Napoleon/Timberwolf Vacuum Switch- Metal- Replaces W660-0056 #GRA4XB70#

Replacement Metal Vacuum/Hopper Pressure Switch for Napoleon/Timberwolf pellet and multi-fuel stoves. Non OEM. OEM switch is plastic. This switch is longer lasting metal. Replaces part # W660-0056. Negative pressure hookup. Note: The mounting may differ for the switch that comes with your stove. You may have to drill new holes to mount this vacuum switch. Fits ALL Napoleon/Timberwolf pellet stoves including:

Napoleon Pellet Stoves:

NPS40
NPI40
NPS45
NPI45

Timberwolf Pellet Stoves:

TPS35
TPI35

Pressure adjustment range from 0.12 to 5.0 WC should be set to approx .15 for most pellet stoves.

The vacuum switch is a safety switch that shuts the pellet stove down if the combustion (Exhaust) blower fails. If your pellet stove starts up then stops feeding pellets after the start cycle is over, then the vacuum switch is bad or the vacuum line is clogged with ash. Also, if the auger motor does not turn you may have a bad vacuum switch.

Check the mounting of your old switch. This is direct fit for Pelpro and Breckwell pellet stoves. It will work on all other models with mounting adjustments.

Most newer stoves use the open terminal and common terminal for the electrical connectors and negative vacuum port. This means the exhaust fan is after the burn pot and connects to the venting and the switch is open until the negative pressure is applied.

Negative Pressure Hookup

Clip wires to farthest terminals from knob. Connect hose to low port. For the following pellet stoves.