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The thermostat must not be physically modified in any way.
The thermostat does not have any field replaceable or repairable components. Any component replacement or repair performed
in the field may void the hazardous certification ratings.
When tightly closed the cover flamepath gap must not exceed 0.0015" (0.04mm).
Stopping plugs and blanking elements shall not be used in conjunction with an adaptor or reducer.
Where adaptors and reducers without sealing rings are installed in protection by enclosure, Ex t (equipment for use in explosive
dust atmospheres), they may only be fitted into enclosures offering a minimum of five full threads engagement in accordance
with 60079-31.
Adaptors or reducers shall not be used for the direct connection of the thermostat to another enclosure.
Only one adaptor or reducer is to be used with any single cable entry on the associated equipment.
When thermostat is installed in a Class I, Division 2 area for flammable gas the wiring / sealing methods and components must
be rated for Class I, Division 1, as per local electrical codes.
This rule also applies to installations in Class II areas for combustible dust.
When thermostat is installed in a Class I, Zone 2 area for flammable gas the wiring / sealing methods and components must be
rated for Class I, Zone 1, as per local electrical codes.
This rule also applies to installations in Class II areas for combustible dust.
CAUTION: To prevent the risk of ignition of hazardous atmospheres ensure the cover is tightly closed when the circuits are
alive. Disconnect the supply before opening the enclosure.
ATTENTION! Afin de réduire les risques d'explosion dans les emplacements dangereux, s'assurer que le couvercle est bien
serré avant d'alimenter l'appareil. Avant d'ouvrir, couper l'alimentation électrique.
Thermostat is to be connected and serviced only by a qualified electrician experienced with hazardous location equipment. It is
the responsibility of the installer to verify the safety and suitability of the installation as per all electrical codes and area
regulations.
Connection may be made via glands and cable that are appropriately certified for use in the hazardous location and correctly
installed. OR
Connection may be made via rigid conduits.
For installation in North American (Canada / USA) hazloc classified areas the conduits must be sealed within 18" (457mm)
of the thermostat enclosure. The seal must be certified for use in the appropriate hazardous location and correctly installed.
All unused cable entries must be fitted with stopping plugs or blanking elements which are appropriately certified for use in the
hazardous location and correctly installed.
Electrical ratings stated in literature and on nameplates must not be exceeded.
Both an internal and external earthing point are provided. The external grounding terminal is NOT to be used as the primary
equipment ground. The interior grounding terminal is the primary equipment ground.
Upon completion of the wiring the thermostat cover is to be re-installed. The flanged surfaces on the base housing and cover
are to be free of dirt and debris. The four M8 hex bolts are to be torqued to 150 in-lbs (17 Nm).
Base housing and cover are to be assembled as such that a 0.0015" (0.04mm) feeler gauge can't be inserted between the two
flanged faces.
Any unused wires must be insulated via wire nut or similar method.
Minimum field wiring requirements are 12 AWG rated at 90
Common
Cable Entries
Base Housing Option #1
Wall Mount
Base Housing Option #2
Y-mount
Base Housing Option #3
Conduit Mount
HazlocHeaters.com
Conditions For Safe Use
Installation / Wiring
L1
L2
Heating
Normally
Equipment
Closed
Thermostat
Heating Mode
(2x) 3/4"-14 NPT
(Side Entries)
(1x) 3/4"-14 NPT
(2x) 1"-11½ NPT
(1x) 3/4"-14 NPT
(Side Entry)
(1x) 1"-11½ NPT
(Rear Entry)
o
C.
L1
L2
Common
Thermostat
Cooling Mode
Limited 36-Month Warranty
All BTX1 series of bi-metal explosion-proof thermostats are warranted
against defects in materials and workmanship under normal conditions of
use for a period of thirty-six (36) months from date of purchase based on
the following terms:
The thermostat must not be modified in any way.
The thermostat must be stored, installed and used only in accordance
with the owner's manual and attached data plate information.
The complete thermostat may be returned to our manufacturing plant
for repair or replacement (at our discretion), freight charges prepaid.
Contamination by dirt, dust, etc. or corrosion will not be considered as
defects.
This warranty shall be limited to the actual equipment involved and,
under no circumstances, shall include or extend to installation or
removal costs, or to consequential damages or losses.
2
Normally
Open
Cooling
Equipment
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