Dimensional Information Required For Connection Of The Boiler - DeDietrich GT 430 A Operating Instructions Manual

2 Replacement procedures
• 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 the 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 t he ven ting syst em fo r prope r size and
horizontal pitch and determine there is no blockage or restriction,
leakage, c orrosion a nd o ther de ficiencies which could cause an
unsafe condition,
(c)Insofar as is practical, close all building doors and windows and
all do ors be tween the sp ace in wh ich the ap pliances re maining
connected to the common ve nting system are located an d the
other spaces of th e bu ilding. Tu rn on clo thes d ryers a nd a ny
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 the maximum speed.
Do not operate a summer exhaust fan. Close fire place dampers.

3 Dimensional information required for connection of the boiler

GT 408 A to GT 410 A
10"
Ø A
82294154
5 "
1/8
Ø A
39 "
7/8
GT 411 A to GT 414 A
12"
(d)Place in operation the appliance being inspe cted. Follow the
lighting instructions. Adjust ther mostat so appliance will operate
continuously,
(e)Test for leakage at the draft hood relief opening after 5 minutes of
main burner operation.
(f)After it h as be en d etermined tha t e ach a ppliance remaining
connected to the co mmon vent ing syste m prop erly ven ts when
tested as o utlined ab ove, return do ors, wind ows, e xhaust fans,
fireplace dampers and any o ther gas-b urning appliance to their
previous condition of use,
(g)Any improper operation of the common venting system should be
corrected so the installatio n conforms with the National Fuel Gas
Code, ANSI Z223.1 and/or CAN/CGA B149 Installation Codes. When
resizing any of the common venting system, the common ven ting
system should be resized to appro ach the minimum size as
determined using the appropriate tables in Part II of the National Fuel
Gas Code, ANSI Z223.1 and/or CAN/CGA B149, Installation Codes.
(h)The minimum distance from adjacent public walkways, adjacent
buildings, openable windows and building openings shall not be less
than those values specified in the National Fuel Gas Code ANSI
Z223.1 and/or CAN/CGA B149, Installation Codes.
The boiler must be connected to a venting system
that safely discharges all flue gases to the outside in
an effective manner.
The sizing of the boiler breeching and chimney
venting must follow local and national code
requirements.
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11-20-09