INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
TECHNICAL SPECIFICATIONS
Power Supply: 20-28 VAC / 2 VA
Relay Capacity: 24 VAC / 48 VA
Sensor: 1005 Ohms at 70° F
(accurate up to 500’ with 18 gauge wire)
*See “RTD Sensor Troubleshooting” in
Section X for more information.
ADJUSTMENTS
Reset Ratio: 0.5-1.5
Max. Temp: 150°-210°
Differential: 5°-15°
Mounting Instructions
Mount the Argo DPM-2 Control vertically on a solid wall or
partition� For your convenience it is recommended that the
control be mounted as close as possible to the device being
controlled, however it should never be mounted more then
75 feet away� Select a location that is easily accessible for
installation and service�
NOTE: To reduce the possible transformer hum and relay
noise that is sometimes amplified by mounting surfaces
such as sheet metal, plasterboard, and similar materials,
place rubber or felt washers between the case and the
mounting surface�
1.
Position the control and mark the mounting holes�
2.
Start screws (not provided) for the keyhole type
mounting holes in the upper corner(s)� Tighten the
screws down to about ⅛” (3mm) from the surface.
3.
Hang the control on the screw(s), position the case,
and start the bottom screws�
4.
Tighten all screws�
Outdoor Sensor Installation
It is important
to install outdoor sensor (provided with
DPM-2) on the north side or shaded side of building� Locate
minimum of 10 feet above grade and not near any location
where internal heat could affect the sensor rating, such as
window, doors, exhaust vents or fans. See figure below.
Water Supply Sensor Installation
Install supply water sensor on common header within 5 feet
of supply water tapping in the boiler. See figure below.
5
PN 240005132 Rev. D [11/15/2021]