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Aprilaire 1770A manual

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Table of contents for the manual

  • Page 1

    Model 175 0A / 1 7 7 0A Dehumidifier Installation Instructions READ AND SA VE THESE INSTRUCTIONS CAUTION 1. Read all instructions before beginning installation. 2. Do not use in pool applications. Pool chemicals can damage the dehumidifier . 3. Do not use solvents or cleaners on or near the circuit board. Chemicals can damage circuit board compone[...]

  • Page 2

    OVERVIEW The Aprilaire ® Dehumidifier is designed to control humidity inside the whole home. The dehumidifier uses a dew point calculation to control the humid ity based on the drynes s set point on the dehumidi fier contr ol. An opti onal Model 70 Living Space Contro l or third- party control can be used in place of the onboar d control. The dehu[...]

  • Page 3

    SPECIFICA TIONS Dimensions: 20-3/4”W x 24”L x 20-5/8”H Adjustable feet allow for 22-5/8” total height W eight: 1750A – 93 lbs. 1770A – 100 lbs. Capacity: 1750A – 90 pints per day @ 275 CFM 1770A – 135 pints per day @ 500 CFM AHAM DH-1-2003 80°F , 60%RH conditions Power: 1750A – 115 V AC, 8 A, 15 A circuit 1770A – 115 V AC, 14 A[...]

  • Page 4

    FIGURE 2 – Dimensions and Location Considerations 20-3/4 (527) 24.00 (610) 9-1/2 (241) 10-3/8 (264) 1-1/4 (32) 6-1/2 (165) OFF ON Air Outlet 8 in. Round Collar OFF/ON Switch Drain 2-1/2 (64) 3-7/8 (98) Damper Fully Open Filter Access (Front and Back) Power Cord Air Flow 2-1/2 (64) 20-3/4 (527) 11 (279) 9 (229) 19-5/8 (498) 3 (76) Max. Wiring Acce[...]

  • Page 5

    FIGURE 3 – Install Damper in Collar 90-1503 FIGURE 4 – Install Collar with Damper on Outlet 90-1503 FIGURE 5 – Minimum Ductwork Bend Distance 90-1503 DUCT COLLARS & BACKFLOW DAMPER The backfl ow damper installs on the outlet side of the dehumidifi er , using featur es molded into the duct collar . 1. Remove the duct collars and backflow d[...]

  • Page 6

    FIGURE 6 – Drain Trap 90-961 MECHANICAL INST ALLA TION (CONTINUED) DRAIN 1. Adjust feet of dehumi difie r to allow a 2-1/2” minimum clearance for drain trap. See Figure 6 . Use the 90° elbow if necessa ry for clearance restrictions. See Figure 7 . 2. Use PVC primer and cement for drain assembly to the dehumidifi er drain outlet. 3. Complete as[...]

  • Page 7

    WHOLE-HOME INST ALLA TION (CONTINUED) FIGURE 9 – Whole-Home Basement Installation CONDENSA TE HOSE (TO COMMON DRAIN OR OUTSIDE) AIR IS PULLED FROM RETURN DUCT DEHUMIDIFIED AIR IS SUPPLIED DOWNSTREAM FROM A-COIL TO MINIMIZE EV APORA TION OFF A-COIL A-COIL RETURN DUCT SUPP LY DUCT DEHUMIDIFIER 115 VA C CIRCUIT HV AC / FURNACE FLOOR DRAIN FIGURE 10 [...]

  • Page 8

    WHOLE-HOME INST ALLA TION (CONTINUED) •  HV ACFAN ON:Activatin gtheHV AC fan  during dehumidi ficat ionis recomm ended because it offers bett er circul ation and balancing of indoor air conditions. Running the HV AC fan during dehumidification does not affect moisture removal efficiency . If the switch is put i[...]

  • Page 9

    SPOT INST ALLA TION (CONTINUED) FIGURE 14 – Spot Ducted Installation OUTSIDE AIR TO HOUSE LIVING SP ACE SUPPL Y DUCT RETURN DUCT FLOOR DRAIN DEHUMIDIFIER 115 VA C CIRCUIT EQUIPMENT ROOM CONDENS AT E HOSE (TO COMMON DRAIN OR OUTSIDE) HV AC FURNACE DEHUMIDIFIED AIR IS SUPPLIED TO DUCTED SP ACE AIR IS PULLED FROM AREA GRILLE WITH 8" DUCT COLLAR[...]

  • Page 10

    CONVERTIBLE INST ALLA TION In this installation the dehumidifier controls humidity in both the whole- home and a spot locatio n. The dehu midif ier will dehumidify the whole home as the first priority , switching to the spot location after the whole-home dehumidification need has been met. Duct ing the unit to the return and suppl y , where air is [...]

  • Page 11

    CONVERTIBLE INST ALLA TION (CONTINUED) •  HV ACFAN ON:Activatin gtheHV AC fan  during Whole-Ho medehumid ifica tion is recomme nded beca use it offers bette r circu latio n and balancin g of indoor air condit ions. Running the HV AC fan during dehumi dific ation does not affect moistu re remo val effic iency . [...]

  • Page 12

    VENTILA TION OR AIR CYCLING The dehumi difie r has outputs avai lable to open a norm ally clos ed damper and introd uce out door air thoug h an outdoo r air intake duct. V entilat ion is cont rolle d by the Cycle Period switches, Cycle T ime potentiometer , and V ent-Auto/Vent-T imed switches. If a normally closed ventilation damper is not installe[...]

  • Page 13

    VENTILA TION OR AIR CYCLING (CONTINUED) DETERMINE FRESH AIR DELIVERY RATE 1. Measure the negative static pressure of the return system at the location where the outdoor air duct enters the return duct. 2. See T able 4 for estimated inlet airflow in CFM, based on duct type, length, and available negative pressure. Use an airflow measuring device for[...]

  • Page 14

    VENTILA TION OR AIR CYCLING (CONTINUED) Switch Notes: •  Setting theCycle T ime ≥ Cycle Period will result in constant ventilation. •  Setting theCycle T imeto OFF willdisable ventilation. 1. Set VENT -AUTO and VENT -TI MED switch . VENT -AUTO restricts ventil ation based on outdoor tempe rature[...]

  • Page 15

    VENTILA TION OR AIR CYCLING (CONTINUED) SEQUENCE OF OPERATION VENT-TIMED, HVAC INITIATES VENTILATION •  V entilat ionwilloccur  whenev erthereisanHV ACfan (Gs )orheat(W)callandwillcontinue  untiltheventi lationtimehasmetthesetCycle T ime during the set Cycle Perio[...]

  • Page 16

    MODEL 70 LIVING SP ACE CONTROL WIRING & DIP SWITCH CONFIGURATION TheModel 70 LivingSpace Controlcontains itsown sensorsthat override themain controlsensors onthe dehumidifier . Thepurpose ofutilizing  the Model 70 is to have the dehumidi fier contr ol locate d in a liv ing are[...]

  • Page 17

    THIRD-P ARTY CONTROL WIRING & DIP SWITCH CONFIGURATION An externa l thermos tat with dehum idifi er connect ions can be used as an ON/ OFF dehumi difier control. In this configura tion, the third-par ty control initiates dehumidification and overrides the on-board dehumidifier control logic. The dehumidifier control knob can only be used to ini[...]

  • Page 18

    SYSTEM CHECKOUT DEHUMIDIFICATION 1. Check the wiring to the HVAC equipment and any accessories if applicable. 2. Plug unit in and turn on/off switch to ON. 3. Rotate the main control knob clockwise to the TEST position. 4. If set up cor rectl y , the dehumidi fier blow er will turn on and the dehumidi fier damp er output will turn on. After 30 seco[...]

  • Page 19

    TROUBLESHOOTING T ABLE 7 – Green LED Codes Activity Status Solid ON Compressor ON Blinking 1 sec. ON & 1 sec. OFF Sampling Blinking 1/2 sec. ON & 1/2 sec. OFF Defrosting Alternating Green & Red T est Mode T echnical Support is available Monday through Friday , 7:00 a.m. to 5:00 p.m. CST , at (800) 334-6011. Use the guides on the follo[...]

  • Page 20

    T ABLE 9 – T roubleshooting Guide Symptom Possible Reason T roubleshooting Procedure Dehumi difier does not turn on/run. No power to unit. • Check thatthe dehumidifieris pluggedin. • Check thatthe powerswitch onthe dehumidifieris ON. • Check thatcontrol knobis set[...]