The Reznor® Model PEH & REH Electric Heat Air Handler
Models PEH and REH come in 4 cabinet sizes featuring a total of 13 electric heat sizes. When matched with the optional SCR modulating control, the air handler provides precise heating from standard room heating to 100% outside air ventilation applications.
Standard features include high temperature limit control and centrifugal belt-driven blower capable of up to 3” w.c. of total static pressure. Both the forward curved blower and the blower motor are factory installed on vibration isolation mounts. All published airflow data are supported by AMCA tested and rated airflow performance curves. The energy usage of the system has been designed to meet the current ASHRAE Standard 90.1 (maximum 1.2 bhp per 1000 cfm).
Optional features include factory-assembled, modular sections — a draw-through cooling coil cabinet module with either chilled water or DX coil (with or without reheat), unit mounted disconnect, on/off air damper, and an inlet air mixing box module with a variety of configurations, damper options and an evaporative cooling module. Optional dH cooling is also available to provide dehumidification of 100% outside air or a mixture of outside/return air. The self contained dedicated ReHeat pump™ provides 12°F – 17°F reheat temperature rise from the main evaporator coil discharge. The DX cooling coils are optimized for best performance when the reheat pump is on or off. For precise control, modulating reheat can be added. A complete heating and cooling advanced digital control package is available in addition to common industry standard analog makeup air controls. Model REH can include an optional downturn discharge air plenum and an intake weather hood with rain baffles (cabinet mounted on/off air damper can be used in conjunction with weather hood).
STANDARD FEATURES:
● ETL certification
● 20°-75°F temperature rise (20° temperature rise not available on all sizes. See technical data table.)
● Double wall cabinet construction (Model REH)
● Pre-coat white gloss cabinet finish (all units); 60 gloss minimum and RAL 9001, meets ASTM B117 specification for salt spray for 1,000 hours (Model REH only)
● Circuit breaker protected transformer for 24-volt controls
● High temperature limit control
● Vibration/noise isolated blower(s) and blower motor with rubber isolators (optional spring isolators)
● L50 bearing rating with a life expectancy of 150,000 hours
● Reverse airflow limit switch
● Airflow pressure switch to verify circulating blower operation on makeup air options
● Socketed, high quality switching relays to facilitate service
● All service connections from a single side
● Through-the-cabinet or through-the-base electrical
● Three hinged service doors with heavy duty hardware
● Pre-coat white gloss cabinet finish
● Model PEH – slab or floor mounted; or ceiling suspended (4, 6 or 8 point base suspension based on modules selected); Model REH – 4-point lift eyes for rooftop or slab mounting
● Fork lift openings built into the heavy gauge steel base (Model PEH)
● Heavy gauge steel base (Model REH)
● Discharge duct flange
Factory-Installed Options:
● UV germicidal lamps – ultraviolet emitter for neutralization of VOCs and airborne micro-organisms for improved IAQ – not filtration. (Requires cooling coil cabinet Option AU. Separate 208/1 or 230/1 wiring/breaker and a separate disconnect must be provided.)
● Supply voltage – 208/1; 230/1; 208/3; 230/3; 460/3; 575/3
● Unit mounted, lockable, non-fused service on/off switch
● Inlet air filters – 2” disposable or permanent; 2”, or 4” pleated disposable; arranged in vertical flat bank for ease of service
● Convenience outlet (requires separate power supply)
● Controls
◊ Space temperature heating only
– Analog single-single or two-stage thermostat control (thermostat is available as a shipped-separate accessory or may be field-supplied)
◊ Space or discharge temperature heating/cooling (FX06/07 platform) (optional room command module required for space control)
– Single-stage, two-stage heating/three-stage cooling
– Electronic modulation heating (SCR) three-stage cooling, reheat control, reheat control
◊ Discharge temperature heating/cooling makeup air
– Single-stage, two-stage heating/three-stage cooling with room command module reset
– Electronic modulation heating (SCR) three-stage cooling with room command module reset, reheat control
● Cabinet configuration and construction
◊ Left or right side controls
◊ No insulation; single or double wall with standard insulation (Model PEH)
◊ High R-value insulation (all units)
◊ Blower cabinet screen (Model PEH)
◊ Inlet duct connection flange, or inlet on/off damper with duct flange
◊ Blower cabinet screen, inlet duct connection flange, or inlet on/off damper with duct flange
● Mixing Box Module
◊ Five inlet configuration combinations including top, bottom, and rear (Model PEH)
◊ Three inlet configuration combinations with 100% bottom return air opening and/or 100% outside air rear opening (Model REH)
◊ Inlet air configuration with 30% outside air opening and 100% return air opening (Model REH)
◊ Manual, motorized 2 or 3 position, motorized modulating return air or outside air and return air dampers
◊ Direct-coupled 24VAC damper actuators
◊ Damper control selections such as 0-135 ohms resistance potentiometer, building pressure, or 0-10 v control
◊ Bottom return air screen (Model REH)
● Double wall downturn plenum cabinet (Model REH)
◊ Shutoff dampers
● Blower motor (1/4 to 5 HP) – see pressure drops and blower charts
◊ Open dripproof, TEFC (motors meet EISA specifications for efficiency)
◊ Adjustable sheave and belt
◊ Motor contactor; IEC motor starter; or factory-installed variable frequency drive
● Cooling coil module with coil
◊ DX coil (single, 50/50, or 1/3-2/3 circuit; galvanized or stainless casing; copper or aluminum fins (coated or uncoated) – non-ozone depleting, R410A refrigerant
◊ Chilled water coil (3-45 tons; 1/4, 1/2, 3/4, or full circuiting; galvanized or stainless casing; copper or aluminum fins (coated or uncoated)
● DX coil module with dehumidification control. Single, dual and 1/3-2/3 circuit; Galvanized or stainless casing;
Copper or aluminum fins; Coated and uncoated; Modulating or standard reheat control
● Evaporative cooling module
◊ White pre-painted or 300 series stainless steel cabinet
◊ 300 series stainless steel reservoir
◊ Recirculating pump or AquaSaver microprocessor-based, timed water distribution system
– Water recirculating pump with optional (field installed) fill and drain kit
– AquaSaver water metering device with optional (field installed) freeze protection
◊ 12” CELdek® or GLASdek® UL 900 Class II noncombustible media
◊ 1” or 2” aluminum pre-filter
◊ Water hammer arrestor (field installed)
● Firestat
● Discharge temperature low limit
● Over/under voltage or phase loss protection
Field-Installed Options:
● Variable frequency drive (factory-installed is also available)
● Thermostats to match analog controls
● Smoke detector (in ductwork)
● Remote control console and unit monitoring
● Fusible and non-fused disconnect switch (NEMA 3R) (Model REH)
● 16” insulated roof curb (Model REH)
● Intake air hood with rain baffles (Model REH)
● Perimeter roof curb transitions to (C)RGB/RPB roof curbs – for replacement of Models (C)RGB/RPB (Model REH)
● Main unit disconnect switch
● M-Series condenser