Therma Grow™ Greenhouse Heaters
www.lbwhite.com
Owner’s Manual • Therma Grow™
2
TABLE OF CONTENTS
Heater Specifications
..................................................................................................... 4
General Information ....................................................................................................... 5
Safety Precautions ........................................................................................................ 6
Installation Instructions
General ....................................................................................................................... 8
Air Discharge Diverter Duct ...................................................................................... 11
Indoor Ventilation Requirements .............................................................................. 11
Hanging the Heater .................................................................................................. 13
Sediment Trap Assembly .......................................................................................... 13
Thermostat Installation ............................................................................................. 13
Hose & Regulator Assembly ..................................................................................... 15
Start-Up Instructions .................................................................................................... 16
Shut-Down Instructions ............................................................................................... 17
Cleaning Instructions ................................................................................................... 17
Maintenance Instructions ............................................................................................. 17
Service Instructions
Motor & Fan Wheel Assembly .................................................................................. 18
Air Proving Switch ..................................................................................................... 19
High Limit Switch ...................................................................................................... 19
Gas Control Valve ..................................................................................................... 19
Igniter and Flame Sensor ......................................................................................... 20
Gas Pressure Check ................................................................................................... 20
Troubleshooting Guide ................................................................................................ 22
Electrical Connection & Ladder Diagram. .................................................................... 28
Service Parts Identification Schematic
........................................................................ 34
Warranty Policy, Replacement Parts, and Service ...................................................... 38
WARNING
Standard products are manufactured to operate at optimum efficiency at elevations
between 0 and 2000 ft. above sea level.
If operated at higher elevations the product will not function correctly and may
function in an unsafe nature.
Products providing proper operation for alternate elevations may be available.
If you require a high elevation product, did not specify when ordering, and/or the
box this unit came in does not have an alternate altitude designation sticker please
contact technical support.