Product Overview

COMPONENT
C-56
®
The largest selection of motors, components, and accessories for the HVAC/R Industry
Klixon Fan & Limit Switches
MARS SERIES 390
39004
Leads thru side
39005
Leads thru top
1/2” conduit adapter
Specifications:
Pipe size: 5/8 in O.D.
Leads: 12 in. color coded
Switch Action: SPDT
Temperature: 88°F (31°C)—terminals 1 & 2 close, 1 & 3
open 73°F (23°C)—terminals 1 & 3 close, 1 & 2 open
Mounting: mounting clip supplied with each kit
Electrical: terminals 1 & 3 25 amp at 120/240 VAC
Terminals 1 & 2 10 amp at 120 VAC, 5 amp at 240 VAC
Change-Over Switches for
Fan-Coil Systems
The MARS Series 390 change-over switches are used for
summer-winter change-over of electric thermo-stats in hydronic
heating - cooling fan-coil units.
Features:
• Color coded leads allow easy installation
• SL-8 thermostat is enclosed in sealed case for
trouble-free operation
• Snap-acting disc type, insures accurate
temperature repeatability
• Can be mounted in any position
• UL and CSA listings available
Installation
The SL-8 change-over switch is located on the main run of the
supply line where it can quickly sense the maximum
temperature of the hot or cold water passing through. If the SL-
8 switch is exposed to surrounding temperatures, thermal
insulation should be wrapped around the switch case to
maintain desired thermal response.
39004 SL8-5 20425D27-160-356 leads thru
side of cup
39005 SL8-5A 20425D69-160-287 leads thru top
of cup with 1/2”
conduit adapter
MARS KLIXON KLIXON
NO. KIT NO. NO. DESCRIPTION
Cross Reference
WHITE
HONEYWELL MARS RODGERS MARS
NO. REPLACEMENT NO. REPLACEMENT
L6076A 39004 752-1 39004
L6076B 39005 752-2 39005
FAN COIL UNIT
HEATING
SIDE
LINE VOLTAGE
OPERATION
GND
LINE HOT
ROOM
THERMOSTAT
COOLING
SIDE
RETURN LINE
MOTORIZED VALVE
SUPPLY LINE

HOT OR COLD WATER
SL-8 CHANGE-OVER
SWITCH
➀
➁
➂
➀
➁
➂
ORANGE COMMON
BLUE HEAT
RED COOL
LOW VOLTAGE
TRANSFORMER
LINE
TO ROOM
THERMOSTAT
TO MOTORIZED
VALVE
LOW VOLTAGE OPERATION
®