Adams Condensing Oil-Fired Furnace - Manual (Page 19)

Drill a 3/8” hole in the PVC exhaust vent piping
approximately 18" above where the PVC exits
the side of the furnace for your combustion
analysis equipment. (Seal with RTV silicone
when finished conducting combustion analysis).
BURNER
1) Operate burner for 15 minutes before
conducting test wortc.
2) Adjust burner settings until a trace (0-1 on
a smoke scale of 10) is obtained with smoke
test pump.
3) Read C02%. This should be
approximately 13.0%.
4) Increase air to burner to reduce C02% 1.0
to 1.5% less than where you were able to
obtain a trace of smoke.
77 j / s procedure allows a margin of reserve for
variable conditions.
5) Re-check smoke to insure it is 0.
Your final C02% should be
approximately 11.5%
Check vent stack temperatures as beiow:
и
0
D
E
L
APPROX.
AMBIEtrr
PLUS
STACK
TEMP F.
INPUT
RATE
THERMAL
EFFICIENCY
50 20-24 56,000 97-99%
75 27-31 82,000 95-97%
100 29-33 100,000 94-96%
125 38-42 115,000 92-94%
Temperature Rise
Temperature rise must be within the range
below. An incorrect temperature rise may
result in condensing in or overheating of the
heat exchanger.
Detennine and adjust temperature rise as
follows:
Model Temp. F.
Degree Rise
50-2.6 50-60
75-2.5 55-65
100-2.5 60-70
50-5 30-40
75-5 35-45
100-5 45-55
125-5 50-60
1
.
2
.
Operate furnace with burner firing for
approximately ten minutes. Ensure all
registers are open and all duct dampers are
in their final (fully or partially open) position.
Place thermometers in the return and supply
ducts as close to the furnace as possible.
Thermometers must not be influenced by
radiant heat by being able to "see" the heat
exchanger
HEAT EXCHANGER
RADIATION TJ NE OF SIGHT-
3.
4.
Temperature Rise Measurement
Subtract the return air temperature from
the supply air temperature to determine the
air temperature rise. Allow adequate time
for thermometer readings to stabilize.
Adjust temperature rise by adjusting the
circulator blower speed. Increase blower
speed to reduce temperature rise.
Decrease blower sp^ to increase
temperature rise.
Set thermostat heat anticipator setting at 0.2 A
as a base point. Operate furnace and measure
anticipation amperage and adjust thermostat to
manufacturer's instructions.
CIRCULATOR BLOWER SPEEDS
This furnace is equipped with a multi-speed
circulator blower. This blower provides ease in
adjusting blower speeds These blower speeds
should be adjusted by the installer to match the
installation requirements so as to provide the
correct heating temperature rise and correct
cooling CFM.
To adjust the circulator blower speed, proceed
as follows;
1. Turn OFF power to the furnace.
Relocate desired motor leads to the
circulator blower terminals on the terminal
block as required.
Turn ON power to furnace.
Verify proper temperature rise as outlined in
Section XIV, Startup Procedure and
Adjustment - Temperature Rise.
2
.
3.
4.
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