7
SEAL THE COVER
• Install the rubber filler into the 4" opening in the bottom
of the cover as shown
8
INSTALL THE AIR INLET
• Using the screws provided, install the CAP System air
inlet onto the back plate
9
Slide the connecting flange onto the air inlet until
secure.
10
Route the wire leads from the air inlet kit to the low
voltage blocked vent (BV) contacts on the Pro-X 70200
primary control
11
SETTING BLOCKED VENT + AIR INTAKE FEATURE
The Pro-X 70200 Primary Control (manufactured
Sept. 2018 or later) is equipped with a Blocked Vent –
Air Intake feature. To activate this setting:
• Press and simultaneously for 2 seconds. This
brings you to the settings menu.
• Scroll through the different settings using until you
reach
Vent Input.
• Scroll down to
Intake using the .
• Press
/ ENTER button. The display will briefly indi-
cate
Vent Input has been “Entered” and has replaced
any previous setting.
NOTE: If the Pro-X 70200 is also connected to a
blocked exhaust switch, call Carlin Technical Support
for assistance.
12
Install 3" PVC vent pipe to provide outside air to the
CAP System.
IMPORTANT: For proper operation of the CAP System,
air inlet piping should only use schedule 40 or 80 PVC
pipe (maximum of 80' total with each elbow equal to 10').
Combustion air outdoor termination, use PVC elbow
(downward facing) and bird screen provided. Maintain
12" clearance above highest anticipated snow level.
Avoid locations where snow may drift and block com-
bustion air. Ice or snow may cause boiler to shut down
if combustion air becomes obstructed. Combustion air
termination must be min. 12" from or below doors, win-
dows or gravity inlet. USE SWEEP ELBOWS FOR ALL
COMBUSTION AIR PIPING. DO NOT USE short radius
elbows for combustion air piping – boiler performance
could be affected.
13
Mount the cover by aligning the two holes on the top
flange of the cover with the mounting tabs on the back
plate. Tighten the mounting screw, located in the center
of the cover, securely to prevent basement air from
entering the cover.
14
CHECK BURNER SETUP
Use the table below to set the combustion settings
based on outside temperatures at the time of setup.
CAP System utilizes outside air for combustion.
Incoming air temperature will fluctuate by season
which can significantly impact combustion.
Use below chart to ensure proper setup.
Incoming combustion
air temperature
during setup
CO
2
min CO
2
max
O
2
max
O
2
min
–20°F to 0°F
10.2%
11.0%
7.0%
5.8%
5°F to 30°F
11.0%
11.5%
5.8%
5.5%
35°F to 60°F
11.5%
12.2%
5.5%
4.2%
65°F or higher
12.0%
12.5%
4.6%
3.9%
HORIZONTAL or VERTICAL
3