Pentair MT warranty 2D. Freeze Protection, 2E. Gas Supply and Piping

Page 6 Pentair Water Commercial Pool and Spa

4.Liquified petroleum is heavier than air. Therefore, the pool boiler should not be installed in pits or other locations where gas could accumulate. The boiler should be located a safe distance from LP gas storage and filling equipment. Consult local codes and fire protection authorities for advice relative to specific installation restrictions.

2D. Freeze Protection

Boiler installations are not recommended in areas where the danger of freezing exists unless proper precautions are made for freeze protection.

2E. Gas Supply and Piping

Review the following instructions before proceeding with the installation.

1.Verify that the boiler is fitted for the proper type of gas by checking the rating plate. Model MT boilers are normally equipped to operate below a 2000 foot altitude. Boilers equipped to operate at higher altitudes have appropriate stickers or tags attached.

2.Use the figures in Table 3 to provide adequate gas piping (check local code for BTU capacity required).

Distance from Gas Meter or

Natural and LP Gas

		0-100'		100-200'		200-300'
Indoor	Outdoor
Size	Size	Nat.	LP	Nat.	LP	Nat.	LP
2000	—	2½	2	3	2½	3	3
2450	2200	3	2½	3	2½	3½	3
3050	2800	3	2½	3½	3	3½	3
3500	3200	3	2½	3½	3	4	3½
4050	3600	3½	3	4	3½	4	3½
4500	4000	3½	3	4	3½	5	4
5000	4500	4	3½	4	3½	5	4

NOTES:

These figures are based on ½" water column pressure drop. Check supply pressure and local code requirements before proceeding with work.

Pipe fittings must be considered when determining gas pipe sizing.

3.A trap (drip leg) must be provided ahead of the gas controls (see Figure 5). Where required by code, provide a second manual gas shutoff valve. Do not remove manual valve furnished with the unit.

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. The boiler

Figure 5. Tee Fitting Sediment Trap.

must be isolated from the gas supply piping system by closing its individual manual gas shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig.

5.Provide gas supply pressure to the boiler as follows:

	Natural	Propane
Min. (inches water column)	7	11
Max. (inches water column)	9	14

Note: The boiler and all other gas appliances sharing the 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.

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.

7.The gas manifold and control assembly was tested and conforms to the safe lighting and other performance criteria specified in the latest editions of ANSI Z21.13 and CGA 3.3 Low Pressure Boiler Standard.

8.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.