Magic-Pak HWC8-24 - Venting System; Gas Connections

Page 5 of 18507388-01 Issue 1504
Turn on exhaust fans, such as range hoods and bathroom
exhausts, so they will operate at maximum speed. Do not
operate a summer exhaust fan. Close replace dampers.
4. Following the lighng instrucons, place the unit being
inspected in operation. Adjust the thermostat so the
appliance will operate connuously.
5. Test for spillage at the dra control relief opening aer 5
minutes of main burner operaon. Use the ame of a match
or candle.
6. Follow the preceding steps for each appliance connected to
the common venng system.
7. Aer it has been determined that each appliance remaining
connected to the common venng system properly vents
when tested as outlined above, return doors, windows,
exhaust fans, replace dampers, and any other fuel burning
appliance to their previous condion of use.
8. If improper venng is observed during any of the above tests,
the common venng system must be corrected. See Naonal
Fuel Gas Code, ANSI Z223.1 (latest edion) or CAN/CGA
B149.1 & .2 Canadian Installaon Codes to correct improper
operaon of common venng system.
Gas Connecons
The gas line to the unit should be adequately sized to prevent
undue pressure drop and should never be smaller than the
manual valve used. Consult the local ulity or Naonal Fuel Gas
Code for complete details on special requirements in sizing gas
piping.
The units supplied for operaon with natural gas contain a
gas regulator which must be operated with inlet gas pressures
specied on the rang plate. If gas line pressure exceeds this
gure, an addional high pressure regulator must be installed
to reduce this pressure.
Units for operation with propane must be converted with a
kit supplied by the manufacturer and require for operaon an
inlet pressure of 11” W.C. minimum and 13” W.C. maximum. A
regulator is also required on the propane tank.
If local codes allow use of a exible gas connector, a new listed
connector must be used. Do not use a connector which has
previously serviced another gas appliance.
Venting
The venng system is an integral part of the appliance. The
venng system must not be modied or added on to.
The unit contains a combuson inducer. The inducer draws
the combuson products out of the heat exchanger together
with diluon air and forces the mixture from the unit to the
outside. No special provisions are required for supplying air for
combuson, nor is a chimney required.
The vent outlet must not be altered or extended.
The venng system is designed for proper operaon under all
weather condions and for winds up to 31 m.p.h.
Removal of Unit from Common Venng System
When an exisng furnace is removed from a common venng
system serving other appliances, the venng system is likely to be
too large to properly vent the remaining aached appliances. The
following test should be conducted with each appliance while
the other appliances connected to the common venng system
are not in operaon.
1. Seal any unused openings in the common venng system.
2. Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage or
restricon, leakage, corrosion, or other deciencies which
could cause an unsafe condion.
3. Insofar as is praccal, close all building doors and windows
between the space in which the appliances remaining
connected to the common venng system are located and
other spaces in the building. Turn on clothes dryers and any
appliance not connected to the common venng system.
Insufficient combustion air can cause headaches,
nausea, dizziness or asphyxiation. It will also cause
excess water in the heat exchanger resulting in rusting
and premature heat exchanger failure. Excessive
exposure to contaminated combustion air will result
in safety and performance related problems. Avoid
exposure to the following substances in the combustion
air supply:
Permanent wave solutions
Chlorinated waxes and cleaners
Chlorine base swimming pool chemicals
Water softening chemicals
De-icing salts or chemicals
Carbon tetrachloride
Halogen type refrigerants
Cleaning solvents (such as perchloroethylene)
Printing inks, paint removers, varnishes, etc.
Hydrochloric acid
Antistatic fabric softeners for clothes dryers
Masonry acid washing materials
WARNING
If a exible gas connector is required or allowed by the
authority that has jurisdiction, black iron pipe shall be
installed at the gas valve and extend outside the furnace
cabinet. The exible connector can then be added
between the black iron pipe and the gas supply line.
CAUTION