Pressure Switches for Air
-
(also referred to as a vacuum
switch)
Air pressure switches are associated with gas heaters which incorporate
power venting into their design.
This switch is not intended to operate on air pressure into the switch, they
are intended to activate by air being drawn out of the switch.
Simply put, by sucking air out of the air line running to the switch, the
switch closes.
Most of the
switched listed are pre-set at the factory to accommodate differences in
altitudes for specific heater models.
H2O# 9764986
Pentair #472180
250 & 300 NT STD including ASME
(3,000 to 6000 ft) set @ 0.65 2-5/8" Diameter - Green Color
Coded Label
3-1/8" across mounting holes on switch
Micro Switch mounted Internal in switch
H2O# 9764990
Pentair #472182
300 & 400 NT TSI including ASME
(0 to 2,999 ft) set @ 0.95 3-1/4" Diameter
4" across mounting holes on switch
Micro Switch mounted External on switch
H2O# 9764994
Pentair #471569
set @ 1.50 2-5/8" Diameter - Blue Color Coded
Label
3-1/8" across mounting holes on switch
Micro Switch mounted Internal in switch
H2O#
7408290
Pentair #471428 PowerMax
(3,000 to 6000 ft)
3-1/4" Diameter
Mounting holes on 1-5/8" attached bracket
Micro Switch mounted External on switch
H2O# 9892727
Jandy / Laars #R0302000
LX / LT (all altitudes)
3-3/4" Diameter
3-1/8" across mounting holes on switch
Includes mounting bracket and hose
Micro Switch mounted External on switch
3-1/2" across mounting holes on bracket
H2O# 9833321
Raypak #002542f
GBI 33 (all altitudes)
5" Diameter
3-7/8" across mounting holes on switch
Includes short hose and vent tube nozzle
Micro Switch mounted External on switch
Used on discontinued side mount spa heater
