5
R EPLACING EXISTING DEFROST TIMERS
The DTMV40 will replace all models of Paragon 8040,
8140, 8240 Series or Precision 6040, 6140, 6240
Series.
TERMINAL IDENTIFICATION:
The standard DTMV40 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 on page 4, select the
proper label, apply to printed circuit board, and wire per
the original wiring or the wiring diagrams indicated.
MODE SELECTION (Light Blue DIP Switch):
First determine what model is being replaced (Grasslin or
Competitors). The mode selector DIP switch (located at
lower right side of the board) determines the configura-
tion of terminals 2&4. In position “
A
”, the terminals are
normally closed (only when the timer is energized), 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 fol-
lows:
Mode
Mode
A
– position switch to left;
B
– position switch to right;
Note:
When Mode “
B
” is selected the
DTMV40 will operate as follows:
Refrigeration Mode
– RED &
GREEN LED’s will turn OFF (1&3
and 2&4 break while 1&F make)
Defrost Mode
– RED & GREEN
LED’s will turn ON (1&3 and 2&4
make while 1&F break)
8045 REPLACEMENT:
The DTMV40 with 8045 terminal ID label applied differs
from the 8045 in that terminals
1
and
N
are combined.
This means that the DTMV40 model must be the same
voltage as the defrost circuit (defrost heater, contactor
coil, or hot gas valve). If used in an application where the
defrost circuit is 120V and the refrigeration circuit is 240V,
the DTMV40 must be configured for 120V application
(RED DIP Switch Down) with 120V power connected to
1-
N
and
X.
Note 1 – (8143 Replacement):
When replacing a
Paragon 8143 or Precision 6143, wire the termina-
tion thermostat to terminal
N
of the DTMV40 and
the adjacent blank terminal. The Paragon and
Precision timers are wired to terminal
N
and the
blank terminal. If the termination thermostat is
wired to terminal
N
of the DTMV40 (with the 8143
label attached), temperature termination will not
occur and may result in burnout of the DTMV40.
See wiring diagrams 8 & 9.
8240/6240 SERIES REPLACEMENT:
The DTMV40 may
be used to replace the Paragon 8240 or Precision 6240
series defrost timers with integral pressure termination
by the addition of a remote pressure switch wired to ter-
minals
Xp
and
p
of the DTMV40 (with an 8240 series ter-
minal 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 or
Precision defrost timer being replaced. Set cut-out 6 to
14psi below cut-in. See wiring diagrams 10, 11, and 12.
Recommended Pressure Switches: Johnson/Penn P170,
Ranco 010 series, or Danfoss KP1 series. Pressure
range approximately 35-110psi, CUT-IN ON PRESSURE
RISE.
NOTE 2 – (8243 Replacement)
: When replacing a
Paragon 8243 or Precision 6243, the DTMV40
white tabs (trippers) for setting defrost time and
defrost duration must be reversed. Pull ALL tabs
outward for refrigeration. Press the tabs inward at
the desired defrost initiation times, and for desired
duration.
Please Note:
The DTMV40 replaces all prior Grasslin
defrost timer models such as DT040, DT140, DTMV, and
DTSX.
SPECIFICATIONS
Maximum Contact Switch Rating:
40A Resistive @ 120VAC, 208~240VAC
2HP @ 208~240VAC; 1HP @ 120VAC
16FLA, 90LRA @ 120VAC
12FLA, 52LRA @ 240VAC
“F” Terminal: 30A Resistive @ 120~240VAC
1HP @ 120VAC; 2HP @ 208~240VAC
Wiring Connections: Screw box lug terminals.
Up to one #8 AWG wire
Environmental Ratings:
Operating Temperature Range: –40°F to 131°F (–40°C to 55°C)
Operating Humidity: 0 - 95% RH, non-condensing
Dimensions: 8.795” x 6.631” x 2.935” (H x W x D)
Shipping Weight: 3 lbs.
Agency Approvals: UL Listed
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