Greenheck IGK (472084) - Manual (Page 18)

18 Model IGK Make-Up Air
®
Reference - Venting Connection
Location
Reference - Typical Gas Train
Layout
Housing A B C D E G
Flue
Connection
H05 4.33 4.98 1.62 3.43 14.52 26.00 4.00
H15 8.09 7.38 3.87 3.62 15.43 28.37 6.00
Dimensions are in inches.
Reference - Control Center Layout
1. Supply Motor Starter - 24 volt magnetic
contacts for starting supply motor.
2. Supply Overload - Provides electronic overload
protection to supply motor.
3. Transformer - Provides voltage to combustion
blower.
4. Low Voltage Transformer (Optional) - Provides
low voltage to enable damper.
5. Combustion Fan Relay - Allows power to pass
to enable combustion fan on a call for heating.
6. Inlet Air Sensor - Outdoor air stat that
automatically controls the heating and/or cooling
based on outdoor air temperature.
7. Stage Controller - Provide two stages of control
based on discharge air temperature set point.
8. Ignition Controller - Controls the ignition and
maintains safe operation of the furnace.
9. Airflow Switch - Monitors the airflow inside the
heat exchanger to ensure proper combustion
airflow.
10. Time Delay - Allows furnace to ignite on high-
fire.
NOTE
Reference the ladder diagram on the inside of
the control center door for a unit specific wiring
diagram.
2
1
4
5
8
7 7
6
3 9
10
E
A
F
B
C
D
Disconnect
Exhaust Air
Outlet
3/4 inch gas connection
IGK HOUSING A B C D E F
H05 4.334 4.977 1.619 3.425 14.519 25.996
H15 8.094 7.378 3.868 3.618 15.433 28.372
H05
GAS
TRAIN
H15
GAS
TRAIN
Manifold Gas Pressure
Test Port
Staged Gas Valve
3/4 inch Gas
Supply Connection
Manifold Gas Pressure
Test Port
Staged Gas Valve
3/4 inch Gas
Supply Connection
Typical IGK Gas Train Layout
The following table gives the air volume in standard cubic feet per minute (SCFM) that is required to provide the
desired temperature rise for a given heating input. Model IGK has a maximum 5,000 CFM capacity.
Reference - Performance Table
Input
(MBH)
Output
(MBH)
Temperature Rise (ºF)
25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
100 80 2963 2469 2116 1852 1646 1481 1347 1235 1140 1058 988 926 871 823 780 741
150 120 4444 3704 3175 2778 2469 2222 2020 1852 1709 1587 1481 1389 1307 1235 1170 1111
200 160 NA 4938 4233 3704 3292 2963 2694 2469 2279 2116 1975 1852 1743 1646 1559 1481
250 200 NA NA NA 4630 4115 3704 3367 3086 2849 2646 2469 2315 2179 2058 1949 1852
300 240 NA NA NA NA 4938 4444 4040 3704 3419 3175 2963 2778 2614 2469 2339 2222
350 280 NA NA NA NA NA NA 4714 4321 3989 3704 3457 3241 3050 2881 2729 2593
400 320 NA NA NA NA NA NA NA 4938 4558 4233 3951 3704 3486 3292 3119 2963
Venting Connection