Harman Pellet Service Training
45
Draft Differential Switch
Diaphragm switch which is used to monitor the
negative draft pressure in the firebox. The older blue
switch can be used as a normally open (NO) or
normally closed (NC) switch. In the Harman Pellet
stoves, it is used as normally open. Notice the wire
terminals are labeled NO, and NC The hose ports
correspond to the wiring positions. When built, the
hose port for NC is broken off and the wire terminal
For NC is bent. This is to help prevent improper hook-
up. The feed motor and igniter are wired through this
switch and will not receive power if there is no draft,
or if the draft is too low. The switch actuates at -.17”
W.C. Even though the indicator light may be on
showing power to the feed motor, the switch could still
be intercepting the flow of current. The newer black
switches can only be used as normally open.
Содержание PF-100 Furnace
Страница 14: ...Pellet Stove Service Training Installation Guidelines Harman Pellet Service Training 14 ...
Страница 23: ...Harman Pellet Stoves Lighting and Operation Harman Pellet Service Training 23 ...
Страница 30: ...Wiring Diagram applies to all automatic stoves Harman Pellet Service Training 30 ...
Страница 31: ...Incoming Power Circuit Harman Pellet Service Training 31 ...
Страница 32: ...Combustion Blower Circuit Harman Pellet Service Training 32 ...
Страница 33: ...Distribution Blower Circuit Harman Pellet Service Training 33 ...
Страница 34: ...Feed Motor Circuit Harman Pellet Service Training 34 ...
Страница 35: ...Igniter Circuit Harman Pellet Service Training 35 ...
Страница 36: ...PF 100 Wiring Diagram Harman Pellet Service Training 36 ...
Страница 37: ...PF 100 Incoming Power Circuit Harman Pellet Service Training 37 ...
Страница 38: ...PF 100 Thermostat Control Circuit Harman Pellet Service Training 38 ...
Страница 39: ...PF 100 Combustion Blower Circuit Harman Pellet Service Training 39 ...
Страница 40: ...PF 100 Distribution Blower Circuit Harman Pellet Service Training 40 ...
Страница 41: ...PF 100 Feed Motor Circuit Harman Pellet Service Training 41 ...
Страница 42: ...PF 100 Igniter Circuit Harman Pellet Service Training 42 ...
Страница 48: ...Harman Pellet Stoves Cleaning and Maintenance Harman Pellet Service Training 48 ...
Страница 50: ...Harman Pellet Stoves Technical Specifications Harman Pellet Service Training 50 ...
Страница 56: ...The Harman Digital Diagnostic Meter Harman Pellet Service Training 56 ...
Страница 58: ...Harman Pellet Service Training 58 PC 45 Burn Pots ...
Страница 59: ...Harman Pellet Service Training 59 ...