*! ANIN: This heater must be installed and serviced by trained gas installation and service personnel only! Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. ead the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment. Protect yourself and others by observing all safety information. etain instructions for future reference. LD Series * For complete installation instructions, see eneral IOM this piece was inserted within. Also available at www.reverberray.com. Project: Date: Location: City: State: Zip: Customer Name: Local epresentative: Contractor: Engineer: Address: City: State: Zip: Phone #: Serial #: Date of Installation: Notes: Table of Contents Page Models 1 arnings 2 Clearances to Combustibles 2 Product Summary 3 Mechanical Instructions 3 Heater equirements 4 Theory of Operation 4 iring Diagrams 5-7 Flowchart 8-9 Parts Listing 10-11 Series Kit Contents 12 Commercial Models (Approved for commercial use) Qty. Model # as Type (circle one) MBTU's Length U-Tube Length eight Min. Mtg. Height Combustion Chamber adiant Emitter Tube "Type" Tube Pkg #1 "Type" Tube Pkg. #2 Baffle Pieces LD 10-40 N or LP 40 / 28 12'-3" N/A 70# 10 ft. Titanium Coated N/A 10-3 Titanium N/A 3 LD 15-40 N or LP 40 / 28 17'-0" N/A 85# 8 ft. Titanium Coated Aluminized 15-3 Titanium N/A 3 LD 15-50 N or LP 50 / 35 17'-0" N/A 85# 10 ft. Titanium Coated Aluminized 15-3 Titanium N/A 3 LD 20-40 N or LP 40 / 28 22'-0" 13'-0" 100# 8 ft. Titanium Coated Aluminized 20-3 Titanium N/A 3 LD 20-50 N or LP 50 / 35 22'-0" 13'-0" 100# 9 ft. Titanium Coated Aluminized 20-3 Titanium N/A 3 LD 30-50 N or LP 50 / 35 31'-3" *17'-8" 120# 9 ft. Titanium Coated Aluminized 30-3 Titanium N/A 3 esidential Models (Approved for both commercial and residential use) Qty. Model # as Type (circle one) MBTU's Length U-Tube Length eight Min. Mtg. Height Combustion Chamber adiant Emitter Tube "Type" Tube Pkg #1 "Type" Tube Pkg. #2 Baffle Pieces LD 15-40 N or LP 40 / 28 17'-0" N/A 85# 8 ft. Titanium Coated Aluminized 15-3 Titanium N/A 3 LD 20-40 N or LP 40 / 28 22'-0" 13'-0" 100# 8 ft. Titanium Coated Aluminized 20-3 Titanium N/A 3 LD 30-50 N or LP 50 / 35 31'-3" *17'-8" 120# 9 ft. Titanium Coated Aluminized 30-3 Titanium N/A 3 * Model requires 5EA-Sub accessory package. arranty registration options: 1. egister online at www.reverberray.com/warranty. 2. Fill out this page and fax to Detroit adiant Products Co. 3. Fill out this page and mail a copy to Detroit adiant Products Co. Printed in U.S.A. 2004 Detroit adiant Products 21400 Hoover d., arren, MI 48089 T. (586) 756-0950 F. (586) 756-2626 Form# LIOLD-1.5M-4/04 (M) eplaces Form# LIOLD-2M-10/02
LD Series arnings & Clearances to Combustibles! ANIN! T FO ESIDENTIAL USE! Do not use in the home, sleeping quarters, attached garages, etc.! ANIN! This heater must be installed and serviced by trained gas installation and service personnel only. ead and understand these instructions thoroughly before attempting to install, operate or service this heater. Failure to comply could result in personal injury, asphyxiation, death, fire, and/or property damage. etain these instructions for future reference.! ANIN! This is not an explosion-proof heater. here there is the possibility of exposure to flammable vapors, consult the local fire marshal, the fire insurance carrier and other authorities for approval of the proposed installation. LD CLEAANCES TO COMBUSTIES (IN.)* MODEL. MOUNTIN SIDE ANLE FONT BEHIND TOP BELO LD (10,15,20) - 40 0º 15 15 6 45 45º 58 8 10 45 /1 side shield 0º 42 8 6 45 /2 side shields 0º 20 20 6 45 20 ft from burner 0º NA NA NA NA LD 15-50 0º 11 11 6 48 45º 39 8 10 48 /1 side shield 0º 29 8 6 48 /2 side shields 0º 16 16 6 48 20 ft from burner 0º NA NA NA NA LD (20,30) - 50 0º 11 11 6 48 45º 39 8 10 48 /1 side shield 0º 29 8 6 48 /2 side shields 0º 16 16 6 48 20 ft from burner 0º 7 7 6 30 *See chart on page one for models certified for residential use. SIDE TOP SIDE FONT TOP BEHIND! ANIN! In locations used for the storage of combustible materials, signs must be posted to specify the maximum permissible stacking height to maintain the required clearances from the heater to the combustibles. Signs must either be posted adjacent to the heater thermostats or in the absence of such thermostats in a conspicuous location. BELO 0 MOUNTIN ANLE TOP FONT BEHIND BELO 0 /1 SIDE SHIELD TOP SIDE SIDE! ANIN! Failure to comply with the stated clearances to combustibles could result in personal injury, death and/or property damage. BELO 45 MOUNTIN ANLE BELO 0 /2 SIDE SHIELDS! ANIN! This heater should be installed so that the minimum clearances to vehicles, as marked on the heater, will be maintained. If vehicle lifts are present, ensure that these clearances will be maintained from the highest raised vehicle. 2
LD Series Mechanical Instructions This supplement is designed to address the specifics of the LD Series - See page 12 for specific product features. Specific Mechanical Instructions Be sure to identify the titanium combustion chamber and place as the first tube section. Do not use the aluminized steel radiant tubing as the first tube (combustion chamber). For residential installations it is required that the appliance is vented. Venting must be 3 in. diameter (4 in. diameter for common venting). efer to the flue venting guidelines on page 19 of the eneral Manual. If the heater is mounted below 8 feet, it is required that Protective uards (part # P) are installed on heater (see illustration at right). Operational Features adiant Tube Protective uard (part # P) eflector LD Series heaters require a 24 Volt, two-stage thermostat to operate. Each heater has a round terminal strip (or yellow cord) that accepts three 1/4 in. insulated spade terminals for the thermostat wiring. Do not install 120V to the 24V connection. 120V connection is factory wired with a three prong pig tail. There are two versions of the LD Series. The standard version comes without a relay board (HLB) and the other is supplied with an internal relay board (HLB) factory installed. A LD Series unit without a relay board (HLB) supplies it s own control voltage and is identified by a round white band located around the spade terminal. If two or more LD models are to be controlled by a single thermostat, they must be factory assembled with optional relay boards (HLB) and installed using an external transformer (field supplied) as shown on page 6. A LD Series unit with a relay board (HLB) installed is identified by a round orange band around the spade terminal. On stainless steel heaters, units with a relay board (HLB) will be labeled accordingly. All models assembled with a relay board (HLB) reference the suffix D on the CSA rating plate. LD BAFFLE INSTUCTIONS ITH TUBULATO FINS Insert assembled baffles with HEAT Baffle preceeding the PESSUE Baffles (fig. 1). Allow for turbulator fins so that the key hole is inserted first. All baffles must be placed vertically in the last radiant tube/heat exchanger (fig.2). 1st Figure 1 HEAT BAFFLE If the heater is installed with a U or Elbow fitting all baffle must still remain. There may be some instances where the baffle will be cut into two sections. Place as much baffle as possible downstream of the U or Elbow and the remainder of the baffle just before the U or Elbow fitting. 2nd 3rd Key Hole PESSUE BAFFLE 3' BUNE BOX TOP VIE Figure 2 IMPOTANT: TE FIN DIECTION & BAFFLE ASSEMY LAST ADIANT TUBE Key Hole HEAT BAFFLE 1st 100º 80º Turbulator fins PESSUE BAFFLES 2nd, 3rd SIDE VIE END VIE COSS SECTION ITH BAFFLE 3
LD Series Electrical equirements 120 Volt - 60 HZ Starting Current 4.8 Amps unning Current 1.1 Amps as equirements Manifold Pressure Nat. 3.5 LP. 10.0 Minimum Inlet Pressure Nat. 5.0 LP. 11.0 Maximum Inlet Nat. 14.0 LP. 14.0 Ventilation equirements esidential models must be vented. Consult the general manual for venting instructions and unvented operation. For unvented operation (commercial use only), there must be a positive air displacement of at least 4.0 CFM per 1000 BTU/H for natural gas or 4.5 CFM per 1000 BTU/H for LP gas. VE-4 termination cap must also be used. Maximum vent length for all models is 20 ft. Approved & equired Vent Caps Sidewall Single 3 Duravent sidewall vent kit (3-DSK). 3 Vent terminal (SD-3). Sidewall Dual (Sharing common t-stat) 4 Duravent sidewall vent kit (4-DSK). 4 Vent terminal (SD-4). oof Single Approved 3 rooftop raincap (TVP-3). Theory of Operation Standby: The Micro 60U24 control continually checks for internal faults, safety circuit integrity, and relay contact positioning. Starting Circuit: Upon a call for heat, the control will verify that the burner and exhaust safety pressure switches are in their proper position. The fan relay energizes the fan, an operational static pressure is achieved and the normally open burner pressure switch will close, initiating the ignition sequence. The glow-bar is powered and after 45 seconds the main gas valve opens. If flame is not established the heater will attempt to re-ignite for a total of three trials for ignition and then proceed to lockout. unning Circuit: After ignition the flame-rod monitors the main burner flame. If flame is lost, the control acts to close the gas valve within one second and begin a new trial for ignition sequence, identical to the start up sequence, is initiated. If proof is not established within 8.5 seconds, the unit will retry 2 additional ignition sequences and then proceed to hard lock-out. The control can be reset by interrupting the power source or at LED CODE FAULT STATUS FAULT CODE DELAY Initial flash on power up, then steady off Normal operation Immediate Steady on Module failure / Internal fault Immediate 1 flash Ignition failure 30-32 minutes 2 flashes APS 1 failure 10-12 minutes 3 flashes ASP 2 failure 20-22 minutes 4 flashes Solenoid valve fault / Leaky valve / Flame amplifier fault Immediate No flash on 117V start up Transformer fault Immediate Note: Hard lockout LED code will appear upon completion of the soft lockout sequence of operation. oof Dual (Sharing common t-stat) Approved 4 rooftop raincap (TVP-4). Important: Do not use sidewall caps for roof venting and do not use roof caps for sidewall venting. 4
Internal iring Diagrams MICO 60U-24 LADDE DIAAM MICO 60U-24 ITH THEMO SITCH L1 120VAC L2 TANSFOME 120V 24V T'STAT TEMINAL O PESSUE SITCHES APS2 APS1 P Y THEMO SITCH P INITO OE FLAME OD 1 2 STAE 2-STAE T'STAT INDICATO LIHTS Y ND POBE ND TH 24V ND VALVE APS2 APS1 APS1 APS2 117N 117N HSI HSI FAN 117L MICO 60U-24 INITION MODULE AS VALVE STATUS LIHT MICO 60U-24 OCK DIAAM 24V 1 2 STAE 2-STAE T'STAT T'STAT TEMINAL MICO 60U-24 INITION MODULE O P THEMO SITCH P APS1 () PESSUE SITCHES APS2 (NC) STATUS LIHT Y TANSFOME Y FLAME OD HI P M INDICATO LIHTS L1 120VAC INITO C L2 OE AS VALVE P M HI C OFF 5
LD Series Field iring Diagrams hite label 24V 1 2 LO HI 1/4 spade terminals required - field supplied 24v N Low High round Screw on Burner Box T-stat Additional wire needed on thermostat models that require constant power. LD HEATE BUNE BOX Note: If optional yellow control cord is installed then the following wire colors apply: 24v - reen Low - hite High - Black Single heater, single thermostat, no relay board (white label). 1/4 spade terminals required - field supplied Orange label N 1 2 24v N Low High T-stat - 24V + Orange label N LO HI 1 2 LO HI LD HEATE BUNE BOX LD HEATE BUNE BOX Note: If optional yellow control cord is installed then the following wire colors apply: Neutral - reen Low - hite High - Black Additional wire needed on thermostat models that require constant power. EXTENAL TANSFOME -FIELD SUPPLIED 120 V Orange label N 1 2 LO HI LD HEATE BUNE BOX L1 L2 Multiple heaters, single thermostat, with HLB (relay board - orange label). 6
Alternative Internal iring Diagrams Used when two infra-red units are controlled via a single control MICO 60U-24 ITH HLB ELAY BOAD & THEMO SITCH MICO 60U-24 LADDE DIAAM - ITH ELAY BOAD L1 120VAC L2 O Y HL ELAY BOAD T'STAT TEMINAL PESSUE SITCHES APS1 O TANSFOME APS2 P 120V 24V Y THEMO SITCH P INITO OE FLAME OD 120V 1 2 STAE 2-STAE T'STAT INDICATO LIHTS Y ND POBE ND TH 24V ND VALVE APS2 APS1 APS1 APS2 117N 117N HSI HSI FAN 117L MICO 60U-24 INITION MODULE 24V 120/24V TANSFOME AS VALVE STATUS LIHT MICO 60U-24 OCK DIAAM - ITH ELAY BOAD Y O 24V 1 2 STAE 2-STAE T'STAT T'STAT TEMINAL MICO 60U-24 INITION MODULE HL ELAY BOAD O P THEMO SITCH P APS1 () PESSUE SITCHES APS2 (NC) STATUS LIHT 120/24V TANSFOME Y TANSFOME Y FLAME OD P M HI C INDICATO LIHTS L1 120VAC INITO L2 OE AS VALVE P M HI C OFF 7
LD Troubleshooting Flow Chart Turn up thermostat LD Series - 3 Tube Heater Installation, Operation, Maintenance and Parts Manual Does the heater have a relay board? See page 6 of LD insert for details on emove obstruction. Is the fan obstructed? Is the circuit board sending 120V to the fan? Is the power across the left terminal (on the TP- 213-24V plug) and ground (a screw on the burner box) 24V? how to determine if heater has a relay board. Is there 24V across the TH and ground terminals on the circuit board? The fan is faulty and must be replaced. eplace bad circuit board. Is there 120V on the primary side of the transformer? Is the power at the heater 120V? Is there 24V on secondary side of transformer? Does the fan blower turn on? Is the power across the middle (low) terminal (on the TP- 213-24V plug) and ground (a screw on the burner box) 24V? Circuit board is faulty and must be replaced. Transformer is faulty and must be replaced. Find the source of the electrical problem between panel & heater. Correct wiring. Is the power across the left and center terminal on the TP-213-24V plug 24V? Thermostat or wiring from thermostat to heater is faulty and must be replaced. epair the wiring between the transformer and the TP-213-24V plug. Is the circuit board sending 120V to the fan? Is the power across the TH terminal on the circuit board and ground on the circuit board 24V? Is there 120V on the primary side of the external transformer? Find the source of the electrical problem between panel & external transformer. Is the power across the 24V terminal on the circuit board and ground on the circuit board 24V? 8 Shaded boxes indicate troubleshooting for heaters with elay Boards (HLB) installed. The circuit board is faulty and must be replaced. The relay board is faulty and must be replaced. Is there 24V on the secondary side of the external transformer? External transformer is faulty and must be replaced. The internal transformer is faulty and must be replaced. Is there 120V on the primary side of the internal transformer? eplace ignitor. Is the ignitor physically damaged? Does the ignitor warm up and glow red? The circuit board is faulty and must be replaced. Is there 24V to the thermostat? Is the fan obstructed? Is the resistance through then ignitor 45-400 ohms? * The fan is faulty and must be replaced. The thermostat or wiring is faulty and should be replaced or repaired. Find source of electrical problem between transformer and thermostat. Check voltage at ignitor during the ignition sequence (usually 30-45 seconds after power to heater). Is it 120V? emove obstruction. Check for loose wiring or restrictions in hose connections to the pressure switch. Are they ok? epair wiring or hose connections. Is the inlet or the outlet of the unit obstructed? I.e. ice, birds nest, dirt, etc.
eplace the appropriate pressure switch(es) after verifying the following: After 30 minutes of non-operation has passed, is there a flash code for ASP-1 or ASP-2 failure (2 or 3 flashes)? * There is continuity across the thermal fuse. * Baffle(s) is in the tube(s) farthest from the burner. * Heater, fan blower, squirrel cage, intake and exhaust are clean and free from dirt and obstructions. * The 4 air intake pipe does not exceed 20 feet and/or 2 elbows. * There is not a negative pressure experienced at the area of air intake (i.e. attic space, high-winds, very tight building). emove obstruction. eplace circuit board. Possibly, the circuit board and/or wiring harness is faulty. These should be replaced. Test for 24V at valve during valve opening period (usually 30-45 seconds after power to the heater). Is there 24V to valve for 8 seconds? After ignitor is warmed up, does gas valve open? If heater does not go into high-fire mode, check the following. Correct problem. Measure the voltage across the red wire on the relay board and ND on the circuit board. Is there 24V? On the outside of the heater, check for 24V across COM and HIH on the TP-213-24V plug. Is there 24V? eplace gas valve. Check to make sure gas pressure is within minimum and maximum inputs, as indicated on AA burner rating label. Is gas pressure OK? The valve is faulty and must be replaced. epair or replace faulty wiring or thermostat. Check to make sure gas pressure is within minimum and maximum inputs, as indicated on AA burner rating label. Is gas pressure OK? Is the gas cock in the ON position? Does the burner light? 9 The relay board is faulty and must be replaced. TE: To confirm the heater is not in high-fire mode, check the manifold pressure. If 3.5 natural or 10 propane, the light is faulty and should be replaced. If approximately 2.0 to 2.5 natural or 5.0 to 6.5 propane, the heater is in low-fire mode and the troubleshooting steps described here should be followed. Correct problem. Make sure gas lines were purged of air. ith microammeter, check DC voltage at flame rod. Is it greater than 0.7 microamps? Is the heater properly grounded? Is the heater s polarity correct? Does the burner stay on for approx. 8 seconds and then shut off? Does the burner stay on? * ANIN: Bypassing any switch is for testing purposes only. Do not leave switch bypassed during normal operation or heater s built-in safety mechanisms will be compromised. Check to make sure flame sensor wire is OK and then replace circuit board. Sensing rod is faulty or flame is weak. Check to make sure heater is operating at proper gas pressure as indicated on AA burner rating label and then replace sensing rod if needed. Correct problem. Does heater stay on until call for heat ends? Does the burner come on and then turn off immediately (1 or 2 seconds). Correct problem. * * See page 4 for fault flash code signals. Exhaust pressure switch may be faulty or there is a restriction in the exhaust. Check to make sure that the gas pressure is within minimum and maximum inputs as indicated on the AA burner rating label. Is gas pressure OK? The following can cause the heater to shut down: * Improper grounding * High winds * Taking combustion air from the attic * Dirty environment * Baffle improperly positioned * Fluctuating gas pressure Troubleshooting ends.
112 1078 1077 1081 1086 1082 1083 LD Series - 3 Tube Heater Installation, Operation, Maintenance and Parts Manual LD Series Parts Breakdown Combustion Tube Emitter Tube 828 70 825 333 827 832 106 1079 1064B 1 264F 831 830 57A 1101 56C 1060F 1102 851 55A 218 5 852 1080 17 1104 68A 826 31B 217 122 205 50 44 9 1033 31B 334 83 1103 33B 204 1070 223 840 208 212 76 841 10 105 20C 222 222A 12 221 11 10
Basic Parts List LD SEIES PATS LISTIN TP# ITEM TP# ITEM TP-1 CONTOL BOX COVE TP-223 AS MANIFOLD TP-5 FLANE ASKET TP-264F N.O. BUNE PESS. SITCH IS22035051F5132 (40 MBH) TP-9 CONDUIT COUPLIN TP-333 3' ACK 120V PLU TP-10 CONDUIT 4" X 1/2" TP-334 YELLO 24V CONTOL IE TP-11 LO-BA INITO BOX TP-825 HLB ELAY BOAD TP-12 LO-BA INITO BOX COVE TP-826 40VA TANSFOME TP-17 SIHT LASS KIT TP-827 ED LED DISPLY DIASTIC LIHT TP-20C 120" ALUMINUM EFLECTO TP-828 YELLO OPEATIONAL IND. LIHT TP-31B CONTOL BOX BACKET TP-830 DIVIDE OMMET TP-33B 1/2" AS COCK TP-831 EEN SELF TAP OUND SCE TP-44 AI OIFICE /SCEEN - CONSULT FACTOY TP-832 THEMOSTAT TEMINAL STIP TP-50 LO-BA INITO TP-840 36E96-224 TO STAE AS VALVE - NAT TP-55A FAN OE (40, 50 MBTU/H) TP-841 36E96-226 TO STAE AS VALVE - LP TP-56C 1/4" ATMOSPHEIC TUBE (VINYL) TP-851 MICO-60-24 DIASTIC CICUIT BOAD TP-57A 1/4" PESSUE TUBE TP-852 IE HANESS SET (3PCS.) FO MICO 60 BOAD TP-68A STAIN ELIEF BUSHIN TP-1033 THEMAL FUSE TP-70 CONTOL BOX COVE ASKET (PE FOOT**) TP-1060F N.C. EXHT PESS. SITCH IS22113062F5128 (40, 50 MBH) TP-76 UBBE OMMET TP-1064B N.O. BUNE PESS. SITCH IS22052051F5174 (50 MBH) TP-83 STAINLESS STEEL FLEX CONNECTO TP-1070 BUNE (40 TO 50 MBTU/H) TP-105 EFLECTO END CAP TP-1078 EFLECTO CENTE SUPPOT TP-106 EFLECTO CLIP TP-1077 TUBE CLAMP TP-112 5' EFLECTO TP-1079 IE HANE / SPIN CLIP TP-122 ASKET FO AI OIFICE & AI COLLA TP-1080 16'' BUNE TUBE ITH FLANE - 3" SPECIAL TP-204 AS OIFICE - CONSULT FACTOY TP-1081 10 FT.- 3" TITANIUM COMBUSTION TUBE TP-205 LO-BA HOLDE TP-1082 10 FT.- 3" COATED ALUMINIZED ADIANT TUBE TP-208 "Z" MOUNTIN BACKET TP-1083 3" S.S. INTELOCKIN 33" PESSUE BAFFLE / TABS TP-212 1/2" X 3" PIPE NIPPLE TP-1086 3" S.S. INTELOCKIN 33" HEAT BAFFLE SECTION TP-217 PESSUE BAB FITTIN TP-1101 DIVIDE PANEL / P.S. MOUNTIN TABS TP-218 EXHAUST PESSUE TUBE (VINYL) TP-1102 LEFT END PANEL / LIHT HOLES TP-221 LO-BA HOLDE ASKET TP-1103 IHT END PANELS - HOLES TP-222 FLAME OD TP-1104 CONTOL BOX TP-222A FLAME OD IE ** 6 TOTAL NEEDED TO COVE OUTE EDES OF A BUNE BOX (TP-70). 11
KIT CONTENTS AND PODUCT FEATUES Kit contents for the LD Series are shown below. eference the proper column for your particular models length. FILLED BY: LD SEIES KIT CONTENTS TP# DESCIPTION 10 FOOT 15 FOOT 20 FOOT 30 FOOT TP-1077 3" TUBE CLAMPS 1 2 2 3 TP-1079 3" HANES 2 3 3 4 TP-1078 3" EFL. CNT. SPT. 1 1 2 3 TP-105 EFL. ENDCAPS 2 2 2 2 TP-106 EFL. ENDCAP CLIPS 8 8 8 8 TP-33B 1/2" AS COCK 1 1 1 1 TP-83 24" SS FLEX LINE 1 1 1 1 IOM INSTALL / OP MANUAL 1 1 1 1 3 eflector Center Support TP-1078 24 SS Flex Connect TP-83 3 Hanger TP-1079 3 Butt Clamp TP-1077 1/2 as Cock TP-33B eflector End Caps TP- 105 Bag of eflector endcap clips TP-106 eneral IOM (LIOT) AND LD Series Insert (LIOLD) Product Features APPOVALS IAS, CA, CSA, Certain models are residentially certified to CSA No. 7-89. Outdoor Approval with OD-KIT. BUNE SIHT LASS For burner inspection. COMBUSTION AI INLET & VENT 4 Air inlet duct. 3 Vent duct. ENAMELED CONTOL BOX Outside air collar (4 ) attached. Totally enclosed components. AS CONNECTION 1/2 gas cock attached. 24 x 1/2 flex connector provided. CONTOLS 100% safety shut off. Dual differential pressure switches. Silicon carbide hot surface igniter. Flame rod sensing. Pre and post purge controls. EMMITE & COMBUSTION TUBES 16ga. 3 O.D. titanium coated combustion chamber. 16ga. 3 O.D. aluminized steel radiant tubes. OPTIONAL FEATUES HLB required when placing two or more heaters on a single control. Provide 24VAC from field. ADIANT SUFACE AEA (SQ. FT.) 10 models - 7.6 20 models - 15.2 30 models - 22.8 AANTY* 1 year - Burner box components. 3 years-combustion and radiant tubes. 5 years-stainless steel burner. *See cover for warranty registration information. OTHE One reflector center support per reflector. Stainless steel turbulator baffle included. Stainless steel upgrades (burner box and reflectors only) are available. Silicone sealed control box available. Made in U.S.A. Visit www.reverberray.com for additional information. 12