The Reznor® Model PDH High Efficiency Gas Heating Air Handler
Reznor’s PDH is the new indoor, power-vented addition to the Reznor brand line of Pre-Engineered Ventilation Airhandlers (PREEVA).

Model PDH is available in 11 sizes from 75MBH to 400MBH. Each size is designed for a minimum 81% thermal efficiency and is available for use with either natural gas or propane. The model PDH can be configured for space conditioning or 100% outside air. You can also specify cooling coils for DX or chilled water or evaporative cooling.

Model PDH indoor, power-vented heaters are approved for commercial/industrial installations in the United States and Canada by the ETL Testing Agency.

STANDARD FEATURES:
● ETL certification
● Minimum 81% thermal efficiency
● Maximum 100 degree F temperature rise
● Circuit breaker protected transformer for 24-volt controls
● Integrated circuit board with diagnostic indicator lights
● Multi-try direct ignition with 100% lockout
● High temperature limit control
● Vibration/noise isolated venter motor and blower motor
● L50 ball bearings with 150,000 hour bearing life
● Reverse airflow limit switch
● Airflow pressure switch to verify circulating blower operation on makeup air options
● Easily convertible single gas orifice system
● Socketed, high quality switching relays to facilitate service
● All service and vent connections from a single side
● Vent runs up to 50 feet
● Through-the-cabinet or through-the-base electrical
● Engineered condensate management disposal system
● Three hinged service doors with heavy duty hardware
● Pre-coat RAL 9010 white paint finish
● 4-pt base suspension; or slab or floor mounting
● Fork lift openings built into the heavy gauge base

Factory-Installed Options:
● TCORE2® Titanium Stabilized Heat Exchanger -aluminized steel, 409 stainless steel, or 316 stainless steel (stainless steel heat exchanger required for 60° – 100°F temperature rise)
● Heat Exchanger Extended Warranty – 5-year or 10-year
● Natural Gas or Propane
● Controls – Analog & Digital
◊ Space Temperature Heating only
– Analog single or two-stage gas valve with room thermostat control (thermostat is available as a shipped-separate accessory or may be field-supplied)
◊ Space Temperature Heating/Cooling
– Digital two-stage heating/three-stage cooling with room command module
– Digital electronic modulation heating (33% low fire)/ two-stage cooling with room command module
◊ Discharge Temperature Makeup Air
– Analog 2-stage with 2-stage ductstat or electronic sensor and 2-stage valve; high fire/33% low fire modulating control
◊ Discharge Temperature Heating/Cooling Makeup Air
– Digital two-stage heating/three-stage cooling with room command module
– Digital electronic modulation heating (33% low fire)/ two-stage cooling with room command module
● Supply Voltage – 115/1; 208/1; 230/1; 208/3; 230/3; 460/3; 575/3
● Unit mounted, lockable, non-fused service switch
● Inlet Air Filters – 1″ or 2″ disposable or permanent; 1″, 2″, or 4″ pleated disposable; arranged in vertical flat bank for ease of service
● Cabinet Configuration and Construction
◊ Left or right side controls
◊ No insulation; single or double wall with standard or high R-value insulation
◊ Blower cabinet screen
◊ Inlet duct connection flange
◊ Discharge duct flange or louvers (horizontal or horizontal and vertical)
● Mixing Box Module with five inlet and discharge configuration combinations including top, bottom, and rear
◊ with manual, motorized 2 or 3 position, or motorized modulating return air or outside air and return air dampers
◊ with direct-coupled 24VAC damper actuators
◊ with damper control selections such as 0-135 ohms resistance potentiometer, building pressure, or 0-10 v control
● Blower Motor (1/4 to 5 HP) – see pressure drops and blower charts
◊ Open dripproof, TEFC, premium efficiency, or 2-speed open dripproof
◊ with adjustable sheave and linked or solid belt
◊ with motor contactor; IEC motor starter; or factory-installed variable frequency drive
● Cooling Coil Module –
◊ with DX coil (single, dual or 1/3-2/3 circuit; galvanized or stainless casing; copper or aluminum fins (coated or uncoated))
◊ with 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))
● Evaporative Cooling Module –
◊ with recirculating pump or AquaSaver timed water distribution
◊ with 6″ or 12″ cellulose or UL cellulose media
◊ with 1″ aluminum pre-filter
● Electronic Air Filter Module –
● Convenience Outlet
● Firestat
● Discharge Temperature Low Limit
● Over/Under Voltage or Phase Loss Protection
● High Ambient Limit (burner cutoff)
● Gas Pressure Switches (high, low, or both)

Field-Installed Options:
● Variable Frequency Drive (factory-installed is also available)
● Downturn Nozzles (25-65 deg. or 50-90 deg. angle) with directional louvers
● Thermostats to match analog controls
● Gas Pressure Regulator
● Smoke Detector (in ductwork)
● Remote Control Console and Unit Monitoring
● Main Unit Disconnect Switch
● Fill and Drain or Freeze Protection Kit (for evaporative cooler)
● Vent Cap