Low Water Cutoff (Lwco) - Watts Aerco TAG-0072 GF-146-E Operation & Maintenance Manual

AM Series Boiler & Water Heater User Manual
CHAPTER 4: INSTALLATION – PIPING
SAFETY RELIEF
VALVE & T&P GAUGE
#1
SAFETY RELIEF
VALVE & T&P GAUGE
#2
HOT WATER SUPPLY
OUTLET
SAFETY RELIEF
VALVE & T&P GAUGE
WATER RETURN
INLET
SAFETY RELIEF
VALVE & T&P GAUGE
Figure 4-1: Piping the Relief Valve Discharge

4.9 Low Water Cutoff (LWCO)

A low water cutoff (LWCO) (Figure 4-2) must be installed on the outlet piping of the boiler, and
before any intervening valves (Figure 4-3). When installing such a device, you must consult and
abide by all local codes and regulations in force.
NOTE:
In AM water heater systems configured with the AM Rapid Recovery Skid option, the LWCO
is factory installed as shown in Figure 2-6 of Section 2.5.4.
NOTE:
Use Teflon tape or a suitable pipe joint compound for component and piping connections.
OMM-0100_E • GF-146 • 11/15/2019
#3
#4
Figure 4-2: Low Water Cutoff (LWCO)
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
RELIEF VALVE DISCHARGE
PIPING (one for each valve
and piped to within 18" (46
cm) of ground)
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