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-- If a leak is detected, check the components

involved for cleanliness in the thread areas
and proper application of pipe compound
before further tightening.

-- Tighten the gas connection as necessary to

stop the leak.

-- If necessary, replace the parts or components

involved if the leak cannot be stopped.

-- Ensure all gas leaks have been identified and

repaired before proceeding.

11.

A qualified service agency must check for proper
operating gas pressure upon installation of the
heater.

12.

Light according to instructions on heater or within
owner's manual.

13. It is extremely important to use the proper size and

type of gas supply line to assure proper functioning of
the heater.  Contact your fuel gas supplier for proper
line sizing and installation.

14.

This heater can be configured for use with either L.P.
gas vapor withdrawal or natural gas.  Consult the
dataplate for the gas configuration of the specific
heater.  Do not use the heater in an L.P. gas liquid
withdrawal system or application.  If you are in doubt,
contact the L.B. White Co., Inc.

15. Eventually, like all electrical/mechanical devices, the

thermostat can fail.  Thermostat failure may result in
either an underheating or overheating condition
which may damage or kill plants.  Plants should be
protected by a separate back-up control system that
limits high and low temperatures and also activates
appropriate alarms.

16. Take time to understand how to operate and maintain

the heater by using this Owner’s Manual.  Make sure
you know how to shut off the gas supply to the
building and also to the individual heater.  Contact
your fuel gas supplier if you have any questions.

17. Any defects found in performing any of the service or

maintenance procedures must be eliminated and
defective parts replaced immediately.  The heater
must be retested by properly qualified ser vice
personnel before placing the heater back into use.

18.

Do not exceed input rating stamped on the dataplate
of the heater.  Do not exceed the burner manifold
pressure stated on the dataplate.  Do not use an
orifice size different than specified for the specific
input rating of this heater, fuel type configuration and
altitude.

1.

The air discharge diverter duct provides improved
directional air flow and greater heat throw, beneficial
in heating long houses.  Use the duct only  on indoor
mounted heaters.  Do not use the diverter when the
heater is mounted outside the greenhouse. The
diverter duct requires hand forming prior to assembly.
Make 90 degree bends utilizing the perforations
provided.  Assemble as shown in Fig. 1.

.

FIG. 1

2.

Remove the upper and lower screws at both sides of
the blower outlet, and the two screws at outlet top.

3.

Install flanges as shown in Fig. 2, using the same
screws. Tighten the screws securely.

4.

Position the diverter over the flanges. Align holes in
diverter to flange holes and to vacant holes at top
and bottom of blower outlet. 

5.

Fasten the diverter to the flanges with the screws
provided.  See Fig. 3.

FIG. 2

FIG. 3

AIR DISCHARGE DIVERTER DUCT

Part Number 26025 (Accessory)

UPPER
SCREW

LOWER
SCREW

SCREWS REMOVED AT OUTLET TOP

PERFORATIONS

PERFORATIONS

VANES
MUST BE
DIRECTED 
DOWNWARD

SCREWS
FROM KIT

8

Содержание Therma Grow HW220

Страница 1: ...row Greenhouse Heaters View this manual online at www lbwhite com ATTENTION ALL USERS This heater has been tested and evaluated by C S A International in accordance with Canadian Gas Association Stand...

Страница 2: ......

Страница 3: ...ents paint thinner dust particles or unknown chemicals Failure to follow these instructions may result in a fire or explosion Fire or explosions can lead to property damage personal injury or loss of...

Страница 4: ...y questions about the use of the equipment or its application The L B White Co Inc has a policy of continuous product improvement It reserves the right to change specifications and design without noti...

Страница 5: ...cally operated and electrically interlocked with the heater to prevent heater operation if air inlet and exhaust outlet do not open when heating is required Model Indoor Mounting Air Exchange Requirem...

Страница 6: ...fore you return Properly trained service people must repair the leak check for further leakages and then relight the appliance for you WARNING Do not use this heater for heating human living quarters...

Страница 7: ...te this heater with any safety device that has been bypassed Do not operate this heater unless all of these features are fully functioning 6 Do not operate the heater with its door open or panel remov...

Страница 8: ...range specified on the dataplate at all times Contact your gas supplier or the L B White Co Inc if you have any questions 5 The heater s gas regulator with pressure relief valve should be installed ou...

Страница 9: ...ure you know how to shut off the gas supply to the building and also to the individual heater Contact your fuel gas supplier if you have any questions 17 Any defects found in performing any of the ser...

Страница 10: ...rovided in the duct kit Ensure the motorized air inlet and the heater s air inlet are kept free of any blockages FIG 4a Blower Outlet View FIG 4c Side View FIG 4d Alternate Air Inlet Locations ENG BYN...

Страница 11: ...IG 6 2 Assemble eyebolts and chain according to the illustration and tighten all eyebolts securely FIG 7 3 Ensure the heater is securely fastened to overhead supports and is hanging level Check crossw...

Страница 12: ...ent position the heater fan operates continuously In the vent mode the heater then supplements or provides air circulation within the greenhouse This heat vent capability can be controlled by a buildi...

Страница 13: ...GREEN BROWN BROWN YELLOW YELLOW GAS CONTROL VALVE GROUND RED BLACK WHITE GREEN HI LO C BUILDING CONTROLLER HEAT CONTACT TO CONTROL FROM CONTROL LEAVE WIRE NUT ON LEAD HIGH LIMIT SWITCH GAS CONTROL VAL...

Страница 14: ...s view is to show general assembly of the components only The regulator must always be mounted so its vent regardless of location on the regulator is always pointed downward 3 Tighten all connections...

Страница 15: ...art again and shortly thereafter ignition will occur NOTE It is normal for air to be trapped in the gas hose on new installations The heater may attempt more than one trial for ignition before the air...

Страница 16: ...ther flammable vapors and liquids 2 Have your gas supplier check all gas piping annually for leaks or restrictions in gas lines 3 Regulators must be periodically inspected to make sure the regulator v...

Страница 17: ...air or a soft dry rag Do not use files drills broaches etc to clean the orifice Doing so may enlarge the hole causing combustion or ignition problems Replace the orifice if it cannot be cleaned proper...

Страница 18: ...icates the contacts of the switch have opened 4 Allow the switch cool down for about a minute before firmly pressing the red reset button on the switch 5 Check for electrical continuity across the swi...

Страница 19: ...e inlet pressure is correct but the burner manifold pressure does not agree with that specified on the dataplate then the HI and LO heat output feature of the gas control valve requires adjustment 5 T...

Страница 20: ...d shield 3 Ensure the igniter is located so the its lip on back side of igniter is resting on the edge of the mounting bracket and the mounting hole in the igniter aligns with the mounting hole in the...

Страница 21: ...ermostat Thermostat closes and returns 24 volts to terminal W on ignition control Red light on ignition control is illuminated Ignition control sends flame sense current to flame sensor Ignition contr...

Страница 22: ...ed to power supply Check breakers Is proper voltage delivered to selector switch Check all wiring for defects Repair or repalce if needed Yes Does selector switch send voltage to the transformer Check...

Страница 23: ...f ignition is not achieved after the third trial the heater will lock out and the ignition control module will present the three time flash pattern Either recycle the heater or wait for heater to atte...

Страница 24: ...sary No Is fan wheel plugged with dirt Is there an obstruction in blower outlet preventing air proving switch closure No Are 115 volts sent from ignition control terminal IND to motor relay No If impr...

Страница 25: ...e and component Repair or replace as necessary or replace ignition control Provide proper pressure to heater and check with a gauge Check for voltage to switch Check wiring and repair if defective If...

Страница 26: ...mbly and housing Repair or replace as necessary Yes Reconnect wires to capacitor Defective capacitor Replace the motor No Yes Are wires disconnected from capacitor No Five Times Rapid On Off cycling o...

Страница 27: ...26 Electrical Connection and Ladder Diagram 115 Volt Supply...

Страница 28: ...27 230 Volt Supply TRANSFORMER 24 VOLT 120 VOLT...

Страница 29: ...box within the appliance that provides an area where burner flame mixes with combustion air thereby providing heat High Limit Switch Safety device wired into the control system which is used to break...

Страница 30: ...Parts Identification PARTS SCHEMATIC 29 39 40 41 26 38 25 21 29 27 31 37 36 35 34 33 14 13 15 18 20 19 16 17 6 7 8 9 10 11 12 4 3 2 1 5 28 24 23 22 32 30...

Страница 31: ...9 19 Flame Sensor 520139 20 High Limit Switch LP Gas 572501 Natural Gas 505566 21 Heat Chamber LP Gas 572499 Natural Gas 572500 22 Boot Selector Switch 571939 23 Selector Switch w Boot 571906 24 Contr...

Страница 32: ...of the equipment and in any event L B White s liability in connection with the equipment including for claims based on negligence or strict liability is limited to the purchase price Some states do no...

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