Venting Overview - Lochinvar POWER-FIN PF0501 Designer's Manual

Lochinvar
CAUTION!
Vent connectors
BTU/HR
serving appliances
INPUT
500,000
vented by natural
500,000
750,000
draft must not be
750,000
connected into any
1,000,000
1,000,000
portion of mechanical
1,300,000
1,300,000
draft systems
1,500,000
operating under a
1,700,000
2,000,000
positive pressure.
NOTE: Category II venting configurations must be installed with corrosion resistant vent material.

VENTING OVERVIEW

CATEGORY I DOUBLE-WALL B-VENT
(ON/OFF - ONLY)
Conventional Vertical Negative Draft
Venting with a vertical rooftop termination
and combustion air supplied from the
equipment room.
Vertical DirectAire Venting uses a vertical
negative draft flue with a rooftop termination
for flue products and a combustion air pipe
from the sidewall or rooftop.
CATEGORY IV VENT MATERIAL
(ALL MODELS)
Vertical Negative Draft Venting with a vertical
rooftop termination and combustion air
supplied from the equipment room. (Note:
B-Vent may be used with ON/OFF models)
Vertical Positive Pressure Venting with a
vertical rooftop termination and combustion
air supplied from the equipment room.
8
L o c h i n v a r
(TABLE B) POWER-FIN VENTING CONFIGURATIONS
FIRING VERTICAL VERTICAL
CODE FIRING NEGATIVE POSITIVE w/ ROOFTOP w/ SIDEWALL
PREFIX CONTROLS DRAFT PRESSURE
F ON/OFF CAT. I
M MODULATING CAT. II
F ON/OFF CAT. I
M MODULATING CAT. II
F ON/OFF CAT. I
M MODULATING CAT. II
F ON/OFF CAT. I
M MODULATING CAT. II
M MODULATING --- CAT. IV
M MODULATING --- CAT. IV
M MODULATING --- CAT. IV
'
D E S I G N E R S G U I D E P O W E R
VERTICAL VERTICAL
DirectAire DirectAire
HORIZONTAL
AIR INLET AIR INLET DirectAire
--- CAT. I CAT. I CAT. IV
--- --- CAT. II CAT. IV
--- CAT. I CAT. I CAT. IV
--- --- CAT. II CAT. IV
--- CAT. I CAT. I CAT. IV
--- --- CAT. II CAT. IV
--- CAT. I CAT. I CAT. IV
--- --- CAT. II CAT. IV
--- CAT. IV CAT. IV
--- CAT. IV CAT. IV
--- CAT. IV CAT. IV
Sidewall Venting uses the unit's internal fan to
exhaust the flue products out to a sidewall
vent termination with combustion air supplied
from the equipment room.
Vertical DirectAire Venting (Sidewall Inlet) with
a vertical rooftop termination for flue products
and a combustion air pipe from the sidewall.
(Note: B-Vent may be used with ON/OFF
models)
Horizontal DirectAire Venting uses the unit's
internal fan to exhaust the flue products out a
sidewall vent termination with a combustion
air pipe from the rooftop or from a sidewall
other than where the flue terminates.
Horizontal or Vertical Direct Venting uses the
unit's internal fan to exhaust the flue products
out to a sidewall or rooftop vent termination
with a separate sealed combustion air pipe to
the outdoors. This system terminates both the
flue and combustion air inlet on the same
surface and in the same pressure zone.
-
F I N W A T E R H E A T E R
VERTICAL HORIZONTAL
SIDEWALL DIRECT VENT DIRECT VENT
CAT. IV CAT. IV CAT. IV
CAT. IV CAT. IV CAT. IV
CAT. IV CAT. IV CAT. IV
CAT. IV CAT. IV CAT. IV
CAT. IV CAT. IV CAT. IV
CAT. IV CAT. IV CAT. IV
CAT. IV CAT. IV CAT. IV
CAT. IV CAT. IV CAT. IV
CAT. IV CAT. IV CAT. IV
CAT. IV CAT. IV CAT. IV
CAT. IV CAT. IV CAT. IV
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