Desa Tech 6BY71, 6BY73, 6BY74 Owner's Manual

Operating Instructions and Parts Manual

200

,000

Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or property damage! Retain instructions for future reference.

6BY71, 6BY73 and 6BY74

Dayton® Propane Gas Convection Construction Heaters

Description

Dayton Model 6BY71 is a 25,000 Btu/Hr construction heater intended for indoor or outdoor use. Model 6BY73 heater is a 80,000 Btu/Hr construction heater and model 6BY74 is a 200,000 Btu/Hr construction heater. Models 6BY73 and 6BY74 are intended for indoor use only. These heaters use propane gas for combustion and are intended for the temporary heating of well-ventilated buildings under construction, alteration, or repair. This heater should never be used in occupied dwellings. Products of combustion are vented

into the area being heated.

Fire, burn, inhalation and explosion hazard. Keep solid combustibles, such as building materials, paper or cardboard, a safe dis-

Figure 1 - Model 6BY71

tance away from the heater as recommended by the instructions. Never use the heater in spaces which do or may contain volatile or airborne combustibles or products such as gasoline, solvents, paint thinner, dust particles or unknown chemicals.

Unpacking

1. Remove all packing items

Figure 2 - Models 6BY73 and 6BY74 (Model 6BY74 Shown)

Form 5S5382

applied to heater for shipment. Keep plastic cover caps (attached to inlet connector and hose/regulator assembly) for storage.

Remove all items from carton.

Check all items for shipping damage. If heater is damaged, promptly inform dealer where you bought heater.

Printed in China 09663 0106/010/VCPVP

GENERAL HAZARD

WARNING

Failure to comply with the precautions and instructions provided with this heater, can result in death, serious bodily injury and property loss or damage from hazards of fire, explosion, burn, asphyxiation, carbon monoxide poisoning and/or electrical shock.

Only persons who can understand and follow the instructions should use or service this heater.

If you need assistance or heater information such as an instructions manual, labels, etc. contact the manufacturer.

DES002

117162-01

05/05

Rev. B 02/06

Dayton Operating Instructions and Parts Manual

Dayton

Propane Gas Convection

Construction Heater

6BY71, 6BY73 and 6BY74

General Safety Information

Make certain you read and understand all warnings. Keep these instructions for reference. They are your guide to safe and proper operation of this heater.

Safety information appears throughout these instructions. Pay close attention to them. Below are definitions for the safety information listed throughout this manual.

Under this heading, installation, operating and maintenance procedures or practices will be found that, if not carefully followed, WILL result in IMMEDIATE serious personal injury or death.

Under this heading, installation, operating, and maintenance procedures or practices will be found that, if not carefully followed, COULD result in severe personal injury or death.

Under this heading, installation, operating, and maintenance procedures or practices will be found that, if not carefully followed, MAY result in minor personal injury, product or property damage.

IMPORTANT: Not every possible circumstance that might involve a hazard can be anticipated. The warnings in this manual and on tags or decals affixed to the unit are therefore not all-inclusive. If a procedure, work method, or

operating technique not specifically recommended by Dayton is used, you must make sure it is safe for you and others. You should also ensure that equipment will not be damaged or made unsafe by the operating or maintenance method you choose.

Not for home or recreational vehicle use.

This product contains and/or generates chemicals known to the State of California to cause cancer or birth defects, or other reproductive harm.

The heater is designed for use as a construction heater in accordance with ANSI Z83.7/CGA 2.14. Other standards govern the use of fuel gases and heating products for specific uses. Your local authority can advise you about these. The primary purpose of construction heaters is to provide temporary heating of buildings under construction, alteration or repair. Properly used, the heater provides safe economical heating. Products of combustion are vented into the area being heated.

We cannot foresee every use which may be made of our heaters. Check with your

local fire safety authority if you have questions about heater use.

Other standards govern the use of fuel gases and heat producing products for specific

uses. Your local authorities can advise you about these.

Carbon Monoxide Poisoning:

Some people are more affected by carbon monoxide than others. Early signs of carbon monoxide poisoning resemble the ﬂu, with headaches, dizziness and/or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Check for proper ventilation and have heater serviced.

Propane Gas: Propane gas is odorless. An odor-making agent is added to propane gas. The odor helps you detect a propane gas leak. However, the odor added to propane gas may fade. Propane gas may be present even though no odor exists.

Make certain you read and understand all warnings. Keep this manual for reference. It is your guide to safe and proper operation of this heater.

1. Install and use heater with care. Follow all local ordinances and codes. In the absence of local ordinances and codes, refer to the Standard for

Storage and Handling of Liquefied Petroleum Gas, ANSI/NFPA 58. This

instructs on the safe storage and handling of propane gases.

2. Use only propane gas set up for vapor withdrawal.

3. Provide adequate ventilation. Before using heater, provide at least a 108 in.2 (700 cm2) (25,000 btu heaters), 2.5 ft2 (0.232 m2) (80,000 btu heaters) or 6 ft2 (0.557 m2) (200,000 btu heaters) opening of fresh, outside air.

Dayton Operating Instructions and Parts Manual

Models 6BY71, 6BY73 and 6BY74

General Safety Information (Continued)

4. 25,000 Btu/Hr Models: For indoor and outdoor use.

80-200,000 Btu/Hr Models:

For indoor use only. Do not use heater outdoors.

5. Keep heater away from strong drafts, wind, water spray, rain or dripping water.

6. Do not use heater in occupied dwellings, sleeping quarters, campers, tents, or any type of unvented or enclosed area.

7. Do not use heater in a basement or below ground level. Propane gas is heavier than air. If a leak occurs, propane gas may sink to the lowest possible level.

8. Keep appliance area clear and free from combustible materials, gasoline, paint thinner and other flammable vapors and liquids. Dust is combustible. Do not use heater in areas with high dust content.

9. Minimum heater clearances from combustibles:

25,000 and 80,000 Btu heaters

Sides: 3 ft (91 cm); Top: 6

ft (1.83 m)

200,000 Btu heaters Sides: 3 ft (91 cm); Top: 7

ft (2.1 m)

10. Keep heater at least 6 ft (1.83 m) from propane tank(s).

11. Keep propane tank(s) below 100° F (37.8° C).

12. Before each use, check heater for leaks. Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

13. Use only the hose and factory preset regulator provided with the heater.

14. Check heater for damage before each use. Do not use a damaged heater.

15. Check hose before each use of heater. If highly worn or cut, replace with hose specified by manufacturer before using heater.

16. Do not alter heater. Keep heater in its original state.

17. Do not use heater if altered.

18. Locate heater on stable and level surface if heater is hot or operating.

19. Not intended for use on finished floors.

20. Never block any air inlet or air outlet openings of heater.

21. Do not use heater as a cooking device. Do not place objects on top of heater.

22. Do not leave heater unattended.

23. Never operate heater while sleeping or unattended.

24. Keep children and animals away from heater.

25. Always run heater with control knob at LO, MED or HI settings. Never set control knob between OFF, LO, MED or HI settings. Flashback may occur.

26. Never move, handle or service a hot or operating heater. Severe burns may result. You must wait 15 minutes after turning heater off.

27. To prevent injury, wear gloves when handling heater.

28. Never attach duct work to heater.

29. Turn off propane supply to heater when not in use.

30. Use only original replacement parts. This heater must use design-specific parts. Do not substitute or use generic parts. Improper replacement parts could cause serious or fatal injuries.

31. Always remove heater from propane tank after each use. Always store propane tank outdoors in a well ventilated space out of the reach of children. Never store propane tank in a building, garage, or any other enclosed area. Never store propane tank near high heat, open flame, or where temperatures exceed 100° F (38° C).

32. Keep all connections and fittings clean. Make sure propane tank valve outlet is clean. Check the rubber “O” ring on the heater inlet fuel connector for damage before each use. Replace if worn or damaged.

Dayton Operating Instructions and Parts Manual

200

,000

Dayton

Propane Gas Convection

Construction Heater

6BY71, 6BY73 and 6BY74

Product Identification

Top

Shell

Piezo Ignitor Button

Hose/Regulator/ Fuel Gas Connector Assembly

Figure 3 - 25,000 Btu/Hr Model (6BY71)

Ignitor Button

Ball Valve Control Knob Button

Figure 4 - 80,000 (6BY73) and 200,000 (6BY74) Btu/Hr Models [200,000 Btu/Hr shown (6BY74)]

Base

Gas Inlet Connector

Safety Pilot Valve

Automatic Control Valve Button

Outer Shell

Valve Inlet

Ventilation

Provide at least a 3 ft2 (0.28 m2) opening of fresh, outside air for each 100,000 Btu/Hr of rating while running heater. If proper fresh, outside air ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air ventilation before running heater.

Theory of Operation

The Fuel System: The hose/regu-

lator assembly attaches to the propane gas supply. This provides fuel to the heater.

The Ignition System: The piezo

ignitor lights the pilot.

The Automatic Control System:

This system causes the heater to shut down if the flame goes out.

Propane Supply

Propane gas and propane tank(s) are to be furnished by the user.

Use this heater only with a propane vapor withdrawal supply system. See Chapter 5 of the Standard for Storage and

Handling of Liquefied Petroleum Gas, ANSI/NFPA 58. Your local

library or fire department will have this booklet.

The amount of propane gas ready for use from propane tanks varies. Two factors decide this amount.

1. The amount of propane gas in tank(s)

2. The temperature of tank(s)

Dayton Operating Instructions and Parts Manual

Models 6BY71, 6BY73 and 6BY74

Propane Supply

(Continued)

25/80,000 Btu/Hr Models: This

heater is designed to operate with a minimum 20 lb. (9 kg) tank. You may need two or more tanks or one larger tank in colder weather. Use a 100 lb. (45 kg) tank for longer operation or in very cold weather. Less gas is vaporized at lower temperatures. Your local propane gas dealer will help you select the proper supply system.

200,000 Btu/Hr Models: This heater

will operate on a minimum 40 lb (18 kg) propane tank but only for a very short time if control knob is in the lowest setting during mildly cool weather. At higher heat settings or during colder weather you may need two or more tanks or one larger tank. Use a 100 lb. (45 kg) tank for longer operation or in very cold weather.

Less gas is vaporized at lower temperatures. Your local propane gas dealer will help you select the proper supply system.

The chart that follows shows the minimum number of 100 lb (45 kg) tanks needed to run the heater. Connect tanks together with a manifold.

Smaller tanks can be used for limited run times but it is recommended to use larger tanks for optimum performance.

Average Temperature No. of 100lb At Tank Location (45 kg) tanks

25,000 Btu/Hr (6BY71)

above 0° F (-17.8° C) 1 below 0° F (-17.8° C) 1

80,000 Btu/Hr (6BY73)

above 20° F (-6.7° C) 1 below 20° F (-6.7° C) 2

200,000 (6BY74)

above 20° F (-6.7° C) 2 below 20° F (-6.7° C) 3

Specifications

Model 6BY71

• Rating: 15,000 - 25,000 Btu/Hr (15,826 - 26,376 Kj/Hr)

• Fuel: Propane/LP Gas Only

• Gas Supply Pressure to regulator: Max. - Tank Pressure, Min. - 20 psig (137.9 kPa)

• Regulator Outlet Pressure: High - 15 psi (103.4 kPa), Low - 5 psi (34.4 kPa)

• Ignition: Piezo Ignitor

• Minimum Ambient Temp. Rating: 0° F (-17.8° C)

• Fuel Consumption: Pounds (kg)/Hr - Min 0.7 (0.32), Max 1.16 (0.53)

Model 6BY73

• Rating: 40,000 - 80,000 Btu/hr (42,202 - 84,404 Kj/Hr)

• Fuel: Propane/LP Gas Only

• Gas Supply Pressure to regulator: Max. - Tank Pressure, Min. - 10 psig (68.9 kPa)

• Gas Supply Pressure regulator out: 25" W.C. (63.5 cm)

• Ignition: Piezo Ignitor

• Minimum Ambient Temp. Rating: 0° F (-17.8° C)

• Fuel Consumption: 1.9 - 3.7 lb/hr (0.86 – 1.68 kg/hr)

• Fuel Oriﬁce Port No.: 1

• Fuel Oriﬁce Port Size: 0.086" (2.18 mm)

Model 6BY74

• Rating: 75,000 - 200,000 Btu/hr (79,129 - 211,101 Kj/Hr)

• Fuel: Propane/LP Gas Only

• Gas Supply Pressure to regulator: Max. - Tank Pressure, Min. - 15 psig (103 kPa)

• Gas Supply Pressure regulator out: 10 psig (68.9 kPa)

• Ignition: Piezo Ignitor

• Minimum Ambient Temp. Rating: 0° F (-17.8° C)

• Fuel Consumption: 3.5 - 9.3 lb/hr (1.6 - 4.2 kg/hr)

• Fuel Oriﬁce Port No.: 6

• Fuel Oriﬁce Port Size: 0.0320" (0.813 mm)

Dayton Operating Instructions and Parts Manual

Dayton

Propane Gas Convection

Construction Heater

6BY71, 6BY73 and 6BY74

Installation

Review and understand the warnings in the General Safety Information section, page 2. They are needed to safely operate this heater. Follow all local codes when using this heater.

Test all gas piping and connections for leaks after installation or servicing. Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

(6BY73) 80,000 AND (6BY74) 200,000 BTU/HR MODELS ONLY

Never ignite and/or run this heater unless the shells are fully extended and locked into position.

OUTER SHELL

IMPORTANT: When the heater is first removed from carton, the outer shell is in the down position. Protect hands before lifting outer shell. Never grasp bare metal without hand protection.

1. Care must be taken to protect hands during this step. Lift outer shell straight up as shown in Figure 5, until all three clips engage slots in lower shell. Screw holes will line up at this point.

2. Lock clips into place with 3 screws as shown in Figure

5. The heater must not be operated unless the outer shell is properly extended and fully locked into place.

3 Screws per Clip

Clip in Slot of Lower Shell

Outer Shell

CONNECTING TO GAS SUPPLY

(6BY71) 25,000 BTU/HR MODELS ONLY

1. Provide propane supply system (See Propane Supply, page 4).

Wrench tighten the fuel connector nut into the propane tank valve (See Figure 6). Turn fuel connector nut counterclockwise to tighten. Threads are left-handed.

Propane Supply Valve

Propane Tank

Figure 6 - Connecting Heater to Propane Tank

Hose

Regulator

POL Fitting

Figure 5 - Lifting Outer Shell (6BY74, 200,000 Btu/hr Shown)

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