Removal Of Existing Boiler - Viessmann VD2-320 Installation Instructions Manual

Vitorond 200, VD2 Series 320 to 1080 Installation

Removal of Existing Boiler

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 venting system are not 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 there
is no blockage or restriction, leakage, corrosion,
or any other deficiency which could cause an unsafe
condition.
3. To determine whether the building is operating
under negative pressure, 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 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 in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat
so appliance will operate continuously.
5. Test for spillage at the barometric draft control
relief opening 5 minutes of high fire/full load burner
operation. Use the flame of a match or a candle,
or an approved test.
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
condition of use.
7. Any improper operation of the common venting
system should be corrected so the installation
conforms with the National Fuel Gas Code, ANSI
Z223.1-1992 or latest edition. When resizing,
any portion of the common venting system should
be resized to approach the minimum size as
determined using the appropriate tables in Appendix
G in the National Fuel Gas Code, ANSI Z223.1.
Connections
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