Jandy JXi400P User Manual

Page 20
ENGLISH
Jandy
®
, JXi
™
Gas-Fired Pool & Spa Heater
|
Installation & Operation Manual
Figure 11. Head Loss Chart
For ASME heater models JXi400NC, JXi400PC, JXi260NC and JXi260PC please go to “Appendix A. ASME® Header” on page 49.
4.0
5.0
6.0
7.0
8.0
9.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
JXi 200K BTU Heater
JXi 260K BTU Heater
JXi 400K BTU Heater
0.0
1.0
2.0
3.0
0.0
2.0
4.0
6.0
20 30 40 50 60 70 80 90 100 110
s
ign Pressure Drop (psi)De
s
esign Head Loss
( Head)
D
Flow Rate (GPM)
JXi VersaFlo™ Bypass
6.1.1 Manual Bypass Valve
A manual bypass valve is to be installed in any system in
which the pump ow exceeds 100 gpm to the heater.
• Connect a valve between the water inlet and outlet.
See inset “a.” in Figure 10.
• Adjust the valve to bring the ow rate within the
acceptable range. See Table 4.
• Remove the valve handle to avoid tampering.
6.1.2 Pump Sizing for New Pool Construction:
When sizing a pump for the system, the head loss
for all system components must be added together
when determining the design ow rate. Component
“Head Loss at Flow” curves are available from
equipment manufacturers.
NOTE: Inordertoproperlyestablishheadlossatowforalter,
rememberthata“dirty”ltercantypicallyadd10psiofadditional
head loss (23 extra feet of head). This must be considered when
sizing a pump for a new pool system.
6.1.3 Pump Sizing for Replacement in an Existing Pool:
If the JXi heater replaces a different model of heater,
determine if the existing pump is capable of providing
the minimum ow of 30 gpm. JXi heaters are high
efciency heaters. Heaters typical of this construction
may have higher head loss characteristics than the one
being replaced.
CAUTION
Heaterfailureduetoinsufcientwaterowisnotcoveredunderwar-
ranty. See measurements in the Head Loss Chart. See Figure 11.
6.2 Plumbing Connections
The heater has a standard 2 inch water manifold and
coupling design. With this feature, only nominal two inch
PVC or CPVC may be connected to the heater. However,
by installing appropriate pipe adapters and two-inch pipe
(supplied by the installer), any size existing pipe may be
tted to the heater.

Jandy JXi400P Specifications

General

Brand	Jandy
Model	JXi400P
Category	Swimming Pool Heater
Language	English