combustion air intake and vent ■ Direct spark ignition system with step opening gas valve and 100% Gas Shut-Off Safety Control (pre-purge) ■ Monitoring lights for visual diagnosis of maintenance needs OTHER ■ Lower mounting height kit required on heater installations between 6 and 8 feet ■ Optional deflector kit for reduced clearances to combustible materials ■ Optional decorative grille kit for drop ceiling applications TECHNICAL SPECIFICATIONS CB20 20,000 CB40 40,000 CB30 30,000

Gas leak. See Warning statement at 1. Locate and correct all leaks (see Check- position top of page ing Gas Connections, page 12) 2. Control valve defective 2. Replace control valve Gas odor during combustion 1. Foreign matter between control valve 1. Take apart gas tubing and remove for- and burner eign matter 2. Gas leak. See Warning statement at 2. Locate and correct all leaks (see Check- top of page ing Gas Connections, page 12) 18 OWNER’S MANUAL These Parts Centrals are privately owned busi

IMPORTANT:Vent-free heaters add moisture to the air. Although this is beneficial, installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture. See Air for Combustion and Ventilation, pages 5 through 7. CAUTION: If you install the heater in a home garage • heater pilot and burner must be at least 18 inches above floor. • locate heater where moving vehicle will not hit it. For convenience and efficiency, install heater • where there is easy access for

Follow procedures described earlier for all other adjustments. Step 5 "@ ! 7 . 13.0) GAS CONNECTIONS AND REGULATIONS / ; . ; . BB / D . B . . . IMPORTANT BEFORE CONNECTING THE GAS TO THE HEATER 1. Connect to the supply tank or manifold in accordance with the latest edition of National Fuel Gas Code (ANSI Z223.1), and local building codes. Authorities having jurisdiction should be consulted before the installation is made. (In Canada, refer to the la

Slide the reflectors on the tube support/hanger brackets and through the wire hangers. 2. The tube at the coupling joints must be covered. Slide the reflectors together and provide an overlap of two (2”) inches for the first reflector overlap after the control unit. All remaining reflector overlaps will be approximately one (1”) inch. This will allow for the natural expansion and contraction of the heater when in operation. Note: The heaters can expand and contract up to 1-3/4” of an inch. 3. Se

See the following drawings for typical examples. 1. Use only noncombustible materials for hangers and brackets. 2. A minimum No. 2 chain with a working load limit of 115 lbs. is required. 3. Turnbuckles can be used with chains to allow leveling of the heater. All “S” hooks and eye bolts must be manually crimped closed by the installer. 4. When using rigid means for heater suspension (rod, flat bar, etc.) provide sufficient lengths or swing joints to compensate for expansion. See Figures b and c.

System 70Ft. System PTS Body Packages – Alumi-Therm/Aluminized 40 Ft. Pkg 44137090 20 Ft. Pkg 44135030 Part # Each Body Package Includes: Qty. Qty. 42912169 10 Ft. Tube with 6 Hole Flange (Alumi-Therm) 1 - 41932100 10 Ft. Tube less Flanges (Aluminized) 3 2 43319100 Reflector, 9’ 11.” 4 2 30462980 Tube Coupling 3 1 43318000 Tube Hanger/Support Bracket, 13” 4 2 43980010 Wire Hanger 4 2 40 Ft. Pkg 44137090 30 Ft. Pkg 44136050 Qty. Qty. 1 - 3 3 4 3 3 3 4 3 4 3 Body Fastener Kit (included in body pac

Angle PTS/PTU 40/25 40,000 25,000 #44140061 #32 (0.116) #49 (0.073) 10 ft. 9 ft. 4 PTS/PTU 50/30 50,000 30,000 #44140064 3.5mm (0.138) 46 (0.081) 11 ft. 10 ft. 5 PTS/PTU 75/50 75,000 50,000 #44140063 #21 (0.159) 2.5mm (0.098) 13 ft. 12 ft. 5 PTS/PTU 100/65 100,000 65,000 #44140062 #12 (0..189)) #32 (0.116) 14 ft. 13 ft. 3 PTS/PTU 125/80 125,000 80,000 #44140066 #4 (0..209) #30 (0.129) 14 ft. 13 ft. 7 PTS/PTU 150/100 150,000 100,000 #44140067 “A” (0.234) #27 (0.144) 15 ft. 14 ft. 4 PTS/PTU 175/11

Consideration also must be given to service accessibility. The heater, when installed in aircraft hangars and public garages, must be installed in accordance with ANSI/NFPA 409-latest edition (Standard for Aircraft Hangars), ANSI/NFPA 88a-latest edition (Standard for Parking Structures), and ANSI/NFPA 88b-latest edition (Standard for Repair Garages) with the following clearances: a. At least 10 feet above the upper surfaces of wings or engine enclosures of the highest aircraft that may be housed