 17 Capacitor 6MFD 250VAC 80pt Deh 22H25 Capacitor 12MFD 450VAC 100pt Deh Y6475 18 D...

Page 24: ...60 5 Hole Cover UI Ctrl Deh Y6461 6 Door Filter Access Deh Y7121 7 Outlet Duct Panel Deh Y6463 8 Backflow Damper 10 Deh Y6464 9 Inlet Duct Panel Deh Y6465 No Description Catalog No 10 Cover Outlet Deh Y6466 11 Fan 130pt Deh with 10MFD Capacitor Y7122 12 Wire Harness Power Deh Y6469 13 Sensor Low Temperature Deh Y6470 14 Sensor High Temperature Deh Y6471 15 Leveling Foot Deh Y6472 16 Capacitor 50MF...

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