Argo AZ-4CP Instruction manual

INSTALLATION, OPER ATION
& MAINTENANCE MANUAL
Information and specications outlined in this manual in eect at the
time of printing of this manual. ECR International, Inc. reserves the
right to discontinue, change specications or system design at any
time without notice and without incurring any obligation, whatsoever.
ARGO
ZONE VALVE CONTROLS
AZ-4CP / AZ-6CP
Manufactured by:
ECR International Inc.
2201 Dwyer Avenue, Utica, NY 13501
Tel. [phone]
www.ecrinternational.com
PN 24005386 REV. D [11/15/2021]

TABLE OF CONTENTS
Safety Symbols .............................................................................................................3
Introduction .................................................................................................................3
Product Description ......................................................................................................3
AZ-4CP Control Board ...................................................................................................4
AZ-6CP Control Board ...................................................................................................6
Mounting Instructions ..................................................................................................7
Electrical Specications and Wiring ..............................................................................8
AZ-CP Wiring Schematics ...........................................................................................10
ZR-ZC Wiring ..............................................................................................................11
Indirect Water Tank Wiring ........................................................................................13
Field Selectable Option Switches ................................................................................14
Sequence Of Operation ...............................................................................................16
Zone Staging ..............................................................................................................17
AZ-CP Control Expansion ............................................................................................18
Replacement Parts .....................................................................................................20
Technical Support .......................................................................................................20
DANIMPORTANT: Read and understand the following instructions COMPLETELY before installing!!
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PN 240005386 Rev. D [11/15/2021]

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 AZ-CP Zone Valve Controls with their
installation and operation so as to assure normal trouble-
free operation.
Argo controls are designed and manufactured with quality
components for maximum life and durability and require
minimum 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.
Product Description
The Argo AZ-4CP and AZ-6CP Zone Valve Controls are
multi-zone (4 and 6 zone) controls for operating both
low voltage (24Vac) zone valves for hydronic heating.
The heating zones will be controlled by thermostats (low
voltage, digital, or power-robbing) or any other type of low
voltage control with SPST switching action. Priority for an
indirect red domestic hot water tank is provided by a eld
selectable switch on Zone 1. An option for a circulator on
Zone 1 (by eld selectable switch) is also provided. The
following capacities can be achieved:
• AZ-4CP: 4 zone valves with a primary circulator or 3
zone valves with priority (indirect hot water) circulator
and primary circulator.
• AZ-6CP: 6 zone valves with a primary circulator or 5
zone valves with priority (indirect hot water) circulator
and primary circulator.
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, dened
as excess of water or other liquid, shall be
replaced. Failure to follow these directions will
result in a Hazardous Situation.
!
3
PN 240005386 Rev. D [11/15/2021]

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13
14
15
1
2
3
4
5
6
7
8
9
10
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INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AZ-4CP CONTROL BOARD
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PN 240005386 Rev. D [11/15/2021]

INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AZ-4CP Control Board
1. Transformer Spade Terminals (120 Vac) (Primary)
2. Transformer Spade Terminals (24 Vac) (Class 2)
3. Isolated End Switch X-X
4. Data Port Terminal - used for communication with the
Argo DPM-2 Outdoor Temperature Setback Control
5. LED Array:
• Status LED - ashes during normal operation
• Priority On - indicates priority mode is selected
• Primary Pump - indicates primary pump is energized
• Priority Pump - indicates the priority zone pump is
energized
• X-X Contact - indicates X-X contact is closed and
calling for heat from the boiler
• ZR On - indicates ZR-ZC dip switch is in the ON
position, priority zone is calling, and ZR-ZC terminals
are energized.
6. Thermostat Terminals (Class 2)
7. Green Indicator LED - indicates zone is calling for heat
8. Field Selectable Option Dip Switches (see “Field Selectable
Option Switches” in this manual for explanation)
9. Red Indicator LED - indicates zone valve is fully open
10. Zone Valve Terminals (Class 2)
11. ZC on Green Indicator LED
12. ZR-ZC Terminals (used for tankless coil applications)
(Primary)
13. Priority Pump Terminals (Primary)
14. Primary Pump Terminals (Primary)
15. Source Power Terminals (Primary)
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PN 240005386 Rev. D [11/15/2021]

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5
6
7
8
9
11
12
14
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17 34
10
13
NOTE: The transformer found in the AZ-6CP control
contains a manual reset circuit breaker. Should the
control not power up, check to see if the circuit
breaker has tripped (a white indicator will be visible
on the side of the breaker). The circuit breaker can
be reset by pressing the black button found on top
of the transformer.
1
2
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AZ-6CP CONTROL BOARD
6
PN 240005386 Rev. D [11/15/2021]

INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AZ-6CP Control Board
1. Transformer - 75VA, 120V/24V 50 HZ
2. Circuit Breaker Reset Switch
3. Transformer Spade Terminals (120 Vac) (Primary)
4. Transformer Spade Terminals (24 Vac) (Class 2)
5. Isolated End Switch X-X
6. Data Port Terminal - used for communication with the
Argo DPM-2 Outdoor Temperature Setback Control
7. LED Array (see “AZ-4CP Control Board” in this manual
for specications)
8. Thermostat Terminals (Class 2)
9. Green Indicator LED - indicates zone is calling for heat
10. Field Selectable Option Dip Switches (see “Field
Selectable Option Switches” in this manual for
explanation)
11. Red Indicator LED - indicates zone valve is fully open
12. Zone Valve Terminals (Class 2)
13. ZC on Green Indicator LED
14. Priority Pump Terminals (Primary)
15. ZR-ZC Terminals (used for tankless coil applications)
(Primary)
16. Source Power Terminals (Primary)
17. Primary Pump Terminals (Primary)
Mounting Instructions
Mount the Argo AZ-CP Zone Valve 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 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.
3. Hang the control on the screw(s), position the case,
and start the bottom screws.
4. Tighten all screws.
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PN 240005386 Rev. D [11/15/2021]

Electrical Specications
Model
Number Zones Transformer Voltage
Relay
Switching
Action
Total Amp
Draw
(120VAC)
AZ-4CP 4 120V/60Hz/40Va SPST 7.2A
AZ-6CP 6 120V/60Hz/75Va SPST 7.2A
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
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.
WARNING
Electrical shock hazard. Disconnect power before
installing or servicing. Failure to follow these
instructions could result in death or serious
injury.
!
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
Electrical Specications & Wiring
AZ-4CP WIRING SCHEMATIC
8
PN 240005386 Rev. D [11/15/2021]

INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AZ-6CP WIRING SCHEMATIC
9
PN 240005386 Rev. D [11/15/2021]

The diagrams in this manual represent the Argo AZ-4CP Zone Valve
Control. The AZ-6CP has similar electrical connections. Dierences in
operating features are noted in this manual.
N
L
120V Line Voltage
To Primary
Circulator
To Priority Zone
Circulator
To ZR-ZC Terminals
On Boiler Control
PRIORITY
If priority switch is in ON
position, Zones 2, 3, &
4 will not operate when
priority zone is actuated.
(See Note# 2)
1 •
2 •
3 •
Do Not Use
Black
Black
Red
Red
•
•
Motor
End Switch
3 Wire
Zone
Valve
4 Wire Zone Valve
T-stat
TT
To Boiler
NL
Line To
Transformer
Tank
Control
• •
Indirect Water Heater
Aquastat or Thermostat
24V From
Transformer
T-stat T-stat
NOTES:
1. The switching relay terminals are approved for use with copper wires only.
Torque terminal block screws 6 to 7 inch pounds.
2. When using a priority zone circulator, a jumper is required between terminals 3
and 4 of Priority Zone 1. This jumper is not required when using a zone valve.
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
AZ-CP WIRING SCHEMATIC
10
PN 240005386 Rev. D [11/15/2021]

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.
!
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
TANKLESS COIL BOILER TO AZ-CP CONTROL
(PRIORITY PUMP, PRIORITY, AND ZR-ZC OPTIONS SELECTED)
120VACPRIMARY
PUMP
PRIORITY PUMP FROM BOILER
120 VAC
TO XFRM
24 VAC
X-X CONTACT
ZR ON
PRIORITY PUMP PRIMARY PUMP PRIORITY ON
STATUS
OPTION SWITCHES
ZR-ZC
DPM-2
ZONE VALVE / PUMP
PRIORITY
OPTION SWITCHES
ZONE VALVE / PUMP
PRIORITY DPM-2
ZR-ZC
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PN 240005386 Rev. D [11/15/2021]

120VACPRIMARY
PUMP
PRIORITY PUMP FROM BOILER
120 VAC
TO XFRM
24 VAC
X-X CONTACT
ZR ON
PRIORITY PUMP PRIMARY PUMP PRIORITY ON
STATUS
OPTION SWITCHES
ZR-ZC
DPM-2
ZONE VALVE / PUMP
PRIORITY
OPTION SWITCHES
ZONE VALVE / PUMP
PRIORITY DPM-2
ZR-ZC
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
T A N K L E S S C O I L B O I L E R W I T H M H L 8 1 2 4 A O R C
TO AZ-CP CONTROL
(PRIORITY PUMP, PRIORITY, AND ZR-ZC OPTIONS SELECTED)
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PN 240005386 Rev. D [11/15/2021]

120VACPRIMARY
PUMP
PRIORITY PUMP FROM BOILER
120 VAC
TO XFRM
24 VAC
X-X CONTACT
ZR ON
PRIORITY PUMP PRIMARY PUMP PRIORITY ON
STATUS
OPTION SWITCHES
ZR-ZC
DPM-2
ZONE VALVE / PUMP
PRIORITY
OPTION SWITCHES
ZONE VALVE / PUMP
PRIORITY DPM-2
ZR-ZC
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
INDIRECT WATER TANK TO AZ-CP CONTROL
(INDIRECT WIRING WITH PUMP AND PRIORITY OPTIONS SELECTED)
13
PN 240005386 Rev. D [11/15/2021]

Field Selectable Option Switches
NOTICE
Priority selection switches may be covered with
protective lm. Remove before using selection
switches.
Zone Valve/Pump Selection Switch
Control must be in priority mode (priority switch ON) to
access this feature. With the zone valve/pump switch in
the OFF position, only the priority zone valve terminals are
energized when Zone 1 calls for heat. With the zone valve/
pump switch in the ON position, the priority pump terminals
will be energized with 120Vac when Zone 1 calls for heat.
IMPORTANT: A jumper wire (not included) must be installed
between terminals 3 and 4 of Zone 1 when using the
Priority Pump Feature. A jumper is not required when using
a zone valve.
Priority Selection Switch
If priority switch is in the ON position:
1. Zone 1 becomes priority zone.
2. When Zone 1 calls for heat, the priority zone is
activated and all other zones are deactivated. (Zone
valves for Zones 2 and higher will not operate.)
Priority ON light turns on.
3. Built-in timer automatically shuts o priority feature
(light o) temporarily if priority zone calls for heat
longer than 30 minutes, allowing all zones to operate.
Repeats every 30 minutes until priority zone is
satised. Prevents house freeze-up in event of indirect
heater malfunction.
ZR-ZC Selection Switch
The ZR-ZC switch is used in tankless coil boiler applications.
The ZR-ZC terminals on the AZ-CP control are connected
to the ZR-ZC terminals on the boiler aquastat or low limit
control. If the ZR-ZC switch is in the ON position the ZR-ZC
terminals are energized when there is a call for heat on the
priority zone and the priority zone end switch is closed.
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
DPM-2 Selection Switch
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. The DPM-2 plugs into a data port on the
AZ-CP control with a ribbon cable. If the DPM-2 selection
switch is in the ON position, the AZ-CP will be able to
communicate with the DPM-2. (See the separate DPM-2
Installation Manual for more information.)
14
PN 240005386 Rev. D [11/15/2021]

120VAC PRIMARY
PUMP
PRIORITY
PUMPFROM BOILER
120 VAC
TO XFRM
24 VAC
X-X CONTACT
ZR ON
PRIORITY PUMP
PRIMARY PUMP
PRIORITY ON
STATUS
OPTION SWITCHES
ZR-ZC
DPM-2
ZONE VALVE / PUMP
PRIORITY
OPTION SWITCHES
ZONE VALVE / PUMP
ZR-ZC
DPM-2
PRIORITY
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
DPM-2 OUTDOOR RESET WITH AN AZ-4CP CONTROL
15
PN 240005386 Rev. D [11/15/2021]

Normal Operation
(ALL DIP SWITCHES IN THE OFF POSITION)
• The control will scan all TT terminals looking for a call for
heat from any thermostat.
• When a call for heat is detected the green TT LED for
that zone will illuminate.
• The corresponding zone terminals 1 & 2 will be
energized with 24 volts.
• The control will then wait for the zone valve end switch
to close, a red LED will illuminate, indicating an open
valve.
• Once the zone valve opens the primary pump is
energized with 120 volts and the X-X contact will close.
Priority Chosen
• The control will scan all TT terminals looking for a call for
heat from any thermostat.
• When a call for heat is detected on the priority zone the
green TT LED for the priority zone will illuminate.
• The priority zone (zone 1) terminals 1 & 2 will be
energized with 24 volts.
• The control will then wait for the priority zone valve end
switch to close, a red LED will illuminate indicating the
valve has opened.
• Once the zone valve opens the primary pump is
energized with 120 volts and the X-X contact will close.
• While the priority zone is calling for heat any call
for heat on zones 2 and above will be ignored until
the priority zone is satised or the priority timer has
elapsed. (See “Priority Timer” in this manual for a more
detailed explanation.)
• If call for heat is detected on terminals 2 or above when
the priority zone is not calling the control will operate as
outlined above.
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
SEQUENCE OF OPERATION
Priority Pump Chosen
In order to use the priority pump feature both the zone
valve/pump and priority dip switch must be in the on
position.
• The control will scan all TT terminals looking for a call for
heat from any thermostat.
• When a call for heat is detected on the priority zone the
green TT LED for the priority zone will illuminate.
• The jumper on terminals 3 & 4 of the priority zone will
result in the end switch being automatically closed.
• The priority pump is energized with 120 volts and the
X-X contact will close.
• While the priority zone is calling for heat any call
for heat on zones 2 and above will be ignored until
the priority zone is satised or the priority timer has
elapsed. (See “Priority Timer” in this manual for a more
detailed explanation.)
• If call for heat is detected on terminals 2 or above when
the priority zone is not calling the control will operate as
outlined above.
ZR-ZC
• The control will scan all TT terminals looking for a call for
heat from any thermostat.
• When a call for heat is detected the green TT LED for
that zone will illuminate.
• The corresponding zone terminals 1 & 2 will be
energized with 24 volts.
• The control will then wait to for the zone valve end
switch to close; a red LED will illuminate indicating an
open valve.
• The X-X terminal will be closed.
• The control will wait for a signal back from the ZR-ZC
terminals on the boiler aquastat. Once the signal is
received the “ZC On” light will illuminate.
• The primary pump will be energized with 120 volts.
16
PN 240005386 Rev. D [11/15/2021]

Priority Pump Chosen
• The control will scan all TT terminals looking for a call for
heat from any thermostat.
• When a call for heat is detected the green TT LED for
that zone will illuminate.
• The corresponding zone terminals 1 & 2 will be
energized with 24 volts.
• The control will then wait for the zone valve end switch
to close; a red LED will illuminate indicating an open
valve.
• After the end switch has closed the AZ-CP control will
wait to receive a signal from the DPM-2. Please see
the separate DPM-2 manual for the DPM-2 sequence of
operation.
• Once the DPM-2 sends a signal back to the AZ-CP
control the primary pump is energized with 120 volts
and the X-X contact will close.
Priority Timer
When the priority zone has called for heat for 30 minutes,
the priority and non-priority zones are allowed to call
for heat together for an additional 30 minutes. After the
second 30 minute period ends, the control will switch back
to priority only mode. This pattern is repeated until the
priority zone is satised.
Pump Inactive Timer
(EXERCISES PUMPS IF OFF FOR MORE THAN 24 HOURS)
If either the primary or priority pump is o for more than
24 hours, both pumps are turned on for 5 seconds and then
turned o.
If either pump is turned on, the timer is reset.
IMPORTANT:
The ZR-ZC and DPM-2 selection switches should not both
be in the “On” position at the same time.
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
ZONE STAGING
Zone Staging is a feature that is unique to the AZ-6CP
control. When the AZ-6CP senses a power demand that
exceeds the capabilities of the 75VA transformers, the
control will energize one zone at a time until all calling zone
valves are opened. Please note that Priority/Zone 1 is not
aected by Zone Staging and is permitted to open at any
time.
17
PN 240005386 Rev. D [11/15/2021]

AZ-CP CONTROL EXPANSION
Following the instructions below, up to two (2) AZ-CP
controls can be wired together. Using two AZ-6CP controls,
this allows a maximum of ten zones plus a priority zone to
be installed in a system.
WARNING
Do not attempt to chain more than 2 controls
together. Failure to follow these instructions could
result in death or serious injury.
!
Installation Of Multiple Controls
1. Mount controls following directions in this instruction
manual.
2. Wire controls together as shown on next page. Note
that only the priority zone is shown wired. Other zones
are installed as shown previously in this manual.
3. Move the priority selection switch to the ON position on
both controls.
INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
WARNING
When wiring the thermostat to both controls verify
that there is no call for heat when the thermostat
is not calling. If there is a continuous call on
the priority zone regardless of the state of the
thermostat, the transformers may be out of phase.
If this occurs, reverse the C & R Transformer leads
on the secondary control. Failure to follow these
instructions could result in death or serious injury.
!
18
PN 240005386 Rev. D [11/15/2021]

INSTALLATION MANUAL AND OPERATING INSTRUCTIONS
CAV021 YRAMIRP
PMUP
YTIROIRP
PMUP RELIOBMORF
CAV021
MRFXOT
CAV42
TCATNOCX-X
NORZ
PMUPYTIROIRP
PMUPYRAMIRP
NOYTIROIRP
SUTATS
SEHCTIWSNOITPO
CZ-RZ
2-MP
D
PMUP/EVLAVENOZ
YTIROIRP
CAV021
MRFXOT
CAV021 YRAMIRP
PMUP RELIOBMORF
YTIROIRP
PMUP
CAV42
NORZ
NOYTIROIRP
PMUPYRAMIRP
PMUPYTIROIRP
TCATNOCX-X
SUTATS
SEHCTIWSNOITPO
PM
UP/EVLAVENOZ
YTIROIRP
2-MPD
CZ-RZ
NEEWTEBREPMUJ
4&3SLANIMRET
)DEILPPUSTON(
When using the priority pump feature, a jumper
(not supplied) will be required across terminals
3 and 4 of the priority zone terminal block.
NOTE: Dip Switches must be in
the same position on both controls.
AZ-CP CONTROL EXPANSION
19
PN 240005386 Rev. D [11/15/2021]

REPLACEMENT CONTROLS
Part Description Part Number
AZ-4CP Control with Priority Z297
AZ-6CP Control with Priority Z298
DPM-2 Outdoor Reset Control Z172
REPLACEMENT PARTS
Part Description Part Number
Transformer - 40VA, 120V/24V 50 HZ (AZ-4CP) T79
Transformer - 75VA, 120V/24V 50 HZ (AZ-6CP) 240005137
TECHNICAL SUPPORT
For technical support on this and all Argo products, please contact
ECR International Technical Service at 1-800-325-5479. Please
have the following information available when calling.
Information Needed When Ca l l i n g
Model Number
Installation Date
Installer
REPLACEMENT PARTS AND CONTROLS
All specications subject to change without notice.
©2021 ECR International, Inc.
2201 Dwyer Avenue, Utica, NY 13501
Tel. [phone]
www.ecrinternational.com