LH-R
Horizontal with Rear Return Air Plenum
The Horizontal with Return Air Plenum (LH-R/low static and HL-R/high static) is our basic model with a galvanized rear return air plenum. Ideal for mounting above ceilings, in closets, hallways and bathroom areas, the plenum conceals the unit's blower motor which is easily accessible for service by removing the bottom panel. Available as a rear return CH-R or bottom return LH-Q. Comes with throwaway filter.
Galvanized Steel
Construction
3600 f.p.m.
Max Air Velocity
300 PSIG
Max Working Pressure
200°F
Max Water Temp
Project Documents
Downloads
Technical Details
Features & Specifications
Chassis
All unit chassis shall be fabricated of heavy gauge galvanized steel panels with 1/2" thick, 3.35 pound per cubic foot, dual density fiberglass insulation rated for a maximum air velocity of 3600 f.p.m. Insulation shall conform to UL 181 for erosion and NFPA 90A and 90B for flame spread (25) and smoke developed (50) rating per ASTM E-84 and UL 723. All plenum units shall have a minimum 1" duct collar on the discharge and minimum 1" duct collar on the return.
Available Options
- Foil faced insulation meeting ASTM Standards C665 and C-1136 for biological growth
- Elastomeric closed cell foam insulation with antimicrobial performance rating of zero per ASTM G21
- Quick open fasteners for bottom access panels on exposed units
- Double deflection discharge grille with rear or bottom return grille for exposed units
Fan & Motor
Unit fan shall be a dynamically balanced, forwardly curved, DWDI centrifugal type constructed of heavy gauge zinc coated galvanized steel for corrosion resistance. Motors shall be high efficiency, permanently lubricated sleeve bearing, permanent split capacitor type with UL and C-UL listed automatic reset thermal overload protection and three separate horsepower taps. Plenum unit fan assemblies shall be easily serviced through an access panel provided.
Available Options
- Silent switching devices for fan speeds
Coil
All cooling and heating coils shall optimize rows and fins per inch to meet the specified capacity. Coils shall have seamless copper tubes and shall be mechanically expanded to provide an efficient, permanent bond between the tube and fin. Fins shall have high efficiency aluminum surface optimized for heat transfer, air pressure drop and carryover. All coils shall be hydrostatically tested at 350 PSIG air pressure under water, and rated for a maximum of 300 PSIG working pressure at 200°F maximum water temperature.
Available Options
- Coil casing fabricated from 304 stainless steel
- Manual air vent fitting for coil venting
- Automatic air vents in lieu of manual air vents
Electric Heat
Electric resistance heating assembly as an integral part of the fan coil unit, with the heating capacity, voltage and kilowatts scheduled. The heater assembly shall be designed and rated for installation without duct extensions or transitions. All heating elements shall be open coil type Nichrome wire mounted in ceramic insulators. All heaters include over temperature protection with automatic reset primary thermal limit and backup secondary thermal limit.
Available Options
- Silent switching devices for electric heat
Filter
All plenum units shall be furnished with a minimum 1" nominal glass fiber throwaway filter. Filters shall be tight fitting to prevent air bypass. Plenum unit filters shall be easily removable from the bottom or rear of the unit without the need for tools.
Available Options
- 2" pleated filters rated at 25-30% efficiency and MERV 6
- Electrical junction box with terminal strip for motor and other terminations
Piping Package
Factory assembled valve piping package consisting of a 2 or 3 way valve body, on/off motorized electric control valve and two isolation ball valves. Control valves are piped normally closed to the coil. Maximum entering water temperature on the control valve is 180°F, and maximum close-off pressure is 75 PSIG (1/2") or 50 PSIG (3/4"). Maximum operating pressure shall be 300 PSIG.
Available Options
- 3 wire floating point modulating control valve
- Fixed or adjustable flow control device
- Pressure temperature ports for each piping package
WARNING: This product can expose you to chemicals including epichlorohydrin which is known to the State of California to cause cancer and birth defects and/or other reproductive harm. For more information go to p65warnings.ca.gov
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