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2319 Laurelbrook Street, Raleigh, NC 27604 · (800) 542-7221 · FAX (919) 834-4526 · www.ultimate-products.com
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A.6 GAS CONNECTION
The gas connection on the heater is ½” NPT external thread.
Injector sizes and manifold pressure for the burner are shown in the attached
table for all heater units.
The gas supply piping and connections must be installed so that the minimum
pressure stated is achieved.
A gas shut-off valve and union should be fitted in the gas supply line close to the
heater, and a 1/8 inch N.P.T. plugged tapping, accessible for test gauge
connection, provided immediately upstream of the appliance gas inlet.
It is essential to provide some flexibility in the final gas connection preferably by
use of an approved armored flexible connector or stainless steel expansion loop.
(See Appendix ‘A’)
SERVICE REQUIREMENTS NAT. GAS L.P. GAS
Max. inlet gas supply pressure (in.w.c.)
Min. inlet gas supply pressure (in.w.c.)
10.0
6.5
14.0
11.0