Gas Connections; Gas Line/Installation; Regulated Manifold Pressure Test - Pentair MiniMax Guide D'installation Et D'utilisation

Installation (contd.)

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 9, 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 shut-off valve must be installed
externally to the heater.
WARNING
Do not install the gas line union inside the heater
cabinet. A manual gas cock should be installed in
the gas line as close to the heater as possible.
This will void your warranty.
PIPE SIZED FOR LENGTH OF RUN IN EQUIVALENT FEET
M
5
7
9
Rev. K 5-31-06
3 / 4 i n . 1 i n .
o d e l N a t L P N a t L P
2 5 - 1 0 1 5 3 5
5 0 - - - 2 0
0 0 - - - 1
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.
MINIMAX GAS PRESSURE
REQUIREMENTS*
Maximum inlet gas pressure
Minimum inlet gas pressure
Normal manifold pressure
*All Readings are taken with heater fired.
Any adjustments made with heater off will
give incorrect readings.
The use of Flexible Connectors (FLEX) is NOT
recommended as they cause high gas pressure
drops.
1 ¼ i n . 1 ½ i n .
N a t L P N a t L P
6 5 1 5 0 1 3 0 3 6 0
3 5 8 0 7 5 1 8 0
5 2 0 4 5 4 5 1 0
Natural
10 in. WC 14 in. WC
7 in. WC 12 in. WC
4 in. WC 11 in. WC
CAUTION
2 i n . 2 ½ i n .
N a t L P N a t L P
-
5 0 0 - -
-
2 6 0 6 0 0 -
-
1 5 0 3 6 0 4 0 0
Table 8.
1 7
Propane
P/N 470880