SCHEU UNIVERSAL 24-IR (01) PDF Document

The specifications for the SCHEU UNIVERSAL heater series are as follows:

TYPE OF GAS: For use with Propane Only

INPUT RATING:

12-IR: 11,000 BTU/hr

24-IR/24-IRP: 22,000 BTU/hr

36-IR: 33,000 BTU/hr

48-IR: 44,000 BTU/hr

MANIFOLD PRESSURE: 28″ Water Column

ORIFICE SIZE: No. 69 Drill

Failure to comply with the precautions and instructions provided with the SCHEU UNIVERSAL 24-IR heater can result in death, serious bodily injury, and property loss or damage from hazards of fire, explosion, burn, asphyxiation, and carbon monoxide poisoning. Only persons who can understand and follow the instructions should use or service this heater.

This is a propane, direct-fired heater. Its intended use is primarily for the temporary heating of buildings under construction, alteration, or repair. It is important to note the following warning: NOT FOR HOME OR RECREATIONAL VEHICLE USE.

1. Check the heater thoroughly for damage. DO NOT operate a damaged heater.

2. Do not modify the heater or operate a heater which has been modified from its original condition.

3. Use only propane gas.

4. Use only VAPOR WITHDRAWAL propane cylinders. If there is any question about vapor withdrawal, ask your propane dealer.

5. Mount propane cylinders vertically (shutoff valve up). Secure them from falling or being knocked over and protect them from damage.

6. Do not direct heat toward propane cylinders.

7. Use only the hose and regulator assembly provided with the heater. Inspect hose assembly before each use of the heater. If there is excessive abrasion or wear, or if the hose is cut, replace it with the hose assembly listed on the parts list before using the heater. The hose and fittings shall be protected from damage and deterioration.

8. For indoor or outdoor use. The AREA MUST BE WELL VENTILATED. Provide minimum openings of 1 sq. ft. near the floor and 1 sq. ft. near the ceiling.

9. If at any time gas odor is detected, IMMEDIATELY DISCONTINUE operation until the source of gas has been located and corrected.

10. Install the heater such that it is not directly exposed to water spray, rain, dripping water and/or wind.

11. Maintain minimum clearance from normal combustible materials (like paper) as follows: rear-2 ft.; sides-3 ft.; front-6 ft. Locate 10 ft. from canvas or plastic tarpaulins or similar coverings and secure them to prevent flapping or movement due to wind action.

12. Operate only on a stable, level surface.

13. Since permanent skin tissue damage can occur, avoid contact with the unit while it is operating or shortly after it has been shut off.

14. Operate the unit in a draft-free area or protect the heater from drafts.

15. Do not move, handle or service while hot or burning.

16. Use only in accordance with local codes or, in the absence of local codes, with the Standard for the Storage and Handling of Liquefied Petroleum Gases ANSI/NFPA 58-1998, and National Fuel Gas Code ANSI Z223.1/NFPA.

Propane: Propane is heavier than air. If propane leaks from a connection or fitting, it sinks to the floor and can form a potentially explosive mixture. Propane leaks should be avoided. Set up the propane supply with utmost care. Always leak check new connections or reconnections with a soap and water solution.

Carbon Monoxide (CO): This is a direct-fired heater, meaning all combustion products enter the heated space. Although it operates at nearly 100 percent combustion efficiency, it still produces small amounts of carbon monoxide (CO), which is toxic. CO can build up in a heated space, and failure to provide adequate ventilation could result in death. The symptoms of inadequate ventilation are:

headache

dizziness

burning eyes and nose

nausea

dry mouth or sore throat

Be sure to follow all advice about VENTILATION in the operating instructions.

1. Inspect the heater for possible shipping damage. If any is found, immediately notify the dealer.

2. Follow all of the “Safety Precautions” and “Operating Information”.

3. The heater is to be hooked up to the regulator (set at 28″ water column) supplied with the heater.

a) Lay the heater reflector down on a flat level surface (the manifold mounting lug will be up).

b) Attach the manifold to the burner/reflector assembly as shown in the exploded view.

c) Be sure that the neck(s) of the manifold are pushed all of the way into the one (1) inch tube(s) of the burner assembly(s).

d) Position and tighten the adapter clamp(s).

e) The manifold mounting lug (the rectangular piece of 1/8″ thick steel that is welded to the manifold) must face the direction shown in the exploded view.

f) Attach the loose thermocouple end to the connection at the thermoelectric valve.

g) Tighten the connection finger tight, then tighten an additional maximum 1/4 turn using a 3/8″ open end wrench.

a) Assemble the flattened end of the heater support to the manifold mounting lug with a lock bolt (3/8-16 x 1 1/4 bolt).

b) Place the 3/8-16 whiz nut onto the remaining 3/8-16 x 1 1/4 bolt, with the nut serrations away from the bolt head.

c) Attach the lock bolt assembly into the remaining base support weld nut, making sure that the nut serrations face the base support.

d) Mount the heater onto a standard 20 or 40 # propane cylinder by placing the slot in the heater support over the propane cylinder flange. Tighten the lock bolt assembly, then secure with the nut.

1. Check the ‘O’ ring on the POL before each use. Replace the ‘O’ ring if there is any sign of wear or damage.

2. After the heater is securely attached to the propane cylinder, connect the POL fitting of the hose and regulator assembly to the propane cylinder by rotating the POL nut counterclockwise into the propane cylinder’s valve outlet. Securely tighten with a wrench.

3. Securely tighten all gas connections.

4. Open the cylinder’s gas valve and check all gas connections with a soap and water solution. DO NOT USE A FLAME.

WARNING: DO NOT LOOK OVER TOP OF HEATER (REFLECTOR) DURING IGNITION. This heater may produce a small puff of flame during ignition, which could result in serious bodily injury.

1. Fully open the valve on the propane cylinder.

2. Depress the red button on the safety valve admitting gas to the heater. Place a lighted match near the face of the ceramic element using the hole located on the side of the reflector. If the hose is filled with air, allow a few seconds for gas to reach the element. DO NOT LIGHT AT THE ORIFICE.

3. When the gas on the face of the ceramic element lights, continue to hold the button depressed for 30 seconds, then release. On multiple head units, check to see that all elements are burning.

4. If the flame goes out, wait 5 minutes and repeat the lighting procedure.

Yes, for the 24-IRP model with Piezo ignition:

1. Depress the red button on the safety valve admitting gas to the heater.

2. Push and release the piezo ignition button until the gas on the surface of the grid ignites. This may take several strikes of the piezo.

3. Ignition may be observed using the holes located on the sides of the reflector. DO NOT LOOK OVER TOP OF REFLECTOR! If the hose is filled with air, allow a few seconds for the gas to reach the grids.

1. Securely close the valve at the propane cylinder.

2. Do not attempt to relight for 5 minutes.

1. Securely close the valve at the propane cylinder.

2. Wait 5 minutes.

3. Restart following the “Start” procedure.

A hazardous condition may result if a heater is used that has been modified or is not functioning properly. When the heater is working properly:

The flame is contained near the surface of the ceramic grid(s).

The flame is essentially blue.

There is no strong disagreeable odor, eye burning or other physical discomfort.

There is no smoke or soot internal or external to the heater.

There are no unplanned or unexplained shutdowns of the heater.

A heater which is not working right must be repaired, but only by a trained, experienced service person.

1. The heater should be inspected before each use, and at least annually by a qualified person.

2. Before each use, check the soft “O” ring seat at the bullnose of the POL fitting. If the “O” ring is cut, scuffed, or otherwise damaged, replace it with part number 6681.

3. Turn off the gas at the LP-gas supply cylinder(s) when the heater is not in use.

4. When the heater is to be stored indoors, the connection between the LP-gas supply cylinder(s) and the heater must be disconnected and the cylinder(s) removed from the heater and stored outdoors and in accordance with Chapter 5 of the Standard for Handling of Gases ANSI/NFPA 58-1998.

* If ambient temperatures will be less than 60°F, increase the propane supply accordingly.

During use, liquid propane in a container vaporizes. As it vaporizes, the propane cools itself. This cooling process is known as the refrigeration effect. If it continues long enough and proceeds fast enough, the propane temperature and pressure will fall so low that heater operation may be improper or even impossible, even though plenty of propane remains in the container. Often, frost forms on the outside of the propane container as a warning of excessive refrigeration.

The following are recommendations to reduce the ill effects of the refrigeration effect:

Provide considerably more propane than you plan to consume. As a rule of thumb, provide twice as much.

Fill containers frequently, especially in cold weather.

Never allow propane to fall below one-third of the container’s capacity.

If possible, keep containers in a warm area. Under no circumstances should the heater exhaust be directed toward the propane container.