34
6
Hydronic piping
DIR #2000546698 01
TO
SYSTEM
FROM
SYSTEM
BOILER
MAKE UP
WATER
P
T P
LOW LOSS
HEADER
LEGEND
AIR SEPARATOR
CIRCULATION
PUMP
FLOW SWITCH
OPTIONAL
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
Figure 6-3B
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
SMART SYSTEM / Multi-temperature
loop control option
The FTXL 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(s) from overheating. To help
aid with this protection, Lochinvar offers the Multi-
Temperature Loop Control Board Kit (100167843).
Installation & Operation Manual
Near boiler piping connections
DIR #2000546697 01
TO
SYSTEM
FROM
SYSTEM
MAKE UP
WATER
BOILER
P
T P
LEGEND
AIR SEPARATOR
CIRCULATION
PUMP
FLOW SWITCH
OPTIONAL
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
Figure 6-3A
Near Boiler Piping w/Y-Strainer
TEMPERATURE RISE APPLICATIONS
MODEL
FLOW RATE (GPM)
FTX(N,L)1000
25
[Based on 80°F Temperature Rise]
Table 6A1
Minimum Flow Rate with the Boiler at Full Fire
ABSOLUTE MINIMUM FLOW RATE
MODEL
FLOW RATE (GPM)
FTX(N,L)1000
4
Table 6A2
Absolute Minimum Flow Rate @ Low Fire
⚠
CAUTION
The maximum allowable water flow rate
through a single FTXL 1000 boiler is 150
GPM. Exceeding this flow rate will result
in damage to the heat exchanger and/or
piping.
NOTICE
Reference Table 6A1 for the minimum
recommended flow rate through a single
FTXL boiler at full fire to maintain a 80°F
temperature rise. Reference Table 6A2 for
the absolute minimum flow rate through a
single FTXL boiler.