Instruction/ maintenance manual of the product 1750A Aprilaire
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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.
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.
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.
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.
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 .
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 .
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.
WHOLE-HOME INST ALLA TION (CONTINUED) • HV ACFAN ON:Activatin gtheHV AC fan during dehumidi ficat ionis 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 .
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.
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.
CONVERTIBLE INST ALLA TION (CONTINUED) • HV ACFAN ON:Activatin gtheHV AC fan during Whole-Ho medehumid ifica tion is recomme nded beca use it offers bette r circu latio n and balancin g of indoor air condit ions.
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.
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.
VENTILA TION OR AIR CYCLING (CONTINUED) Switch Notes: • Setting theCycle T ime ≥ Cycle Period will result in constant ventilation. • Setting theCycle T imeto OFF willdisable ventilation. 1. Set VENT -AUTO and VENT -TI MED switch .
VENTILA TION OR AIR CYCLING (CONTINUED) SEQUENCE OF OPERATION VENT-TIMED, HVAC INITIATES VENTILATION • V entilat ionwilloccur whenev erthereisanHV ACfan (Gs )or.
MODEL 70 LIVING SP ACE CONTROL WIRING & DIP SWITCH CONFIGURATION TheModel 70 LivingSpace Controlcontains itsown sensorsthat override themain controlsensors onthe dehumidifier .
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.
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.
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.
T ABLE 9 – T roubleshooting Guide Symptom Possible Reason T roubleshooting Procedure Dehumi difier does not turn on/run. No power to unit. • Check thatthe dehumidifieris pluggedin. • Check thatthe powerswitch onthe dehumidifieris ON.
An important point after buying a device Aprilaire 1750A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Aprilaire 1750A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Aprilaire 1750A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Aprilaire 1750A you will learn all the available features of the product, as well as information on its operation. The information that you get Aprilaire 1750A will certainly help you make a decision on the purchase.
If you already are a holder of Aprilaire 1750A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Aprilaire 1750A.
However, one of the most important roles played by the user manual is to help in solving problems with Aprilaire 1750A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Aprilaire 1750A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
