8
7 A
M
Models
Non-Enclosure Mount
DTMV40-M
24-hour, Mechanism Only
DTQMV40-M
24-hour w/Battery Backup, Mechanism Only
DTMV40-P
24-hour, Panel Mount
DTMV40-B
24-hour, Bracket Mount
DTQMV40-B
24-hour w/Battery Backup, Bracket Mount
PROGRAMMING
(Synchronous and Quartz Models)
Setting the Time:
Turn the minute hand clockwise until the time of day (and AM
or PM) on the outer dial is aligned with the triangle marker on
the inner dial.
Note: All units with Battery Backup provide up to a week of
reserve carryover.
Setting Defrost Initiation Time:
Move a white tab (tripper) on the outer dial outward at each
desired initiation time. For example, to set defrost initiation
times at 6:00AM, 11:30AM, 4:30PM and 11:00PM, move the
tab adjacent to the “M” in AM on the dial (6:00AM), the tab that
lies between 11:30AM and 11:45 AM, the tab between 4:30PM
and 4:45PM, and the tab adjacent to the 11:00–11:15PM
marks. (See note for 8243/6243 replacement.)
Setting Maximum Defrost Duration:
Different defrost durations may be set for each defrost initiation
setting. Each white tab (tripper) provides a 15 minute interval.
The tabs that set the initiation time provide a minimum of 15 min-
utes of defrost. For longer defrost duration, move additional tabs
(following in time) from the initiation tab. For example, if a 45
minute defrost is to start at 7:00AM, move the tab outward that
lies between 7:00 and 7:15 on the AM side of the dial, and the
tabs adjacent to 7:15-7:30 and 7:30-7:45.
(3 tabs moved outward). The defrost will
initiate at 7:00AM and time terminate at
7:45AM (if temperature termination does
not occur first.)
For electronic models, refer to sepa-
rate programming instructions.
DO NOT ROTATE MINUTE HAND COUNTER-CLOCKWISE
Model Designation
Models
Enclosure Mount
DTMV40
24-hour, Outdoor UL TYPE 3R Enclosure
DTQMV40
24-hour w/Battery Backup,
Outdoor UL TYPE 3R Enclosure
DTMV40-IM
24-hour, Indoor Metal UL TYPE 1 Enclosure
Note: It is necessary to apply power across terminals 1&N
in order to perform electrical test.
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Summary of Contents for DTMV40 Series
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