"Putting a Damper on Cold Air"

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Motorized Dampers

HOM - Combustion Air Damper

HOM - Combustion Air Damper

HMI HOM Series
- Fresh Air Damper for Combustion Air Control -

Quick Links

* HOM Installation Instructions - (pdf)

* HOM - Commercial Installation Instructions - (pdf)

* Colored Wiring Diagrams used with HOM Series

* HOM Troubleshooting Guide

QUESTION:

* Why can't I use a regular universal motorized damper (HAC) to control the cold air coming from my combustion air duct? - (pdf)

NEW! VIDEO - Click here to view
Shell Busey and Cliff Hoyme explain the HOM Damper in a video from our archives.

HOM Series dampers automatically control fresh air for combustion in residential and commercial buildings. Sizes range from 4" to 9" diameters in increments of 1". For larger commercial sizes, several dampers are mounted in tandem with end switches connected in series. May be used for retrofit and new installations.

Passive fresh air inlet ducts waste energy, are sometimes plugged and therefore become unsafe. Alternatively, HMI HOYME Motorized Dampers are safe as there is no need to plug the duct. The result is added comfort, added safety and a saving in energy costs.

Series HOM dampers are connected to the appliance transformer and are power closed. When the appliance fires, the damper drops open by gravity and does not interfere with appliance transformer.

CSA International Certified. Satisfaction guaranteed.

Typical Installations

Residential Installation - Commercial Installation

Features Include:

Simple to install, attaches to the terminating end of insulated air supply duct.
Interlocks with the safety control system of gas, propane and oil fired appliances which guarantees the damper to be open before the fire starts.
Certified as required by National Gas Codes; fail-safe open, power closed.
Durable, patented HMI 'spring motor drive' with nylon bearings.
Standard connection to 24Vac thermo/aqua-stat circuits plus, with the use of 'Interface Relay Adaptors' , damper is compatible with MilliVolt DC and 120 Vac safety control systems.

Options Include:

1. Additional Relay and end-proving-switch to control two appliances (SF2).

2. Interface Relay Adaptors to provide interlocking connection to Millivolt DC and Line Voltage AC controls for commercial buildings.

3. TEST/RUN switch (Standard equipment) to automatically disconnect circuits for testing damper and appliance operation.

General Damper Identification: i.e HOM-0511-SF1

Series	Diameter (in)	Motors	Relays	End Switch	Furnace	No. of switches/furnaces
HOM	05	1	1	S	F	1

HOM Installation Instructions - Printer Friendly(pdf)

Colored Wire Diagrams used with the HOM Series Dampers

SF1 - One Appliance Model

#1. Combustion air damper

#1A. Combustion air damper with heat limit switch

#3. Combustion air damper and replacement air damper - Power Close

#3A. Combustion air damper and replacement air damper, Power Open

#3A1. Combustion air damper and replacement air damper, Power Open with switch

#3A2. Combustion air damper and replacement air damper, Power Open with Hoyme Switch

#3A3. Combustion air damper and replacement air damper, Power Open with timer/switch

#5. 120VAC vent switch, combustion air, and replacement air

#5C. 120 Vac two double pole vent switches with two exhaust fans , combustion air and replacement air

#6A3. Combustion Air, Two 120Vac separate vent switchs and fans, Two Adaptor 1101's & replacement air damper, Power Close

#7. 24VAC vent switch, combustion air, and replacement air

#7A. 24Vac vent switch, combustion air, and replacement air with two exhaust fans and two individual timers

#7A1. 24Vac vent switch, combustion air, and replacement air with two exhaust fans and two individual timers Power open

#9. Timer, vent switch, combustion air, and replacement air

#11. Vent switch, combustion air, and interlocking replacement air

SF2 - Two Appliance Model

#1A. Combustion air damper with heat limit switch

#2. Combustion air damper for two furnaces

#2A. Combustion air damper for two furnaces and a replacement air damper - Power Close

#2A1. Combustion air damper for two furnaces and two seperate replacement air dampers - both Power Open

#2B. Combustion air damper for two furnaces and two seperate replacement air dampers, one Power Open one Power Close

#2B1. Combustion air damper for two furnaces and two seperate replacement air dampers - both Power Close

#5A. 120VAC vent switch, combustion air and replacement air (2 furnaces)

#5B. 120VAC vent switch, combustion air(2 furnaces), replacement air

#5B1. 120Vac vent switch, combustion air(2 furnaces), replacement air dampers with relays

#8A3. Forced air furnace with Combustion air damper which also supplies replacement air for 120 Vac Gas Dryer

#8A4. Forced Air Furnace having a combustion air supply duct and also a replacement air duct(PC) that serves as an air supply for a 120Vac gas dryer.

#8A5. Forced Air Furnace having a combustion air supply duct and also a replacement air duct(PO) that serves as an air supply for a 120Vac gas dryer.

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Last Updated (Wednesday, 20 February 2013 14:49)