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Removal of the Furnace from Common Vent
In the event that an existing furnace is removed from
a venting system commonly run with separate gas
appliances, the venting system is likely to properly vent the
remaining attached appliances.
Conduct the following test while each appliance is operating
and the other appliances (which are not operating) remain
connected to the common venting system. If the venting
system has been installed improperly, you must correct the
system as indicated in the general venting requirements
section.
The following steps shall be followed for each appliance
connected to the venting system being placed into
operation, while all other appliances connected to the
venting system are not in operation:
1.
Seal any unused openings in the common venting
system.
2.
Inspect the venting system for proper size and
horizontal pitch. Determine that there is no blockage,
restriction, leakage, corrosion, or other deficiencies
which could cause and unsafe condition.
3.
Close all building doors and windows and all doors
between the space in which the appliances remaining
connected to the common venting system are located
and other spaces of the building. Turn on clothes
dryers and any appliances not connected to the
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 fuming 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 problem.
Resize the common venting system to the minimum vent
pipe size determined by using the appropriated tables in
Appendix G. (These are in the current standards of the
National Fuel Gas Code ANSI Z223.1.)
Page 30 of 73
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 44. Interior Make-Up Box Installation
Figure 45. Interior Make-Up 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 make up 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.
Issue 2241
CAUTION
507029-05
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