Options and Accessories

General :

Horizontal unit blower arrangement -- horizontal up flow (HR - 3) available.

Vertical unit blower arrangement -- three Vertical Up and three Vertical Down as illustrated below.

ETL Label Available

Components:

Weatherproof unit - for outdoor installations including hinged and latched weatherproof control enclosure.

Insulated blower section - 1 inch, 2 pound density, mat face fiberglass insulation up to leaving air side of burner profile plates.

Insulated burner section - available on all units.

Storm proof weatherhood - with birdscreen. Installed on air intake of horizontal, HR-1 and HR-2, weatherproof units. Not available with optional vertical blower arrangements.

Birdscreen - for installation on the air intake of units with optional vertical blower arrangements.

Filter section - with "V" or "Z" frames for mounting 2 inch throwaway, cleanable or extended surface filters. A clogged filter switch with indicating light is available as an optional item. Filter section can also be insulated. Available for return air also.

Shut-off dampers - complete with two position damper motor and end switch. Discharge air damper suggested for indoor installations. Low leakage dampers are also available.

Discharge air louvers - adjustable horizontal or vertical bladed louvers are available for mounting on the blower outlet. These louvers can be combined for double deflection air control.

Service platform - With guardrail per OSHA standard. Service platforms are available for indoor horizontal units only.

Vibration isolators - either "rubber-in-shear" or spring type for floor or roof mounting, or indoor suspension.  Not compatible with curb mounted units. Vibration isolators are shipped unmounted. Internal fan/motor isolation is also available (Horizontal only)

Extended grease lines - for remote greasing of fan bearings from the control side of unit.

Panels - U.L labeled main or remote panels.

Burner - 50 to 1 turndown available (Not compatible with Selector)

Variable pitch sheave - for motors 15 HP and larger. Variable pitch sheaves are standard for motors 10 HP and smaller.

Motors :

Totally enclosed, two speed, explosion proof, automotive duty or chemical duty motors available on all units. Premium Energy Efficient available.

Roof curbs :

Adapter frames and roof curbs available for horizontal units. Roof curbs are shipped knocked down.  Discharge duct adapters are standard on HR-2 units with discharge dampers.

Miscellaneous :

Motor and controls can be mounted on opposite side. Matching cooling coil, heat reclaim coil, electric heater and evaporative cooling sections available for all models.

Electric Controls :

Fused disconnect switch - dead front fused disconnect switch or circuit breaker mounted in cover of main control box.

Blocked intake switch - complete with indicating light. Warning light is turned on in case of excessive pressure drop across intake.

Low Outlet temperature shut-off - Shuts off blower, after time delay, if unit delivers cold air due to burner failure.

Pre-purge cycle - Blower purges unit cabinet for selected time, 7 second minimum, before burner turns on.  Not normally required unless unit can fill with combustible vapors between cycles.  The item furnished as standard with FM and IRI controls.

Circuit analyzer - provides a network of indicating lights to check circuit continuity.  Simplifies identification of malfunctioning control.

Ultra-violet flame sensor - ultra-violet flame sensing is used in place of standard flame rod system.  Desirable for applications where excessive condensation of moisture is encountered.

Night setback thermostat - cycles blower-burner on basis of space temperature. Night control can either be energized manually or by a time clock.

Note : Burner and Gas control options on page 6

VERTICAL UNIT BLOWER DISCHARGE ARRANGEMENTS

(All sections and components are supported by special base frame and vertical support channels)

* (Standard support channel heights 112 thru 218 - 24", 222 thru 233 - 26", 240 - 48")