Trane UHMB060ACV3VB - Page 38

38 18-CD30D1-12
Installer’s Guide
Heat Exchanger (Cold Header)
Burner Box
H-Fitting
Pressure
Switch
PS-1
Tee
Tee
Tee
Pressure Switch
PS-3
Pressure
Switch
PS-2
Negative
Control
Pressure
Post
Positive Control
Pressure Post
Modulating
Gas Valve
Orifice in H fitting must
be pointing away from PS1
VACUUM HOSE
ROUTING
R
To Pressure
Switch PS-1
! Important !
Brass orifices located in these two legs.
H-Fitting must be installed in this orientation.
E