Install Instructions
6
3. Data Port terminal allows for an easy connection of the DPM-2
outdoor reset control.
4. Three second time delay for boiler shutoff.
5. 24 VAC transformer terminals – for easy connection of 3-wire
thermostats and eld replacement of transformer.
6. Clearly marked terminals with clamping plates and plenty of
room for wiring.
7. Expansion module plug-in – makes adding zone(s) easy and
economical through the use of the Argo AD-1 & AD-4 expansion
modules.
8. Priority zone safety timer – Priority feature will turn off (light off)
temporarily if priority zone calls for heat longer than 30 minutes,
allowing all zones to operate independently of each other. Re-
peats every 30 minutes.
9. Separate X-X (isolated switch) and ZC-ZR relays protect boiler
aquastat – can be used with either “cold start” or “tankless coil”
boiler application. ARM-2 controls do not have ZC-ZR terminals.
NOTE: that terminals ZC-ZR are 120VAC Connections.
10. Plug-in replaceable relays for long life. High relay load rating
– 1/3 HP. U.L./CSA listed.
11. LED lights turn on when relay contacts are closed. Makes for
easy troubleshooting by indicting relay operating status.
12. Switchable priority improves versatility.
13. Double sided printed circuit board construction 100% factory
tested. Advanced printed circuitry compatible with most pro-
grammable thermostats.
NOTE: The 4-zone ARM-4P is featured in this manual. The ARM2-P, ARM-
3P, and ARM-6P circulator relays have identical electrical specications.
Differences in operating features are noted in this manual.
14. The ARM Series Switching Relays have a 5-year warranty, while
AD Expansion Modules have an 18-month warranty.
PRODUCT FEATURES continued