Install Instructions

ELECTR CAL SPECIFICATIONS & WIR NG
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 W r
ing 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.
IR882 Features
The IR882 Is designed to interface solid state
thermostats to other systems to prevent
chatter sometimes caused by power robbing
thermostats.
Each module contains three (3) SPST relays
Modules can be easily chained for additional
thermostats.
Isolation of power sources.
Power Requirements
The IR882 requires 24 VAC connection to the
“24 VAC Input” terminals (left side of board). The
power available at the “24 VAC Output” termi
nals is limited by the VA rating of the transformer
used. (Transformer not included.)
Electrical Specifications
Argo Part
Number
Argo
Model
Number
Transformer
Voltage
Relay
Switching
Action
Z165 IR882
120V/60Hz/40Va SPST
Relay rating - 2.5 amps, 1/10 horsepower @ 120/240 VAC
24 VAC output used
ONLY for powering
up other R Series
board s
24 VAC input
from 24 V power
source.
SEQUENCE OF OPERATION
1. When a thermostat calls for heat the
TW-TR contacts will close and the
green LED for the corresponding zone
will be illuminated.
2 The corresponding X X terminals are
then closed sending a dry contact
signal to the device wired to these ter
minals
3. When the call from the thermostat
ends the TW TR contacts will then
be opened which in turn will open
the corresponding X-X terminals. The
green LED will also turn off.
IR882 Isolation Relay Module
Note: All terminals on the IR882 are Class 2
IR882 Wiring Schematics
Thermostat
Thermostat
Zone 2 Zone 1
Thermostat
To Additional
IR882 Module
(24VAC)
Isolated Switch
Zone 2
Isolated Switch
Zone 1
24VAC
Input
1.2K, 1W
LED
100K1
K1
K2
K2
K3
K3
X1
X1
TW
X2
X3
X3X2
Bridge
24VAC
Common
Isolated Switch
Zone 3
Zone 3
1.2K, 1W
LED
100
Bridge
1.2K, 1W
LED
100
Bridge
TR
C
TW
TR
C
TW
TR
C
Note: 24V common terminal is only
used for 3 wire thermostats.