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common venting system. Turn ON any exhaust fans,
such as range hoods and bathroom exhausts, so they
will operate at maximum speed. Do not operate a
summer exhaust fan. Close fireplace dampers.
4.
Follow the lighting instructions. Turn ON the appliance
that is being inspected. Adjust the thermostat so that
the appliance operates continuously.
5.
After the main burner has operated for 5 minutes, test
for leaks of flue gases at the draft hood relief opening.
Use the flame of a match or candle.
6.
After determining that each appliance connected to
the common venting system is venting properly, (step
3) return all doors, windows, exhaust fans, fireplace
dampers, and any other gas burning appliances to
their previous mode of operation.
7.
If a venting problem is found during any of the
preceding tests, the common venting system must be
modified to correct the problems.
Resize the common venting system to the minimum
vent pipe size determined by using the appropriate
tables in the current standards of the National Fuel
Gas Code ANSI Z223.1.
REPLACING FURNACE THAT WAS PART OF A
COMMON VENT SYSTEM
CHIMNEY
OR GAS
VENT
(Check sizing
for water
heater only)
FURNACE
(Replaced
by SLP98)
If this gas furnace replaces a furnace that was commonly vented
with another gas appliance, the size of the existing vent pipe for that
gas appliance must be checked. Without the heat of the original
furnace flue products, the existing vent pipe is probably oversized
for the single water heater or other appliance. The vent should be
checked for proper draw with the remaining appliance.
Figure 44.
Page 30 of 66
WATER
HEATER
OPENINGS
(To Adjacent
Room)
Issue 1809
Electrical
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
Electrostatic discharge can affect electronic components.
Take precautions during furnace installation and service
to protect the furnace's electronic controls. Precautions
will help to avoid control exposure to electrostatic
discharge by putting the furnace, the control and the
technician at the same electrostatic potential. Neutralize
electrostatic charge by touching hand and all tools on
an unpainted unit surface, such as the gas valve or
blower deck, before performing any service procedure.
Figure 45. Interior Make-Up Box Installation
Figure 46. Interior Makeup Box Installation
The unit is equipped with a field makeup box. The makeup
box may be moved to the right side of the furnace to
facilitate installation. If the makeup box is moved to the right
side, clip the wire ties that bundle the wires together. The
excess wire must be pulled into the blower compartment.
Secure the excess wire to the existing harness to protect
it from damage. Seal unused openings on left side with
plugs removed from right side.
CAUTION
507028-03
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