Harman® • P35i-C Installation Manual_R2 • 2019 -___ • 02/20
25
8390-784i
After the installation is completed, but before the first fire is lit, check and record the high and low
draft readings.
Press the icon a second time, the combustion fan will go
to “Maximum” (as set in the
Authorized Dealer Only
area
under the combustion fan icon)
The “Maximum” is factory set at 2900 RPM. Allow the RPM
to stabilize and record the firebox draft Maximum.
Before Install: __________ IWC
After Install: __________ IWC
(Firebox Draft and Combustion Fan RPM Cont.)
Press the icon a third time, the combustion fan will go to
“Minimum” (as set in the
Authorized Dealer Only
area
under the combustion fan icon) allow the RPM to stabilize
and record the firebox draft minimum.
Before Install: __________ IWC
After Install: __________ IWC
Cold Stove Draft:
2500 RPM
Low -.20 and -.25
2900 RPM
High -.45 and -.50
Leaving the test screen will end any tests in progress and
goes back to whatever mode of operation it was set to on
the home screen.
If the unit is not adjusted properly, it does not cause a safety
concern. If the unit is adjusted too high, only efficiency is lost.
If the unit is adjusted too low, the low draft pressure switch
will not allow the feed motor or the igniter to operate.
Figure 5.15
Silicone Draft Meter Port
The Draft Test Port can be accessed
behind the ash pan cover
on the left hand side of the unit above the spring latch.
• DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE
SERVICING ANOTHER APPLIANCE.
• DO NOT CONNECT TO ANY AIR DISTRIBUTION
DUCT OR SYSTEM.
May allow flue gases to enter the house
CAUTION
!
I. Firebox Draft and Combustion Fan RPM
These units are pre-tested at the factory with exactly 120 VAC,
60 Hz. They are checked and adjusted for firebox tightness,
gasket leakage, motor operation and igniter operation. The
P35i-C is then factory set at a mid-point adjustment and in
most cases will not need any adjustments.
Check and record the firebox draft before installing venting
and after venting is installed
(before starting fire)
.
There is a silicone draft meter port located behind the ash
pan cover on the left hand side of the unit above the spring
latch. Install the magnahelic meter
(capable of at least .5” of
water column)
Figure 5.15.
Considerations for successful draft include:
• Negative pressure in the firebox
• Location of appliance and chimney
To measure the draft or negative pressure on your appliance
use a magnahelic or a digital pressure gauge capable of
reading 0 - 1 inches of water column (W.C.).
The appliance should be running on high for at least 15
minutes for the test.
With the stove running on high you should have a negative
pressure equal to or greater than the number given in the
chart below. If you have a lower reading than you find on the
chart, your appliance does not have adequate draft to burn
the fuel properly.
Plug unit into a 120 VAC, 60 Hz outlet.
Go to the “Home Screen”, the power icon should be gray.
Press menu, on the first menu press “test”.
The test screen has 4 component test modes. The second
icon is for the combustion fan test.
One press of the icon turns the combustion fan to full line
voltage.
(Note: During this test , the combustion fan will
not achieve its top RPM of 3200 due to the density of the
ambient air.)
All RPM displays could vary +/- 50 from that
of the set RPM’s. Allow several minutes for the fan motor to
warm up.
MAGNEHELIC
INCHES OF WATER
0
.10
.20
.30
.40
.50
