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Gas Connection
Check Gas Type. Use only the gas type indicated on the
heater's rating plate. If the gas type indicated on the plate is
not your type of gas supply, DO NOT INSTALL. Contact your
dealer for the proper model.
WARNING
DANGER OF PROPERTY DAMAGE,
BODILY INJURY OR DEATH.
Make sure the heater is equipped to operate on
the type of gas available. Models designated as
natural gas are to be used with natural gas only.
Heaters designated for use with liquefied petro-
leum (LP) gas have orifices sized for commercial-
ly pure propane gas. They cannot be used with
butane or a mixture of butane and propane.
Gas Piping. The gas supply line must be of an adequate size
to handle the BTU/HR requirements and length of the run for
the unit being installed.
Determine the minimum pipe size from the piping size chart on
Page 13. The normal gas connection at this appliance is 1/2"
NPT made at the left of the unit.
Always use an external regulator for all LP installations to reduce
the supply tank pressure to a maximum of 13" w.c. This is in ad-
dition to the regulator fitted to the heater.
All piping must comply with local codes and ordinances or with
the National Fuel Gas Code (ANSI Z223.1/NFPA 54), whichever
applies.
WARNING: Connecting directly to an unregulated LP
tank can cause an explosion.
Gas Connection. If installation is for L.P. gas, have L.P. in-
staller use two-stage regulation and make all connections from
storage tank to heater. Refer to the National Fuel Gas Code for
the proper supply tank size with the Btu's/Hr requirements. If
this is the ONLY gas appliance, we recommend a minimum 200
pound cylinder with a fill gauge. Use of a 100 pound cylinder
is not recommended. Other household gas appliances may
require the tank size to be larger.
Use two pipe wrenches when making the connection to the
valve to prevent turning or damage to gas valve or regulator.
Connection between the manual shut-off valve and the gas
valve can be made with a CSA design certified flexible connec-
tor if allowed by local codes. A 10 inch, 1/2" NPT listed stain-
less steel flexible connector is supplied with the gas log heater.
Tighten all joints securely.
Typical Gas Line Connection for
UVHK23RP, UVHK29RN, UVHK31RP,
UVHK36RN MODELS
Step 1: With the engine assembly free from the fireplace, check
tightness of flexible connector fittings. You may now either at-
tach a valve (shut-off) to the flex line or another 1/2" male NPT
x flare to the supply line as shown in Figures 13A and 13B.
20008055
(Figs. 13A and 13B)
CAUTION: Use one wrench to hold the valve and one
wrench to loosen and tighten the brass adapter and the flex
line connection. Failure to hold the valve while loosening
and tightening the fittings can damage the unit and cause
gas leaks.
Step 2: Set the engine assembly into the fireplace and connect
the flex line to the gas piping that has been installed per local
codes, or in the absence of local codes, ANSI Z223.1 latest
edition.
Step 3: After the last connection is made, screw the engine as-
sembly to the bottom of the fireplace. (Fig. 12)
Refractory
Refractory
Fig. 12 After last connection is made, screw engine assembly
to bottom of the fireplace.
Step 4: Test all connections on the unit and piping for gas
leaks.
T115
Testing the Gas Piping. Test all piping for leaks. When
connect engine
checking gas piping to the heater with gas pressure less than
assy to bottom
10/27/03 djt
1/2 psi, shut off manual gas valve for the heater. If gas piping is
to be checked with the pressure at or above 1/2 psi, the heater
and manual shut off valve must be disconnected during testing
to prevent damage to the regulator on the unit, (see warning
below).
WARNING
DANGER OF PROPERTY DAMAGE,
BODILY INJURY OR DEATH.
Never use a match or open flame to test for leaks. Never
exceed specified pressures for testing. High pres-
sures may damage the appliance regulator which would
require replacement. Liquefied petroleum (LP) is heavier
than air and it will settle in any low area, including open
depressions and it will remain there unless area is ven-
tilated. Never attempt start-up of unit before thoroughly
ventilating area.
To ensure the gas lines and connections do not have any leaks,
a pressure test should be performed. Only a qualified in-
staller should perform the pressure test to ensure that the
unit is not damaged by high pressures!
WARNING: Be sure that the gas type indicated on the
gas log rating plate concurs with the gas system in your
building.
Burner
T115
11
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