Centurion Water Heater- Edge [ii]: Install-Operation-Service
SECTION 2: INSTALLATION
OMM-0153_A
• 8/25/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 19 of 131
2.5.2 Test Hose Connection
A test hose must be connected from the drain valve on the hot water outlet to the floor drain.
This is
required
for startup and testing. The test hose diameter should be a minimum of 3/4"
(1.9 cm).
2.5.3 Dual Inlet Return Piping
The standard dual-inlet connections
allow CENTURION Water Heaters to be configured with a
separate cooler return temperature zone, rather than blending high and low return temperature
zones. Utilizing the dual return capability, these Water Heaters can take further advantage of
the
unit’s condensing capabilities. When configured in this way, thermal efficiency can improve
by up to 6% (based on an 80 °F (26.7 °C) minimum return water temperature at full fire).
To use the recirculation inlet, pipe the
warmer
building return water to the building recirculation
(upper) inlet and the cold domestic inlet water to the lower inlet. If the flow through both the
primary and the building recirculation inlet is constant, then the combined minimum flows must
equal the specified minimum flow of the Water Heater. If the flow through either of the inlets is
intermittent, then the minimum flow through one of the return connections must always equal
the specified minimum flow of the Water Heater.
Contact your PVI representative for additional information.
DRAIN VALVE
(Connect Test
Hose Here)
HOT
WATER
OUTLET
Figure 2-7: Test Hose Location
