Roberts-Gordon CTHN-175 - Manual

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 2 SECTION 2: INSTALLER RESPONSIBILITY The installer is responsible for the following: • To install the heater, as well as the gas and electrical supplies, in accordance with applicable specifications and codes. Roberts-Gordon recommends th...

SECTION 3: C RITICAL C ONSIDERATIONS 3 SECTION 3: CRITICAL CONSIDERATIONS 3.1 Required Clearances to Combustibles Clearances are the required distances that combustible objects must be away from the heater to prevent fire hazards. Combustible materials that may catch fire include common items such a...

SECTION 3: C RITICAL C ONSIDERATIONS 5 NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows. 2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the burner and burner tube connect. FIGURE 5: U-TUBE, STANDARD REFLECTOR (inches) ...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 6 NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows. 2. Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the burner and burner tube connect. *When installed in the...

SECTION 4: N ATIONAL S TANDARDS AND A PPLICABLE C ODES 7 SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES 4.1 Gas Codes The type of gas appearing on the nameplate must be the type of gas used. Installation must comply with national and local codes and requirements of the local gas company. United ...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 8 SECTION 5: HEATER DESCRIPTIONS 5.1 Unitary vs. Multiburner CTHN-Series burners may be used for unitary heaters or for multiburner systems. Unitary heaters consist of a single burner, a single run of radiant tubing and a single fan assemb...

SECTION 6: M AJOR C OMPONENTS 9 SECTION 6: MAJOR COMPONENTS FIGURE 11: Major Component Descriptions Tube and Reflector Hanger with Clamp Package Position this hanger no more than 4'' (10 cm) away from the burner assembly. Coupling Assembly with Lock Reflector End Cap Punch out center section to acco...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 10 SECTION 7: GENERAL SUSPENSION DETAILS To ensure your safety and comply with the terms of the warranty, all units must be installed in accordance with these instructions. The gas or the electrical supply lines must not be used to support...

SECTION 8: U NITARY L INEAR & U-T UBE H EATER I NSTALLATION 11 SECTION 8: UNITARY LINEAR & U-TUBE HEATER INSTALLATION 8.1 Standard Parts *Canadian Models: Rubber (Type 1) Gas Hoses available as an accessory. See Page 69, Section 16 . Table 1: Contents of CTHN Burner Carton Part No. Descripti...

SECTION 8: U NITARY L INEAR & U-T UBE H EATER I NSTALLATION 13 8.2 Unitary Heater Requirements CTHN unitary heaters are typically shipped as a burner package, fan assembly and a tube and accessory package. The tube and accessory packages contain enough tube, reflector and hanging parts for one u...

SECTION 8: U NITARY L INEAR & U-T UBE H EATER I NSTALLATION 15 FIGURE 14: Unitary Linear Layout Overviews Fan Assembly Burner Reflector Tube Tube/Reflector Hanger Coupling Assembly LEGEND a = 14" (36 cm) reflector width (not shown) b = 2" (5 cm) end cap to burner/fan c = 2" (5 cm) en...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 18 FIGURE 17: Unitary U-tube Layout Overviews c b d f c b d e c b d e f c b d e e c b d e e f LEGEND a = 14" (36 cm) reflector width (not shown) b = 2" (5 cm) end cap to burner c = 2" (5 cm) end cap to hanger d = 7'6" (229 ...

SECTION 8: U NITARY L INEAR & U-T UBE H EATER I NSTALLATION 19 Step 8.5 Burner Tube Installation Step 8.6 Tube Clamp Package Installation 7' 6" ± 1' (229 cm ± 25 cm) NOTE: Tubing requires a downward slope of 1/2" (1.3 cm) per 20' (6 m) away from burner. S-hook Burner Tube Hanger Offset m...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 20 Step 8.7 Coupling and Tube Assembly Step 8.7.1 Coupling and Tube Assembly (Continued) Tube Tube Orient coupling so that the impact block is in the 2:00 or 10:00 o’clock positions. Closed Open Tab 3" (8 cm) to 4" (10 cm) Slide Ba...

SECTION 8: U NITARY L INEAR & U-T UBE H EATER I NSTALLATION 21 Step 8.7.2 Coupling and Tube Assembly (Continued) Step 8.8 Turbulator Installation 2.3 m .25 m 3 m .25 m Model Radiant Tube Length CTHN-40 10' (4.5 m) CTHN-60 20' (6 m) CTHN-80 20' (6 m) CTHN-100 30' (9 m) CTHN-125 40' (12 m) CTHN-15...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 22 Step 8.9 Reflector Installation H an g e r Bu r ne r Tube Re fl e c t or Description Part Number Tube/Reflector Hanger 03090100 Burner Tube 03051XXX Reflector 02750303 NOTE: All radiant tube surfaces must be covered by a reflector, exce...

SECTION 8: U NITARY L INEAR & U-T UBE H EATER I NSTALLATION 23 Step 8.9.1 Reflector, U-clip and Reflector Support Installation The pictorial drawings of the heater construction in Section 8 are schematic only and provide a general guideline of where hangers, reflector supports and u-clips are to...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 24 Step 8.10 Burner Installation Step 8.11 Fan Inlet Plate and Warning Tag Lock Washer Gasket Burner Bolt (Torque 120 in/lb 13.56 Nm) S-hook Burner Tube Burner must be installed with the flame observation window facing down. Description Pa...

SECTION 8: U NITARY L INEAR & U-T UBE H EATER I NSTALLATION 25 Step 8.12 Restrictor Plate Installation Step 8.13 Fan Installation Attach restrictor plate (see chart below right) to fan inlet and replace inlet collar. Description Part Number Restrictor Plate 07730XXX Model Fan Assy. P/N Restricto...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 26 SECTION 9: MULTIBURNER HEATER INSTALLATION 9.1 Standard Parts *Canadian Models: Rubber (Type 1) Gas Hoses available as an accessory. See Page 69, Section 16 . Table 6: Contents of CTHN Burner Carton Part No. Description CTHN-40 CTHN-60 ...

SECTION 9: M ULTIBURNER H EATER I NSTALLATION 27 Table 8: Component Package Guide Additional tubing length may be added to heater. Any additional tubing lengths are considered as manifold tube length for length determination, See Page 29, Section 9.2 through Page 31, Section 9.6 , design requirement...

SECTION 9: M ULTIBURNER H EATER I NSTALLATION 29 9.2 Multiburner System Design Requirements A CTHN multiburner system has a number of radiant tube sections interconnected by manifold tube to a pump to form a complete system. Reflectors can be used over the manifold tube but are not required.The syst...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 30 Table 10: Multiburner Design Requirements * U-tube = 2 elbows 9.3 Burners Per Pump 1. The maximum number of burners per pump is shown in Table 11 . 2. When combining different burner inputs in a system, the number of burners per pump (0...

SECTION 9: M ULTIBURNER H EATER I NSTALLATION 31 9.4 Radiant Tube Length The radiant tube length fixed for each burner is shown on Page 30, Table 10 . 9.5 Manifold Tube Any tube beyond the radiant tube length is considered manifold. Manifold tube can be used to lengthen tube runs beyond the radiant ...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 32 FIGURE 19: Flag Layout FIGURE 20: Modified In-Series Layout Last Tee Manifold tube between joining tee and pump. Manifold tube between radiant tube ends. Burner furthest from pump does not need a damper coupling. First Tee Burner Pump M...

SECTION 9: M ULTIBURNER H EATER I NSTALLATION 33 9.6.2 T and Fork Layouts and Manifold Tube Length Rules See Page 33, Figure 21 through Page 34, Figure 22 for diagrams of T and Fork layouts. The T and Fork layouts have a tee or cross (called the "last tee" or "last cross") where the ...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 34 FIGURE 22: Fork Layout Pump Manifold tube between joining cross and pump. Last Cross Manifold tube between radiant tube ends. Damper Couplings located at the end of the rows. Burner Radiant Tube Tee (2) Multiple rows of burners:Manifold...

SECTION 9: M ULTIBURNER H EATER I NSTALLATION 35 9.6.3 Herringbone Layout and Manifold Tube Length Rules The herringbone layout is essentially several T layouts stacked together. Therefore, the same principle for manifold tube calculation as used for T layouts is used for herringbone layouts, with o...

SECTION 9: M ULTIBURNER H EATER I NSTALLATION 37 Step 9.9 Coupling and Tube Assembly Step 9.9.1 Coupling and Tube Assembly (Continued) Tube Tube Orient coupling so that the impact block is in the 2:00 or 10:00 o’clock positions. Closed Open Tab 3" (8 cm) to 4" (10 cm) Slide Bar/Coupling Lock...

CTHN-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL 38 Step 9.9.2 Coupling and Tube Assembly (Continued) Step 9.10 Turbulator Installation 2.3 m .25 m 3 m .25 m Model Radiant Tube Length CTHN-40 10' (4.5 m) CTHN-60 20' (6 m) CTHN-80 20' (6 m) CTHN-100 30' (9 m) CTHN-125 40' (12 m) CTHN-150 ...

SECTION 9: M ULTIBURNER H EATER I NSTALLATION 39 Step 9.11 Reflector Installation H an g e r Bu r ne r Tube Re fl e c t or Description Part Number Tube/Reflector Hanger 03090100 Burner Tube 03051XXX Reflector 02750303 NOTE: All radiant tube surfaces must be covered by a reflector, except for a u-tub...

SECTION 9: M ULTIBURNER H EATER I NSTALLATION 41 Step 9.12 Burner Installation Lock Washer Gasket Burner Bolt (Torque 120 in/lb 13.56 Nm) S-hook Burner Tube Burner must be installed with the flame observation window facing down. Description Part Number Bolt 94273914 Burner 052XXXXX Lock Washer 96411...