INTERMATIC BX9920 Spa Time Clock User Manual

: June 13, 2024
: Intermatic

Table of Contents

INTERMATIC BX9920 Spa Time Clock
Product Information
Product Usage Instructions
- Programming with Manual Override Switch
TECHNICAL DATA
APPLICATIONS
WIRING
Terminal Connections
MOUNTING
Dimensions
TIME SETTING
PROGRAMMING
PROGRAMMING with manual override switch
Override Mode
ABOUT COMPANY
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

INTERMATIC BX9920 Spa Time Clock

Product Information

Product Name	FM/1 Series Time Switches
Manufacturer	SpaDepot.com
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:
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.
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, the
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.

Product Usage Instructions

Wiring

Verify input voltage stated on the back of the 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

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).

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.
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 hands 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 minute hands 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.

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.

Dimensions

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).