IV. FIELD CONNECTIONS
A. External Trap Condensate Drain
The unit's
When using the standard side drain connection, make sure the plug in the alternate bottom connection is tight before installing the unit.
To use the bottom drain connection for a roof curb installa- tion, relocate the
All units must have an external trap for condensate drain- age. Install a trap at least
B. Install Flue Hood
Flue hood is shipped screwed to the burner compartment ac- cess panel. Remove from shipping location and using screws provided, install ¯ue hood in location shown in Fig. 2 and 9.
NOTE: Drain plug is shown in
Fig. 7 Ð Condensate Drain Pan
NOTE: Trap should be deep enough to offset maximum unit static dif- ference. A
Fig. 8 Ð External Trap Condensate Drain
Fig. 9 Ð Flue Hood Details
For units being installed in California Air Quality Manage- ment Districts which require NOx emissions of 40 nanograms/ joule or less, kit CRLOWNOX001A00 must be installed.
C. Gas Piping (Fig. 10)
Unit is equipped for use with type of gas shown on nameplate.
The gas supply pipe enters the unit through the access hole provided. The gas connection to the unit is made to the
Install a separate gas supply line that runs directly from the meter to the heating section. Refer to Table 2 and the NFGC for gas pipe sizing. Do not use cast iron pipe. Check the local utility for recommendations concerning existing lines. Choose a supply pipe that is large enough to keep the pressure loss as low as practical. Never use pipe smaller than the
For natural gas applications, the gas pressure at unit gas con- nection must not be less than 4 in. wg or greater than 13 in. wg while the unit is operating. On 581B048,060,072 high heat units, the gas pressure at unit gas connection must not be less than 5 in. wg or greater than 13 in. wg while the unit is operating. For propane applications, the gas pressure must not be less than 5 in. wg or greater than 13 in. wg at the unit connection.
LEGEND
NFGC Ð National Fuel Gas Code
*Field Supplied.
NOTE: Follow all local codes.
STEEL PIPE NOMINAL | SPACING OF SUPPORTS |
DIAMETER (in.) | X DIMENSION (ft) |
1¤2 | 6 |
3¤4 or 1 | 8 |
11¤4 or Larger | 10 |
Fig. 10 Ð Gas Piping Guide
(With Accessory Utility Connections Package)
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