3
107050
OWNER’S MANUAL
Model EVGL850N is a radiant heat decora-
tive gas appliance that use an electronic gas
control valve with electronic ignition sys-
tem. 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
local codes or, in the absence of local codes,
with the National Electrical Code, ANS/
NFPA 70 or the Canadian Electrical Code,
CSA C22.1.
The installation must conform with local
codes or, 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.
• Model EVGL850N uses NATURAL
GAS ONLY.
If you have any doubts as to which gas your
particular unit is approved and tested for use
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.
This DESA appliance and its approved com-
ponents are safe when installed according to
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-
ner other 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 must be done by a quali-
fied service person well trained
in the installation of such appli-
ances. You will also need a build-
ing permit from your local Build-
ing and Safety Commissioner
before installing this appliance;
otherwise your insurance co. may
not cover this appliance.
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 equipment
shutoff valve must be disconnected from the
gas supply piping system during any pres-
sure testing of that system at test pressures
in excess of 1/2 psig (3.5 kPa).
The appliance must be isolated from the gas
supply piping system by closing its indi-
vidual equipment shutoff valve during any
pressure testing of the gas supply piping
system at test pressures equal to or less than
1/2 psig (3.5 kPa).
For the purpose of input adjustment two
pressure taps (for
IN
and
OUT
pressures)
are provided on the gas control valve for test
gauge connections to the appliance.
GAS RATING
Type of Gas
Natural
Max. Input Rating:
21,000 Btu/hr
Manifold Pressure:
3.5 in. WC (.87 kPa)
Minimum Supply Pressure:
4.5 in. WC (1.12 kPa)
Maximum Supply Pressure:
10.5 in. WC (2.66 kPa)
Orifice Size:
# 45
