Trane UHMB060ACV3VA Installer's Manual page 38

Installer's Guide
E
! Important !
Brass orifices located in these two legs.
H-Fitting must be installed in this orientation.
VACUUM HOSE
ROUTING
Orifice in H fitting must
be pointing away from PS1
Pressure Switch
PS-3
Pressure
Switch
PS-2
Tee
Heat Exchanger (Cold Header)
38
To Pressure
Switch PS-1
Burner Box
Tee
Tee
Pressure
Switch
PS-1
H-Fitting
Negative
Control
Pressure
Post
Modulating
Gas Valve
Positive Control
Pressure Post
R
18-CD30D1-9