Nortek 1034920A Downflow Gas Furnaces Instruction Manual
- June 12, 2024
- NORTEK
Table of Contents
INSTALLATION INSTRUCTIONS
INDUCER ORIFICE SELECTION
Refer to the tables below to select the appropriate orifice size for this replacement kit. The orifice size can also be found on the back side of each orifice.
G7, PGC2 UPFLOW / HORIZONTAL UNITS
| CABINET SIZE | INPUT (MBTUH) | **ORIFICE SIZE (INCHES)*** |
|---|---|---|
| A | 38 | 0.88 [Single Stage] / 0.62 [Single Stage] |
| B | 46 | 0.94 |
| B | 54 | 0.94 [Single Stage] / 0.75 [Single Stage] |
| B | 57 | 0.75 [Two Stage] |
| B | 60 | 0.88 [Two Stage] / 1.00 [Modulating] |
| B | 61 | 1.00 |
| B | 72 | 1.00 |
| C | 72 | 1.16 [Single Stage] / 0.88 [Single Stage] |
| C | 76 | 0.875 (Two Stage) |
| C | 80 | 1.00 |
| C | 90 | 1.38 [Single Stage] / 1.13 [Single Stage] |
| C | 100 | 1.25 |
| D | 108 | N/A [Single Stage] / 1.16 [Single Stage] |
| D | 120 | N/A [Two Stage / Modulating] / 1.38 [Single Stage] |
*G7 DOWNFLOW UNITS
| A | 38 | 0.56 |
|---|---|---|
| B | 54 | 0.94 [Single Stage] / 0.75 [Single Stage] |
| B | 60 | 0.75 |
| B | 72 | 1.00 |
| C | 72 | 0.88 |
| C | 80 | 0.97 |
| C | 90 | 1.13 |
| C | 100 | 1.31 |
| D | 118 | 1.38 |
| D | 120 | N/A [Single Stage] / 1.50 [Two Stage] |
*NOTE: Model series in brackets where applicable
M7RL & M7TL DOWNFLOW GAS FURNACES
| CABINET SIZE | INPUT (MBTUH) | **ORIFICE SIZE (INCHES)*** |
|---|---|---|
| A | 45 | 0.62 |
| 60 | 0.687 | |
| 72 | 0.94 | |
| B | 45 | 0.62 |
| 60 | 0.687 | |
| 72 | 0.94 |
MG2S DOWNFLOW GAS FURNACE
| ORIENTATION | INPUT (MBTUH) | ORIFICE SIZE (INCHES) |
|---|---|---|
| Front | 45 | 0.5625 |
| 60 | 0.69 | |
| 72 | 0.875 | |
| Top | 45 | 0.58 |
| 60 | 0.75 | |
| 72 | 0.84 |
Specifications & illustrations subject to change without notice or incurring
obligations (05/23).
O’Fallon, MO, © Nortek Global HVAC LLC 2023. All Rights Reserved.
1034920A
(Replaces 10349200 )
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