Pump Sizing - Jandy JXi 200 Installation And Operation Manual

Page 50
ENGLISH

5.1 Pump Sizing

(From Section "5.1 Pump Sizing" on page 19)
All JXi heaters utilize an internal bypass mechanism and thermal regulator valve (TRV) to accommodate flow rates
delivered to the heater from a minimum of 30 gallons per minute (gpm) to a maximum flow of 100 gpm.
CAUTION
The system water pump must be ca-
pable of providing no less than 30 gpm
of flow through the heater. Flow rates at
less than 30 gpm may cause nuisance
operation causing damage to the heater
or causing the heater to turn off.
MIN GPM
MODEL
(LPM)
JXI 260
30 (114)
JXI 400
30 (114)
Table 8. Recommended Flow Rate Adjustment
20.0
JXi 260K BTU Heater
18.0
JXi 400K BTU Heater
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
20 30 40
Figure 11a. Head Loss Chart
MAX GPM
(LPM)
100 (379)
100 (379)
50 60 70 80
Flow Rate
(GPM)
Jandy , JXi Gas-Fired Pool & Spa Heater
® ™
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
90 100 110
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Installation & Operation Manual