Discription :
Aprilaire #4040 replacement solenoid valve. • 24 VAC • 2.3 Watts Replacement solenoid value for Aprilaire Humidifier models 220, 224, 400, 440, 500, 550, 558, 560, 568, 600, 700, 760, 768. The #4040 soleniod valve includes a new inline strainer (pre-inserted in inlet side of valve), and a compression nut & washer for the inlet side only.********* Solenoid Valve Replacement Instructions 1. For power units unplug electrical cord. For bypass units turn off power to furnace. Also turn the humidistat off. 2. Shut off water supply at the saddle valve 3. Disconnect inlet and outlet water compression nuts. Double wrench. Note, some water may drip on floor. Remove the orifice (which controls the water flow) from the plastic or copper tube and make sure there is no obstruction. If blocked clean or replace. 4. Remove the wire nuts from the water solenoid valve wire connections. Set aside. 5. Remove screws that secure valve to unit. 6. Attach new valve with screws. Do not over-torque screws into plastic housing. 7. Reconnect wires with wire nuts. 8. For units with plastic feed tubes inspect for brittleness, hairline cracks, nicks or abrasions, etc. Replace if necessary. 9. Reconnect the water lines, double wrenching the compression nuts. 10. Turn water back on and check system for leaks. Tighten compression nuts as necessary. 11. Restore electrical service and activate furnace by turning up the thermostat. 12. Turn up humidistat to verify operation of humidifier. Recheck for leaks. Turn down humidistat to make sure valve shuts off. Reset humidistat and thermostat to original levels. also fits in Replacement solenoid for many brands/models of whole house humidifiers. Same as Aprilaire 4040. Bryant: HUMBBSBP2412-A27 HUMBBLBP2417-A24 HUMBBLFP1418-A24 HUMBBWBP2417-A24 Carrier: HUMCCSBP2412-A27 HUMCCLBP2417-A24 HUMCCLFP1418-A24 HUMCCWBP2417-A24 Totaline: P110-SBP2412 P110-LBP2417 P110-LFP1418 ICP: HMICSB12B HMICLB17B HMICLF18B Lennox: HCWB3-12 HCWB3-17 HCWP3-18 HCWB3-12A HCWB3-17A HCWP3-18A Trane: THUMD200ABM00BA THUMD300ABA00BA THUMD500APA00BA American Standard: AHUMD200ABM00BA AHUMD300ABA00BA AHUMD500APA00BA Nordyne: 9178970 9178630 9178640 Maytag: 9181270 9181280 9181290 York: S1-BP5000MY S1-BP6000MY S1-FP7000MY Coleman: S1-BP5000MC S1-BP6000MC S1-FP7000MC Luxaire: S1-BP5000ML S1-BP5000ML S1-BP6000ML S1-FP7000ML

Normal delivery time 5 business days

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