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Outdoor Knight XL Installation & Operation Manual
3 Hydronic piping (continued)
12. Boiler purge valve: |
Field supplied. The boiler purge valve is used to |
Figure 3-4B Near Boiler Piping w/Low Loss Header
remove entrapped air from the heat exchanger during |
13. System temperature sensor: |
Lochinvar supplies a system temperature sensor. The |
sensor is to be installed in the heating loop downstream |
from the boiler hot water piping and heating loop |
junction. The sensor should be located far enough |
SYSTEM PUMP
SYSTEM SENSOR
AIR SEPARATOR
DRAIN (TYPICAL)
AIR VENT VALVE
LOW LOSS HEADER (TYPICAL)
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| O |
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R | E |
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F |
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FAST FILL VALVE
EXPANSION TANK
downstream to sense system diluted water temperature. |
14. |
Field supplied. A |
strainer is recommended at the inlet of the heat exchanger |
to remove system particles from older hydronic systems |
and protect newer systems. |
Circulator sizing
The Outdoor Knight XL heat exchanger does have a pressure drop, which must be considered in your system design. Refer to the graphs in FIG’s
Near boiler piping connections
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| INDIRECT |
DRAIN | O | DOMESTIC |
VALVE | M | HOT WATER |
F | ||
| R |
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| O | TANK |
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BOILER PUMP
IMG00391
Figure 3-4A Near Boiler Piping w/Y-Strainer
TO FLOOR
DRAIN
SYSTEM SENSOR
AIR SEPARATOR
SYSTEM PUMP
O
T
M
E
T
S
Y
S
BOILER PUMP
| M | M | |
| O |
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R | E | ||
F |
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| Y |
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DOMESTIC HOT
WATER PUMP
M
O
R
F
O
T
INDIRECT
DOMESTIC HOT WATER TANK
Variable speed pump option
Variable speed pump setup
Before operation, ensure the following:
-Pump is set for an input signal of 0 - 10VDC by the dip switches on the pump control
-Pump is set for external signal control (if applicable)
-Pump is set for linear output (if applicable)
-If pump does not come equipped with a 0 - 10 VDC input option, an optional module will be required from the vendor
SMART SYSTEM / Multi-temperature loop control option
IMG00413
TO FLOOR
DRAIN
The Outdoor Knight XL boiler is capable of producing up to three (3) set point temperatures to meet different space heating demands. When using more than one temperature demand it is necessary to protect the lower temperature loop from overheating. To help aid with this protection, Lochinvar offers the Multi- Temperature Loop Control Board Kit (RLY30086).
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