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105705
OWNER’S MANUAL
ModelVGL850seriesareradiantheatdecora-
tive gas appliances that use a millivolt gas
controlvalvewith amillivoltignition system.
A 5” B-Type venting system and a listed type
vent cap are not supplied but are required for
proper operation. See venting instructions on
pages 6 and 7.
This appliance, when installed, must be
electrically grounded in accordance with
localcodes or,intheabsenceoflocalcodes,
with the National Electrical Code, ANS/
NFPA 70 or the Canadian Electrical Code,
CSA C22.1.
The installation must conform with local
codesor, in the absence of local codes, with
the current National Fuel Gas Code, ANS
Z223.1 or with the current CAN/CGA B149
Installation Codes.
This appliance complies with ANS Z21.50-
1998 and CSA 2.22-M98 as Vented Gas
Fireplaces and is listed and tested by the
Canadian Standards Association to the
above test standards.
INTRODUCTION
WARNING: This gas appli-
ance must not be connected to a
chimney flue servicing a solid
fuel burning appliance.
• ModelVGL850N uses NATURAL GAS
ONLY.
• Model VGL850P uses PROPANE GAS
ONLY.
If you have any doubts as to which gas your
particularunitisapprovedandtestedforuse
with, please check the rating plate located
behind the control access door (Figure 1,
page 2).
BEFORE YOU BEGIN
Before beginning the installation of your
appliance, read these instructions through
completely.
ThisDESAapplianceanditsapprovedcom-
ponentsaresafewheninstalledaccordingto
this installation manual and are operated as
recommended by DESA. Unless you use
DESA approved components tested for this
appliance, YOU MAY CAUSE A FIRE
HAZARD!
The DESA warranty will be voided by, and
DESA disclaims any responsibility for the
following actions :
A) Modification of the appliance or any of
the components.
B) Use of any component part not ap-
proved by DESA in combination with
this appliance.
C) Installation and/or operation in a man-
nerother than instructed in this manual.
D) The burning of anything other than the
type of gas approved for use in this gas
appliance.
WARNING:Installation of this
appliance should be done by a
qualified service person well
trained in the installation of such
appliances. You will also need a
building permit from your local
Building and Safety Commis-
sionerbeforeinstallingthisappli-
ance; otherwise your insurance
co. may not cover this appliance.
NOTICE: This appliance is not
intended to be used as a primary
source of heat.
CAUTION: Do not connect
appliance before pressure test-
ing gas piping. Damage to gas
valve may result and an unsafe
condition may be caused.
The appliance and it’s individual shut-off
valve must be disconnected from the gas
supply piping system during any pressure
testing of that system at test pressures in
excess of 1/2 psig (3.5 kPa).
Theappliancemustbeisolatedfromthegas
supply piping system by closing its indi-
vidual manual shut-off valve during any
pressure testing of the gas supply piping
systemat testpressures equalto orless than
1/2 psig (3.5 kPa).
For the purpose of input adjustment two
pressure taps (for IN and OUT pressures)
areprovidedonthegascontrolvalvefortest
gauge connections to the appliance.
GAS RATING
TYPE OF GAS NATURAL PROPANE/LP
Max. Input Rating: 21,000 Btu/hr 21,000 Btu/hr
Manifold Pressure: 3.5 in. WC (.87 kPa) 10.0in.WC(2.49kPa)
Minimum Supply Pressure: 4.5 in. WC (1.12 kPa) 11.0in.WC(2.74kPa)
Maximum Supply Pressure: 10.5 in. WC (2.66 kPa) 13.0in.WC(3.23kPa)
Orifice Size: # 45 #54
