41
7
Hydronic piping
(continued)
Near boiler piping connections
TO
SYSTEM
FROM
SYSTEM
MAKE UP
WATER
BOILER
P
T P
LEGEND
AIR SEPARATOR
CIRCULATION
PUMP
FLOW SWITCH
PRESSURE GAUGE
P
TEMPERATURE &
PRESSURE GAUGE
T P
SYSTEM SUPPLY
SENSOR
BACKFLOW
PREVENTER
MAGNETIC SEPARATOR
WATER METER
STRAINER / FILTER
PRESSURE
REDUCING VALVE
PRESSURE RELIEF
VALVE
BALL VALVE
EXPANSION TANK
PIPING
DRAIN PORT
DIR #2000585376 00
Figure 7-2A
Near Boiler Piping w/Y-Strainer
Circulator sizing
The 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
T P
LOW LOSS
HEADER
LEGEND
AIR SEPARATOR
CIRCULATION
PUMP
FLOW SWITCH
PRESSURE GAUGE
P
TEMPERATURE &
PRESSURE GAUGE
T P
SYSTEM SUPPLY
SENSOR
BACKFLOW
PREVENTER
MAGNETIC SEPARATOR
WATER METER
STRAINER / FILTER
PRESSURE
REDUCING VALVE
PRESSURE RELIEF
VALVE
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
The 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 (100167843).
