Desa BLP50VA Operation, Storage, 50,000 BTU/HR PROPANE CONSTRUCTION HEATER, To Start Heater

50,000 BTU/HR

PROPANE CONSTRUCTION HEATER

OPERATION

WARNING: Review and un- derstand the warnings in the Safety Information section, page

2.They are needed to safely op- erate this heater. Follow all local codes when using this heater.

TO START HEATER

1.Follow all installation, ventilation, and safety information.

2.Locate heater on stable and level sur- face. Make sure strong drafts do not blow into front or rear of heater.

3.Plug power cord of heater into a three- prong, grounded extension cord. Exten- sion cord must be at least six feet long. Extension cord must be UL listed.

Extension Cord Wire Size Requirements

Up to 50 feet long, use 18 AWG rated cord. 51 to 100 feet long, use 16 AWG rated cord. 101 to 200 feet long, use 14 AWG rated cord.

4.Plug extension cord into a 120 volt/60 hertz, 3-hole, grounded outlet. Motor will start. Fan will turn, forcing air out front of heater.

5.Open propane supply valve on propane tank(s) slowly. Note: If not opened slowly, excess-flow check valve on pro- pane tank may stop gas flow. If this happens, close propane supply valve and open again slowly.

WARNING: Be sure motor and fan are running before pushing in automatic control valve but- ton. Flames could flash outside heater if motor and fan are not running.

6.Turn control knob to the low position and push in (see Figure 8). Hold knob in and push piezo ignitor button. You may need to push piezo ignitor button 3-8 times until the main burner lights. When main burner lights, keep auto- matic control valve knob pushed in. Release button after 30 seconds.

Note: If main burner fails to light, hose may have air in it. If so, keep control knob pressed and wait 20 seconds. Re- lease control knob and wait 20 seconds for unburned fuel to exit heater. Repeat step 6.

7.If main burner goes out, repeat step 6.

8.When main burner remains lit, rotate control knob to the desired heat level.

OFF

START/

LOW

MED

HIGH

Figure 8 - Control Knob Positions

Piezo Ignitor

Button

Automatic Control

Valve Knob

Figure 9 - Automatic Control Valve Button and Piezo Ignitor Button

TO STOP HEATER

1.Tightly close propane supply valve on propane tank(s). Allow heater to burn remaining fuel in hose.

2.Shut off main burner valve. Do this by turning control knob to the OFF posi- tion until it stops.

TO RESTART HEATER

1.Wait five minutes after stopping heater.

2.Repeat steps under To Start Heater, column 1.

STORAGE

CAUTION: Disconnect heater from propane supply tank(s).

1.Store propane tank(s) in safe manner. See Chapter 5 of Standard for Storage and Handling of Liquefied Petroleum Gases, ANSI/NFPA 58. Follow all lo- cal codes. Always store propane tanks outdoors.

2.Place plastic cover caps over brass fittings on inlet connector and hose/ regulator assembly.

3.Store in dry, clean, and safe place. Do not store hose/regulator assembly in- side heater combustion chamber.

4.When taking heater out of storage, al- ways check inside of heater. Insects and small animals may place foreign ob- jects in heater. Remove motor and other internal parts if needed to remove for- eign objects (see Service Procedures, page 8).

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