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Mercoid Series
860 		Line Voltage Thermostats
Built-in thermometer, heavy duty construction
ULCSA


Heavy duty and reliable, Model 860 Line Voltage thermostat is designed for direct control of motors operating HVAC equipment in industrial environments. Hermetically sealed mercury switch resists dust, dirt, grease and moisture. Cadmium plated steel and brass mechanism resists corrosion. Set point is easily adjustable via knurled knob located on the side of the unit. Knob may be removed to prevent tampering. Contacts rated up to 17A available on special order.

PHYSICAL DATA
Temperature Limits:   -10 to 140°F
Electrical Rating:   See Chart
Deadband:   Approximately 2-4°F
Wiring Connections:   Standard - screw type terminals, explosion-proof pigtail leads for connection inside junction box
Conduit Opening:   ½" on explosion-proof model. Standard unit mounts on standard wall switch box
Set Point Adjustment:   Removable knob at side of unit
Housing:   Standard units have plastic housing. Explosion-proof units have cast aluminum housing containing electrically live parts. Thermostat mechanism is located in front of housing for better sensitivity; mechanism is covered by plastic cover
Actuation:   Liquid filled brass bellows
Installation:   Vertical
Weight:   Standard unit - 1.5 lbs. Explosion-proof unit - 4.5 lbs.

Model Number
SPDT1
Model Number
SPDT2
Operating
Range, °F
Housing
860-153-61
860153-62
860-153-63
860-153-64
860-153-65
860EH-153-61
860EH-153-62
860EH-153-63
860EH-153-64
860EH-153-65
 		860-2-61
860-2-62
860-2-63
860-2-64
860-2-65
860EH-2-61
860EH-2-62
860EH-2-63
860EH-2-64
860EH-2-65
 		25-60
38-70
56-80
65-90
80-110
25-60
38-70
56-80
65-90
80-110
 		Indoor
Indoor
Indoor
Indoor
Indoor
Explosion Proof
Explosion Proof
Explosion Proof
Explosion Proof
Explosion Proof
1 Three terminals: common, normally open, normally closed, 4A @ 120 V, 2A @ 240V, (AC or DC).
       1/8 HP @ 120/240 VAC 1Ø (Not U.L. or C.S.A. listed)

2 Two terminals: common, normally closed (opens on temperature rise). 10A @ 120V, 5A @ 240V, AC or DC.
       ¾ HP @ 120/240 VAC 1Ø ¼ HP @ 120/240 VDC. Normally open (instead of standard normally closed
        contact) is available on special order.

SUGGESTED SPECIFICATIONS
Thermostats shall have heavy duty contacts suitable for 120/240V operation. Contacts shall be hermetically sealed and mercury wetted. Units shall include integral thermometer. Enclosures shall be (indoor)(explosion0proof) type. Units shall be bellows actuated and shall have removable set point adjust knob. Units shall be Mercoid Model 860.



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