Rinnai E75CN - Manual (Page 103)

Installation & Servicing Instructions Rinnai E-Series
103
19 Common venting guidelines
Do not common vent with the vent pipe of any other boiler or appliance. However,
when an existing boiler is removed from a common venting system, the common
venting system is likely to be too large for proper venting of the appliances remaining
connected to it. At the time of removal of an existing boiler, the following steps shall
be followed with each appliance remaining connected to the common venting system
placed in operation, while the other appliances remaining connected to the common
venting system are not in operation:
(a) Seal any unused openings in the common venting system.
(b) Visually inspect the venting system for proper size and horizontal pitch and deter-
mine there is no blockage or restriction, leakage, corrosion and otherdeficiencies
which could cause an unsafe condition.
(c) Insofar as is practical, close all building doors and windows and all doors between
the space in which the appliances remaining connected to thecommon venting
system are located and other spaces of the building. Turn on clothes dryers and
any appliance not connected to the common venting system. Turn on any exhaust
fans, such as range hoods and bathroom exhausts, so they will operate at maxi-
mum speed. Do not operate a summer exhaust fan. Close fireplace dampers.
(d) Place in operation the appliance being inspected. Follow the lighting instructions.
Adjust thermostat so appliance will operate continuously
(e) Test for spillage at the draft hood relief opening after 5 minutes of mainburner
operation. Use the flame of a match or candle, or smoke from acigarette, cigar or
pipe.
(f) After it has been determined that each appliance remaining connected to the com-
mon venting system properly vents when tested as outlined above,return doors,
windows, exhaust fans, fireplace dampers and any other gas burning appliance
to their previous condition of use.”
(g) Any improper operation of the common venting system should be corrected so the
installation conforms with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/
or CAN/CSA B149.1, Natural Gas and Propane Installation Code. When resizing
any portion of the common venting system, the common venting system should
be resized to approach the minimum size as determined using the appropriate
tables in Part 11 of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or
CAN/CSA B149.1, Natural Gas and Propane Installation Code.