ECR Argo ARH-1 Technical Document

INSTALLATIONMANUALANDOPERATINGINSTRUCTIONS
ARGOHYDRO-AIRZONINGCONTROLS
ARH-1,ARH-2,ARH-3
P/N 240005131, Rev. 1.1 [10/06]
An ISO 9001-2000 Certified Company
ARH-1
ARH-2
ARH-3
ARGO (Technical Support)
2201 Dwyer Avenue
Utica, NY 13501
(Corporate Sales)
85 Middle Road
Dunkirk, NY 14048
www.argoindustries.com

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INSTALLATION MANUAL
AND OPERATING INSTRUCTIONS
P/N#240005131, Rev. 1.1 [10/06]
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TABLE OF CONTENTS
Safety Symbols ..............................................................................3
Introduction .....................................................................................4
Product Description ........................................................................5
Features and Benefits ....................................................................5
Control Board Diagrams .................................................................6
Mounting Instructions .....................................................................7
Electrical Specifications & Wiring ...................................................8
Sequence of Operation ..................................................................9
Terminal Descriptions .....................................................................9
Wiring Applications .......................................................................11
Replacement Parts List ................................................................15
Technical Support .........................................................................15
RETAIN THIS MANUAL FOR FUTURE REFERENCE
SAFETY SYMBOLS
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.

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SAFETY SYMBOLS Continued
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WARNING
Indicates a potentially hazardous situation which, if not
avoided, COULD result in death or serious injury.
CAUTION
Indicates a potential hazardous situation which, if not avoid-
ed, MAY result in minor or moderate injury. It may also be
used to alert against unsafe practices.
IMPORTANT: Read the following instructions COMPLETELY
before installing!!
WARNING
All installations should be done only by a qualified expert
and in accordance with the appropriate Argo manual. In-
stalling an electric appliance with improper methods or
materials may result in serious injury or death due to fire.
INTRODUCTION
This manual is intended to familiarize the installer and user of the
Argo ARH Series of Controls with their installation and operation to
assure normal trouble-free operation.
Argo controls are designed and manufactured with quality compo-
nents for maximum life and durability and require minimal service.
To insure a satisfactory installation, it is imperative that the instruc-
tions be followed carefully before operating the control. Failure to
do so may result in breach of warranty.

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ARH FEATURES AND BENEFITS
Choice of Three Models
– Single Zone/Expansion module
– Two-Zone With Priority
– Three-Zone with Priority
All ARH Models have plug-in connections for easy expansion
up to 20 zones.
Multiple Terminals for 2-speed air handlers
Built-In Air Handler “Freeze Protection”
Switchable Priority for domestic hot water applications.
LED Diagnostic Lights for easy troubleshooting.
Includes Strap-On Bi-Metal Aquastat to prevent “cold air” cir-
culation in heating mode.
18 Month Warranty
All Controls Made In The USA
100% Quality Controlled
All Controls Supported by Argo Technical/Training Programs
PRODUCT DESCRIPTION
Argo Hydro-Air Zoning Controls provide the easiest way to inter-
face between the thermostat and air handler. These dependable
control relays will control from 1 to 20 zones of heating/cooling and
provide priority switching for domestic hot water. Boiler and A/C
condenser wiring is virtually fool proof.

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RELAY
RELAY
ARH-1
RELAY
RELAY
RELAY
RELAY
ARH-2
ARH CONTROL BOARD DIAGRAMS

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MOUNTING INSTRUCTIONS
Mount the Argo ARH Series Control vertically on a solid wall or par-
tition. For your convenience it is recommended that the control be
mounted as close as possible to the device being controlled, how-
ever it should never be mounted more then 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 amplified 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 ARH-1 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 screws, position the case, and start the
bottom screws.
4. Tighten all screws.
ARH CONTROL BOARD DIAGRAMS Continued
RELAY
RELAY
RELAY
RELAY
RELAY
RELAY
ARH-3

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Electrical Specifications
Argo
Model
Number
Argo Part
Number Power Input Thermostat
Current Supplied Aquastat
ARH-1 Z181 24VAC/60Hz
.085A
3/8” to 3-4” Strap on
Bi-Metal
(ON at 118°F + 5%)
(OFF at 95°F + 5%)
ARH-2 Z179
24VAC/60Hz
120VAC/60Hz for
Circulator Power
ARH-3 Z180
24VAC/60Hz
120VAC/60Hz for
Circulator Power
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ELECTRICAL SPECIFICATIONS & WIRING
WARNING
ELECTRICAL SHOCK HAZARD! Disconnect power be-
fore installing or servicing. Can cause severe personal
injury, death, or substantial property damage if ignored.
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.

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SEQUENCE OF OPERATION
TERMINAL DESCRIPTIONS
When the thermostat calls for heat, the boiler end switch closes,
starting the burner and energizing the heating circulator. The fan
will operate at low speed (G1) when the water temperature is above
the aquastat setting at the Hydro-Coil.
When priority zone is actuated, the priority circulator and boiler end
switch is energized. The heating circulator is shut off and the fan will
operate at low speed (G1) until the water temperature drops below
the aquastat setting.
When the thermostat calls for cooling, the Argo Control energizes
the outdoor condenser and starts the fan on high speed (G2).
Optional Freeze Protection for Hydro-Coil: When the Freeze Ter-
minals (TT) are shorted together as with SPST actuator, the heating
zone circulator will operate to circulate water through the Hydro-
Coil.
Tor additional zones, use telephone connector to ARH-1 module.
Up to 20 Air Handler Zones can be “Daisy Chained” together.
Thermostat
W - Heat Switched Leg
G - Fan Switching Leg
Y - Cool Switching Leg
R - 24VAC Hot
C - 24VAC Common (Optional for use on thermostats
requiring common leg)

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TERMINAL DESCRIPTIONS Continued
Aquastat
TT- Connect to factory supplied strap-on aquastat at
Hydro-Coil. These terminals must be closed for fan the to
operate in Heating Mode. Install a jumper if no aquastat is
used.
Boiler End Switch
X1X1 - Connect to TT terminal on boiler
X2X2 - Extra End Switch
Freeze
TT- Optional freeze protection when (TT) is connected to
aquastat at Hydro-Coil. When closed, these terminals
start the heating circulator, but the not fan. Using an SPST
aquastat that closes when temperature falls to 40°F with a
5°F differential (MHL 480B), is recommended.
Air Handler
Y - Cooling Relay (Condenser)
G1 - Heat Fan Center Relay (Low Speed)
G2 - Cool Fan Center Relay (High Speed)
Note: One Speed Fan requires Jumper to be in-
stalled between G1 and G2.
R - 24VAC Hot used to switch all functions.
C - 24VAC Common used to power fan control.

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ARH-1 SINGLE ZONE HYDRO-AIR
CONTROL INSTRUCTION
WIRING DIAGRAM APPLICATIONS
Note: Zone 1 R & C
terminals must be con-
nected and energized
for board to function.
Note: Connection
for 2 Speed Fan
(Remove Jumper)
* - IF USED. IF NOT,
JUMPER MUST BE INSTALLED.

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Note:
Connection
for 2 Speed
Fan (Remove
Jumper)
Note: Zone 1 R & C
terminals must be con-
nected and energized
for board to function.
ARH-2 TWO ZONE HYDRO-AIR
CONTROL INSTRUCTION
(1 AIR HANDLER AND 1 PRIORITY ZONE)
WIRING DIAGRAM APPLICATIONS
* - IF USED. IF NOT,
JUMPER MUST BE INSTALLED.

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Note:
Connection
for 2 Speed
Fan (Remove
Jumper)
Note: Zone 1 R & C terminals must
be connected and energized for
board to function.
ARH-3 THREE ZONE HYDRO-AIR
CONTROL INSTRUCTION
(2 AIR HANDLERS AND 1 PRIORITY ZONE)
WIRING DIAGRAM APPLICATIONS
* - IF USED. IF NOT,
JUMPER MUST BE INSTALLED.

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CONTROL EXPANSION APPLICATION
Wiring Diagram for Adding
ARH-1 to ARH-2 or ARH-3
RELAY
RELAY
RELAY
RELAY
RELAY
RELAY

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Replacement Parts
Part Description Argo Part Number
Relay 24VDC Coil R35DC
Snap on Aquastat A10
18” Telephone Cable C1
Freeze Stat Aquastat A11F
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.
Information Needed When Calling
Model Number
Installation Date
Installer