Argo ARM Series Instruction manual

ARM SERIES
Switching Relays
With Priority
INSTALLATION, OPER ATION &
MAINTENANCE MANUAL
Models
ARM-2P
ARM-3P
ARM-4P
ARM-6P
AD-1
AD-4
AD-1
AD-4
ARM-2P
ARM-3P
ARM-4P
ARM-6P
Manufactured by:
ECR International Inc.
2201 Dwyer Avenue, Utica, NY 13501
Tel. [phone]
www.ecrinternational.com
PN 240005129 REV. C [03/01/2018]

2PN 240005129 Rev. C [03/01/2018]
Safety Symbols and Warnings ..........................................................................................3
Introduction...................................................................................................................3
Product Features ............................................................................................................4
Mounting Instructions .....................................................................................................5
Electrical Specications & wiring .......................................................................................5
Sequence of Operation ....................................................................................................6
ARM-4P Wiring Schematic................................................................................................7
ARM “Cold Start” Applications ..........................................................................................8
ARM “Tankless Coil” Applications..................................................................................... 11
ARM With AD Expansion Modules .................................................................................... 13
ARM To Field Replacement Transformer............................................................................ 14
ARM With DPM-2 Outdoor Reset Control ......................................................................... 15
ARM With Power Robbing Thermostat .............................................................................. 16
Replacement Parts........................................................................................................ 17
Technical Support ......................................................................................................... 17
IMPORTANT: Read and understand the following instructions COMPLETELY before installing!!
Keep this manual near boiler
Retain for future reference
TABLE OF CONTENTS
Information and specications outlined in this manual in effect at the
time of printing of this manual. ECR International reserves the right to
discontinue, change specications or system design at any time without
notice and without incurring any obligation, whatsoever.

3PN 240005129 Rev. C [03/01/2018]
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
NOTICE
Used to address practices not related to personal injury.
CAUTION
Indicates a hazardous situation which, if not
avoided, could result in minor or moderate
injury.
!
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
!
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in death or serious injury
!
This is the safety alert symbol. Symbol alerts you to
potential personal injury hazards. Obey all safety messages
following this symbol to avoid possible injury or death.
Become familiar with symbols identifying potential
hazards.
WARNING
Fire, explosion, asphyxiation and electrical shock
hazard. Improper installation could result in death
or serious injury. Read this manual and understand
all requirements before beginning installation.
!Introduction
This manual is intended to familiarize the installer and
user of the Argo ARM Series Switching Relays with their
installation and operation to assure normal trouble-free
operation.
Argo Controls are designed and manufactured with quality
components for maximum life and durability and require
minimal service. To insure a satisfactory installation, it is
imperative that the instructions be followed carefully before
operating the relays. Failure to do so may result in breach
of warranty.

4PN 240005129 Rev. C [03/01/2018]
PRODUCT FEATURES
1. Powerful 30 VA transformer – will operate up to 15
zones. (ARM-2) uses 20 VA transformer.
2. Electronic fuse on transformer secondary protects
transformer from excessive loading. Automatically
resets.
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. Repeats every 30
minutes.
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
1
2
3456
7
9
810 13
12
11
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: 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
wi t h m o s t pr o g r a m m a b l e t h e r m o s t a t s .
NOTE: The 4-zone ARM-4P is featured in this manual.
The ARM2-P, ARM-3P, and ARM-6P circulator relays have
identical electrical specications. Differences in operating
features are noted in this manual.
14. ARM Series Switching Relays have a 5-year warranty,
AD Expansion Modules have 18-month warranty.

5PN 240005129 Rev. C [03/01/2018]
MOUNTING INSTRUCTIONS
Mount Argo ARM Series Switching Relays vertically on a
solid wall or partition.
Manufacturer recommends, for your convenience, that the
control be mounted as close as possible to the device to be
controlled.
The switching relay should never be mounted more than
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 amplied 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. The
AD-1 requires a screw installed in the lower left hand
corner after the control is hung and leveled.
3. Hang the control on the screw(s), position the case,
and start the bottom screws.
4. Tighten all screws.
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
General Wiring Notice
Disconnect before installing or servicing.
All primary wiring must be 14 AWG minimum. Torque
terminal screws 6 to 7 inch pounds. All wiring must be
installed in accordance with:
U.S.A. - National Electric Code and any other
national, state, or local code requirements. Wiring
must be N.E.C. Class 1.
CANADA - C.S.A. C22.1 Canadian Electrical Code
Part 1 and any other national, provincial, or local
code requirements. Wiring must be C.S.A. C22.1
C.E.C. Part 1.
Electrical Specications & Wiring
WARNING
Electrical shock hazard. Disconnect power before
installing or servicing. Failure to follow these
instructions could result in death or serious injury.
!
Electrical Specications
ARGO
Model
Number
Zones Transformer
Voltage
Relay
Switching
Action
Thermostat
Current
(amps)
Single
Phase
Motor
Rating
(Each
Circuit)
120 VAC
ARM-2P 2 120V, 60 HZ, 20VA SPST 0.085 1/3 HP
ARM-3P 3
120V, 60 HZ, 30 VA SPST 0.085 1/3 HPARM-4P 4
ARM-6P 6
AD-1 124 VAC
Supplied by ARM SPST 0.085 1/3 HP
AD-4 4

6PN 240005129 Rev. C [03/01/2018]
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
Sequence of Operation
When a zone calls for heat (circuit is closed)
1. Isolated switch coil is energized and the contact closes.
2. X-X switch is closed. (X1-X1 and X2-X2 switches
closed on ARM-2P) and X-X indicator light turns on.
3. Controller relay closed and ZC-ZR indicator light turns
on. (ARM-2P does not include ZC-ZR light). A ZC
to ZR connection is required, either factory-installed
jumper or through boiler aquastat. (ARM-2P does not
include ZC-ZR relay or terminals.) Terminals ZC-ZR are
120 VAC connections.
4. Zone circulator relay closes turning on circulator.
“Circulator On” light turns on.
If the Priority Switch is “ON” Position:
1. Zone 1 becomes priority zone.
2. When zone 1 calls for heat, priority zone is activated
and all other zones are deactivated (Circulators for
zones 2 and higher and any zone modules will not
operate). “Priority On” light turns on.
3. Built-in timer automatically shuts off priority feature
temporarily if priority zone calls for heat longer than 30
minutes allowing all zones to operate.
4. Repeats every 30 minutes until priority zone is satised.
Prevents house freeze-up in event of indirect water
heater malfunction.

7PN 240005129 Rev. C [03/01/2018]
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
WIRING SCHEMATICS

8PN 240005129 Rev. C [03/01/2018]
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
ARM “COLD START” APPLICATION
RELAY RELAY RELAY RELAY
RELAY
RELAY
Factory installed jumper between ZC and ZR.
Each zone thermostat will signal the ARM control to operate
its zone circulator and start the boiler through the XX
isolated end switch.
JUMPER
Placed between terminals ZC and ZR. (Jumper is factory-installed in
this position.) Terminals ZC-ZR are 120 VAC connections.
Connect isolated switch terminals X-X to boiler thermostat connection
(see boiler manual).
NOTICE
ARM-2 does not have ZC-ZR Terminals. ARM-2 has 2
isolated switches marked X1X1 and X2X2.

9PN 240005129 Rev. C [03/01/2018]
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
ARM “COLD START” WIRING
ARM-4P to MH L8148
ARM “COLD START” WIRING
ARM-4P to Millivolt Gas Valve

10 PN 240005129 Rev. C [03/01/2018]
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
ARM “COLD START” WIRING
ARM-4P to 24 Volt Gas Valve
RELAY
RELAY
RELAY
RELAY
RELAY
RELAY