GBT A2-035, Инструкция по установке и эксплуатации

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When a boiler is used in connection with refrigeration systems, it must be installed so
the chilled medium is piped in parallel with the heating boiler with appropriate valves
to prevent the chilled medium from entering the boiler. When a boiler is connected to
heating coils located in air handling units where they may be exposed to refrigerated air circulation, it
must be equipped with flow control valves or other automatic means to prevent gravity circulation of the
boiler water during the cycle.
IMPORTANT: Before attempting to start the unit, be sure the system is full and the water is free to flow through
the unit. All air must be relieved from the unit and piping and the pump must be working before the unit is fired.
VENTING SYSTEM
Proper installation of the flue venting is critical for the safe and efficient operation of
your heater/boiler. Failure to conform with any of these requirements may violate
local, state or federal codes as well as create conditions that may cause catastrophic
property damage or personal injury.
The venting system must comply with the National Fuel Gas Code, ANSI, Z223.1 / NFPA 54, Latest Edition, or
for Canada, CAN/CGA B149.1, and all local codes. Venting must be provided to completely remove all gases
and products of combustion to the outside, without condensation in the stack or spillage at the draft hood.
The A2000 heater/boilers are negative vent, non-condensing Category I appliances and can utilize un-insulated
single wall “B” vent connectors. Vent material must be listed by a nationally recognized test agency. Insulated
metal vent pipe must be used for outdoor vent sections in cold climates to reduce condensation. Observe
clearances in accordance with applicable codes from all combustible materials. Use insulated venting or vent
pipe spacers where the vent passes through combustible roofs, floors, and walls.
Natural draft vent systems utilize natural buoyancy of the hot flue products to create the pressure difference that
allows the flue products to exhaust from the flue. The negative pressure draft should be -0.1 to -0.8 inches of
water column when measured 12 inches (30 cm) above the draft hood to ensure proper operation.
Do not reduce the vent diameter and avoid sharp turns in the vent piping. Use the same size stack and draft
diverter as the discharge from the unit. The vent sizes for A-2000 models are:
Model: A2-035 A2-050 A2-070 A2-097 A2-120 A2-140
Vent Diameter
9” 10” 12” 16” 16” 18”
The draft hood that was supplied with you’re A-2000 model must be installed
directly on top of the unit. The draft hood slips over the flue outlet flange.
General Venting Requirements:
•
The maximum and minimum vent length for Category I systems is
determined by the National Fuel Gas Code, or for Canada, B149.
•
Avoid long horizontal runs of vent pipe, reductions, restrictions, and 90
o
elbows. The length of the horizontal run should be as short as possible,
but must not exceed 75% of chimney height.
•
All horizontal runs must slope upward toward the termination at least ¼ inch per foot (2 cm per meter)
and be adequately supported.
•
A2000 models are designed to operate with a negative pressure in the exhaust venting. This appliance
is NOT approved for side-wall venting. Consult your GBT representative or Customer Service if side-
wall venting is required.
•
When any horizontal vent extends for more than 6 feet (1.8 meter), vent supports must be installed with
Draft Hood