Air Throw From Nozzles

The above throws  are based on air volumes listed in this bulletin for floor  mounted heaters with standard inlets and discharge. As the air throw from a heater is subject to many variable conditions, the figures shown above   should be used only as a guide.

* Required for one-pipe pressure system only.

** Added for two-pipe suction system.

Engineers  Specifications

Furnish and install the following Hastings Paraflo indirect-fired space heater.

GENERAL

Each unit shall be shop assembled and wired, flame tested at the factory and shipped as a packaged assembly. Stack, external wiring and piping shall be furnished and installed by the contractor.

COMBUSTION SECTION

The primary combustion chamber shall be of all welded, 400 series stainless steel construction, with a minimum of 16 gauge material. The chamber shall be designed for a minimum of two-pass flame travel within the chamber and the amount of heat transfer shall be approximately 75% of the total heat output. A port for observing the main flame shall be provided on the same end of the combustion chamber as the burner.

The secondary shall be of mild steel tubes and headers.

CASING

The portion of the casing enclosing the warm of air fans shall have screened inlets. A pressure relief door and an observation port shall be provided on the end of the casing where the burner is mounted.

FANS AND DRIVES

Each heater shall be equipped with centrifugal fan(s), statically and dynamically balanced, and mounted on a heavy-duty, cold-rolled steel shaft of a size limiting first critical speed to at least 25% above maximum operating speed. The fan(s) shall be driven by an adjustable sheave V-belt arrangement sized for 35% greater  than the required brake horsepower. The motor shall have an adjustable mount.

BURNERS

Gas (G)- A power -type burner shall employ power spark ignition and main burner power ignition for use with (natural gas) (LP gas) (LP gas/air mixture.) Burner shall include in the standard manifold a main gas electric shut-off valve, main and pilot gas pressure  regulator for maximum inlet pressure. Minimum inlet pressure is 4 ounces.

Light Oil (LO) - A power-type oil burner, suitable for burning fuels through #2 grade, shall employ high pressure oil automation; with mechanically forced draft, and shall incorporate an oil pump, combustion&; air fan and drive, and combustion ; air damper.

CONTROLS

Controls; shall be factory mounted and shall include; a control transformer, bonnet fan and limit switch, low voltage transformer, electric fan relay; with pilot flame safeguard and all necessary relays; and switches.

On-Off space thermostat shall be furnished for field mounting and wiring.

Control current shall be 115/24&; volt (Oil), 115 volt (Gas).

OPTIONS AND ACCESSORIES

The following  options and accessories shall be provided  (select from page 3 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.