Install Instructions

41
7 Hydronic piping (continued)
Near boiler piping connections
TO
SYSTEM
FROM
SYSTEM
MAKE UP
WATER
BOILER
P
TP
LEGEND
AIR SEPARATOR
CIRCULATION
PUMP
FLOW SWITCH
PRESSURE GAUGE
P
TEMPERATURE &
PRESSURE GAUGE
TP
SYSTEM SUPPLY
SENSOR
BACKFLOW
PREVENTER
MAGNETIC SEPARATOR
WATER METER
STRAINER / FILTER
PRESSURE
REDUCING VALVE
PRESSURE RELIEF
VALV E
BALL VALVE
EXPANSION TANK
PIPING
DRAIN PORT
DIR #2000585376 00
Figure 7-2A Near Boiler Piping w/Y-Strainer
Circulator sizing
 e Knight XL heat exchanger does have a pressure drop,
which must be considered in your system design. Refer to the
graphs in FIG 7-3 pressure drop through the Knight XL heat
exchanger.
TO
SYSTEM
FROM
SYSTEM
BOILER
MAKE UP
WATER
P
TP
LOW LOSS
HEADER
LEGEND
AIR SEPARATOR
CIRCULATION
PUMP
FLOW SWITCH
PRESSURE GAUGE
P
TEMPERATURE &
PRESSURE GAUGE
TP
SYSTEM SUPPLY
SENSOR
BACKFLOW
PREVENTER
MAGNETIC SEPARATOR
WATER METER
STRAINER / FILTER
PRESSURE
REDUCING VALVE
PRESSURE RELIEF
VALV E
BALL VALVE
EXPANSION TANK
PIPING
DRAIN PORT
DIR #20005857530 00
Figure 7-2B Near Boiler Piping w/Low Loss Header
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
Installation & Operation Manual
SMART TOUCH / Multi-temperature loop
control option
 e Knight XL boiler is capable of producing up to
three (3) set point temperatures to meet di erent 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 o ers the Multi- Temperature Loop Control
Board Kit (100167843).