Aprilaire Dehumidifier 4655 User's Manual
Contents
1. Humidifier Control Safety and Installation Instructions READ COMPLETE INSTALLATION INSTRUCTIONS AND TEMPLATE BEF0RE STARTING 4 WARNING ATTENTION INSTALLER This product must be installed by a qualified heating and air conditioning contractor Failure to do so could result in serious injury from electrical shock THESE INSTALLATION INSTRUCTIONS ARE FOR THE APRILAIRE MANUAL HUMIDIFIER CONTROL ONLY For Aprilaire humidifier installation follow Aprilaire Humidifier Installation Instructions The Manual Humidifier Control Part 4655 is designed for low voltage service to control humidification equipment An increase in relative humidity RH expands the nylon ribbon which opens the control switch to stop operation of the humidifier A decrease in RH reverses the process and closes the control switch 4 WARNING 1 120 volts may cause serious injury from electrical shock Disconnect electrical power to the furnace before starting installation 2 Sharp edges may cause serious injury from cuts Use care when cutting plenum openings and handling ductwork 4 CAUTION 1 Do not set humidity higher than recommended Condensation damage may result 2 Do not set humidity up to recommended levels if there is condensation on the inside of windows of any unheated living space Condensation damage may result 3 Do not mount the Manual Humidifier Control on the supply plenum or duct The unit cannot withstand2. 5 Carefully cut the opening in the sheet metal 6 See Figure 3 Gently pull knob A from Humidifier Control cover B Cover is held in place by snap clips Remove cover by pulling carefully Do not touch the sensing element 7 Run low voltage leads to control location All wiring should conform to the National Electrical Code and local regulations 8 Attach low voltage wires 9 Make sure that the gasket G is in place Use four sheet metal screws H not provided to mount the Humidifier Control in the sheet metal opening 10 Reassemble Humidifier Control cover guiding the low voltage wires through the cover side opening Press on knob 11 Secure the sheet metal plate inside the duct Figure 3 Fiber Board Duct Mount HUMIDISTAT SWITCH COVER B KNOBA BASE PLATE D RETURN DUCT RETURN SHEET METAL DUCT PLATE GASKET G SCREW H x4 INSIDE RETURN DUCT SHEET METAL PLATE CUT OPENING IN RETURN DUCT 90 1230 SPECIFICATIONS RANGE u cane ba aba e tet 15 to 50 OPERATIONAL DIFFERENTIAL 8 RH NOMINAL DIMENSIONS Inches 5 1 8 asss sena aa 3 3 8 Susa pasa aes 1 15 16 ELECTRICAL DATA SPST Switch 2 wires 24 volts A C Maximum load contacts 5 2 amps q a Lu lt For Use On Sheet M
3. Duct sheet metal Installation 1 Select Humidifier Control location on furnace return air duct 2 Use the attached template to mark the duct opening 3 Carefully cut the opening in the duct 4 See Figure 2 Gently pull knob A from Humidifier Control cover B Cover is held in place by snap clips Remove cover by pulling carefully Do not touch the sensing element Run low voltage leads to control location All wiring should conform to the National Electrical Code and local regulations 6 Attach low voltage wires 7 Make sure that the gasket G is in place Use four sheet metal screws H not provided to mount the Humidifier Control in the duct opening 8 Reassemble Humidifier Control cover guiding the low voltage wires through the cover side opening Press on knob Figure 2 Sheet Duct Mount GASKET G BASE PLATE D A SCREW H x4 HUMIDISTAT SWITCH C COVER KNOB A INSIDE OF RETURN DUCT RETURN DUCT 90 1229 Duct fiber board Installation 1 Select Humidifier Control location on furnace return air duct 2 Cut a rectangular hole in the duct board no smaller than 5 3 4 inches long by 3 3 4 inches wide 3 Cut a rectangular piece of sheet metal to fit behind the hole in duct board for mounting the Humidifier Control 4 Use the attached template to mark the sheet metal opening for the Humidifier Control
4. supply temperatures and will malfunction 4 Do not mount the Manual Humidifier Control downstream of the bypass outlet False humidity conditions will cause the humidifier to operate incorrectly LOCATION Control can be mounted on wall in living space or on return duct For Wall Mount e Locate an inside wall of living area approximately 5 above the floor e Do not locate control in the direct path of drafts from open doors and windows e Do not install where operation might be affected by lamps sunlight fireplace registers radiators concealed air ducts and pipes or room occupants e The basic rules for location of thermostats also apply to humidifier controls For Duct Mount Locate on the furnace return air plenum or duct at least 6 upstream of the humidifier humidifier bypass ductwork if applicable or fresh air intake ductwork if applicable GENERAL INSTRUCTIONS e Do not mount the Humidifier Control on counter flow furnace Furnace malfunction will result in improper humidifier operation e Be sure the Humidifier Control is installed on a 24 VAC circuit only e Make sure no bare wires are exposed or insulation damaged e Make sure all splices are mechanically and electrically secure e To remove dirt or other foreign matter from the nylon ribbon and control interior dust lightly with a fine soft brush 3 INSTALLING AND WIRING Wall Installation Select location for the Hu
5. etal Return Plenum ONINAdO NI 1091309 HAISIGIAINH TIVLSNI SM3HOS TVI3IA 133HS t ONISA G 5NIN340 113 A131Vu 199V 31V HIN341 3AOIN3H ALW Id WAL 40 53909 3015110 39 V8 1 N0I193NN09 H3HIGIWNH 3H1 340438 30 18411 WANS ld NYALSY WLIW LIJAS 3H1 NO 31 19 81 JOV ld 2 53903 INOW 31V IdN31 LNO LNI L 9 2 9 325 31v INL 11 RESEARCH PRODUCTS CORPORATION PO BOX 1467 e MADISON WI 53701 1467 Call 800 334 6011 FAX 608 257 4357 10007235 8 07 B2204275A Printed in USA
6. midifier Control on an inside wall Mount the Humidifier Control in a location where low voltage wires from the furnace area are already in place or can be easily run 2 Drill a 1 2 hole into the wall at the selected Humidifier Control location 3 Pull low voltage wires from the furnace area and through the hole in the wall Before mounting the Humidifier Control the hole in wall should be plugged to prevent drafts affecting the Humidifier Control reading All wiring should conform to the National Electrical Code and local regulations 4 See Figure 1 Gently pull knob A from Humidifier Control cover B Cover is held in place by snap clips Remove cover by pulling carefully Do not touch the sensing element Pull low voltage leads through opening in base plate D 6 Attach wires to terminal screws on Humidifier Control Note If wires are bunched between Humidifier Control and wall base plate may become warped or cracked and calibration may be affected 7 Remove the gasket not required for wall mount Attach base plate with humidistat switch to the wall using two screws E and two wall anchors F if necessary 8 Reassemble Humidifier Control cover by snapping back in place Press on knob Figure 1 Wall Mount ANCHOR F 2 SCREW E 2 BASE PLATE D HUMIDISTAT SWITCH COVERB BASE PLATE D 90 1228
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