Installation Guides
All products & configurations
Colour Wiring Diagrams
Inspector-ready, every ADP model
Product Spec Sheets
Dimensions, ratings & certs
Troubleshooting & Service
Relay replacement & conversion
Testing & Certification
CSA & NRC documentation
Watch & Learn
Video Learning Library
Short, practical videos on damper selection, wiring, and the field questions we hear most — from the same team that answers the technical support line. New episodes post every week on our YouTube channel.
HAC — Why New Builds Need a Motorized Damper
HOM — Why New Houses Starve Their Furnaces of Air
ADP — The One Part That Fails Inspections
More videos on the Hoyme Manufacturing YouTube channel — new episodes every Friday.
Section 1
Installation Instructions
Step-by-step installation and wiring instructions for all Hoyme motorized dampers and ADP interface relay adaptors. PDF documents cover residential and commercial applications across all product families.
HAC — Inline Motorized Air Control Dampers
HAC Installation & Wiring Instructions
PDF ↓
HAC-F Motorized Flue Damper Installation Instructions
PDF ↓
HOM — Combustion Air Damper
HOM Combustion Air Damper Installation — Residential
PDF ↓
HOM Combustion Air Damper Installation — Commercial
PDF ↓
MAC — Motorized Make-Up Air / Fresh Air Damper
HAE — Furnace Fan Generated Air Exchanger
HAE Air Exchanger Installation — Residential
PDF ↓
HAE Air Exchanger Installation — Commercial
PDF ↓
HAE — How It Works (System Airflow Diagram)
PDF ↓
ADP — Interface Relay Adaptors (All Models)
Installation instructions for all Hoyme ADP relay adaptor models. ADP adaptors interlock fresh air dampers, combustion air dampers, exhaust fans, and furnaces — available in 24Vac, 110Vac, 110/24Vac, and millivolt configurations.
ADP-0241-05A Installation Instructions
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ADP-0240-1WS Installation Instructions
PDF ↓
ADP-0242-05A Installation Instructions
PDF ↓
ADP-0243-S5A Installation Instructions
PDF ↓
ADP-0244-05A Installation Instructions
PDF ↓
ADP-024T-S20VA Installation Instructions
PDF ↓
Grasslin Interval Timer Operation Instructions
PDF ↓
ADP-0MV2-S5A Installation Instructions
PDF ↓
ADP-1101-05A Installation Instructions
PDF ↓
ADP-1101-10AS Installation Instructions
PDF ↓
ADP-1101-10AV Installation Instructions
PDF ↓
ADP-1102-10A Installation Instructions
PDF ↓
ADP-1102-S5A Installation Instructions
PDF ↓
ADP-1102-TPX Installation Instructions
PDF ↓
ADP-1102-TW5 Installation Instructions
PDF ↓
ADP-1102-TWP Installation Instructions
PDF ↓
ADP-1103-TW5 Installation Instructions
PDF ↓
ADP-1103-TPX Installation Instructions
PDF ↓
RADP-0241-10A Installation Instructions
PDF ↓
RADP-0241-S10A Installation Instructions
PDF ↓
RADP-0242-S10A Installation Instructions
PDF ↓
RADP-1102-TPX Installation Instructions
PDF ↓
TMADP-1102-TPX Installation Instructions
PDF ↓
TMADP-1103-TWP Installation Instructions
PDF ↓
TRADP-1102-TPX Installation Instructions
PDF ↓
Section 2
Colour Wiring Diagrams — HVAC Damper & Relay Adaptor Configurations
Over 80 full-colour wiring diagrams covering every Hoyme damper and relay adaptor configuration. Each diagram is CSA-certified and inspector-ready. Covers HOM combustion air damper installations, HAC fresh air damper installations, ADP relay adaptor wiring, TMADP timer adaptor sequences, and multi-furnace configurations. Click any diagram number to download the PDF.
How to find your wiring diagram: Diagrams 1–3 cover combustion air (HOM) installations. Diagrams 4–12 cover fresh air and replacement air (HAC/MAC) installations with various ADP adaptor and ventilation fan combinations. If you are unsure which diagram applies to your installation, call 1-800-661-7382.
Diagrams 1–2B1 — HOM Combustion Air Damper Wiring Diagrams
#1Combustion Air Damper (HOM-0x11-SF1) interlocked to one furnace. Damper with end switch proves open before furnace fires.PDF ↓
#1ACombustion Air Damper (HOM-0x11-SF1) interlocked to a furnace and interconnected to a DHW with a heat limit switch.PDF ↓
#1BDHW with heat limit switch (HLS-1100) interconnected to a combustion air damper (HOM-0x11-SF1), no furnace.PDF ↓
#2Combustion Air Damper (HOM-0x12-SF2) interlocked to two furnaces/boilers.PDF ↓
#2ACombustion Air Damper (HOM-0x12-SF2) interlocked to two furnaces and interconnected to one power close replacement air damper (HAC-0x10-OPC) opens for both furnaces.PDF ↓
#2A1Combustion Air Damper (HOM-0x12-SF2) interlocked to two furnaces and interconnected to two (HAC-0x10-OPC) power close replacement air dampers that open for either furnace.PDF ↓
#2B1Combustion Air Damper (HOM-0x12-SF2) interlocked to two furnaces and interconnected to two separate (HAC-0x11-OPC) power close replacement air dampers c/w relays to open during furnace firing.PDF ↓
Diagrams 3–3A — Combustion Air + Fresh Air Damper Combined Wiring
Diagram 4 — Fresh Air Replacement Air Damper with Relay, Furnace Interlock
Diagrams 5–5C — 120Vac Exhaust Fan with ADP-1101-05A Relay Adaptor
#5120Vac exhaust fan with adaptor (ADP-1101-05A) causing a power close fresh air damper to open and also turn on a furnace fan without interfering with combustion air damper operation.PDF ↓
#5ATwo furnaces, combustion air damper (-SF2), two power close fresh air dampers (-PC) operating together. Includes an exhaust fan and a 120Vac adaptor (ADP-1101-05A).PDF ↓
#5BTwo furnaces, combustion air damper (-SF2), two power close fresh air dampers — one without relay and one c/w relay, each damper operating separately with one to each furnace. Exhaust fan and ADP-1101-05A.PDF ↓
#5B1Two furnaces, combustion air damper (-SF2), two power close fresh air dampers (-PC) c/w relays operating separately, also open when furnaces fire. Exhaust fan and ADP-1101-05A.PDF ↓
#5B2One furnace, no combustion air damper, two 120Vac ventilation fans, one power open replacement air damper (-PO), one ADP-1101-05A, one ADP-1101-10AS.PDF ↓
#5B3Two 120Vac ventilation fans, one power close replacement air damper (-PC), one ADP-1101-05A, one ADP-1101-10AS.PDF ↓
#5C120Vac two double pole ventilation fan switches with two exhaust fans, combustion air damper and power close replacement air damper (-PC).PDF ↓
Diagrams 6–6C3 — 120Vac Ventilation Fan Switch Configurations
#6120Vac ventilation fan switch, adaptor (ADP-1101-05A) and power close replacement air damper c/w relay (-PC) opens during furnace firing.PDF ↓
#6A120Vac ventilation fan switch, adaptor (ADP-1101-05A) and power open replacement air damper (-PO) stays closed during furnace firing.PDF ↓
#6A1Two 120Vac double pole ventilation fan switches and two exhaust fans, adaptor (ADP-1101-05A) and power open replacement air damper (-PO).PDF ↓
#6A2Three 120Vac double pole ventilation fan switches and exhaust fans, adaptor (ADP-1101-05A) and power close replacement air damper c/w relay (-PC), opens during furnace firing.PDF ↓
#6A3Combustion air damper, two separate ventilation and exhaust fans, two adaptors (ADP-1101-05A) and power close replacement air damper (-PC).PDF ↓
#6A4Two 120Vac separate ventilation fans, two adaptors (ADP-1101-05A) and (ADP-1102-TWP), one power close replacement air damper (-PC) opens during furnace firing.PDF ↓
#6A5Two 120Vac ventilation fans, two adaptors (ADP-1101-05A) and (ADP-1102-TWP), one power open replacement air damper (-PO) opens during furnace firing.PDF ↓
#6A6Ventilation switch and fan, two adaptors (ADP-1101-05A) and (ADP-0241-05A), one power open fresh air damper (-PO) opens during venting and furnace firing.PDF ↓
#6A7Two separate 120Vac ventilation fans (primary and secondary), two adaptors (ADP-1102-TWP) and (ADP-1102-10AS), one power open replacement air damper (-PO), opens during furnace firing.PDF ↓
#6A8Two 120Vac ventilation fan switches (primary and secondary), two adaptors (ADP-1102-TWP) and (ADP-1102-10AS), one power close replacement air damper (-PC), opens during furnace firing.PDF ↓
#6A9Heating and cooling system equipped with a steam humidifier using adaptor (ADP-0242-05A).PDF ↓
#6BEconomizer circuit system to ventilate a computer server room with 120Vac vent switch and fan, adaptor (ADP-1101-05A), and one power close air damper (-PC).PDF ↓
#6B1Ventilation switch and large exhaust fan, two replacement fresh air supply ducts with two power open air dampers (-PO), two adaptors (ADP-1101-05A) and (ADP-0241-05A).PDF ↓
#6B2Ventilation switch and fan, two adaptors (ADP-1101-05A) and (ADP-0241-05A), one power close fresh air damper (-PC) opens during venting and furnace firing.PDF ↓
#6B3Forced air furnace having replacement air supply damper (power close - PC).PDF ↓
#6B4Forced air furnace having replacement air supply damper (power close - PC) with relay. Opens during a call for heat and A/C.PDF ↓
#6B5Forced air furnace having replacement air damper (power close - PC) with relay. Opens during a call for heat and with designated ventilation fan. Most common configuration for ADP-1101-05A with power close damper.PDF ↓
#6CVentilation switch, one adaptor (ADP-1102-TWP), one power close replacement air damper (-PC) interconnected with exhaust fan, also opens during furnace firing.PDF ↓
#6C1Ventilation switch, one adaptor (ADP-1102-TWP), one power open replacement air damper (-PO) interconnected with exhaust fan, also opens during furnace firing.PDF ↓
#6C2Ventilation switch, two adaptors (ADP-1102-TWP) and (ADP-0241-05A), one power open replacement air damper (-PO) interconnected with exhaust fan, heating and/or cooling.PDF ↓
#6C3Ventilation switch, two adaptors (ADP-1102-TWP) and (ADP-0241-05A), one power open replacement air damper (-PO) interconnected with exhaust fan, heating and/or cooling, interconnected with A/C.PDF ↓
Diagrams 7–7B — 24Vac Ventilation Switch and Timer Adaptor Configurations
#7One 24Vac ventilation switch/timer, combustion air damper, one adaptor (ADP-0241-05A), one power close replacement air damper (-PC).PDF ↓
#7ATwo 24Vac ventilation switches/timers and two exhaust fans, combustion air damper, one adaptor (ADP-0241-05A), one power close replacement air damper (-PC).PDF ↓
#7A1Two 24Vac ventilation switches/timers and two exhaust fans, combustion air damper (HOM-0x11-SF1), one adaptor (ADP-0241-10A) and 7-pole connector, one power close replacement air damper (HAC-0x10-OPC). Also turns on inlet fan.PDF ↓
#7BOne power close replacement air damper (-PC), one adaptor (RADP-0241-10A) c/w 120Vac controlled receptacle, two 24Vac transformers, two power open air dampers (HAC-0x10-SPO) c/w end switches to control adaptor.PDF ↓
Diagrams 8–8A9 — Single Furnace, 24Vac Ventilation and ADP-0241 Wiring
#8One 24Vac ventilation switch, one adaptor (ADP-0241-05A), one power close replacement air damper (HAC-0x11-OPC) c/w relay, also opens during furnace firing.PDF ↓
#8AOne 24Vac ventilation switch, one adaptor (ADP-0241-05A), one power open replacement air damper (HAC-0x10-OPO). Does not open during furnace firing.PDF ↓
#8A1One 24Vac ventilation switch, one adaptor (ADP-0241-05A), one power open replacement air damper (-PO). Does not open during furnace firing and turns on 120Vac fan.PDF ↓
#8A2One power open replacement air damper (-PO), one adaptor (RADP-0241-10A) c/w 120Vac controlled receptacle, two 24Vac transformers, two power open air dampers (HAC-0x10-SPO) c/w end switches to control adaptor.PDF ↓
#8A3Forced air furnace with combustion air damper (HOM-0x12-SF2) which also supplies replacement air for 120Vac gas dryer using adaptor (RADP-0241-S10A).PDF ↓
#8A4Forced air furnace with combustion air damper (HOM-0x12-SF2) and power close replacement air damper (HAC-0x10-OPC) which supplies replacement air for 120Vac gas dryer using adaptor (RADP-0241-S10A).PDF ↓
#8A5Forced air furnace with combustion air damper (HOM-0x12-SF2) and power open replacement air damper (HAC-0x10-OPO) which supplies replacement air for 120Vac gas dryer using adaptor (RADP-0241-S10A).PDF ↓
#8A6Forced air furnace with MAC power close air supply damper (MAC-0x11-SPC) which supplies replacement air for 120Vac gas dryer using adaptor (RADP-0241-S10A).PDF ↓
#8A7Forced air furnace with replacement air damper (HAC-0x10-OPC) and MAC power close air supply damper (MAC-0x11-SPC) which supplies replacement air for 120Vac gas dryer using adaptor (RADP-0241-S10A).PDF ↓
#8A8Forced air furnace with power open replacement air damper (HAC-0x10-OPO) and MAC power close air supply damper (MAC-0x11-SPC) which supplies replacement air for 120Vac gas dryer using adaptor (RADP-0241-S10A).PDF ↓
#8A9Forced air furnace with power open replacement air damper (HAC-0x10-OPO) and a ventilation switch/timer that uses adaptor (ADP-0242-05A) to open replacement air damper with ventilation fan and also opens during furnace firing.PDF ↓
Diagrams 8B–8D2 — Two Furnaces, Gas Dryer, and Multi-Fan Configurations
#8BForced air furnace with power close replacement air damper (HAC-0x11-OPC) c/w relay and a ventilation switch/timer that uses adaptor (ADP-0241-05A) to ventilate and also open during furnace firing.PDF ↓
#8B1Forced air furnace with power close replacement air damper (HAC-0x11-OPC) c/w relay and a ventilation switch that uses adaptor (ADP-0241-10A) to ventilate and also open during furnace firing.PDF ↓
#8B4Forced air furnace with combustion air damper (HOM-0x12-SF2) and a power open replacement air damper (HAC-0x10-OPO) that uses adaptor (RADP-1102-S10A) to supply replacement air for 120Vac gas dryer.PDF ↓
#8B5Forced air furnace with power close replacement air damper (MAC-0x11-SPC) and a power close replacement air damper (HAC-0x10-OPC) that uses adaptor (RADP-0242-S10A) to supply replacement air for 120Vac gas dryer.PDF ↓
#8B6Forced air furnace with power close replacement air damper (MAC-0x11-SPC) and a power open replacement air damper (HAC-0x10-OPO) that uses adaptor (RADP-0242-S10A) to supply replacement air for 120Vac gas dryer.PDF ↓
#8B7Forced air furnace with power close replacement air damper (HAC-0x10-OPC) and a ventilation switch/timer that uses adaptor (ADP-0242-05A) to open replacement air damper with ventilation fan and also opens during furnace firing.PDF ↓
#8B8Forced air furnace with power close replacement air damper (HAC-0x10-OPC) and two exhaust/ventilation fans that use two adaptors (ADP-1101-05A) and (ADP-0242-05A) to open damper with fans and also opens during furnace firing.PDF ↓
#8B9Forced air furnace with power close replacement air damper (HAC-0x10-OPC) and two exhaust/ventilation fans that use one adaptor (ADP-1103-TW5) to open replacement air damper with fans and also opens during furnace firing.PDF ↓
#8CTwo forced air furnaces sharing a replacement air duct with a power close fresh air damper (HAC-0x11-OPC) c/w relay controlled by adaptor (ADP-0241-05A).PDF ↓
#8C5Two forced air furnaces sharing a replacement air duct with a power open fresh air damper (HAC-0x10-OPO) with one adaptor (ADP-1102-TWP) for one furnace and a second adaptor (ADP-0241-05A) for the second furnace.PDF ↓
#8C6Two forced air furnaces sharing a replacement air duct with a power close fresh air damper (HAC-0x10-OPC) with one adaptor (ADP-1102-TWP) for one furnace and a second adaptor (ADP-0241-05A) for the second furnace.PDF ↓
#8C7Forced air furnace having a replacement air supply duct together with an exhaust fan venting three bathrooms equipped with 24Vac power open control dampers.PDF ↓
#8DTwo forced air furnaces sharing a replacement air duct with a power close fresh air damper (HAC-0x11-OPC) c/w relay with two adaptors (ADP-0241-05A) controlling the replacement air damper for either furnace.PDF ↓
#8D2Forced air furnace with combustion air damper (HOM-0x11-SF1) and a power close replacement air damper (HAC-0x10-OPC) that uses adaptor (ADP-0241-05A) to open both dampers during heating and cooling cycles.PDF ↓
Diagrams 9–9C1 — TMADP Timer Adaptor Ventilation Configurations
#9Forced air furnace with combustion air damper (HOM-0x11-SF1) and a power close replacement air damper (HAC-0x10-OPC) controlled by adaptor (TMADP-1102-TPX). Damper also opens during furnace firing.PDF ↓
#9AForced air furnace having a power close replacement air damper (HAC-0x10-OPC) and timer adaptor (TMADP-1102-TPX). Damper does not open during furnace firing.PDF ↓
#9A1Forced air furnace having a power open replacement air damper (HAC-0x10-OPO) and timer adaptor (TMADP-1102-TPX). Damper does not open during furnace firing.PDF ↓
#9A2Furnace circulation fan and replacement air damper (HAC-0x10-OPO) controlled by timer adaptor (TMADP-1102-TPX). Includes ADP-1101-05A for additional ventilation fans.PDF ↓
#9A3Forced air furnace with power open replacement air damper (HAC-0x10-OPO). Separate ventilation switch controls exhaust fan plugged into adaptor (TRADP-1102-TPX). Damper does not open during furnace firing.PDF ↓
#9A4Forced air furnace with power open replacement air damper (HAC-0x10-OPO) and two or more exhaust fans controlled by adaptors (TMADP-1102-TPX) and (ADP-1102-TWP). Also opens during furnace firing.PDF ↓
#9A5Same as #9A4 but uses a power close fresh air damper (HAC-0x10-OPC).PDF ↓
#9A6Same as #9A3 but uses a power close fresh air damper (HAC-0x10-OPC).PDF ↓
#9BForced air furnace having a power close replacement air damper (HAC-0x10-OPC) controlled by timer adaptor (TMADP-1102-TPX) and a 3-way ventilation switch.PDF ↓
#9B1Forced air furnace having a power open replacement air damper (HAC-0x10-OPO) controlled by timer adaptor (TMADP-1102-TPX) and a 3-way switch.PDF ↓
#9CSame as #9B but has a designated ventilation switch which functions fully and also an additional 3-way switch to control ventilation fan only.PDF ↓
#9C1Same as #9B1 but has a designated ventilation switch which functions fully and also an additional 3-way switch to control ventilation fan only.PDF ↓
Diagrams 10–12D1 — End Switch Proving and High-Volume Exhaust Fan Configurations
#10Forced air furnace with power close replacement air damper (HAC-0x11-OPC) c/w relay and a designated ventilation switch for exhaust fan that uses adaptor (TMADP-1102-TPX). Also opens during furnace firing.PDF ↓
#11Forced air furnace with combustion air damper (HOM-0x11-SF1) and a power close replacement air damper (HAC-0x11-SPC) c/w end switch that uses adaptor (ADP-1102-TPX). Both dampers open during furnace firing.PDF ↓
#11BDomestic hot water tank with combustion air damper (HOM-0x11-SF1) c/w end switch that uses adaptor (ADP-1102-S5A) to prove combustion air damper is open before power vent runs.PDF ↓
#12Forced air furnace with power close replacement air damper (HAC-0x11-SPC) c/w relay and end switch connected to adaptor (ADP-1102-TPX) to prove damper opens before ventilation fan and furnace fan are allowed to run.PDF ↓
#12ASimilar to #12 but uses adaptor (RADP-1102-TPX) for a plug-in ventilation fan.PDF ↓
#12BForced air furnace with power open replacement air damper (HAC-0x11-SPO) c/w relay and end switch connected to adaptor (ADP-1102-TPX) to prove damper opens before ventilation fan and furnace fan are allowed to run.PDF ↓
#12B1Forced air furnace with power open replacement air damper (HAC-0x11-SPO) c/w relay and end switch connected to adaptor (ADP-1103-TPX). Damper opens during furnace firing.PDF ↓
#12B2Same as #12B1 but uses a power close replacement air damper (HAC-0x10-SPC) that also opens during furnace firing.PDF ↓
#12B3Two exhaust fans operating separately and each connected to an adaptor (ADP-1102-TPX) interlocked to a furnace fresh air damper (HAC-0x11-SPO) that proves to be open before exhaust fans are allowed to run.PDF ↓
#12B4Two exhaust fans operating separately — one connected to adaptor (ADP-1102-TPX) and the other to adaptor (ADP-1103-TPX) — both interlocked to a furnace fresh air damper (HAC-0x10-SPO).PDF ↓
#12CHigh volume kitchen exhaust fan and inlet supply fan interconnected to a forced air heating system with an interlocking inlet power open replacement air damper (HAC-0x10-SPO) c/w end switch and adaptor (ADP-1102-TPX).PDF ↓
#12DFurnace circulation fan and replacement air damper (HAC-0x10-OPO) controlled by exhaust fan switch and adaptor (ADP-1101-05A). Additional power open damper with end switch (HAC-0x10-SPO) and HIGH VOLUME kitchen exhaust fan controlled by adaptor (ADP-1102-TPX).PDF ↓
#12D1Same as #12D but by replacing adaptor (ADP-1101-05A) with adaptor (ADP-1102-TWP), the furnace replacement air damper will now open during furnace firing.PDF ↓
Section 3
Product Information Sheets & Specification Documents
General information sheets, product comparison guides, specification references, and part number identification guides for all Hoyme dampers and accessories.
Section 4
Testing & Certification Documentation
Independent test reports and CSA certification documentation for Hoyme Manufacturing products. Includes NRC Canada energy performance testing for the HAE furnace fan air exchanger.
Section 5
Troubleshooting & Service Guides
Troubleshooting procedures for HOM combustion air dampers and HAC-F flue dampers, relay replacement kit instructions for SF1 and SF2 kits, and field conversion guides for changing power close to power open operation.
Damper Troubleshooting Procedures
HOM Combustion Air Damper Troubleshooting Guide
PDF ↓
HAC-F Motorized Flue Damper Troubleshooting Procedure
PDF ↓
Relay Replacement Kit Instructions
SF1 Relay Replacement Kit Instructions (3121-1332-SF1)
PDF ↓
SF2 Relay Replacement Kit — Switch Type (3121-1332-S24)
PDF ↓
SF2 Relay Replacement Kit — Fuse Type (3121-1332-F24)
PDF ↓
Field Conversion Procedures
Can't find the document you need?
Contact Hoyme Manufacturing technical support or your local wholesaler. We can help you identify the correct wiring diagram or installation guide for your specific HVAC configuration — free of charge.