Installation Guide

3. Step-By-Step Outline of Installation 1-2014
3.8.3.1 Natural Gas Supply
NOTICE
The Natural Gas supply meter may need to be exchanged for a higher capacity meter to
supply the additional gas consumed by the generator set.
See the Generator Set Specifications Table for fuel specifications, such as BTU. To
determine the required meter capacity, generator set consumption must be added to the gas
consumed for heating, cooking, clothes drying, etc.
• A typical installation might require a 400,000 BTU meter.
Consideration should also be given to utilizing high pressure gas supply (2 psi) if available. This
will reduce the required size, and therefore cost, of gas piping, especially if the location of the
generator set requires a long supply line.
NOTICE
An older site might require upgrading and repair of the gas supply system, which
should be scheduled to minimize power and gas supply interruptions.
3.8.3.2 Natural Gas Supply Line Size
See the Generator Set Specifications Table for fuel specifications (such as BTU/hr).
The Natural Gas meter may not be adequate if the meter serves other gas appliances, such as
a:
• Furnace
• Water heater
• Stove
To correctly size the fuel pipe, you must also take other loads operated from the fuel supply line
into consideration, such as:
• Space heating equipment
• Water heating equipment
Use the total load requirement of the fuel supply line to determine the size of the fuel supply
pipe. Use the Natural Gas Pipe Capacity - Cubic Feet of Gas Per Hour table to determine the
correct pipe size.
NOTICE
For Spec A and Canadian GSBB Spec B, make sure the fuel supply pressure at the inlet to the
generator regulator (at service port) is set between 5–11 in. WC for all operating loads (no load to
full load).
For US GSBB Spec B and Canadian GSBC Spec B, make sure the fuel supply pressure at the
inlet to the generator regulator (at service port) is set between 5 –7 in. WC for all operating loads
(no load to full load).
30 A029V088 (Issue 16)