Gas Connection; System Data Chart - U37; High Elevation; Aeration Adjustment - Regency ULTIMATE U37-LP Owners & Installation Manual

GAS CONNECTION

The gas connection is a 3/8" NPT 90
The gas line can be rigid pipe or to make
installation easier, use a listed flexible connec-
tor and/or copper tubing if allowed by local
codes. Since some municipalities have addi-
tional local codes it is always best to consult
with your local authorities and the CAN/CGA
B149 installation codes. For USA installations
follow local codes and/or the current National
Fuel Gas Code, ANSI Z223.1.
When using copper or flex connectors use
only approved fittings. Always provide a union
so that gas lines can be easily disconnected for
burner and/or valve servicing. Flare nuts for
copper lines and flex connectors are usually
considered to meet this requirement.
Important: Always check for gas leaks
with a soap and water solution or gas
leak detector. Do not use open flame for
leak testing.
Note: Prior to any pressure testing of
the gas supply piping system that
exceeds test pressures of 1/2
psig, this appliance must be dis-
connected from the piping sys-
tem. If test pressures equal to or
less than 1/2 psig are used then
this appliance must be isolated
from the piping system by clos-
ing its individual manual shut-off
valve during the testing.
System Data - U37
For 0 to 4500 feet altitude
Burner Inlet Orifice Sizes:
Natural Gas Propane
Burner #37
Max. Input Rating 30,000 Btu/h
Min. Input Rating 15,000 Btu/h
Supply Pressure
Natural Gas min. 5.0" w.c.
Propane min. 12.0" w.c.
Manifold Pressure
Natural Gas 3.8" +/- 0.2" w.c.
Propane 11" +/- 0.2" w.c.

HIGH ELEVATION

This unit is approved in Canada for altitude 0 ft. to
4500 ft. (CAN/CGA-2.17-M91). For Natural Gas
installations above 4500 ft. follow current CAN/
CGA-B149.1.
U37 Regency ULTIMATE Rear Vent Direct Vent Freestanding Gas Heater
AERATION
ADJUSTMENT
o
elbow.
The burner aeration is factory set but may need
adjusting due to either the local gas supply, air
supply or altitude.
Natural Gas:
Propane:
The aeration adjustment gears are located on
the right side of the burner box and can be
accessed from the side or from the front when
the louvers are removed.
To adjust the aeration: use the allen key to turn
the turning gear which will adjust the air shut-
ter. Open the air shutter for a blue flame or close
it for a yellower flame. The factory setting
should be sufficient for most installations.
#52
Clockwise to open,
counter-clockwise to close.
Caution: Carbon will be produced if the air
shutter is closed too much.
Note: Any damage due to carboning re-
sulting from improperly setting
the aeration controls is NOT cov-
ered under warranty.
Note: Aeration Adjustment should only
be performed by an authorized
Regency Installer at the time of
installation or service.
INSTALLATION
INSTALLATION
Read the instructions below carefully
and refer to the diagrams. If logs are
broken do not use the unit until they are
replaced. Broken logs can interfere with
1/4" open the pilot operation.
3/8" open
The gas log kit contains the following:
a) 02-65 Rear Log
b) 02-56 Middle Left Log
c) 02-44 Front Left Log
d) 02-46 Left Top Log
e ) 02-45 Front Right Log
f) 02-47 Center Log
g) 02-48 Middle Right Log
h)
i)
The "02" refer numbers (i.e. 02-65) are
molded into the rear of each log.
1) Carefully remove the logs from the box and
unwrap them. The logs are fragile, handle
with care - do not force into position.
2) Sprinkle the embers on the left and right
sides of the firebox base.
Embers.
LOG SET
902-267
902-230
902-228
902-231
902-229
902-232
902-226
Embers 902-151
Lava 902-154
Embers
17