13
Maintenance And Service
b
uRneR
s
hutteR
c
aP
a
Djustment
:
The U37 contains an adjustable shutter cap that can alter the amount of air the burner receives. This can
greatly affect the quality of the burn, especially when converting the gas type for the unit. Follow these steps
carefully to properly set the shutter cap:
1. Remove the burner assembly from the unit (see
M
aIntenance
anD
s
erVIce
- B
urner
a
sseMBly
r
eMoVal
on page
12).
2. The cap at the back of the burner assembly can be rotated to open/close the air channel for the burner (see
Figure 11).
3. Adjust the shutter forward following the guidelines
below. These are general settings only and the
shutter may require additional adjustment
(less/more) depending on the exact setup of the
appliance:
Figure 11: Burner Cap Adjustment
c
omPonent
b
ackPack
R
emovaL
:
The component backpack houses the valve, IFC and
fuses for the fireplace. It is located on the back right
side of the unit. To remove the backpack and access
the components, remove the eight (8) T-20 screws
around the perimeter (see Figure 12).
Once installed, the components can be accessed from
inside the firebox. Refer to
M
aIntenance
a
nD
s
erVIce
- c
oMPonent
a
ccess
a
fter
I
nstallatIon
on page 15
for instructions on how to do so.
*Note: Ensure that the backpack is properly supported
while removing from the unit to avoid possible damage
and injury.
Figure 12: Component Backpack Removal
8x11 Venting NG: Closed
8x11 Venting LP: Closed - 3/16” open
5x8 Venting NG: 3/16” - 1/4” open
5x8 Venting LP: 3/8” - 7/16” open
Important Note
- When using 5x8 venting the burner shutter setting greatly effects both the burner and pilot
flames. Opening the shutter too much will result in a blue transparent flame and unstable pilot.