ECR International ARGO AR Series Instruction manual

Manufactured by:
ECR International Inc.
2201 Dwyer Avenue, Utica, NY 13501
Tel. 800 325 5479
www.ecrinternational.com
PN 24005122 REV. D [11/15/2021]
AR822-II
AR861-2II
AR861-3II
INSTALLATION, OPER ATION
& MAINTENANCE MANUAL
ARGO AR SERIES
CONTROLS
AR822-II, AR861-2II, AR861-3II

Safety Symbols ���������������������������������������������������������������������������������������������������������������������������������3
Introduction��������������������������������������������������������������������������������������������������������������������������������������3
Mounting Instructions ������������������������������������������������������������������������������������������������������������������������3
Electrical Specications & Wiring ���������������������������������������������������������������������������������������������������������4
AR822-II Single Zone Relay
AR822-II Control Features�����������������������������������������������������������������������������������������������������������4
AR822-II Sequence Of Operation�������������������������������������������������������������������������������������������������� 4
AR822-II Control Board���������������������������������������������������������������������������������������������������������������5
AR822-II Wiring Schematic ���������������������������������������������������������������������������������������������������������5
AR822-II Applications �����������������������������������������������������������������������������������������������������������������6
AR822-II With Zone Valve Priority ������������������������������������������������������������������������������������������������7
AR861-2II & AR 861-3II
AR861-2II & AR 861-3II Control Features �������������������������������������������������������������������������������������8
AR861-2II & AR 861-3II Sequence of Operation������������������������������������������������������������������������������8
AR861-2II Control Board & Wiring Schematic................................................................................9
AR861-3II Control Board & Wiring Schematic��������������������������������������������������������������������������������10
AR861-2II & AR 861-3II Applications������������������������������������������������������������������������������������������ 11
AR861-2II & AR 861-3II Expansion Control���������������������������������������������������������������������������������� 15
AR Series With DPM-2 Outdoor Reset Control................................................................................16
Replacement Parts ��������������������������������������������������������������������������������������������������������������������������� 16
Technical Support ���������������������������������������������������������������������������������������������������������������������������� 16
DANIMPORTANT: Read and understand the following instructions COMPLETELY before installing!!
TABLE OF CONTENTS
Keep this manual near boiler
Retain for future reference
2
PN 240005122 Rev. D [11/15/2021]
Information and specications outlined in this manual in eect at the
time of printing of this manual. ECR International, Inc. reserves the
right to discontinue, change specications or system design at any
time without notice and without incurring any obligation, whatsoever.

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 AR Series of controls 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 control� Failure to do so may result in breach
of warranty�
Mounting Instructions
Mount the Argo AR Series 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 to
be controlled� The control 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 amplied 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 AR822-II will require a screw to be 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�
WARNING
Fire, Explosion, Asphyxiation, Electrical shock
hazard! Flooding will result in damages such as
electrical problems, corrosion, inoperative parts,
mold and other unforeseen issues which can
occur over time� Any equipment determined by
a professional as damaged by a ood, dened
as excess of water or other liquid, shall be
replaced� Failure to follow these directions will
result in a Hazardous Situation�
!
3
PN 240005122 Rev. D [11/15/2021]

The following describes the function of each
terminal.
• L1: Hot leg of 120VAC power input
• L2: Common leg of 120VAC power input
• 3: Input to one pole of relay contacts
• 4 NO: Normally open output, between 3 and
4 NO
• 4 NC: Normally closed output, between 3 and
4 NC
• 5: Input to one pole of relay contacts
• 6 NO: Normally open output, between 5 and
6NO
• 6 NC: Normally closed output, between 5 and
6NC
T/R and T/W are thermostat connections� When Thermostat
calls completing the circuit the relay is activated�
AR822-II Sequence of Operation
1. When the thermostat connection to TR/TW calls
for heat the “circuit ON” LED is illuminated.
2. The relay will then close.
3. The contacts between 3/4 NO and 5/6 NO will
close.
4. The contacts between 3/4NC and 5/6NC will
open.
Electrical Specications
Part
Number
Model
Number
Transformer
Voltage
Relay
Switching
Action
Contact/
Control
Amp Draw
(120VAC)
Z140 AR822-II 120V/60Hz/40Va DPDT 7.2
Z209 AR861-2II 120V/60Hz/75Va DPDT 7.2
Z210 AR861-3II 120V/60Hz/75Va DPDT 7.2
AR822-II Control Features
• Auto-Reset Electronic Fuse Protection – Eliminates
Nuisance Service Calls
• 15VA Transformer – Robust Components Provide Years
of Trouble -Free Service
• Ice Cube Technology – Plug-In Replacement Relays
• 5-Year Warranty
General Wiring Notice
All primary wiring must be 14 AWG minimum. Torque
terminal screws 6 to 7 inch pounds.
U.S.A. - National Electric Code and any other nation-
al, 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.
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
Electrical Specications & Wiring
WARNING
Electrical shock hazard. Disconnect power before
installing or servicing� Failure to follow these
instructions could result in death or serious injury�
!
4
PN 240005122 Rev. D [11/15/2021]

ELECTRONIC FUSE
VAC
CIRCUIT ON
120
L2
NO
4
NC
4
SCREWS
TORQUE TERMINAL
6 TO 7 INCH LBS
AR822-TT
ARGO
TT
TT
R W
24V
C 5 6
NO
6
NC
RELAY
Factory Installed Jumper Between L1 & 3
Class 2
Terminals
Primary
Terminals
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AR822-II CONTROL BOARD
AR822-II WIRING SCHEMATICS
5
PN 240005122 Rev. D [11/15/2021]

TO BURNER
OR BURNER
CONTROL
DO NOT USE
AR822-II Dual Zone Application
without Tankless Coiler Boiler
AR822-II Single Zone Application
with Tankless Coil Boiler
AR822-II APPLICATIONS
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
6
PN 240005122 Rev. D [11/15/2021]

L2
120
VAC
L1
CIRCUIT ON
+
NO
3
NC
4 4
ARGO
AR822
WR C
TT 24V
5 6 6
NO NC
BURNER CONTROL
TO BURNER OR
DO NOT USE
L8148
2
1
T
C2
B1
C1
B2
T
PRIORITY
CIRC.
24 VAC
COM
T
X-X TT TT T TT TT
ON
ZONE 2
END SW 2
X2X1
END SW 1
X1 X2
ZONE 1
21 3 4 1 2
AZ-3
ARGO
Zone Valve Controller
ZONE 3
43 1 2 43
AZ-5
ZONE 4
1 2 43 3
ZONE 5
1 2 4
SUPPLIED
WITH RELAY AZ-5
STAT STAT STAT STAT STAT
VALVE VALVE VALVE VALVE VALVE
DOMESTIC
HOT
WATER
L
N
120
VAC
JUMPER
N
120
VAC L
HEATING
ZONE
PUMP
120
VAC
L
N
NOTE: Thermostats must be
mercury switch style or battery
powered for this installation to
function properly�
AR822-II Indirect Tank Priority
with Zone Valve Control
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AR822-II APPLICATIONS
7
PN 240005122 Rev. D [11/15/2021]

INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AR861-2II & AR861-3II Control Features
• 2-Zone AR861-2II or 3-Zone AR861-3II
• Auto-Reset Electronic Fuse Protection – Eliminates
Nuisance Service Calls
• 15VA Transformer – Robust Components Provide Years
of Trouble -Free Service
• Ice Cube Technology – Plug-In Replacement Relays
• Priority Function
• 5-Year Warranty
AR861-2II & AR861-3II Sequence of Operation
If the Priority Switch is in the “OFF” Position:
1. When a zone calls for heat the corresponding
zone LED is illuminated.
2. The relay for the corresponding zone will then
close.
3. A/R terminals will close starting the boiler.
4. The corresponding GZ/HZ terminals will be
energized with 120 Volts.
If the Priority Switch is in the “ON” Position:
1.Zone 1 becomes the priority zone.
2. When zone 1 calls for heat, the priority zone is
activated and all other zones are deactivated
(circulators for zones 2 and higher will not
operate). Zone 1 LED is illuminated indicating a
call for heat.
3. Zone 1 relay will close.
4. A/R terminals will close starting the boiler.
5. GZ 1/HZ 1 will be energized with 120 Volts.
8
PN 240005122 Rev. D [11/15/2021]

RELAY
RELAY
RELAY
Class 2 Terminals
Primary Terminals
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AR861-2II CONTROL BOARD & WIRING SCHEMATIC
9
PN 240005122 Rev. D [11/15/2021]

RELAY
RELAY
RELAY
RELAY
Class 2 Terminals
Primary Terminals
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AR861-3II CONTROL BOARD & WIRING SCHEMATIC
10
PN 240005122 Rev. D [11/15/2021]

The diagrams on the following pages represent the AR861-3II. The AR861-
2II is wired in a similar fashion.
Priority
T-Stat
Primary Wiring
Class 2 Wiring
AR861-3II
Primary Wiring
Jumper
Priority
Circ L4006A
T-Stat
T-Stat
Circ
L2
GWLA R
GZ1
T1 T1 T2 T2 T3 T3
HZ1 GZ2 HZ2 GZ3 HZ3
GCirc
120 VAC
L1
Hot
Milli Volt
Gas Valve
RELAY
RELAY
RELAY
RELAY
Each of the low voltage controllers (SPST Thermostats) will actuate a circulator
and start the burner when used in conjunction with an isolated switch aquastat.
Jumper: To be placed between terminals Land W. In this position Aand R
become the isolated end switch. (Jumper is factory installed in this position)
Terminals Aand RIsolated End Switch
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AR861-2II & AR861-3II APPLICATIONS
11
PN 240005122 Rev. D [11/15/2021]

Priority
T-Stat
Primary Wiring
Class 2 Wiring
AR861-3II
Primary Wiring
Jumper
Priority
Circ L4006A
T-Stat
T-Stat
Circ
L2
GWLA R
GZ1
T1 T1 T2 T2 T3 T3
HZ1 GZ2 HZ2 GZ3 HZ3
G
Circ
Milli Volt
Gas Valve
120 VAC
L1
Hot
24V
Transformer
Priority
T-Stat
L8148
Primary Wiring
To Burner or
Burner Control
Do
Not
Use
Class 2 Wiring
AR861-3II
Primary Wiring
Jumper
Priority
Circ
T-Stat
T-Stat
TT
1
2
Circ
GWLAR
GZ1
T1 T1 T2 T2 T3 T3
C1
C2
B2
B1
HZ1 GZ2 HZ2 GZ3 HZ3
Circ
L2
G
120 VAC
L1
Hot
AR861-2II & AR861-3II APPLICATIONS
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
12
PN 240005122 Rev. D [11/15/2021]

RELAY
RELAY
RELAY
RELAY
Terminals Wand Rto Aquastat
(Wto ZC and Rto ZR)
Each of the low voltage controllers (SPST Thermostats) will actuate a circulator
and start the burner when used in conjunction with a boiler aquastat control. If the
boiler temperature drops below the low limit (circulator) setting, all circulating will
cease until the temperature of the boiler water is increased.
Jumper: To be placed between terminals Land A. In this position a line voltage
message is sent out Rto ZR terminal on the aqustst and returns to Wfrom the
ZC terminal on the aqustst.
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AR861-2II & AR861-3II APPLICATIONS
WARNING
AR relays will not work properly if 120 VAC polarity
is not the same at 120 VAC L and N terminals on
both AR control and boiler aquastat� The neutral
and hot wires must not be reversed� Reversing the
L and N wires could result in a secondary source of
power that may activate the boiler under certain
circumstances which could result in death or serious
injury�
!
WARNING
When using ZC-ZR attention must be paid to keep
the polarity of the wiring consistent between the Argo
control and 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� Always disconnect power
to both the Argo control and boiler when installing or
servicing this product�
!
13
PN 240005122 Rev. D [11/15/2021]

Priority
T-Stat
Primary Wiring
Burner
Class 2 Wiring
AR861-3II
Primary Wiring
Jumper
Priority
Circ
T-Stat
T-Stat
L8124
A or C
T
T
L1
L2
Circ
GWLR
GZ1
T1 T1 T2 T2 T3 T3
C1
C2
B2
B1
ZR
ZC
HZ1 GZ2 HZ2 GZ3 HZ3
Circ
L2
G
120 VAC
L1
Hot
A
Priority
T-Stat
Primary Wiring
Burner
Class 2 Wiring
AR861-3II
Primary Wiring
Jumper
Priority
Circ
T-Stat
T-Stat
L8124
A or C
T
T
L1
L2
Cad Cell
Circ
GWLR
GZ1
T1 T1 T2 T2 T3 T3
C1
C2
B2
B1
ZR
ZC
HZ1 GZ2 HZ2 GZ3 HZ3
Circ
L2
G
120 VAC
L1
Hot
A
AR861-2II & AR861-3II APPLICATIONS
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
14
PN 240005122 Rev. D [11/15/2021]

THERMOSTATS
GZ2
120 V CIRCULATOR
15VA
120VAC
G W L RA
PRIORITY
GZ1 HZ1
PRIORITY OFF
PRIORITY ON
PRIORITY
T1 T1 T2
GZ3HZ2 HZ3
T3T3T2
STATSTAT
CIRC CIRC
DO NOT
USE
N
L
120
VAC
CIRC
STAT
T2
120 V CIRCULATOR
GZ2
THERMOSTATS
15VA
L
120
VAC
N
W
120VAC
G L A GZ1
PRIORITY
R HZ1
PRIORITY OFF
PRIORITY ON
2.7 K
1.0 K
2.7 K
1.0 K
PRIORITY
T1 T2T1
CIRC
HZ2 GZ3 HZ3
1.0 K
2.7 K
T3 T3
STAT
CIRC
TO BOILER
T-T
TO BOILER
T-T
DOMESTIC
WATER
HOT
JUMPER
JUMPER
TRIPLE RELAY AR861-3 II
ARGO
TRIPLE RELAY AR861-3 II
ARGO
The two controls on this page are capable of running six zones. When
they are installed as shown below, only one priority and four standard
zones (for a total of ve zones) are available.
Important:
Both left-hand T1 terminals
must be connected together
and both right-hand T1
terminals must be connected
together� Reversing the wiring
will result in the transformers
being out of phase�
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AR861-2II & AR861-3II EXPANSION TECHNIQUE
15
PN 240005122 Rev. D [11/15/2021]

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.
Replacement Part
Part Description Argo Part Number
Replacement Control Relay R35C
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.
Information Needed When Calling
Model Number
Installation Date
Installer
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AR SERIES WITH DPM-2 OUTDOOR RESET CONTROL
Technical Support
All specications subject to change without notice.
©2021 ECR International, Inc�
2201 Dwyer Avenue, Utica, NY 13501
Tel. 800 325 5479
www.ecrinternational.com
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3
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