GAS CONNECTIONS
The heater requires a gas supply of not less than 4” wc and not more than 14” wc. Gas supply pressures outside of this range may result in improper burner operation. A minimum inlet pressure of 4” wc is required to maintain input rating. The gas supply must be installed in accordance with the National Fuel Gas Code, ANSI Z223.1, and all applicable local codes. Install a manual
The following gas pipe sizes are recommended for natural gas supply piping. For low pressure LP gas, pipe size may be reduced by 1/4”, with a minimum pipe size of 3/4”.
Check for compliance with local codes.
NOTICE: DO NOT use a corrugated flexible gas line to supply heater. It will not deliver enough gas (at nominal diameter) to supply heater.
Table 10
Recommended Pipe Size For Natural Gas
1,000 BTU/ft3, 0.6 Sp Gr, 0.5” wc Pressure Drop
Model | |||||
|
|
|
|
|
|
200 | 3/4” | 1” | 1” | ||
333 | 1” | ||||
400 | 1” | 2” |
Manual
Valve
At least 4"
Union
Sediment
Trap
FIGURE 22: Gas line and Trap
PRESSURE TESTING
Before operating the heater, the heater and its gas connec- tions must be leak tested. Test all gas connections for leaks with soapy water.
Risk of fire or explosion. Do not use an open flame to test for leaks.
The heater and its individual shutoff valve must be discon- nected from the gas supply piping system during any pres- sure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).
The heater must be isolated from the gas supply system by closing its individual manual shutoff valve during any pres- sure testing of the gas supply at test pressures equal to or less than 1/2 psig (3.5 kPa).
SUPPLYING POWER TO THE HEATER
The heater requires a 120V/60Hz/1Ph power supply. Enclose the 120 Volt line to the heater in an approved flex- ible conduit connected directly to the junction box on the inside of the heater jacket.
Line voltage field wiring should be 14 gauge, with a circuit capacity of 15 amps.
ELECTRICAL WIRING
1.All wiring must be in accordance with all applicable codes.
2.The heater, when installed, must be electrically grounded and bonded in accordance with local codes or, in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70. A bonding lug is pro- vided on the outside of the jacket under the vent for this purpose.
3.Electrical power circuits to the pool heater must follow local codes and National Electrical Code or Canadian Electrical Code (as applicable).
4.All wiring between the heater and devices not attached to it, or between separate devices which are field installed and located, shall conform to the specifica- tions of Type T wire (35°C rise).
5.All line voltage wiring shall be enclosed in approved flexible conduit, and shall be securely attached to the field wiring box located inside the jacket. The conduit or cable connector at the field wiring box should con- tain an insulating bushing or its equivalent to prevent abrasion of the wires as they enter the box.
6.The filter pump should run continuously when the heater is on, and for at least 15 minutes after the heater is off. Any switches in the pump circuit (includ- ing circuit breakers) that can disconnect the pump must also disconnect the heater.
7.Do not wire single pole switches, including protective devices, into a grounded line. Observe hot/neutral polarity when connecting power to the heater.
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