Memorial Hermann Best Practices
July, 2013
SECTION 23 82 39 UNIT HEATERS
PART 1 - GENERAL
1.01 WORK INCLUDED
A. Install the following equipment in locations and sizes as shown on drawings and as specified herein:
1. Electric unit heaters
2. Natural Gas fired unit heaters
3. Propane fired unit heaters.
4. Cabinet type unit heaters
5. Hot water unit heaters
6. Convectors
7. Finned radiation
8. Steam unit heaters
1.02 RELATED WORK
A. Division 26: Electrical
1.03 QUALITY ASSURANCE
A. Provide U.L. listing on all units.
B. Provide AGA approval on gas fired units.
1.04 SUBMITTALS
A. Submit product data for review.
PART 2 - PRODUCTS
2.01 ACCEPTABLE MANUFACTURERS
A. Trane
B. Modine
C. Dunham Bush
D. Air Therm
E. Sterling
F. American Air
2.02 EQUIPMENT REQUIREMENTS
A. Electric: Trane Model UHVA with the following features:
1. Casing, heater element, circuit subdivision and fusing where required
2. Cabinet enclosure with directional discharge louvers
3. Wall mounted line voltage thermostat
4. Five year heater element warranty
5. Fan motor, totally enclosed, with thermal overload protection and permanently lubricated
6. High temperature cut out with manual reset
B. Cabinet Unit Heaters-Trane Force-Flo: Florida Cabinet unit heaters of size, type and capacity as indicated on drawings.
1. Vertical cabinet, vertical recessed, horizontal cabinet, or horizontal recessed models as indicated on drawings.
2. Unit includes:
a. Chassis
b. Coil
c. Fan
d. Motor
e. High density fiberglass insulation
f. Stamped lattice outlet and discharge grilles
3. Chassis: Minimum 18 gauge galvanized steel wrap around structural steel frame with all edges flanged.
4. Cabinet finish:
a. All parts cleaned, bonderized, phosphatized, and flow coated with baked-on primer
b. Final finish: Baked on enamel. Color to be approved by Owner's Representative
5. Coils:
a. 5/8" O.D. seamless copper tubes mechanically bonded to configured aluminum fins with continuous fin collars and sleeved coil end supports
b. Maximum working pressure 300 psig, factory burst test 450 psig (air), and leak test 300 psig
6. Motors:
a. Shaded pole or permanent split capacitor as indicated on drawing
b. Thermal overload protection
c. Detachable motor cord with locking prong connector
7. Fans:
a. Centrifugal forward curved, double width wheels
8. Filters:
9. 1" woven glass filters
10. Units wired in accordance with NEC and U.L. listed
C. Horizontal, Hot Water Unit Heaters: Trane Model "S".
1. Unit Includes:
a. Casing: Minimum 18 gauge
b. Fan
c. Hot Water Coil: .031" copper tubing with aluminum fins suitable for use up 200 psi or 325 degrees F. Tested at 300 psig (air)
d. Horizontal louvers for lateral air diffusion
e. Motors:
1) 120/1/60, Class "B" insulated, shaded pole or permanent split capacitor
2) Thermal overload protection
3) 1/25 through 1/8 horsepower to be sleeve bearings. 1/6 through 3/4 horsepower to be ball bearings. Ball bearing motors to be permanently lubricated. Sleeve bearings motors designed to be oiled.
D. Horizontal, Steam Unit Heaters: As specified for horizontal, hot water unit heater, except designed for steam pressures up to 80 psi.
E. Gas fired: Trane gas fired propeller unit heaters with:
1. Gray-green leaked enamel finish on cabinet
2. Motor: 115/60/1 constant speed totally enclosed sleeve bearing with motor overload protection
3. Automatic safety pilot with 100% shut-on\off
4. 24 volt gas solenoid valve
5. Pressure regulator with leak limit
6. Manual gas shut-off valve and adjustable pilot valve
7. Fan control switch and high limit switch
8. Junction box for control connections. Adjustable horizontal louvers. Two point suspension. Standard controls to meet AGA requirements. 115/24 volt transformer
F. Fin Tube Radiation:
1. Hot water: Trane E3A, pedestal mount, bottom air inlet, top air outlet
a. 16 ga. steel enclosure, baked on enamel finish; submit color chart to Architect
b. Heavy duty extruded aluminum bar grille on top outlet
c. Copper tube, aluminum fin element
d. Provide end panels, inside and outside corner pieces and enclosure extensions of same material and finish as element enclosure.
2. Electric: Trane EWFB, wall mount, bottom air inlet, top air outlet
a. Model CB, 14 ga extruded aluminum enclosure with extruded aluminum bar grille top outlet. Submit color chart to Architect for approval.
b. Heating element shall be nickel chromium alloy resistance wire, enclosed by magnesium oxide, in aluminum sheath, with mechanically bonded aluminum fins.
c. Full length, automatic reset thermal overload
d. U. L. listed
e. Provide end panels, inside and outside corner pieces and enclosure extensions of same material and finish as element enclosure.
PART 3 - EXECUTION
3.01 INSTALLATION
A. Install equipment in accordance with manufacturer's instructions in locations scheduled on drawings.
B. Coordinate electrical connections.
C. Provide access covers as required for access to piping.
3.02 START-UP, TEST, DEMONSTRATION
A. Start-up and test equipment for proper operation.
B. Demonstrate operation of equipment to maintenance personnel.
END OF SECTION
UNIT HEATERS
23 82 39 - Page 2