Optional PVC vent system installation instructions supplement
4
O
Figure 3
PVC Vent Adaptor Installation
Carefully push the vent adaptor into the vent collar until it bott oms
against the stop bead on the adaptor and tighten the ring clamp to
secure the vent adaptor to the Fusion vent collar, Figures 1 and 2.
PVC VENT ADAPTOR WIRING
Failure to properly connect the fl ue temperature sensor
and fl ue temperature high limit switch will prevent the
Fusion from operating.
Locate the wire harness inside the economizer cabinet. Connect the
two wires with the 1/4 in. quick connects to the fl ue temperature
high limit switch. Connect the two wires with the 3/16 quick con-
nects to the fl ue temperature sensor.
PVC VENT SYSTEM INSTALLATION
Never insulate or encapsulate the PVC vent system or
overheating and failure of the vent system may occur.
Th e PVC vent system must be exposed to ambient air
and readily visible for inspection. Failure to properly
vent this product can result in CO poisoning causing
severe personal injury or death! Exception: Per
NFPA=54 Secion 12.6.8: The remaining space
surrounding a chimney liner, gas vent, special gas vent
or plastic piping installed within a masonry chimney
shall not be used to vent another appliance.
Th e PVC vent adapter has been engineered to directly accept PVC
vent pipe. Th e internal gasket in the vent adaptor will form a gas and
water tight seal. No glues or sealants are required at this connection.
Slide the required horizontal length of PVC pipe into the vent
adaptor and tighten the ring clamp to secure it in place. Th e vent
system must be sized per Table 1.
Table 1
Vent System Size
Th e maximum equivalent length for a positive pressure vent system
is
60 ft
,
18.3 m
. Each 90° elbow and the vent terminal are equal to
10
linear ft
,
3.0 linear m
of pipe.
To maximize the performance of the vent system, locate 90° elbows
as far from the Fusion and one another as possible.
When horizontal vent runs exceed
5 ft
,
1.5 m
they must be supported
at
3 ft
,
0.98 m
pitched intervals with overhead hangers. The vent system
must be down, toward the vent terminal,
1/4 in/ft ,
21 mm/m
.
If the vent system contains vertical sections horizontal vent runs
between the Fusion and the vertical section must be pitched back,
toward the economizer,
1/4 in/ft
,
21 mm/m
, to prevent condensate from
pooling in the vent.
Model Size
Pipe Diameter
In
mm
500-1500
8
203
1750-2000
10
254
2500-3000
8
203
3500-4000
10
254
