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Indirect Fired,
Indoor, Downflow,
Packaged Heaters
Installation/Operation FORM RZ-NA I-LDAP
APPLIES TO: Model LDAP
Table of Contents
Page
Warnings ......................................... 1
Installation/Operation ............... 2-29
Check/Test/Startup .................. 30-31
Accessories ..................................... 32
Maintenance/Service ............... 32-40
®
Reznor
Index (by page)
Model
Burners ...............
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Hazard Levels of HAZARD INTENSITY LEVELS 1. DANGER: Failure to comply will result in severe personal injury or death Warnings in this and/or property damage. Manual 2. WARNING: Failure to comply could result in severe personal injury or death and/or property damage. 3. CAUTION: Failure to comply could result in minor personal injury and/or property damage. All Model LDAP high bay packaged heaters are design certified by ITS for use in 1. General industrial and commercial installations. All model
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This heater was test operated and inspected at the factory prior to crating and was in 4. Uncrating and operating condition. If the heater has incurred any damage in shipment, document the damage with the transporting agency and contact an authorized Reznor Distribu- Preparation tor. If you are an authorized Distributor, follow the FOB freight policy procedures as published by Thomas & Betts for Reznor products. Check the rating plate for the gas specifications and electrical characteristics of
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Model LDAP Size 400 800 1200 6. Technical Data btuh 400,000 800,000 1,200,000 Input Heating Capacity kw/h 117.1 234.2 351.4 Thermal Efficiency (%) 83 83 83 Model One btuh 332,000 664,000 996,000 Output Heating Capacity LDAP Downflow kw/h 97.2 194.4 291.6 400 Gas Connection (Inches) Heater 11-1/4 1-1/4 Vent Connection Diameter (Inches) 68 8 Control Amps (24 volt) 1.0 2.0 3.0 Full Load Amps (208 volt) 5.6 13.6 19.4 Model LDAP 800 Full Load Amps (230 volt) 5.5 12.8 18.5 Normal Power Consumption @ 2
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FIGURE 1B - Model LDAP800 and Model LDAP1200 A Model LDAP1200 with three heat sections is illustrated. A Model LDAP800 has two heat sections. A Model LDAP800 is the same layout as illustrated less the middle heat section. Size A B inches 46 69 800 mm 1168 1753 % #
###$
# % & inches 80 103-3/4 1200 mm 2032 2635 #& $ $ #
(
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Heaters must be installed so that the clearances in the table are provided for combus- 8. Clearances tion air space, inspection and service, and for proper spacing from combustible con- struction. Clearance to combustibles is defined as the minimum distance from the heater to a surface or object that is necessary to ensure that a surface temperature of 90°F above the surrounding ambient temperature is not exceeded. Flue Front Disconnect Clearances - Top Rear Side Bottom Size Connector (Acces
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Use the clearances in Paragraph 8; the combustion air requirements in Paragraph 9; 10. Heater the mounting height requirements, throw information, sound data, and location rec- ommendations below; the weights in Paragraph 11; and the venting requirements in Location Paragraph 24 to determine where to suspend the heater. CAUTION: Do not locate the heater where it may be exposed to water spray, rain, or dripping water. Locate the heater so that it is a minimum of 15 feet (4.6M) above the floor and
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Sound Chart - Model LDAP 10. Heater Model DISTANCE Location LDAP 20 ft (6.1M) 25 ft (7.6M) 30 ft (9.1M) 35 ft (10.7M) 40 ft (12.2M) Size db Pa µbar db Pa µbar db Pa µbar db Pa µbar db Pa µbar (cont’d) 69 0.058 0.580 65 0.037 0.371 62 0.026 0.258 60 0.019 0.189 57 0.015 0.145 400 800 72 0.080 0.800 68 0.051 0.512 65 0.036 0.356 62 0.026 0.261 60 0.020 0.200 Sound Data 1200 74 0.100 1.000 70 0.064 0.640 67 0.044 0.444 64 0.033 0.327 62 0.025 0.250 µbar = microbar Pa = Pascal For best results, th
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WARNING: All heaters must be level for proper operation. Do not place or add additional weight to the suspended heater. Hazard Levels, page 2. FIGURE 4A - FIGURE 4B- Swivel Connectors to Suspend the Heater from 1” Pipe, Option Suspending the 1/2”-13 Heater with Rods CK10 Threaded Rod Pipe Coupling from the Threaded Hex Nut Assembly Nut Retainers Lockwasher Hex Nut “U”-shape Spring “U”-shape Fitting Lockwasher Nut Fitting Spring Nut Strut attached to top of heater. Strut attached to top of heater
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After the unit is suspended/mounted, install the air directional louvers or optional 11. Installing nozzle. If an optional nozzle is being installed, follow the instructions included with Heater and the nozzle. If a nozzle is not being used, install the louvers in the discharge opening(s). Louvers and springs are in the hardware kit shipped with the heater. Louvers Before actually installing the louvers, note the louver curve and determine how the (cont’d) louvers should be positioned to provide
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All piping must be in accordance with requirements outlined in the National Fuel Gas Code ANSI/Z223.1a (latest edition) or CSA-B149.1 and B149.2 (See Paragraph 2). Gas supply piping installation should conform with good practice and with local codes. Support gas piping with pipe hangers, metal strapping, or other suitable mate- rial; do not rely on the heater to support the gas pipe. Gas Connection Size The heater is orificed for operation with natural gas having a heating value of 1000 Gas Conn
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Instructions 12. Gas 1) Locate the 1/8” output pressure tap on the first valve (See FIGURE 8). With Pressures the manual valve turned off to prevent flow to the gas valve, connect a manom- (cont’d) eter to the 1/8" pipe outlet pressure tap in the valve. NOTE: A manometer (fluid- filled gauge) is recommended rather than a spring type gauge due to the difficulty Check Valve Outlet of maintaining calibration of a spring type gauge. Pressure (can only 2) Open the manual valve and operate the heater.
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4. Turn up the thermostat. Cycle the burners once or twice to properly seat the adjustment spring in the valve. Re-check the pressure(s). When the outlet pressure is right for the installation, remove the manometer and replace the cap. Check for leak at the pressure tap fitting. 5. If installing a Model LDAP 800, repeat the adjustment at the second single-stage gas valve. If installing a Model LDAP 1200, repeat the adjustment at the second and third single-stage gas valves. 6. With the heater op
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conduit and have a minimum temperature rise rating of 60°C. Conduit must be run so 14. Electrical as not to interfere with the heater access panel. Supply and CAUTION: Route wires so that they do not contact the flue wrapper Connections or venter housing. When running electrical conduit, be careful that (cont’d) it is clear of all access panels. Supply Wiring The heater is equipped with a built-in, non-fusible, lockable disconnect switch (FIG- URE 8). If a fusible disconnect is required, it must
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# #% )# #% FIGURE 10 - Thermostat
# #% &- ) %#
Connections for Model & &- LDAP 400 with Option CL1, CL2, CL3, CL7, or CL18 & )(( & & &, &
&,
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15. Thermostat and Connections (cont’d)
# #%
# #% )# #% ) %#
FIGURE 12 - Thermostat & &- &- Connections for Model LDAP 1200 with Option CL1, CL2, CL3, CL7, or CL18 & &, & &,
& . & & . . & ((
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The combustion air proving switch is a pressure sensitive switch that monitors air 16. Combustion pressure to ensure that proper combustion airflow is available. The switch is a single Air Proving pole/normally open device which closes when a differential pressure is sensed be- tween the venter housing and the flue collection box. Each section in the heater has a [Pressure pressure switch. (For switch location, see FIGURE 22, page 33.) In addition, heaters Switch(es)] with more than one heat sec
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the Maintenance Section for information on probable causes . (For location, see FIG- 18. High Limit URE 22, page 33.) Control DANGER: If a manual reset high limit control activates, identify and correct the cause before resetting the switch. Never bypass the (cont’d) high limit control; hazardous conditions could result. See Hazard Intensity Levels, page 2. An adjustable fan control is located on top of the first heat section. It is adjacent to the 19. Adjustable circulating air fan and motor an
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1) Call for Heat - The thermostat calls for heat by energizing the “W” terminal. The Normal Heat control checks to see that the limit and high limit switches are closed and the heat section Cycle Operating pressure switch is open and the main combustion air pressure switch (Sizes 800 and 1200) is open. If the limit or high limit switch is open, the control responds as defined in Sequence the “Abnormal Heat Cycle, Limit Switch Operation”. If the heat section pressure switch or main combustion air
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remain energized for an inter-purge period of 10 seconds. The spark and gas valve are 20. Ignition then re-energized, and the control initiates another trial for ignition. System If flame is not established on the second trial for ignition, the control de-energizes the gas valve, energizes the fan motor on heat speed, and the heat section venter motor and main (cont’d) venter motor remain energized. The fan motor is shut off after the longest selectable fan delay time (160 seconds). When the fan
