16
I-RIH (05-21) 131793-A
INSTALLATION—CONTINUED
Electrical Connections—Continued
Wiring for Units with 24VAC Direct Spark Ignition (DSI) Single-Stage Controls—Continued
Figure 8. 24VAC DSI Heater Wiring Diagram
Wiring for Units with 24VAC Direct Spark Ignition (DSI) Two-Stage Controls
•
See
and
•
Available only on the following units with option AG2R: model RIHV unit size 100 and model RIHVN unit sizes
150 and 200
•
Electrical supply: 24VAC, 60 or 50Hz, 1PH
•
Maximum total heater current draw: 0 .96A
•
Total heater power consumed: 23 .1VA (23 .1W)
•
Three-wire field service required to two-stage thermostat
•
Four-wire thermostat cable required from thermostat to heater
•
Control is polarity sensitive
•
Field wiring:
•
Thermostat cable: 18/4 (18AWG, 0 .8 mm
2
, 4-conductor), solid, class 2
•
Minimum insulation temperature: 140°F (60°C) between thermostat and heater
•
Maximum length: 125 feet (38 meters)
Figure 9. 24VAC DSI Two-Stage Heater Electrical Supply and Thermostat Wiring
GND
(-)
(+24)
GGS
BL
R
2-Stage
Thermostat
C
G
R
W2
W1
R
BL
GGS
VR*
SW*
MV*
LEGEND
(+24) = 24VAC Supply Voltage
(-) = Supply Neutral
GND = Earth Ground
MV = Mechanical Ventilation
VR = Ventilation Relay
SW = Ventilation Interlock Switch
(normally opened)
GGS
= Green Ground Screw (inside control box)
BL
= Blue Wire
- 24 VAC call for LOW heat
R
(on heater) = Red Wire - 24 VAC call for HIGH heat
Heater 1
Heater 2
G(3)
O
O
Y
(+24)
BL
GND
Green Ground
Screw (GGS) G(1)
G(1)
G(2)
R(1)
R(2)
R(1)
G(2)
BL
Y
Wire Colors
BK = Black
G = Green
O = Orange
R = Red
W = White
Y =Yellow
field wiring
Combination
Gas Valve (CGV)
Ignition
Control
(IDC)
Flame
Sensor
(FS)
Spark
Electrode
(SE)
