INSTALLATION / OPERATION / MAINTENANCE Applies to: Model VCS/VCT 120V 60Hz Gas-Fired, Tubular, Radiant, Low-Intensity Infrared Heater Model VCS/VCT (Harsh Environment ) On/Off & High/Low Burner/Control Box with 20 - 80 ft Tube/Reflector Length Part No.
Introduction. Welcome to the new range of powered Harsh Environment infrared heaters. Local regulations may vary and it is the installer’s responsibility to ensure that such regulations are satisfied.
Installation Code, CSA B149.1, and are so marked. Ensure that minimum clearances will be maintained to vehicles parked below the heater. They must be adequately fixed and designed to carry the whole weight of the heater. In the event of suitable roof steelwork being unavailable, additional steelwork should be fitted to enable vertical hangers to be used for suspending the heaters. F. These heaters are approved for installations between 0 - 2000ft (0 - 610m) for the US and 0 - 4500 ft (1370m) for Canada.
ON U TUBE VARIANTS THE HEATER SHOULD SLOPE DOWNWARDS TOWARDS THE RETURN BEND AND ON LINEAR VARIANTS SHOULD SLOPE DOWNWARDS TOWARDS BURNER BY APPROX. ½” FOR HORIZONTAL INSTALLATIONS AS SHOWN BELOW (DIAGRAMS EXAGGERATED FOR CLARITY) 1/2” 1/2” U Tube heater side view 1.3 Outlet U bend Linear heater side view Clearance to Combustibles. Minimum clearance to combustibles are shown in Table 1 below.
B 5 E E Service C1 C1 A Side unvented Side unvented Above Reflector Above Reflector Burner end. Burner end. C2 C2 Below heater Below heater B B B1 B1 Above outlet unvented Above outlet unvented unvented End unvented D1 D1 End Outlet end. Outlet end. C3 C3 A A Return end on U tube heater Return end on U tube heater D2 D2 Angled view. Angled view. 0° to 55° 0° to 55° distance Service distance Above Burner Above Burner End view. End view.
1.4 Gas Connection and Supply Figure 3. Correct orientation of Ball Valve WARNING: Before installation, check that the local distribution conditions, nature of gas and pressure, and adjustment of the appliance are compatible. Gas Flow The gas connection on the heater is ½” N.P.T internal thread. Gas Flow Injector sizes and manifold pressure for the burners are shown in the table 4. The gas supply piping and connections must be installed so that the minimum pressure stated is achieved. Figure 4.
CONNECTOR MUST BE INSTALLED IN A “U” CONFIGURATION. FOR HEATERS UPTO 150,000 BTU/H, A 24” LONG CONNECTOR OF AT LEAST ½” ID MUST BE USED. FOR HEATERS ABOVE 150,000 BTU/H, A 36” LONG CONNECTOR OF AT LEAST ¾” NOMINAL ID MUST BE USED. Table 4 Gas Supply Pressures Gas Type Natural Gas LP/Propane Gas Required Gas Pressure (in W.C) 7.0 11.0 Maximum Supply Pressure (in W.C) 14.0 14.0 Gas Supply 1.5 Connection ½” N.P.
Figure 5b. Single and Multiple Heater Installations 120V Control (VCS) G T BK GND L2 L1 (HOT) W 120V 60Hz 1 Ph Supply circuit BK 120V 110VThermostat Thermostat Burner 1 BK W Other burners G KEY: G-GREEN W-WHITE BK-BLACK other burners Burner If heaters are wired using the method shown above, a link wire must be fitted to the burner terminals as shown in the diagram opposite. R 24V AC Terminals Link C W1 Figure 5c. External Wiring Schematic (VCS) 24V AC Single Stage Thermostat (Ext.
Figure 6. Internal Burner Wiring Diagram.
Figure 7b. Internal Burner Wiring Diagram.
Runs of 12ft (3.6m) or shorter can use 4” (101mm) diameter vent. Runs over 12ft (3.6m) should use 6” (152mm) vent pipe. 1.6 Vent Requirements and Details 1.6.1 Unvented units Any portion of vent that passes through a combustible wall must be insulated, or use an approved insulating thimble. Heaters may be installed without a vent providing the governing building codes are met and consideration is properly given to possibilities of condensation on cold surfaces.
Figure 8.a Vertical Venting. CODE APPROVED VENT THROUGH ROOF cap with bird screen must be fitted at the inlet of the duct. If the duct inlet is located above the roof the underside of the inlet terminal must be at least 2ft (0.61m) above roof level and at least 10” (254mm) above any projection on the roof within 7ft (2.1m) of the inlet. Intake pipe, fittings and sealant are not furnished by the manufacturer.
1.8 Technical Details - Table 5a (VCS) No of Injectors 1 Gas Connection ½” N.P.T Electrical Supply 120 volt 1 phase 60Hz Vent size (in) 4” or 6” (101mm or 152mm) Unitary Fan Motor Details 120 volt 1 phase 60Hz Current Rating 1.2A MAX Ignition Electronic Program Start up with Spark Ignition Natural Gas LP Gas Min. Heater Length Max. Heater Length Min. Heater Length Max. Heater Length BTU/Hr BTU/Hr S ft (m) S ft (m) U ft (m) U ft (m) 60 60,000 60,000 20 (6.1) 40 (12.1) 20 (6.
Technical Details continued USA & CANADA Size Natural Gas 0- 2000 ft (0-610m) 60 80 100 125 150 170 200 Burner Orifice Plate 269954 269955 269943 269944 269945 269946 269946 Part No. Fan Type 270464 Fan Orifice Part No. Injector Part No. Pressure Switch Part No.
1.8 Technical Details - Table 5b (VCT) No of Injectors 1 Gas Connection ½” N.P.T Electrical Supply Vent size (in) 120 volt 1 phase 60Hz 4” or 6” (101mm or 152mm) Unitary Fan Motor Details 120 volt 1 phase 60Hz Current Rating Ignition 1.2A MAX Electronic Program Start up with Spark Ignition Thermostat Natural Gas MODEL 24Vac 60Hz 1.5A Max. total load LP Gas High / Low High / Low Rate BTU/Hr Rate BTU/Hr Min. Heater Length Max. Heater Length Min. Heater Length Max.
Technical Details continued USA & CANADA Size Natural Gas 0- 2000 ft (0-610m) 60 80 100 125 150 170 200 Burner Orifice Plate 269941 269942 269943 269944 269945 269946 269946 Part No. Fan Type Fan Orifice Part No. Injector Part No. Pressure Switch Part No.
Technical Details continued MODEL 60 U TUBE U20 U40 ● ● STRAIGHT TUBE U60 S20 S30 S40 ● ● ● S50 S60 80 ● ● ● 100 ● ● ● 125 ● ● ● ● 150 ● ● ● ● ● S70 170 ● ● ● ● 200 ● ● ● ● TUBE TYPE MATERIAL Calcoat™ Mild Steel MIN DISTANCE TO BEND 60 TUBE 1 REMAINDER 10 (3.1) 80 TUBE 1 REMAINDER 15 (4.6) 100 TUBE 1 REMAINDER 15 (4.6) 125 TUBE 1 REMAINDER 15 (4.6) 150 TUBE 1 REMAINDER 20 (6.1) 170 TUBE 1 & 2 REMAINDER 25 (7.
2. Assembly Instructions. PLEASE READ this section prior assembly to familiarize yourself with components and tools you require at various stages of assembly. Carefully open packaging and check the contents against parts and check list. to the the the the Please ensure that all packaging is disposed of in a safe environmentally friendly way. For your own safety we recommend the use of safety boots and leather faced gloves when handling sharp or heavy items.
the screw stop has butted up to the tube ends. Using the 9/16” Wrench to tighten the bolts. Type ‘F’ are fixed reflector brackets. 2 x SCREWS TIGHTENED TO FIX REFLECTOR Type ‘S’ are sliding reflector brackets. DO NOT OVERTIGHTEN. Moving between the four bolts, tighten each ensuring that equal pressure is applied to each set pin in turn. Complete assembly by drilling and screwing self tapping retention zip screws. LEAVE 1/8" MIN.
Each subsequent reflector must OVERLAP the previous one as shown below and to a distance as indicated by their individual assembly sheets. Corner reflector Alternate fixings of further reflectors by type S and type F reflector brackets and space as indicated by individual assembly sheets. 90° Elbow 90° Bend End Caps Reflector support bracket assemblies are fitted at each reflector joint, with the clamp screws adjusted so that reflectors are fixed together.
Bends must be fitted at a distance of at least 50% of the total heat exchanger e.g. for a 60ft long heater, the closest to the burner a bend can be is 30ft. Figure . 9.
4" SUSPENSION BRACKET 6" "A" VIEW ON "A" TUBE STRAP REFLECTOR TUBE STRAP DETAIL F DETAIL S SLIDING REFLECTOR BRACKET G FIXED REFLECTOR BRACKET SUPPLIED NUT & BOLT REFLECTOR DETAIL TUBE & REFLECTOR SUSPENSION BRACKET 2 x SCREWS MIN 1/8" GAP TO ALLOW REFLECTOR TO SLIDE H G COUPLER 2 x SCREWS TIGHTEN TO FIX REFLECTOR RADIANT TUBE DETAIL BURNER INSERT (SEE DETAIL) NAT GAS ONLY 10' 3" REFLECTORS TYPICAL OF 2 DISTANCE BETWEEN SUSPENSION POINTS NO TO EXCEED 12' FIRST SUSPENSION POIN
12.
"A" 6" TUBE STRAP REFLECTOR TUBE STRAP DETAIL F DETAIL S SLIDING REFLECTOR BRACKET G FIXED REFLECTOR BRACKET SUPPLIED NUT & BOLT REFLECTOR DETAIL 2 x SCREWS MIN 1/8" GAP TO ALLOW REFLECTOR TO SLIDE H TUBE & REFLECTOR SUSPENSION BRACKET F COUPLER 6" REFLECTOR OVERLAP 2 x SCREWS TIGHTEN TO FIX REFLECTOR RADIANT TUBE DETAIL G COUPLER *(HIGH TEMP COUPLER MODELS 125/150) BURNER INSERT (SEE DETAIL) NAT GAS ONLY VIEW ON "A" 4" 10' 3" REFLECTORS TYPICAL OF 4 DISTANCE BETWEEN SUSPENS
"A" 4" TUBE STRAP VIEW ON "A" TUBE STRAP REFLECTOR G DETAIL F DETAIL S SLIDING REFLECTOR BRACKET DETAIL TUBE & REFLECTOR SUSPENSION BRACKET FIXED REFLECTOR BRACKET SUPPLIED NUT & BOLT REFLECTOR G COUPLER G 2" MINIMUM REFLECTOR OVERLAP CL STANDARD 4" COUPLER S 6" REFLECTOR OVERLAP COUPLER *(HIGH TEMP COUPLER MODEL 170 & 200) 2 x SCREWS MIN 1/8" GAP TO ALLOW REFLECTOR TO SLIDE H F 6" REFLECTOR OVERLAP 2 x SCREWS TIGHTEN TO FIX REFLECTOR RADIANT TUBE DETAIL G COUPLER * (HI
6" 4" "A" VIEW ON "A" TUBE STRAP REFLECTOR *HT COUPLER 10' 3" REFL'S TYPICAL OF 6 TUBE STRAP DETAIL F DETAIL S SLIDING REFLECTOR BRACKET G FIXED REFLECTOR BRACKET DETAIL 2 x SCREWS MIN 1/8" GAP TO ALLOW REFLECTOR TO SLIDE SUPPLIED NUT & BOLT REFLECTOR S G F 2" MINIMUM REFLECTOR OVERLAP CL G COUPLER 3" OVERLAP STANDARD 4" COUPLER COUPLER 6" OVERLAP TUBE & REFLECTOR SUSPENSION BRACKET F COUPLER *(HIGH TEMP COUPLER MODELS 170 & 200) 6" OVERLAP G 2 x SCREWS TIGHTEN TO FIX
6" 4" "A" VIEW ON "A" TUBE STRAP REFLECTOR HT COUPLER TUBE STRAP COUPLER G DETAIL S SLIDING REFLECTOR BRACKET DETAIL FIXED REFLECTOR BRACKET DETAIL F G TUBE & REFLECTOR SUSPENSION BRACKET S 6" OVERLAP 2 x SCREWS MIN 1/8" GAP TO ALLOW REFLECTOR TO SLIDE SUPPLIED NUT & BOLT REFLECTOR F COUPLER *(HIGH TEMP COUPLER MODELS 170 & 200) 6" OVERLAP G 2 x SCREWS TIGHTEN TO FIX REFLECTOR RADIANT TUBE DETAIL H FIRST SUSPENSION POINT TUBE STRAP RADIANT TUBE SUPPLIED NUT & BOLT DISTANC
6" 4" 28 "A" VIEW ON "A" TUBE STRAP REFLECTOR F TUBE STRAP DETAIL F DETAIL S SLIDING REFLECTOR BRACKET G FIXED REFLECTOR BRACKET DETAIL 2 x SCREWS MIN 1/8" GAP TO ALLOW REFLECTOR TO SLIDE SUPPLIED NUT & BOLT REFLECTOR F G S COUPLER 3" OVERLAP G 2" MINIMUM REFLECTOR OVERLAP CL STANDARD 4" COUPLER COUPLER 3" OVERLAP TUBE & REFLECTOR SUSPENSION BRACKET S COUPLER 6" OVERLAP G 2 x SCREWS TIGHTEN TO FIX REFLECTOR RADIANT TUBE DETAIL H G HT COUPLER 6" OVERLAP FIRST SUSPENSI
"A" VIEW ON "A" TUBE STRAP REFLECTOR 4" TUBE STRAP SUPPLIED NUT & BOLT REFLECTOR H DETAIL F FIXED REFLECTOR BRACKET 2 x SCREWS TIGHTEN TO FIX REFLECTOR RADIANT TUBE DETAIL 10' 3" REFLECTORS TYPICAL OF 2 DISTANCE BETWEEN SUSPENSION POINTS NO TO EXCEED 12' DETAIL G TUBE & REFLECTOR SUSPENSION BRACKET H G 2" MINIMUM REFLECTOR OVERLAP CL STANDARD 4" COUPLER BURNER INSERT (SEE DETAIL) NAT GAS ONLY COUPLER F F NOTE: FOR MODEL VCT 60 AND VCS 80 NAT GAS ONLY BURNER INSERT DETAIL P
4" 30 "A" H G VIEW ON "A" TUBE STRAP REFLECTOR TUBE STRAP DETAIL F DETAIL S SLIDING REFLECTOR BRACKET G FIXED REFLECTOR BRACKET DETAIL 2 x SCREWS MIN 1/8" GAP TO ALLOW REFLECTOR TO SLIDE SUPPLIED NUT & BOLT REFLECTOR H G 2 x SCREWS TIGHTEN TO FIX REFLECTOR RADIANT TUBE DETAIL COUPLER *(HIGH TEMP COUPLER MODELS 125 & 150) G TUBE & REFLECTOR SUSPENSION BRACKET BURNER INSERT (SEE DETAIL) NAT GAS ONLY 10' 3" REFLECTORS TYPICAL OF 4 DISTANCE BETWEEN SUSPENSION POINTS NO TO EXCEED 12'
4" 31 DISTANCE BETWEEN SUSPENSION POINTS NO TO EXCEED 12' H "A" VIEW ON "A" TUBE STRAP DETAIL F DETAIL S SLIDING REFLECTOR BRACKET G FIXED REFLECTOR BRACKET DETAIL TUBE & REFLECTOR SUSPENSION BRACKET F 2" MINIMUM REFLECTOR OVERLAP CL STANDARD 4" COUPLER COUPLER *(HIGH TEMP COUPLER MODELS 170 & 200) 6"-9" REFLECTOR OVERLAPS F 2 x SCREWS MIN 1/8" GAP TO ALLOW REFLECTOR TO SLIDE SUPPLIED NUT & BOLT REFLECTOR H G G 2 x SCREWS TIGHTEN TO FIX REFLECTOR RADIANT TUBE DETAIL HT COUPLE
4" H "A" VIEW ON "A" TUBE STRAP REFLECTOR HT COUPLER TUBE STRAP HT COUPLER DETAIL F DETAIL S SLIDING REFLECTOR BRACKET G FIXED REFLECTOR BRACKET DETAIL 2 x SCREWS MIN 1/8" GAP TO ALLOW REFLECTOR TO SLIDE SUPPLIED NUT & BOLT REFLECTOR F 6"-9" REFLECTOR OVERLAPS F TUBE & REFLECTOR SUSPENSION BRACKET G G 2 x SCREWS TIGHTEN TO FIX REFLECTOR RADIANT TUBE DETAIL H FIRST SUSPENSION POINT TUBE STRAP RADIANT TUBE DISTANCE BETWEEN SUSPENSION POINTS NO TO EXCEED 12' 10' 3" REFLECTORS
3. Start Up Instructions. These appliances should be commissioned by a qualified mechanical contractor. 3.1 Tools Required. The following tools and equipment are advisable to complete the tasks laid out in this manual. Leather Faced Gloves Small Flat Head Screwdriver Phillips Screwdriver ½” Wrench 3.2 Suitable alternative tools may be used. 5/32” (4mm) Allen Wrench Manometer Large Adjustable Wrenches for fitting Of Gas Flex.
Start the screwdriver turning the pressure or pressure. heater and using a suitable adjust the pressure regulator, screw clockwise to increase the counter-clockwise to decrease the Set the pressure to appropriate inches w.c. from the table of gas pressures and orifice plate dimensions for correct heater description. Switch off the power supply to the heating system. Disconnect ‘U’ tube manometer, then securely replace screw in pressure test nipple.
Commissioning chart Check installation has been carried out to these instructions. Ensure gas and electricity supplies are isolated. Disconnect gas hose from burner Remove burner from tube and inspect burner head. (See servicing instructions) Replace burner on tube and secure. Reconnect gas hose. Open Manual valve. Check soundness. Check thermostat is set to maximum and is calling for heat. Open control housing and check that all components are securely fastened. Switch on electrical supply.
4. Servicing Instructions. These appliances should be serviced annually by a competent person to ensure safe and efficient operation. In mildly dusty or polluted conditions more frequent servicing may be required. Servicing work should be carried out by a qualified mechanical contractor. 4.1 Tools Required. Suitable alternative tools may be used. The following tools and equipment are advisable to complete the tasks laid out in this manual.
4.3 Burner Removal Step 1: Isolate power and gas supplies. Step 2: Disconnect the external power/control connections. Step 6: Remove the burner and position the burner in a safe area to prevent the burner or components attached to the burner from falling to the ground. Step 3: Detach the gas supply as shown below, taking care to support the burner connection. 4.4 Burner Gas Injector Servicing Step 1: Remove the 4 retaining screws, then remove the burner support casting and gasket.
Step 3: The gas injector can be inspected and replaced if contaminated or blocked. When replacing the gas injector approved thread sealant is used. ensure Step 4: Reconnect ignition leads and silicone tube to test nipple. Refit gasket and support casting. 4.5 Combustion Fan Servicing Step 1: Remove the four top lid screws to reveal the combustion fan shown below. Step 4: Remove fan orifice plate. Step 5: Inspect the impeller and remove any dust with a soft brush.
Step 4: Refit the electrode assembly and ensure the connections are secure to prevent incorrect sparking of the spark electrode. Step 3: If required the interior of the tubes can then be cleaned using an industrial vacuum cleaner or by using long poles and a scraper. Step 5: Check the positions and spark gap as shown in diagram below. 4.8 Reflector Servicing The condition of the reflectors should be noted. If necessary the reflectors can be cleaned with a mild detergent.
5. Spare Parts. Required Spares In order to aid troubleshooting and servicing we recommend that the components shown in this section should be stocked. Item Description Part No.
6. Troubleshooting Guide. START Ensure gas & electricity supplies are enabled. Turn any external timer to call for heat (if fitted). Does the Power On light illuminate? NO Is there power to the burner? YES CHECK: 1. Internal fuse. 2. Integrity of wiring connections. 3. Light. NO CHECK: 1. Operation of any timer or control. 2. External fuses. 3. Voltage is 120VAC. YES Set two-stage thermostat to call for heat at maximum setting (High Fire).
Do the amber lights remain illuminated after 11 seconds? NO Does the burner spark? YES NO CHECK: 1. Spark gap correct (7/64" ± 1/64"). 2. Ignition controller. YES END If the heater still fails to operate correctly, contact your local representative.
7. Replacing Parts. 7.2 Air Pressure Switch Replacement Turn off gas and any electrical supplies to the heater before starting repair work. Step 1: Disconnect the two silicone tubes from the pressure switch. 7.1 Burner Controller Replacement Step 1: Remove the four screws securing the bottom access door. Step 2: Disconnect burner controller from the wiring harness. Step 2: Remove the two electrical chassis retaining screws arrowed. Step 3: Disconnect the Spark Lead from burner controller.
Step 5: Fit the new air pressure switch ensuring the tubes are connected as shown below. Step 5: Remove the four screws (arrowed) securing the gas valve inlet plate to the burner housing and remove plate. Step 6: Re-connect wiring. Step 7: Test product and close access door. 7.3 Gas Valve Replacement Step 1: Remove the burner assembly as described in the Servicing section. Step 2: Open the rear access door.
270634 270635 170 200 270628** 270627* 270623 270622 270621 270620 270619 Propane Gas & Propane Altitude Conversion Kit 270615 Wind & Rain Hood Kit (Outdoor Only) * Burner de-rated when converted to propane ** Burner de-rated when converted to propane. Not for use at altitude. 270633 270631 100 150 270630 80 270632 270630 60 125 Natural Gas Altitude Conversion Kit MODEL 270713 Stainless Steel End Cap Kit (1Pair) 270284 90° Elbow Kit (1 Off) 270283 180° U-Bend Kit 7.
270634 270635 170 200 270628** 270626*** 270623 270622 270621 270620 270619 Propane Gas & Propane Altitude Conversion Kit 270615 Wind & Rain Hood Kit (Outdoor Only) ** Burner de-rated when converted to propane. Not for use at altitude. *** Not for use at altitude. 270633 270631 100 150 270631 80 270632 270630 60 125 Natural Gas Altitude Conversion Kit MODEL 270713 Stainless Steel End Cap Kit (1Pair) 270284 90° Elbow Kit (1 Off) 270283 180° U-Bend Kit Table 6b.
Notes.
8. User & Operating Instructions. Radiant tubular infrared heaters are designed for overhead heating of industrial and commercial buildings. Individual heating units are suspended from the roof installer. 8.1 1. This appliance must only be installed by qualified in accordance with the requirements of local and National Codes. 2. This appliance must be grounded in accordance with the National Electrical Code ANSI/NFPA No.70 or Canadian Codes. 3.
