Table 2 – Maximum Gas Flow Capacity*
NOMINAL | INTERNAL |
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| LENGTH OF PIPE ft (m)† |
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IRON PIPE | DIAMETER | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 125 | 150 | 175 | 200 |
SIZE (IN.) | (IN.) | (3.0) | (6.1) | (9.1) | (12.1) | (15.2) | (18.3) | (21.3) | (24.4) | (27.4) | (30.5) | (38.1) | (45.7) | (53.3) | (61.0) |
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1/2 | .622 | 175 | 120 | 97 | 82 | 73 | 66 | 61 | 57 | 53 | 50 | 44 | 40 | — | — |
3/4 | .824 | 360 | 250 | 200 | 170 | 151 | 138 | 125 | 118 | 110 | 103 | 93 | 84 | 77 | 72 |
1 | 1.049 | 680 | 465 | 375 | 320 | 285 | 260 | 240 | 220 | 205 | 195 | 175 | 160 | 145 | 135 |
1.380 | 1400 | 950 | 770 | 600 | 580 | 530 | 490 | 460 | 430 | 400 | 360 | 325 | 300 | 280 | |
1.610 | 2100 | 1460 | 1180 | 990 | 900 | 810 | 750 | 690 | 650 | 620 | 550 | 500 | 460 | 430 |
*Capacity of pipe in cu ft of gas per hr for gas pressure of 0.5 psig or less. Pressure drop of
{This length includes an ordinary number of fittings.
ROUTING CONTROL POWER WIRES
For detailed instruction on the low voltage connections to the User Interface (UI), refer to the UI installation guide.
Form a
The unit transformer supplies
The furnace board is fused by a
ACCESSORY INSTALLATION
A. Outdoor Air Temperature Sensor (OAT)
!CAUTION
EQUIPMENT OPERATION HAZARD
The installation of an outdoor air temperature sensor (OAT) using the Evolution control board OAT terminals is required. Many Evolution features (auto humidity control, comfort rollback, etc.) will be lost if the OAT is not connected.
For detailed mounting instructions for the OAT sensor, please refer installation instructions shipped with the OAT.
The OAT input is used to supply outdoor temperature data for system level functions and for temperature display on User Interface (UI). Using two wires of the
NOTE:
B. Humidifier Connections
The furnace control board terminal marked HUM is provided for low voltage
When commanded to operate humidifier, the unit control will energize the HUM output to turn humidifier on and
C. Electronic Air Cleaner
Electronic Air Cleaner terminals are provided on the Evolution Control Board
SPECIAL PROCEDURES FOR
Disconnect the black primary lead from the transformer. See unit wiring label (See Fig. 16 and 17).
Connect the black primary lead to the transformer terminal labeled
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