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MODE SELECTION (S1 DIP SWITCH):

First determine what model is being replaced (Intermatic or Competitors).

The mode selector DIP switch (located at lower right side of the board)

determines the conﬁguration of terminals 2 & 4. In position “ ”, the ter-A

minals are normally closed, and will open during a defrost. In position “B”,

terminals 2 & 4 are normally open, and will close during a defrost. Select

proper position from table below and wiring diagrams indicated.

To select mode simply slide the switch as follows:

Mode A - position switch up;

Mode B - position switch down;

Note: When Mode “B” is selected the

DTAV40 will operate as follows:

Refrigeration Mode - Red & Green LEDs

will turn OFF (1 & 3 and 2 & 4 break while

1 & F make)

RED & GREEN LEDs will turn Defrost Mode -

ON (1 & 3 and 2 & 4 make while 1 & F break)

Installation &

Operating Instructions

TImer Mechanism

Figure 2

2-1/2"

6-1/8"

Ground Lug

INSTALLATION

1. Open door and then remove interior protective cover by releasing

spring latch on bottom (Figure 1). Cover ﬂexes out easily on Type 1

metallic case (Figure 4).

2. Apply corresponding Terminal Identiﬁcation and Door labels-see

retroﬁt kit instructions.

3. Remove timer mechanism by releasing PCB Latch on bottom

(Figure 1). Timer Mechanism comes detached in TYPE-1 Metallic

Enclosure (Figure 4).

4. Select knockouts to be used. Remove inner 1/2" knockout by

inserting a screwdriver in the slot and carefully punch knockout

loose. Remove slug. If 3/4" knockout is required, remove the outer

ring with pliers after removing the 1/2" knockout. Smooth edges

with knife if necessary, on plastic enclosure only.

5. Place enclosure in desired mounting location and mark the three

mounting holes (refer to Figure 2 for Type 3R and Figure 3 for

Type 1 below). Start by installing top screw into mounting surface

and hanging enclosure on screw head through keyhole; then screw

in remaining two screws in bottom holes.

6. Grounding: Terminate all ground wires to ground lug on bottom of

enclosure.

7. Re-install timer in enclosure.

8. Replace interior protective cover.

PCB Latch

Interior

Protective

Cover

Timer Mechanism

Spring Latch

Paragon Precision

TIME INITIATED, TIME TERMINATED

Intermatic

Mode Selection Wiring Diag.

TIME INITIATED, PRESSURE TERMINATED

(Separate Pressure Switch Required (see instructions)

TIME INITIATED, REMOTE TEMPERATURE OR

PRESSURE TERMINATED

Cross Ref.

DTAV replaces over 40 models.

Set Mode Selection (See S1 DIP Switch, table and instructions below).

Figure 4

7 ¾"

Type 1 Enclosure

Figure 3

PCB Latch

Interior

Protective Cover

UL TYPE 3R ENCLOSURE

Mode Selection Switch (S1)

SEE SEPARATE BRACKET

REPLACEMENT NOTICE

IN PACKAGE

UL TYPE 1 ENCLOSURE

BRACKET MOUNT

(Saleable item DT-B)

Type 1 Enclosure

Type 3R Enclosure Type 3R Enclosure

Figure 1

2-1/2"

4-1/16"

SPECIFICATIONS:

Maximum Contact Switch Rating:

40A Resistive @ 120-240VAC

2HP @ 240VAC; 1HP @ 120VAC

WIRING CONNECTIONS:

Screw box lug terminals. Up to one #8AWG Wire

ENVIRONMENTAL RATINGS:

Operating Temperature Range: -40˚F to 104˚F (-40˚C to 40˚C)

Operating Temperature Range: (Q-Models) -4˚F to 104˚F

(-20˚C to 40˚C)

Operating Humidity: 0 - 95% RH,

non-condensing

ELECTRICAL LIFE:

50,000 Operations at Full Load

DIMENSIONS:

8.795" x 6.631" x 2.935" (H x W x D)

SHIPPING WEIGHT: 3 lbs.

AGENCY APPROVALS: UL LISTED

Risk of Damage to Timer

• Rotate timer dial clockwise only.

• Do not move the clock hands on the timer. Moving the clock hands can damage the timer.

NOTICE

• Disconnect power at the circuit breaker(s) or disconnect switch(es) before installing or servicing.

• More than one circuit breaker or disconnect switch may be required to de-energize the equipment before

servicing.

• Installation and/or wiring must be in accordance with national and local electrical code requirements.

• For 40 amp loads, use #8 AWG wire, rated 90 C min.°

• Bonding between conduit connections is not automatic and must be provided as part of the installation.

• When replacing a timer with a metal bracket, replace the bracket with a non-metallic bracket. (Intermatic

Model DT-B is recommended).

• For outdoor locations, raintight, or wet location, conduit hubs that comply with requirements of UL514B

(standard for ﬁttings for conduit and outlet boxes) are to be used.

WARNING Risk of Fire or Electric Shock

DTAV40 Series Time Initiated, Temperature, Pressure or

Time Terminated Auto-Voltage 40A Defrost Timers

In Refrigeration Mode

Arrow on timer points to current time.

L1 L2/N

F 3 1 2 4 XN

“Green” LED ON

Trippers are “IN”

Indicates

Refrigeration

“1 & F” Make

“1 & 3” Break “2 & 4” Make

In Defrost Mode

Arrow on timer points to current time.

L1 L2/N

F3 1 2 4 X

“Red” LED ON

“1 & F” Break

“1 & 3” Make “2 & 4” Break

In Refrigeration Mode

Arrow on timer points to current time.

L1 L2/N

F3 1 2 4 XN

Both LED’s OFF

Both LED’s ON

“1 & F” Make

“1 & 3” Break “2 & 4” Break

In Defrost Mode

Arrow on timer points to current time.

L1 L2/N

F 3 1 2 4 XN

“1 & F” Break

“1 & 3” Make “2 & 4” Make

Trippers are “OUT”

Indicates

Defrost

Trippers are “IN”

Indicates

Refrigeration

Trippers are “OUT”

Indicates

Defrost

Note: It is necessary to apply power across terminals 1&N

in order to perform electrical test.

CONTROL

POWER

TERMINATE

INPUT

CONTROL

POWER

TERMINATE

INPUT

CONTROL

POWER

TERMINATE

INPUT

CONTROL

POWER

TERMINATE

INPUT

PROGRAMMING SYNCHRONOUS AND QUARTZ

MODELS

Follow the instructions in the sections below to program the

DTAV40 Timer.

Setting the Time of Day:

Rotate the timer dial clockwise to align the triangle on the

inner dial with the desired time. The triangle represents the

current time on the timer.

NOTE: The AM and PM locations on the wheel represent 6

AM and 6 PM. For example, if the triangle points to the 7

after PM, then the current time is 7 PM. If the triangle

points to the 5 before PM, then the current time is 5 AM.

DO NOT ROTATE MINUTE HAND COUNTER-CLOCKWISE

Setting Defrost Times:

Follow this procedure to conﬁgure defrost times.

1. On the timer wheel, choose a defrost starting time.

2. Slide the tripper upward that is directly above the desired

time. The timer will initiate a 15 minute defrost at the

conﬁgured time.

3. To increase the duration of the defrost,

slide up the trippers that are adjacent to the

starting time.

NOTE: Each tripper on the time wheel

represents 15 minutes. For example, to set a 45-minute

defrost, slide the two trippers adjacent to the starting time.

NOTE: The AM and PM locations on the wheel represent 6

AM and 6 PM.

4. Repeat steps 1 through 3 as necessary to conﬁgure

multiple defrost times for a given day.

APPLICATION

The DTAV40 Defrost Timer is equivalent in function, terminal identiﬁcation

(with appropriate terminal block label attached), and wiring to the Paragon

8140 and Precision 6140 series Defrost Timers. The DTAV40 may also be

used to replace Paragon 8040 and Precision 6040 series time terminated

defrost timers. With the addition of a remote pressure switch, the DTAV40 can

replace the Paragon 8240 series pressure terminated defrost timers.

Defrosts will be initiated by programming the timer, which will accept from 1

to over 24 defrost initiation settings per day at 15 minute intervals (8:00 AM,

8:15 AM, 8:30 AM, etc)

Defrost duration is settable in 15 minute intervals from a minimum of 15

minutes up to several hours. The determines the defrost duration termination

time. In standard conﬁguration, the contacts between terminals 1 and 3 are

normally open and closed during a defrost to energize defrost heaters; the

contacts between terminals 2 and 4 are normally closed with S1 in “A”

position and open during a defrost to de-energize refrigeration and fans.

DTAV40 Time Initiated, Remote Temperature,

Pressure or Time Terminated:

Used in electric or hot gas defrost applications where the defrost is

terminated when the coil is frost free, as sensed by a temperature or

pressure switch, even though the defrost programmed termination time

has not been reached. The functions as a fail-safe and will time termination

terminate the defrost if the temperature or pressure switch fails to do so. The

temperature or pressure switch on the refrigeration coil has contacts which

close on a temperature or pressure rise above freezing, indicating

that frost and ice have melted from the coil. Typically a wide differential

SPDT temperature switch is used with it’s normally closed contacts wired to

the fans thereby delaying the fans from coming on until the coil temperature

has dropped back to below freezing. In most applications, the contacts at

terminals 2 and 4 are normally closed with S1 in “A” position and control the

fans and refrigeration equipment or compressor. For hot gas defrost, or for

double pole switching, contacts 2 and 4 may be conﬁgured as normally open

by selecting mode “B”. Refer to wiring diagrams 1 thru 10 for

additional detail.

DTAV40 TRIPPERS

MODE A

DTAV40 TRIPPERS

MODE B

8141 Replacement

Mode A with 8141

Terminal Block Label Applied

TERMINATION

THERMOSTAT

W/FAN DELAY

24 XN

8143 Replacement

Mode B with 8143

Terminal Block Label Applied

8143

LABEL

LINE

CONNECT ACROSS

COMPRESSOR

THERMOSTAT

FAN

HOT

GAS

VALVE

TERMINATION

THERMOSTAT

2 X

8143 Replacement–Double Pole Switching

Mode B with 8143 Terminal Block Label Applied

8143

LABEL

DEFROST

HEATER

LINE

SOLENOID

VALVE

CONTACTOR

1 4N

DTAV40 - TYPICAL WIRING DIAGRAMS

All switch positions are shown in refrigeration cycle operation, and change position upon initiation of a defrost.

THERMOSTAT

COMPRESSOR

SOLENOID VALVE

CONTACT OR COIL

DEFROST

HEATER

124 X

8041 Replacement

Mode A with 8041

Terminal Block Label Applied

8041

LABEL

LINE

FAN

2 2

8047 Replacement–Double Pole Switching

Mode B with 8047

Terminal Block Label Applied

8047

LABEL

DEFROST

HEATER

LINE

SOLENOID

VALVE

CONTACTOR

N 41

8245 Replacement

Mode A with 8245

Terminal Block Label Applied

THERMOSTAT

COMPRESSOR

SOLENOID VALVE

CONTACT OR COIL

DEFROST

HEATER

TERMINATION

THERMOSTAT

W/FAN DELAY

12 X 8141

LABEL

LINE

FAN

COMPRESSOR

SOLENOID VALVE

CONTACTOR COIL

FAN

MOTOR

DEFROST

HEATER

PRESSURE

SWITCH

1-N

LINE

THERMOSTAT

LABEL

8245

COMPRESSOR

SOLENOID VALVE

CONTACTOR COIL

FAN

MOTOR

DEFROST

HEATER

TERMINATION

THERMOSTAT

W/FAN DELAY

F3 1 2 4 XN

LINE

8145 Replacement

Mode A - No Label Required

THERMOSTAT

DEFAULT (Out of the Box)

CONTROL

POWER

TERMINATE

INPUT

CONTROL

POWER

TERMINATE

INPUT

CONTROL

POWER

TERMINATE

INPUT

CONTROL

POWER

TERMINATE

INPUT

CONTROL

POWER

TERMINATE

INPUT

CONTROL

POWER

TERMINATE

INPUT

CONTROL

POWER

TERMINATE

INPUT

8247 Replacement–Double Pole Switching

Mode B with 8247 Terminal Block Label Applied

8247

LABEL

DEFROST

HEATER

LINE

SOLENOID

VALVE

CONTACTOR

N 21 p

PRESSURE

SWITCH

8045 Replacement

Mode A with 8045

Terminal Block Label Applied

COMPRESSOR

SOLENOID VALVE

CONTACTOR COIL

FAN

MOTOR

DEFROST

HEATER

1-N

24 X

LINE

THERMOSTAT

8045

LABEL

CONTROL

POWER

TERMINATE

INPUT

THERMOSTAT

COMPRESSOR

SOLENOID VALVE

CONTACTOR COIL

DEFROST

HEATER

TERMINATION

THERMOSTAT

W/FAN

124X

120V Fan & Defrost Heater; 240V Compressor

Mode A - No Label Required

FAN

120V

240V

DELAY

CONTROL

POWER

TERMINATE

INPUT

REPLACING EXISTING DEFROST TIMERS

The DTAV40 will replace all models of Paragon 8040, 8140,8240 Series or Precision 6040, 6140 Series and all prior Intermatic Defrost Timer models.

TERMINAL IDENTIFICATION:

The standard DTAV40 terminal identiﬁcation is identical to the Paragon 8145 with the addition of the “F” terminal. Terminal identiﬁcation labels are provided for the other models to be

placed over the printed numbers on the printed circuit board. From the table above, select the proper label, apply to printed circuit board and wire per the original wiring or the wiring

diagrams indicated.

“F” TERMINAL:

The DTAV40 contains a normally closed contact between terminals 1 and F. This terminal may be used to switch the fans off during a defrost rather than terminals 2 and 4. For hot gas

defrost applications, with the mode switch set to position “B”, the fans may be connected to terminal “F”.

8143 Replacement: When replacing a Paragon 8143, wire the termination thermostat to terminal X of the DTAV40 (with the 8143 label attached), and the adjacent blank terminal. The

Paragon timers are wired to terminal X and the blank terminal. If the termination thermostat is wired to terminal N of the DTAV40 temperature termination will not occur and may result

in burnout of the DTAV40. See wiring diagrams 8 & 9.

8240 SERIES REPLACEMENT: The DTAV40 may be used to replace the Paragon 8240 series defrost timers with integral pressure termination by the addition of a remote pressure

switch wired to terminals Xp and p of the DTAV40 (with an 8240 series terminal label applied). There must be no external voltage connected to the pressure switch. Set pressure

switch cut-in to the same value as set on the Paragon defrost timer being replaced. Set cut-out 6 to 14 psi below cut-in. See wiring diagrams 10 and 3.

N 1

N 1 3

4 2 2

F 3 1 2 4 N X

F 3

1-N

2 4

N 1 3 2 4

N 1 3 2 4 X

1 N 3 4 2 X

1-N

2 4 X