4 Water connections (continued)
6 - 90° elbows 2 - ball valves
2- unions..................................................................
1 - cold water tee
Not more than 45 feet of straight pipe.
Installation & Operation Manual
Initial set-up of maximum water flow
On initial
NOTICE For every elbow and tee in excess of those shown above, deduct 5 feet
from the maximum allowable straight pipe in the pool heater to the system circulating loop.
Minimum Pump Performance
Pump performance is based on providing adequate flow and temperature rise to prevent scale accumulation in the heat exchanger. See Water Chemistry on page 45.
CAUTION
An appliance allowed to operate at return temperatures below the specified minimum setting may experience problems with the operating controls, safety switches, obstruction of the flue gas passages on the heat exchanger, incomplete combustion and possible flue gas spillage. Sustained operation at lower than specified water temperatures (140°F) may cause hazardous conditions that may result in personal injury or
Minimum Pump Performance and Temperature Rise
Models GPM Ft.Hd. Temperature Rise
502 | 55 | 10 | 15.5°F |
652 | 55 | 10 | 20.3°F |
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752 | 55 | 10 | 23.2°F |
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992 | 90 | 15 | 18.7°F |
1262 | 90 | 15 | 23.8°F |
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1442 | 90 | 15 | 27.2°F |
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1802 | 115 | 18 | 26.6°F |
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2072 | 115 | 18 | 30.6°F |
Heat exchanger
This is a highly sophisticated heat exchanger, designed to carry water in such a way that it generates a scouring action which keeps all interior surfaces free from
WARNING Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect
the electrical supply to the pump. Instead, shut off the gas supply at a location external to the pool heater.
Auxiliary Mixed Water Limit Control
Pool return and pool supply (mixed water limit) sensors (reference FIG.
Ensure pool return and pool supply (mixed water limit) sensors are both installed in the system piping. The return sensor should be installed in the upstream of the feed water to the pool heater. The supply sensor limits the temperature of the water going back to the pool (factory adjusted to < 110°F). The supply sensor may be installed in the filtration system piping, be sure to keep it at least three (3) feet downstream from the point where the heated water from the pool heater is being added to the filtration system.
Note: In order to accurately sense water temperatures, both sensors need to be in the actual water flow.
Installation of return and supply sensors:
Both pool sensors are immersion type sensors with 1/4" NPT threads and may be installed directly into the system piping by drilling 7/16" pilot holes and tapping them with a 1/4" NPT tapered tap. Apply a small amount of high quality RTV silicone sealant to the threads to prevent leaks and install the sensors into the threaded openings in the PVC pipe.
Sensor connections:
The sensors are connected to the pool heater from the factory. The return sensor is a
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