Page 8 | Pentair Water Commercial Pool and Spa |
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| Distance from Gas Meter | |||
Boiler | or Last Stage Regulator |
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Size |
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500 | 1½" | 2" |
| 2" |
600 | 1½" | 2" |
| 2½" |
715 | 2" | 2" |
| 2½" |
850 | 2" | 2½" |
| 2½" |
1010 | 2" | 2½" |
| 3" |
1200 | 2½" | 3" |
| 3" |
1430 | 2½" | 3" |
| 3" |
1670 | 2½" | 3" |
| 3 |
1825 | 2½" | 3" |
| 3½" |
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NOTE: These figures are for Natural Gas (.65 Sp. Gr.), and are based on 1/2" water column pressure drop. Check supply pressure with a manometer, and local code requirements for variations. For Propane Gas, reduce pipe diamter one size. An average number of tees and elbows have been taken into account.
Table 3. Gas Piping Sizes.
4.The boiler and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5kPa). The boiler must be isolated from the gas supply piping system by closing its individual manual gas shutoff valve during any pressure testing of the piping system at test pressures equal to or less than 1/2 psig (3.5kPa).
5.Provide gas supply pressure to the heater as follows:
| Natural Gas | Propane Gas | ||
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| In. W.C. | kPa | In. W.C. | kPa |
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Max. | 10 | 2.5 | 14 | 3.4 |
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Min. | 6.5 | 1.6 | 11 | 2.7 |
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NOTE: the heater and all other gas appliances sharing the boiler gas supply line must be firing at maximum capacity to properly measure the inlet supply pressure. Low gas pressure could be an indication of an undersized gas meter and /or obstructed gas supply line.
| Gas Supply |
To | Inlet |
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Equipment |
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Inlet | Tee |
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| Fitting |
Nipple | 3" (76mm) Min. |
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Cap |
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6.The correct burner manifold gas pressure is stamped on the rating plate. The regulator is preset at the factory and normally requires no further adjustment.
The gas manifold and control assembly is factory tested and conforms to the safe lighting and other performance criteria specified in the latest editions of ANSI Z21.13.CSA4.9 Low Pressure Boiler Standard.
Before operating the boiler, the complete gas supply system and all connections must be tested for leaks using a soap solution. Do not use raw flame.
Caution
Since some leak test solutions (including soap and water) may cause corrosion or stress cracking, the piping must be rinsed with water after testing, unless it has been determined that the leak test solution is noncorrosive.
2.5 Electrical Wiring
WARNING
The boiler must be electrically grounded in accordance with the most recent edition of the National Electrical Code, ANSI/NFPA 70. In Canada, all electrical wiring to the boiler should be in accordance with the latest edition of CSA C22.1 Canadian Electrical Code, Part 1. Do not rely on the gas or water piping to ground the metal parts of the boiler. Plastic pipe or dielectric unions often isolate the boiler electrically. Service and maintenance personnel who work on or around the heater may be standing on wet floors and could be electrocuted by an ungrounded boiler.
Wiring diagrams are included in the information packet provided with each unit.
1.All Model MT pool heating boilers need 115V 60Hz supply voltage unless specifically ordered otherwise.
2.The 1825 models are supplied with 3/4 HP pump motors. All other models are supplied with 1/2 HP pump motors. Consult the National Electrical Code or the Canadian Electrical Code regarding branch circuit requirements for equipment with these motors.
3.The boilers should be wired exactly as shown in the wiring diagram.
