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Lennox 021 - page 1
02/06 505,021M *2P0206* *P505021M* E 2006 Lennox Industries Inc. Dallas, T exas, USA Humiditrol ® EDA Series Unit The Dave Lennox Signature t Collection Humiditrol ® En- hanced Dehumidification Accessory (EDA) is designed for installation with a Lennox R−410A split−system out door unit an d an air handler or a furnace with a variable speed bl ...
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Lennox 021 - page 2
Page 2 EDA 01/06 W ARNING This cased product contains fiberglass wool. Dis- turbing the insulation during inst allation, mainte- nance, or rep air will expose you to fiberglass wool dust. Breathing this may cause lung cancer . (Fiber- glass wool is known to the St ate of California to cause cancer .) Fiberglass wool may also cause respiratory , ski ...
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Lennox 021 - page 3
Page 3 EDA INST ALLA TION/ SERVICE INSTRUCTIONS Installation Dimensions and Arrangement Figure 1 AIR FLOW AIR FLOW UP-FLOW FURNACE UP-FLOW AIR HANDLER EDA−024B: 12−1/2 EDA−036C: 12−1/2 EDA−060D: 14 V aries by indoor coil model; see LENNOX Engineering Handbook. V aries by air handler model; see LENNOX Engineering Handbook for dimensions. 4 ...
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Lennox 021 - page 4
Page 4 EDA 01/06 Component Functions Charge Compensator The charge compensator (shown i n figure 5) serves to maintain the proper amount of refrigerant circulating in larger systems. [Some systems do not require a charge compensator , but do require a simi- lar kit to connect into the system (see Engineering Hand- book)] The charge compensator s ...
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Lennox 021 - page 5
Page 5 EDA INST ALLA TION/ SERVICE INSTRUCTIONS General Installation Information W ARNING Improper installation, adjustment, alteration, ser- vice or maintenance can cause personal injury , loss of life, or damage to property . Installation and service must be performed by a qualified installer or service agency . The EDA unit may be used in upflow ...
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Lennox 021 - page 6
Page 6 EDA 01/06 Required Part s (all applications) EDA Unit, with check/flow restrictor & label Appropriate SignatureS t at t Thermostat 46M98 − Outdoor Sensor 84X49 − T wisted Pair Wire Appropriate Insulation and Piping Kit Required Part s (2−St age Heat Pump appl.) 12P61 − 75V A T ransformer (for HP applications) Installation Process ...
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Lennox 021 - page 7
Page 7 EDA INST ALLA TION/ SERVICE INSTRUCTIONS INDOOR UNIT OUTDOOR UNIT air−flow V apor Line Liquid Line Liquid Line from Outdoor Unit Liquid Line to Indoor TXV TXV V apor Line Liquid Line MUST BE INSULA T ED MUST BE INSULA TED EDA CHARGE COMPENSA TOR 7/8 X 7/8 X 3/8 TEE UPFLOW POSITION Electrical Inlet T o Charge Compensator side connection (so ...
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Lennox 021 - page 8
Page 8 EDA 01/06 Leak T esting, Evacuating, Charging IMPORT ANT The 3−way diverting valve actuator shaft set screw (see f i gure 7) is factory set and is not to be adjusted. 3−way Diverting V alve Operation NOTE − During system operation, the 3-way valve requires 24-volt power to drive between cooling and dehumidifica- tion. Th e 3−way dive ...
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Lennox 021 - page 9
Page 9 EDA INST ALLA TION/ SERVICE INSTRUCTIONS Insulating and Sealing the Unit IMPORT ANT All piping, metering devices, and connections must be insulated to prevent moisture damage caused by sweating. Seal the unit so that warm air is not allowed into the cabi- net. This is especially import ant when the unit is inst alled in an unconditioned area ...
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Lennox 021 - page 10
Page 10 EDA 01/06 EDA Unit Operation Th e EDA coil is added to an HV A C system downstream of th e indoor coil. In dehumidification mode, the coil becomes an extension of the condenser coil and injects heat into the indoor air stream. This dehumidification mode allows significantly improved control of the humidity in the conditioned space without o ...
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Lennox 021 - page 11
Page 1 1 EDA INST ALLA TION/ SERVICE INSTRUCTIONS Cooling Mode (Dehumidification OFF) Figure 10 illustrates refrigerant flow in cooling mode (dehu- midification mode OFF), The liquid refrigerant from the outdoor unit enters the EDA module . Since there is no demand for dehumidification, the 3−way diverting valve assembly directs the flow back out ...
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Lennox 021 - page 12
Page 12 EDA 01/06 Check List n Checkpoint What to Check Action Thermost at and Sensor Wiring Confirm Sensor connected to SignatureS tat t using twisted p air wire (see wiring diagram figure 13) Thermost at Humiditrol ® Installer Settings Confirm HUMIDITROL is enabled (see figure 8) Thermost at Humiditrol ® User Settings Confirm HUMIDITROL − Deh ...
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Lennox 021 - page 13
Page 13 EDA INST ALLATION/ SERVICE INSTRUCTIONS Air Resist ance T able 2 shows air volume and tot al air resist ance for the available EDA models. T able 2 Air Resistance Air V olume T otal Air Resist ance Model No. cfm L/s in. w.g. Pa EDA−024B 400 190 0.05 12 600 285 0.10 25 800 380 0.15 37 1000 470 0.22 55 EDA−036C 600 285 0.05 12 800 380 0.0 ...
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Lennox 021 - page 14
Page 14 EDA 01/06 Figure 12 T ypical EDA/Condensing Unit Wiring Diagram INDOOR UNIT B4 FA N Blue Y ellow Black K1 1st, cut yellow wire here. Use Wirenuts *OUTDOOR RELA Y NOT REQUIRED WITH SINGLE- SPEED OUTDOOR FAN EDA Violet Orange OUTDOOR WIRING (VSM APPLICA TION ONL Y) Purple Black Black Purple VA LV E ACTUA TOR Y ellow Y ellow 2 2nd, rewire ...
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Lennox 021 - page 15
Page 15 EDA INST ALLA TION/ SERVICE INSTRUCTIONS T ypical EDA/Heat Pump Wiring Diagram Figure 13 B4 FA N Blue Y ellow Black K1 1st, cu t yellow wire here. Use Wirenuts *OUTDOOR RELA Y NOT REQUIRED WITH SINGLE- SPEED OUTDOOR FAN EDA Violet Orange Purple Black Black Purple VA LV E ACTUA TOR Y ellow Y ellow 2 2nd, rewire yellow wire as shown 7 5 1 ...
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Lennox 021 - page 16
Page 16 EDA 01/06 Up flow/horizont al NOTE − AIR HANDLER REQUIRES FIELD−F ABRICA TED TRANSITION BETWEEN BLOWER OUTLET AND EDA COIL. [If furnace] Select indoor coil MUST BE TXV ONL Y Figure 14 Humiditrol ® Enhanced Dehumidification Accessory (EDA) Decision T ree Select EDA (REFER TO EDA ENGINEERING HANDBOOK) X = PREFERRED MA TCH−UP A = ALLOWE ...
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