How
to wire Intermatic T104
and T103 and T101 timers
Buy additional tripper pins/
and replacement clock motors etc
T170 Series - Same features as the T100 Series plus 3 skipper options to omit operation on selected days.
T170 Series - Same features as the T100 Series plus 3 skipper options to omit operation on selected days.
T-104
Intermatic timer
T106 manual with NO NC terminals
T101 manual
T103 manual
T105 manual with NO NC terminals
How to troubleshoot Intermatic timer
Intermatic timers and manuals
Fireman's switch
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 T100 series mechanism  Enclosures |
Larger image of T-104P201
Pool timer manuals
Different color means item sold as pool timer 1 and 2. Model shown has firemans switch.
Same wiring applies to T104P201 and T104R201 and T104R3
| See another image of same wiring shown above |  |
Check label on side of water heater for Volts & Watts
T104 clock motor is 240 Volt and does not need neutral wire. If circuit has neutral wire, then connect to pole A.
This timer can be used for 120V circuit, see below
T104 is DPST [double-pole single-throw].
Hot leads from breaker connect to poles 1 and 3.
Load wires connect to poles 2 and 4.
Water heater has no electricity when timer is off.
At water heater, connect black-to-black and white-to-red.
T104 manual
T104 & T103 & T101 at Intermatic
T-104R201 Raintight for 240 Volt water heaters at Grainger
T-104 for 240 Volt water heaters at Electric Supply
T-104 at aplussupply
| T100 series repair parts |
440Volt/ 277Volt timer
Larger image
Wire T104 for 277Volts
Move motor leads to terminals A and 1
Put Neutral wire on terminal A
How to install 3-phase timer
1) Control 120Volt Load using T-104
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2) Control 2 - 120 Volt Loads |
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3) Rewire timer |
4) Rewire timer + change clock motor
to WG1570 120V |
Use ordinary tester. Power is on. Tape tester leads to wood sticks to keep hands away from power.
Test each wire to bare ground wire. Tester lights up on Hot wire(s).
If circuit is 120V, then there is 1 Hot wire.
If circuit is 240V, then there are 2 Hot wires
Hot wires come from breaker box.
See basic water heater circuit
Stand on dry surface when testing live wires.Do not stand on bare ground or touch any metal.
Stand on 2x4s. Tape tester leads to wood sticks.
| These are same timer, with same Load rating and same wiring. Same timing mechanism, same clock motor, same trippers. Each with slightly different features | |||
 WH40 Override on outside of enclosure |  T104 indoor T104R outdoor Shown above |  T174 with day skipper T173 wires same as T103 T171 wires same as T101 | Pool timers T104P201 plastic outdoor enclosure T104201 metal outdoor enclosure |
T-101
Intermatic timer
Fireman's switch
See detail below
T-101 timer has 120V clock.
Lift and rotate dial to set current time.
T-101R has 120 V clock motor
"R" is for raintight
Same wiring applies to T101P201 and T101P and T101P3 and T101R201
T-101 clock motor is 120V
This timer will not work on 240V circuits.
T-101 is SPST [single-pole single-throw]
Black Hot wire must connect to pole 1.
Neutral must go to pole A
Black to Load goes to pole 2
White to Load goes to pole A
At water heater, connect black-to-black and white-to-white.
T101 manual
How to operate and set T101 timer
T-101 at aplussupply
T-101R for 120 Volt heaters at Lowes
T-101 at Amazon
T-101 wiring illustration larger: same diagram shown on left
| Wire
T101 for 240Volt Method 1: change motor to 240Volt Larger image |
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| Wire
T101 for 240V Method 2: Wire timer for 240Volt Larger image |
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T-101 timer wiring
Replace 120volt WG1570 clock motor with WG1573 clock motor. Connect new clock to same terminals A and 1.
240V: L1 Hot from breaker connects to terminal A; L2 Hot from breaker connects to terminal 1
240Volt wires going to Load connect to terminals A and 2.
T-103
Intermatic timer
Larger image
Intermatic T-103 wired for 120V circuit
T-103 has 120V clock motor
Intermatic T103 timer can be wired to control 120 Volt circuit -or- 240 Volt circuit
The key is that the T-103 has 120 Volt clock motor and a white Neutral is always connected at pole A
T-103 manual
How to operate and set T103 timer
Buy T-103 at Grainger
T103 at Amazon
Illustration: T-103 wiring for
1 - 120V load
Illustration: T-103 wiring for
2 - 120V loads
T-103 has 120V clock motor that requires Neutral wire connected at pole A
Generally,
240Volt wire with Neutral will be 10-3 wire. Black and Red are
Hot. White is Neutral. Bare wire is ground |
240Volt/ fireman switch T104P201 instruction manual T104R201 instruction manual |
 240Volt T104R3 manual/ same at T104 timer manual |
 120Volt T101R3 manual/ same as T101 timer manual |
 120Volt/ fireman switch T101R201 manual T101P201 manual |
Wiring same shown on this page except for fireman's switch.
Same clock motors.
Same wiring terminals.
Same 40 amp load rating.
Beige-colored enclosures.
P series enclosure= plastic
R series enclosure= metal
120 Volts x 15 Amp = 1800 Watts x 80% = 1440 Watts
12 gauge wire
120 Volts x 20 Amps = 2400 Watts x 80% = 1920 Watts
10 gauge wire
120 Volts x 30 Amps = 3600 Watts x 80% = 2880 Watts
240 Volts x 30 Amps = 7200 Watts x 80% = 5760 Watts
See basic water heater circuit
