Gas Piping - Harsco Industrial MACH C1500GG Installation & Owner's Manual

3.5.6 Removing an Existing Boiler
(from a common venting system)
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, while the other appliances remaining connected to the common venting
system are not in operation, the following steps should be followed with each appliance remaining connected to the
common venting system placed in operation:
1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and horizontal pitch and determine that there is no blockage or
restriction, leakage, corrosion or other deficiency which could cause an unsafe condition.
3. Insofar as is practical, 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. Place the appliance being inspected in operation. Follow the lighting instructions. Adjust the thermostat so that
the appliance will operate continuously.
5. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a
match or candle or smoke from a cigarette, cigar or pipe.
6. After it has been determined that each appliance remaining connected to the common 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 conditions of use.
Any improper operation of the common venting system should be corrected so the installation conforms with the
National Fuel Gas Code, ANSI Z223.1 and CSA B149 Installation Code. When resizing any portion of the common
venting system, the common vent system should be resized to approach the minimum size as determined using the
appropriate tables.
3.6 G P
AS IPING
Before making the gas hook-up, make sure the boiler is being supplied with the type of fuel shown on the boiler
nameplate.
The boiler shall be installed such that the gas ignition system components are protected from water (dripping,
spraying, rain, etc.) during appliance operation and service (circulator replacement, control replacement, etc.)
The boiler is factory fire-tested and adjusted for proper combustion with natural gas supply pressure of 7" W.C.
Typical gas pressure supply for natural gas is 7" W.C. The gas train components are certified to handle a maximum
inlet pressure of 14" W.C. (1/2 psig.). If the available gas pressure exceeds 14" W.C., a suitable additional
intermediate gas pressure regulator of the "lock up" type must be provided to reduce the pressure to less than 14"
W.C.
to the action of liquefied petroleum gases. Do not use Teflon tape on gas line threads.
All threaded connections must be made using a pipe compound that is resistant
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MACH® Gas-Fired Boiler