Installation (contd.) | 13 |
|
|
Pipe Sized For Length Of Run In Equivalent Feet, (cont’d.)
PROPANE 2 STAGE REGULATION
In many “RESIDENTIAL” Propane gas line installations, the gas supplier and or installer will utilize a two stage regulation process where by at the supply tank they will install the first stage gas regulator, which would be at a higher pressure, usually 10 psi and can be for longer distance and in a smaller pipe size. Then within a short distance from the heater they will install a second regulator, which is the second stage, and this would be set at the reguired inlet pressure of 11 inches of W.C. for all the Pentair Pool Heaters.
Stage One "High Pressure" Gas Pipe Sizing
MAXIMUM EQUIVALENT PIPE LENGTH
Model | 0 to 50 Feet | 50 to 100 Feet | 100 to 150 Feet | ||
|
|
|
| ||
75 & 100 | 1/2 in. | 1/2 in. | 1/2 in. | ||
|
|
|
| ||
150 | 1/2 in. | 1/2 in. | 1/2 in. | ||
|
|
|
| ||
200 | 1/2 in. | 1/2 in. | 1/2 in. | ||
|
|
|
|
|
|
250 | 1/2 | in. | 1/2 | in. | 1/2 in. |
|
|
|
|
|
|
300 | 1/2 | in. | 1/2 | in. | 1/2 in. |
|
|
|
|
|
|
350 | 1/2 | in. | 1/2 | in. | 1/2 in. |
|
|
|
|
|
|
400 | 1/2 | in. | 1/2 | in. | 1/2 in. |
|
|
|
|
|
|
Table 8.
Stage Two "Low Pressure" Gas Pipe Sizing
MAXIMUM EQUIVALENT PIPE LENGTH
Model | 0 to 10 Feet | 10 to 20 Feet | |
|
|
| |
75 & 100 | 1/2 in. | 1/2 in. | |
|
|
| |
150 | 1/2 in. | 1/2 in. | |
|
|
| |
200 | 1/2 in. | 3/4 in. | |
|
|
| |
250 | 1/2 in. | 3/4 in. | |
|
|
|
|
300 | 3/4 | in. | 3/4 in. |
|
|
|
|
350 | 3/4 | in. | 3/4 in. |
|
|
|
|
400 | 3/4 | in. | 3/4 in. |
|
|
|
|
Table 9.
REGULATED MANIFOLD PRESSURE TEST
1.Attach the manometer to the heater jacket.
2.Shut off the main gas valve.
3.Remove 1/8 in. NPT plug on the outlet side of the valve and screw in the fitting from the manometer kit.
4.Connect the manometer hose to the fitting.
5.Fire the heater.
6.The manometer must read 4 in. WC for natural gas, 11 in. WC for propane gas, while the heater is operating.
7.For adjustment, remove the Regulator Adjustment Cap and using a screwdriver turn the screw clockwise to increase - counterclockwise to decrease gas pressure.
CAUTION
The use of Flexible Connectors (FLEX) is NOT recommended as they cause high gas pressure drops.
REGULATOR
ADJUSTMENT CAP
PILOT
| HONEYWELL |
|
|
| 1/2 P.S.I. |
| PRESS |
|
| ||
| PILOT |
| TAP |
Figure 11. | ADJ. |
|
|
MINIMAX CH GAS PRESSURE REQUIREMENTS*
| Natural | Propane |
|
|
|
Maximum inlet gas pressure | 10 in. WC | 14 in. WC |
Minimum inlet gas pressure | **5 in. WC | 12 in. WC |
Normal manifold pressure | 4 in. WC | 11 in. WC |
** 6 WC for 400 model |
|
|
*All Readings are taken with the heater fired. Any adjustments | ||
| made with heater off will give incorrect readings. |
| |
Table 10. |
|
|
Rev. B | P/N 472128 |
