INTERMATIC FM1 Series Time Switches Instruction Manual
- June 12, 2024
- Intermatic
Table of Contents
INTERMATIC FM1 Series Time Switches
Product Information
The FM/1 Series Time Switches are versatile devices designed for controlling various electrical loads. They come in two types: synchronous and quartz. The synchronous time switches operate on supply voltages of 24, 120, and 240VAC at a frequency of 60Hz. On the other hand, the quartz time switches operate on supply voltages of 24V AC/DC, 120, and 240VAC at a frequency of 50/60Hz.
The switch type used in these time switches is Single Pole Double Throw (SPDT). They have a switch rating of 21A at 250VAC for resistive loads, 1350 watts for tungsten loads, 1HP at 125VAC, and 2HP at 240VAC. The ambient temperature range for these time switches is not specified in the provided information.
The FM/1 Series Time Switches feature terminals with 1/4 spade connections for easy wiring. The quartz units have a reserve carryover of 7 days. These time switches weigh approximately 3 oz and are UL Recognized.
These time switches have various applications such as controlling heating, ventilation, air conditioning, refrigeration, lighting, security systems, circulating pumps, and spas. They can be used for any electrical load that requires scheduling for 24 hours or 7 days.
For mounting options, the standard FM/1 units can be flush-mounted or surface mounted inside a panel. A printed circuit board mounting base is available, and there are indoor and outdoor enclosures for stand-alone mounting. Additionally, a DIN housing option is available for flush or surface mounting.
Product Usage Instructions
Wiring
Before wiring the time switch, verify the input voltage stated on the back
of the unit. Use 1/4 quick connects and make connections according to the
provided wiring diagram and applicable code requirements. When using 24V
units, ensure that transformers are used to supply the required 24 volts AC to
terminals 1 and 2.
Terminal Connections
The terminal connections are as follows:
M
5
4
3
2
1
NC
NO COM
INPUTThe contacts shown in the Off position (trippers pushed inward) will close contacts 3 and 4 when in the On position (trippers pushed outward).
Mounting
The FM/1 time switches can be flush mounted using a mounting kit with screws
or surface mounted inside a panel. A printed circuit board mounting base is
also available. Stand-alone mounting can be done using an indoor or outdoor
enclosure. DIN housing options are available for flush or surface mounting.
Programming with Manual Override Switch
Automatic Mode
In order to operate the time switch module in the automatic mode, ensure that
the manual switch is in the center position (automatic).
Manual Mode
The selected programs can be overridden using the manual switch selector
lever. In the lower position marked O, terminals 3 and 5 are permanently
closed. In the upper position marked I, terminals 3 and 4 are permanently
closed.
Time Setting
To set the current time (and day of the week on 7-day units), turn the minute
hand clockwise. Do not set the time by rotating the outer dial.
For a 7-day program dial, align the day of the week and the time of day on the outer dial with the triangle marker on the inner dial (two o’clock position).
For example, to set Monday 10:30 AM, turn the minute hand clockwise until Monday 10:30 AM aligns with the triangle on the inner dial. The hour and minute hands will show exactly 10:30.
For a 24-hour program dial, align the time of day on the outer dial with the triangle marker on the inner dial.
For example, to set 10:30 AM, turn the minute hand clockwise until 10:30 AM aligns with the triangle on the inner dial. The hour and minute hands will show exactly 10:30.
Programming
The 7-Day models of these time switches have a weekly program dial that
reflects the seven days of the week with AM/PM imprints for each day.
To program the time switch, push the captive trippers to the outer ring
position for the entire period that the load should be turned ON. Each tripper
represents two hours on the 7-Day dial.
When a tripper is pushed to the inside, the switch is in the OFF position.
FM/1 Series
Time Switches
TECHNICAL DATA
-
Supply Voltage: Synchronous: 24, 120 and 240VAC, 60Hz
Quartz: 24V AC/DC, 120 and 240VAC 50/60 Hz -
Switch Type: SPDT
-
Switch Rating: 21A @ 250VAC resistive
1350 watt tungsten
1HP @ 125VAC
2HP @ 240VAC -
Ambient Temp. Range: –40°F to 180°F, synchronous units
–20°F to 140°F, quartz units -
Terminals: 1/4” spade terminals
-
Reserve Carryover: 7 days for quartz units
-
Weight: Approximately 3 oz.
-
Agency Approvals: UL Recognized
NOTE: 24V quartz unit will operate on 6VDC, 12VDC, or 24VDC
APPLICATIONS
The FM/1 series of time switches are designed for control of heating,
ventilating, air conditioning, refrigeration, lighting, security, circulating
pumps, spas or any electrical load requiring 24-hour or 7-day scheduling.
WIRING
Verify input voltage stated on back of unit. Use 1/4” quick connects and make connections in accordance with the wiring diagram shown and applicable code requirements. When using 24V units, it is important to use transformers that will supply the required 24 volts AC to terminals 1 & 2.
Terminal Connections
Contacts shown in “Off” position (trippers pushed inward)
“On” position (trippers pushed outward) will close contacts 3 & 4
MOUNTING
The standard FM/1 units can be flush mounted (mounting kit with screws
available) or surface mounted inside a panel.
A printed circuit board mounting base is also available.
An indoor or outdoor enclosure is available for stand-alone mounting. In
addition, unit is also available in DIN housing for flush or surface mounting
(see MIL72, Digi 20 or Digi 42 data sheets). Optional clear plastic dust cover
is available.
TIME SETTING
TO SET THE CURRENT TIME (AND DAY OF WEEK ON 7 DAY UNITS), TURN THE MINUTE HAND
CLOCKWISE. DO NOT SET THE TIME BY ROTATING “OUTER” DIAL.
Turn the minute hand clockwise until the day of the week (7-day timer) and the
time of day on the outer dial is aligned with the triangle marker on the inner
dial (two o’clock position).
Example for 7-day program dial Monday 10:30 AM. Turn the minute hand clockwise
until Monday 10:30 AM is aligned with the triangle on the inner dial. The hour
and minute hand will show exactly 10:30.
Example for 24-hour program dial 10:30 AM. Turn the minute hand clockwise
until 10:30 AM is aligned with the triangle on the inner dial. The hour and
the minute dial will show exactly 10:30.
PROGRAMMING
7-Day (SW, QRW Models)
The weekly program dial reflects the seven days of the week and AM/PM imprints
for each day.
The time switch is programmed by pushing the captive trippers to the outer
ring position for the entire period that the load is to be turned “ON”, i.e.,
two hours for each tripper on the 7-Day dial. When the tripper is pushed to
the inside, the switch is in the “OFF” position.
24-Hour (ST, QRT Models)
The 24-Hour dial has quarter-hour divisions and AM/PM indications.
The time switch is programmed by pushing the captive trippers to the outer
ring position for the entire period that the load is to be turned “ON”, i.e.,
fifteen minutes for each tripper on the 24-Hour dial. When the tripper is
pushed to the inside, the switch is in the “OFF” position.
PROGRAMMING WITH MANUAL OVERRIDE SWITCH
AUTOMATIC MODE
In order to operate the time switch module in the automatic mode, the manual
switch must be in the center position (automatic)
see diagram.
MANUAL MODE
With the manual switch selector lever the selected programs can be overridden. In the lower position, marked “O”, terminals 3 and 5 are permanently closed. In the upper position,marked “I”, terminals 3 and 4 are permanently closed (see diagram).
INTERMATIC INCORPORATED
Spring Grove, IL 60081-9698
www.intermatic.com
References
Read User Manual Online (PDF format)
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