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Therma Grow ™  120 and 22

Wiring the Air Inlet and Exhast Fan

IND L1 HSI HSIG L2 W PSI FSI GV PSO FSG C

EXISTING

WIRING

FROM

CONTROL

BLACK

JUNCTION 

BOX

RED
BROWN
BLACK
WHITE
GREEN

BLACK
WHITE
GREEN

GROUND

GROUND

WHITE

WHITE (TO 

VENTILATION 

MOTORS)

KITS - 8 1/2 IN. BLACK WIRE

WIRE FROM IGNITION 

CONTROL WITH 

TERMINAL REMOVED

AIR INLET AIR PROVING SWITCH

HEATER AIR PROVING SWITCH

LEAD "B"

MOTOR

BLACK

THREE WAY 

TERMINAL

LEAD "A"

BUTT 

SPLICE

NEUTRAL

NEUTRAL

115 V

AC

115 V

AC

EXHAUST

 F

AN 

CONNECTIONS

AIR INLET

 SHUTTER MOT

OR 

CONNECTIONS

Contact your local L.B. White dealer for replacement parts

and service. You may also call the L.B. White Co., LLC at  

U.S. & Canada: 1-800-345-7200, Overseas: 001-608-783-5691 

assistance, or email us at [email protected].

Be sure that you have your heater model number and

configuration number when calling.

Service

WORLD PROVIDER - INNOVATIVE 
HEATING SOLUTIONS

411 Mason Street, Onalaska, WI 54650 
800-345-7200  •  608-783-5691 
608-783-6115 (fax)  

www.lbwhite.com

150-28705 REV.B

Summary of Contents for Therma Grow 120

Page 1: ...g must be done in accordance with local codes In absence of local codes follow ANSI NFPA 70 National Electrical Code General Information Proper installation for heaters located within the greenhouse r...

Page 2: ...Air Inlet Locations END WALL DUCT COLLAR INSTALLED TO AIR INLET OF HEATER CLAMP CLAMP COLLAR WITH COVER INSTALLED TO AIR INLET 10 FT MAX FROM AIR INLET OF HEATER TO AIR INLET ALTERNATE INLET LOCATIONS...

Page 3: ...n the heater s discharge See Fig 3 The exhaust fan does not need to be directly in line to the heater 2 Provide a 10 1 4 in x 10 1 4 in square and level opening Suitable framing may be required for mo...

Page 4: ...OUNTED INSIDE GREENHOUSE GAS SUPPLY INLET HOOD MOTOR MOTOR ARM 10 32 X 1 1 4 MACHINE SCREW INSERT 10 32 WASHER WASHER SPACER 10 X 7 8 AIR PROVING SWITCH SCREW 1 4 X 3 8 2 NUT 10 32 WITH STAR WASHER 4...

Page 5: ...ee way terminal See Fig 7 Connect this assembly to terminal IND on the ignition control FIG 7 3 Connect the wiring from the junction box to the heater s control box as follows Use wire nuts supplied f...

Page 6: ...ontrol wiring instruc tions Ensure 115 VAC is supplied to the exhaust fan motor and air inlet shutter motor Both will operate when the heater starts a On start up the heater s fan motor will run for 5...

Page 7: ...TH SCREWS 500 25314 SHUTTER MOTOR 500 26012 BRACKET WITH MOUNTING SCREWS AND NUTS LEAD A LEAD A BUTT SPLICE WIRE FROM IGNITION CONTROL WITH TERMINAL REMOVED IND L1 HSI HSIG L2 W PSI FSI GV PSO FSG C A...

Page 8: ...REE WAY TERMINAL LEAD A BUTT SPLICE NEUTRAL NEUTRAL 115 VAC 115 VAC EXHAUST FAN CONNECTIONS AIR INLET SHUTTER MOTOR CONNECTIONS Contact your local L B White dealer for replacement parts and service Yo...

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