Furnish and install the following
Hastings (gas) (oil) (combination gas/oil) heating equipment:
Item
NO. |
Model
NO. |
SCFM |
Motor HP/
Volts/Phase |
Burner
Output
(MBH) |
Fuel Consumption
(Gas-CFH) (Oil-GPH) |
(Gas) (Oil)
Pressure |
The heater shall consist of the following basic
assemblies:
1. Fan Section - Fan section shall have heavy-duty,
turbine-bladed, propeller fans. All fans will be tested in accordance with AMCA standards
and driven by a V-belt arrangement consisting of a three-phase, open, dripproof type motor
on an adjustable mount. Intake to be low velocity type.
2. Cabinet Section - The portion of the casing
enclosing the heat exchanger shall be backed with a carbon steel radiation shield. Air
must travel up both sides of the radiation shield to ensure that radiation and
transmission loss is less than 2%. Discharge plenum shall be of the low velocity type. All
extensions shall be prefabricated, painted to match basic cabinet, and easily bolted into
place. Surfaces are to be cleaned and painted with heat and corrosion resistant industrial
enamel.
3. Heater Section -
A. The primary heat exchanger shall be of all-welded
#430 stainless steel construction with a minimum of 16 gauge material and shall have no
refractory lining. The chamber shall be designed for a minimum of two-pass flame travel
within the exchanger and approximately 75% of the total heat transfer shall be within the
primary area.
B. The secondary heat exchanger shall consist of a minimum
of two staggered sections of (black carbon) (stainless) steel tubes. The black carbon
tubes shall be expanded, and stainless steel tubes welded, into collection boxes at each
end. A removable plate shall be provided to enable access to all tubes for cleaning
purposes. Stainless steel secondary tubes shall be furnished when air temperature rise on
low fire is below 20 degrees F. Heat exchangers of less than four-pass arrangement will
not meet the requirements of the energy efficiency standards of this specification.
C. The burner shall be (Hi/Lo/Off) (Modulating) type
for burning (natural gas) (propane) (#2 oil) (combination gas/ #2 oil). (Insert
burner description shown on page 4 of this bulletin).
D. The combustion exhaust gas system shall include a
heavy-duty exhaust fan, three phase motor, belt, or direct drive and adjustable pitch
sheave. The complete assembly will be positioned at the collection box where the
combustion gases leave the heater. This exhaust fan shall provide for suitable pre-purging
of the heat exchanger section. Exhauster RPM to remain at 2000 or below.
E. The flame observation port will be located on the burner
side of the heater.
F. A NEMA 1 control box with dead front disconnect shall be
located on the burner side of the heater. Controls shall include motor starters,
disconnect switch, control and ignition transformer, a primary burner control that
incorporates the electronic principle of flame control and a timer for purging the heat
exchanger before every start-up.
4. Temperature Control - Electronic temperature control
system shall consist of an (unmounted) (mounted) (Hi/Lo/Off) (Modulating) room thermostat.
5. Testing and Service - Heater(s) shall be piped,
wired and flame tested before leaving factory. Optional start-up service and instructions
to owner's personnel shall be.furnished by unit manufacturer's field service engineer.
6. Options and Accessories - The following items are to
be furnished: (Insert desired items from page 4 of this bulletin.)
In order to maintain our policy of continuous product
improvement ,we reserve the right to change prices ,specifications ,ratings or dimensions
without notice or obligation.
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