310317-20 TCVT.PVCV
5056.42665-A
13
Pressure switch Connection for “Series D” Fireplaces
Attach the silicone tube from the upper pressure tap on the power vent adaptor (Figure 2) to the “low” port of
the pressure switch. Attach the other silicone tube from the lower pressure ap to the “high” port of the pres-
sure switch (Figure 20).
Selecting Natural Vent and Power Vent Modes
The NV / PV (Natural Vent / Power Vent) switch (Figure 21) on the interface board (Figure 19) is set according
to which type of evacuating vent system is present. If the fi replace is vented without the assistance of a power
vent, the switch should be set to “NV”. If using a power vent, “PV” must be selected.
Important Note:
When switching between NV and PV, both the electrical power supply to the fi replace must be turned
off and the backup batteries removed to properly re-set the module.
Low side
of switch
High side
of switch
Figure 20: Pressure switch connections.
Figure 21: Power vent selection switch.
Note:
Do not install
batteries in the
wall switch when
using a power
vent
