113680-01A ACCESSORIES Purchase these heater accessories from your local dealer. If they can not supply these accessories, either contact your nearest Parts Central (see page 31) or call DESA Heating Products at 1-866-672-6040 for referral information. You can also write to the address listed on the back page of this manual. BASE KIT - GA4550 EQUIPMENT SHUTOFF VALVE For all models. For locating heater on the floor, GA5010 away from a wall. Complete installation and op- For all models. Equipment

CAUTION: This appliance is hot during normal operation, avoid physical contact. CAUTION: Do not place clothing or other combustible materials on this appliance. DO NOT operate this heater if any part has been under water. Call a qualified service technician to inspect the appliance and to replace any part of the control system or gas control valve which has been under water. LIGHTING HEATER 1. Before attempting to light the heater, smell all around the heater area for gas. Turn on the gas supply

10. Keep propane tank(s) below 38° C (100° F). 11. Check heater for damage before each use. Do not use a damaged heater. 12. Check hose before each use of heater. If highly worn or cut, replace with hose specified by the manufacturer before using heater. 13. Locate heater on stable and level surface if heater is hot or operating. 14. Not intended for use on finished floors. 15. Never block air inlet (bottom of combustion chamber) or air outlet (glowing combustion chamber) of heater. 16. Keep hea

Improper use of heater can cause serious injury. Keep this manual for future reference. 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 elctrical shock. Only persons who can understand and follow the instruc tions should use or service this heater. If you need assistance or heater i

30° and 60° Deflector Hoods — Propeller and Blower Models Figure A 30° Hood 60° Hood Figure B — Throw/Floor Coverage Note: O-X = Feet from heater to start of floor coverage. O-Y = Feet to end of floor coverage. O-Z = Feet to end of throw. MOUNTING HEIGHT X Y Y Z Z X 60 NOZZLE 30 NOZZLE 60 30 30 DOWNTURN NOZZLE 60 DOWNTURN NOZZLE 20 PERFORMANCE DATA Heater Parts from ACF Greenhouses PERFORMANCE DATA 90° Downward Deflector Hood — Propeller and Blower Models Figure C 90° Hood Figure D H S S 21 30°,

This provides fuel to the heater. The Ignition System: The piezo ignitor lights the pilot. TheAutomatic Control System: This system causes the heater to shut down if the flame goes out. PRODUCT IDENTIFICATION Outer Shell 80,000 B T U / H R Ignitor Button Ball Valve Safety Pilot Control Knob Valve Figure 1 - 80,000 Btu Model Shown VENTILATION WARNING: Provide at least a 2.5 square foot (0.23 m2) opening of fresh, outside air while running heater. If proper fresh, outside air ventilation is not pr

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Installation (including venting) . . . . . . . . . . . . . . . . . . . . . . .2-8 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-10 Checking input rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Dimensional data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 & 15 Performance data . . . . . . . . . . . . . . . . . . . . . . . .13, 14 & 16-19 Service instru

Improper use of heater can cause serious injury. Keep this manual for future reference. CONTENTS SECTION_PAGE Safety Information.........................................................................3 Product Identification....................................................................4 Unpacking......................................................................................4 Theory of Operation......................................................................5 Propane Su

The equipment shutoff valve is for turning on or shutting off the gas to the appliance. Apply pipe joint sealant lightly to male NPT threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves. WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas. Install sediment trap in supply line as shown in Figure 15, page 13. Locate sediment trap where it is within reach for cleaning. Locate sediment trap where trapp

_______________Btu/Hr (maximum the space can support) _______________Btu/Hr (actual amount of Btu/Hr used) Example: 51,200 Btu/Hr (maximum the space can support) 70,000 Btu/Hr (actual amount of Btu/Hr used) The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows: A. Rework worksheet, adding the space of an adjoining room. If the extra space provides