argo ARM SERIES Switching Relays INSTALLATION MANUAL AND OPERATING INSTRUCTIONS With Priority ARm-2P, ARM-3P, ARM-4P, ARM-6P, AD-1, AD-4 ARM-2P AD-1 ARM-3P AD-4 ARM-4P ARM-6P ARGO (Technical Support) 2201 Dwyer Avenue Utica, NY 13501 (Corporate Sales) 85 Middle Road Dunkirk, NY 14048 www.argocontrols.com An ISO 9001-2000 Certified Company P/N 240005129, Rev.
installation manual and operating instructions TABLE OF CONTENTS Safety Symbols and Warnings........................................................4 Introduction......................................................................................5 Product Features.............................................................................5 Mounting Instructions......................................................................7 Electrical Specifications & wiring.......................................
RETAIN THIS MANUAL FOR FUTURE REFERENCE SAFETY SYMBOLS and warnings The following defined symbols are used throughout this manual to notify the reader of potential hazards of varying risk levels. ! DANGER ! Indicates an imminently hazardous situation which, if not avoided, WILL result in death or serious injury. ! WARNING ! Indicates a potentially hazardous situation which, if not avoided, COULD result in death or serious injury.
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.
product features continued 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 field 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.
MOUNTING INSTRUCTIONS Mount the Argo ARM Series Switching Relays 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 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.
Electrical specifications & Wiring ! WARNING ! Electrical shock hazard! Disconnect power before installing or servicing. Can cause severe personal injury, death, or substantial property damage if ignored. General Wiring Notice Electrical shock hazard – Disconnect before installing or servicing. Can cause severe personal injury, death or substantial property damage if ignored. All primary wiring must be 14 AWG minimum. Torque terminal screws 6 to 7 inch pounds.
Sequence of Operation When a zone calls for heat (circuit is closed) 1. The 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 the X-X indicator light turns on. 3. Controller relay closed and the ZC-ZR indicator light turns on. (ARM-2P does not include ZC-ZR light). A ZC to ZR connection is required, either by factory-installed jumper or through boiler aquastat. (ARM-2P does not include ZC-ZR relay or terminals.
wiring Schematics 10
Relay Relay Relay Relay Relay Relay arm “cold start” Application 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 To be 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).
arm “Cold start” Wiring Primary Terminals ARM-4P to MH L8148 Relay Relay Relay Class 2 Terminals Relay Relay Relay 12
arm “Cold start” Wiring ARM-4P to Millivolt Gas Valve Relay Relay Relay Relay Relay Relay 13
arm “Cold start” Wiring ARM-4P to 24 Volt Gas Valve Relay Relay Relay Relay Relay Relay 14
Relay Relay Relay Relay Relay Relay arm “tankless coil” Application Remove factory installed jumper between ZC and ZR. A tankless coil requires a boiler aquastat. Each zone thermostat will signal the ARM to start its zone circulator and send a call for heat to the boiler aquastat. If boiler temperature drops below the low limit setting, all circulating will cease until temperature of boiler water is increased. Jumper Remove factory-installed jumper between terminals ZC and ZR.
arm “tankless coil” Wiring Any control connected to the ARM is isolated and protected from circulator current with built-in 120 volt control relay. ! WARNING ! When using ZC-ZR careful attention must be paid to keeping the polarity of the wiring consistent between the Argo control and the boiler aquastat. Failure to do so could result in a secondary source of power activating the boiler under certain circumstances which could result in serious injury or death.
arm “tankless coil” Wiring ARM-4P to MH L8124 A or C Relay Relay Relay Relay Relay Relay Relay 17
AD Expansion module AD-1 1. The AD-1 Expansion Module plugs into the ARM-2P, ARM-3P, ARM-4P, and ARM-6P to provide one additional heating zone. 2. Multiples of AD-1 (single zone) Expansion Modules can be used to provide up to 15 zones maximum. The 18” connecting cable, which plugs into the ARM Circulator Zone Relay, is supplied with the unit. Separate line voltage is required. AD-4 1. The AD-4 Expansion Module plugs into the ARM-2P, ARM-3P, ARM4P, ARM-6P, or AD-1 to provide four additional heating zones. 2.
arm to ad expansion module wiring Relay Relay Relay Relay Relay Relay Relay 19
Arm to field replacement transformer wiring Relay Relay Relay Relay Relay Relay 20
arm with dpm-2 outdoor reset control The DPM-2 Outdoor Reset Control is designed to raise or lower the temperature of the boiler supply water based upon a proportionate drop or rise in temperature at the outside sensor. This control plugs into Argo control equipment with a data port or as a stand alone device that can be easily wired into almost any system. See the separate DPM-2 Installation Manual for more information.
arm with /power robbing thermostat Your new Argo ARM control should work well with all standard and most programmable setback thermostats. In the event the programmable thermostat you are using causes the control board relays to chatter, you will require an external 24V power supply (transformer) and an Argo IR882 Isolation Relay. Please refer to the literature with the IR882 for proper wiring and transformer sizing.
Replacement Parts Part Description Part Number Circulator plug-in relay (24 VAC coil) R35 Control plug-in relay (120 VAC coil) (ARM-3, 4, and 6 only) R49 18” Telephone cable connector (connects to AD-1, AD-4) C1 Field-mounted 40 VA transformer (not used on AD1, or AD-4) T40 Telephone Jack Tee Adapter J8 Technical support For technical support on this and all Argo products, please contact ECR International Technical Service at 1-800-325-5479. Please have your model number available when calling.
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