Therma Grow™ Greenhouse Heaters
Owner’s Manual • Therma Grow™
13
WARNING
Electrical Shock Hazard
n
Disconnect the heater’s electrical supply before
interconnecting the control.
n
Failure to disconnect the electrical supply will
result in electrical shock.
n
Electrical shock will cause severe injury or death.
Hanging the Heater
As shipped, the heater is configured for mounting to an
optional mounting bracket kit, part number 500-23652,
which is installed on freestanding supports or mounted
directly to the structure’s wall. Separate installation
instructions accompany the kit.
The heater may also be suspended by chain to the
greenhouse’s overhead structure by using an optional
chain hanging kit, part number 07802. Refer to the
following instructions.and illustrations.
1. For Therma Grow 220 models, remove case top hole
plugs. See Fig. 6
FIG. 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 crosswise and
lengthwise.)
4. See Fig. 4 for
typical
indoor installation. In any
installation, consideration must be given to making
sure the heater is located away from the people en-
tering or exiting the greenhouse so they cannot ac-
cidentally knock the heater or tamper with the heater
and its gas supply line in any way. Additionally, the
heater must be located so that it does not block the
normal entryway or exit of the building. Observe and
obey minimum clearance distances to combustible
materials as stated in the specification section of this
owner’s manual and on the heater’s dataplate.
Sediment Trap Assembly
Assemble the tee, nipples and cap together and tighten
securely. See Fig. 8. The sediment trap assembly
must always be mounted in a vertical position. Make
sure pipe thread compound that is resistant to both L.P.
gas and natural gas is used in making all connections.
Check all connections for gas leaks using approved gas
leak detectors.
FIG. 8
Thermostat Installation
Single Stage Heater
1. To connect the Series Tap Plug Thermostat Kit:
a. Connect the power cord of the heater to the female
side of the plug on the end of the thermostat cord.
b. Plug the male side of the series tap plug on the ther-
mostat cord into a three-wire (grounded) electrical
outlet within the building.
CHAIN
EYE BOLT
NUT 1/4-20
FLAT WASHER
NUT 1/4-20
NIPPLE
TO GAS CONTROL
VALVE INLET
HOSE
ADAPTER
TEE
NIPPLE
CAP