Installation
900285-01 08/2016
Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces
22
9.
Install the Vent Restrictor (if necessary)
1.
Use the vent run descriptions in
Figure 12
to determine if a vent restrictor is necessary.
2.
If necessary, assemble the vent restrictor and wing as detailed in
Figures 12
and
15
.
3.
If necessary, install the appropriate vent restrictor
(
Figures 13
and
14
).
NOTE:
If installing the vent restrictor in a rear vent application, ensure the factory-installed intake air baffl e is in place
(
Figure 14
)
.
NOTE:
The vent restrictor is shipped in the fi rebox.
Figure 12 - When to use a vent restrictor
Figure 13 - Vent restrictor installation, Top vent
2 1/2”
Break-Away
1
3
20
40
6
10
40
25 ft Maximum
horizontal run (flat to near level)
60 ft Maximum vertical run
60
1.9
25
Horizontal Distance (ft)
Vertical Height (ft) from top of unit
Vertical Height (ft)
2
5
Elbow**
5
10
15
3” Base + wing
3” Base
6 ft Minimum
vertical run
6 ft Minimum vertical run
None
*
*
***
* For straight runs or runs with elbows as illustrated in Vertical Vent Figures/Tables
starting on
Page 28
** No rise required.
*** On 33” Models, use the 3” base restrictor. Do not raise the break-away tab.
NOTE: When venting Rear Horizontal with slip collar and termination only, install base
vent restrictor with the breakaway portion raised.
Figure 14 - Vent restrictor installation, Rear vent
Figure 15 - Vent restrictor assembly
Inner Fireplace Collar
Appliance Rear
Vent Outlet
U-Shaped Vent
Restrictor
Intake Air Baffl e
With
break-away
raised***
Base Vent Rest Wing
Inner
Fireplace
Collar
U-Shaped Vent
Restrictor
Appliance Top Vent Outlet
Base Vent Restrictor