Modine Manufacturing POR oil-fired unit Installation Instructions Manual page 8

INSTALLATION –
HORIZONTAL
DIAGONAL
FIGURE 6
SK9555
Step 3. Intake Air Hood Location (Horizontal Ducting)
Mount Intake Air Hood 12 inches above finish grade. If
mounting on the side of a building prone to drifting snow,
mount 12 inches above the snow line.
NOTE: For vertical or through-the-roof air ducting, use Field
Star-Kap™ terminal model SK-4.
Step 4. Installation of Intake Air Hood
A. Cut a 4-1/4" diameter hole through the side wall of the
building.
B. Slide the Inlet Air Hood through the hole and fasten to
wall with appropriate fasteners. Seal the edges of the
mounting plate with silicone sealant or equivalent.
C. Always mount with the Intake Air Hood opening pointing
down.
Step 5. Installation of Air Supply Duct
A. Duct length calculation: Do not exceed a MAXIMUM of
34 total equivalent feet (20' straight pipe + two 90°
elbows at an equivalent straight pipe length of 7' per
elbow). Multiply the number of elbows by 7 and subtract
it from the total run length. Maximum linear footage will
be less for flex duct. Consult flex duct manufacturer for
equivalent lengths.
B. Route the duct work from the VRV tee to the Intake Air
Hood using a minimum amount of elbows.
C. Secure and support the duct work for the design and
weight of the material used to prevent physical damage
and separation of joints.
NOTE: For guidelines, refer to recognized national
building codes or any applicable local codes.
D. To reduce uncontrolled air leakage into the duct, tape all
joints and seams using standard foil or duct tape.
E. For cold climate conditions. To prevent sweating on the
outside of the duct when operating in areas that have
temperatures -10°F or below, insulate the duct work at
least 10 feet from Intake Air Hood.
Step 6. Exhaust Termination Installation
For barometric damper and other exhaust system
requirements, refer to the latest revision of Installation &
Service Manual 4-522 (revision .4 or later).
CAS-2B Field Control AIRBOOT™ Outside Combustion Air Kit
LEVEL ACROSS
PIVOT POINTS
VERTICAL
Step 7. Burner Start-Up and Adjustment
Caution: DO NOT start the burner when excess oil has
accumulated in the chamber, when the furnace or boiler is
full of oil vapor, or when the combustion chamber is very hot.
A. After the installation is complete, set the initial
AIRBOOT™ air dial setting at 250° for POR100 and 145
or 260° for POR185, as summarized in Chart 1.
Chart 1 – Approximate Air Dial Settings (See Notes)
Model Size
Head
Static Plate
G.P.H.
Approx. AIRBOOT™
Air Dial Setting
Notes:
1. Chart based on 20 linear ft. of 4" duct, two 90° elbows,
and an Air Intake Hood.
2. G.P.H. is the firing rate for that specific model size.
3. Air Dial Settings are INITIAL settings. Always use
combustion test instruments for final adjustment settings.
B. Perform the initial startup and adjustment procedure for
model POR oil fired unit heater per the unit heater
Installation & Service Manual. When the burner air
supply and draft are properly adjusted, the over-fire
(combustion chamber) draft will be -.02" W.C.
C. Allow at least ten minutes for warm-up, or longer if the
appliance is new, in order to burn-off the oil deposits on
the heat exchanger and other surfaces.
D. Perform a smoke test. Reduce or increase the
AIRBOOT™ air dial until a TRACE OF SMOKE is
obtained. This is a reference point only, DO NOT leave
the air dial setting here.
E. Measure the CO
level. Open the air dial and add reserve air until the
CO is lowered to 11.5% to 12.5%.
2
F. Perform a smoke test again. The smoke paper should
now be clean (zero smoke).
G. After all final adjustments are made, tighten the lock
screw on the AIRBOOT™ air dial.
H. Start and stop the unit several times to ensure there are
no significant rumbles or pulsations.
I. Recheck the draft, smoke, and flue gas levels to verify
nothing has changed.
Inspection Required During Servicing/Annual
Maintenance
1. Check the Inlet Air Hood and air supply system for
accumulation of any foreign material. Give special
attention to the 1/4" mesh screen inside the Intake Air
Hood. Thoroughly clean all material from the system.
2. Note any damage to components and re-place with
exact system components.
3. Verify that the VRV is operating properly.
4. Using combustion test instruments, verify that the
operating smoke level is "zero smoke" following
procedure outlined in Step 7 section.
5. Securely tighten the lock screw on the AIRBOOT™ air
dial after final testing or servicing.
4-530
Setup Data
100 145
F4 F4
3-3/8R 3-3/8R
0.85 1.25
250° 250°
in the flue gas at the TRACE of smoke
2
185
F12
2-3/4U
1.65
260°
3