Installation (Applicable to all Models)
2.5Piping Considerations
All piping below the elevated floor must be located so that it offers the least resistance to air flow. Careful planning of the piping layout under the raised floor is required to prevent the air flow from being blocked. When installing piping on the subfloor, it is recommended that the pipes be mounted in a horizontal plane rather than stacked one above the other. Whenever possible, the pipes should be run parallel to the air flow.
Condensate pumps for downflow units are shipped separately to be
2.5.1Drain Line
A 3/4" (19.1 mm) female pipe thread (FPT) connection is provided for the evaporator coil condensate drain. This drain line also drains the humidifier, if applicable. The drain line must be located so it will not be exposed to freezing temperatures. The drain should be at least the full size of the drain connec- tion and pitched a minimum of 1/8" per ft. (11 mm per meter).
NOTE
This line may contain boiling water. Select appropriate drain system materials.
The drain line must include one and only one trap. Units without a condensate pump have a
Table 2 | Piping connection size |
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Model No. BF/BU | Liquid Line O.D. Copper | Hot Gas Line OD Copper |
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| (50 Hz) | L | HG |
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| 042A (040A) | 3/8 | 5/8 |
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| 067A (065A) | 1/2 | 7/8 |
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Split System Fan Coil Unit | Connection |
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Model No. BF/BU (50 Hz) | Liquid Line | Suction Line |
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| L | SC |
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| 036E (035E) | 5/8 - 18 Female (#6 QC) |
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| 060E (059E) | 1/2 OD Cu |
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All Units: Connection |
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| Humidifier Line | Condensate | Condensate Pump Line | Hot Water Reheat | |
| OD Copper | Drain Line | OD Copper | OD Copper | |
| H | C | P |
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| Supply | Return |
| 1/4 | 3/4 FPT | 1/2 | HWS | HWR |
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| 5/8 | 5/8 |
Connection |
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Model No. BF/BU | Supply Line | Return Line |
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| (50 Hz) | S | R |
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046WG (045WG) | 7/8 | 7/8 |
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071WG (070WG) |
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GLYCOOL Unit Connection | Sizes |
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Model No. BE/BK | Supply Line | Return Line |
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| (50 Hz) | S | R |
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| 061G (058G) |
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Chilled Water Unit Connection |
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Model No. BF/BU | Supply Line | Return Line |
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| (50 Hz) | CWS | CWR |
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| 068C (072C) |
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| 102C (101C) |
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