Lochinvar Power-Fin Designer's Manual page 18

Designer's Guide / Power-fin Water Heater
Category I Venting
Of the six layouts listed on page 8, three can be installed as Category I venting. The following
offers a diagram of the three layouts, important design information and a list of the available vent
kits that are required to install in these configurations. Notice that only vertical termination is
permissible with Category I venting.
Vertical Vent with Air from the Equipment Room
Vertical Vent with Air from the Rooftop
Vertical Vent with Air from the Sidewall
CATEGORY I VENTING – "F9" OR "B9"FIRING CODE
VERTICAL VENT WITH COMBUSTION AIR FROM EQUIPMENT ROOM.
The flue outlet terminates on the rooftop. The combustion air is drawn
naturally from the equipment room.
BULLET POINTS
Category I double wall "B" vent is required.
All vent material for this configuration including vent termination will be obtained locally.
The air is delivered to the equipment room by means defined in Chapter 1.
A field supplied barometric damper is optional on Power-fin 0502-1302-F9.
A field supplied barometric damper MUST be installed on Power-fin 1501-2001-B9.
The Category I Power-fin with a model number that features the F9 or B9 Firing Code will be
factory trimmed for Category I vent connection in the following dimensions.
MODEL
PFN0502PM-F9
PFN0752PM-F9
PFN1002PM-F9
PFN1302PM-F9
PFN1501PM-B9
PFN1701PM-B9
PFN2001PM-B9
Category I
Category I
Category I
CAT I VENT CONNNECTION
7"
9"
10"
12"
12"
14"
14"
18
LOCHINVAR CORPORATION
300 MADDOX SIMPSON PKWY
LEBANON, TN 37090
www.lochinvar.com