Gas Connections; Gas Line/Installation; Pipe Sizing Chart/Gas Pressure Requirements; Regulated Manifold Pressure Test - Pentair Water MiniMax 75 Manual De Operación Y Instalacion

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GAS CONNECTIONS

GAS LINE INSTALLATIONS
Before installing the gas line, be sure to check which gas
the heater has been designed to burn. This is important
because different types of gas require different gas pipe
sizes. The rating plate on the heater will indicate which
gas the heater is designed to burn. Table 3 shows which
size pipe is required for the distance from gas meter to
the heater. The table is for natural gas at a specific
gravity of .65 and propane at specific gravity of 1.5.
When sizing gas lines, calculate three (3) additional feet
of straight pipe for every elbow used.
When installing the gas line, avoid getting dirt, grease or
other foreign material in the pipe as this may cause damage
to the gas valve, which may result in heater failure.
The gas meter should be checked to make sure that it
will supply enough gas to the heater and any other
heaters that may be used on the same meter.
The gas line from the meter will usually be of a larger
size than the gas valve supplied with the heater.
Therefore a reduction of the connecting gas pipe will be
necessary. Make this reduction as close to the heater as
possible.
The heater and any other gas appliances must be
disconnected from the gas supply piping system during
any pressure testing on that system, (greater that ½
PSIG).
The heater and its gas connection must be leak tested
before placing the heater in operation. Do not use
flame to test the gas line. Use soapy water or another
nonflammable method.
A manual main shutoff valve must be installed
external to the heater.
WARNING
Do not install the gas line union inside the heater
cabinet. This will void your warranty.
CAUTION
The use of Flexible Connectors (FLEX) is NOT
recommended as they cause high gas pressure drops.
P/N 471105
Pipe Sized For Length Of Run In Equivalent Feet
1/2"
Model Nat LP
100 DSI 20' 50'
100 MV 20' 50'
75 20' 50'
REGULATED MANIFOLD
PRESSURE TEST
1. Attach the manometer to the heater jacket.
2. Shut off the main gas valve.
3. Remove 1/8" 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" WC for natural
gas, 11" WC for propane gas, while the heater is
operating.
7. For adjustment, use an 1/8" Allen wrench to turn
the set screw clockwise to increase -
counterclockwise to decrease gas pressure.
PENTAIR WATER POOL AND SPA

GAS PRESSURE SETTINGS*

Normal Altitudes
(0-2500 ft. Above Sea Level)
Maximum inlet gas pressure
Minimum inlet gas pressure
Normal manifold pressure
High Altitudes
(2500-3500 ft. Above Sea Level)
Maximum inlet gas pressure
Minimum inlet gas pressure
Normal high altitude
manifold pressure
* All Readings are taken with heater fired. Any
adjustments made with heater off will give
incorrect readings.
Installation (contd.)
3/4" 1"
Nat LP Nat
50' 150' 150'
50' 150' 150'
50' 150' 150'
Table 3.
Natural Propane
10" WC 14" WC
5" WC 12" WC
4" WC 11" WC
Natural Propane
10" WC 14" WC
5" WC 12" WC
3" WC 7" WC
Table 4.
Rev. H 10-16-07
LP
600'
600'
600'