32
General Glass Information
Glass Cleaning
It will be necessary to clean the glass periodically. During start-up, con-
densation, which is normal, forms on the inside of the glass and causes
dust, lint etc. to cling to the glass surface. Also, initial paint curing can
deposit a slight film on the glass. It is therefore recommended that ini-
tially the glass be cleaned two or three times with non-abrasive com-
mon household glass cleansers and warm water. After that, the glass
should be cleaned two or three times a season depending on the circum-
stances.
Cautions and Warnings
• Do not clean when the glass is hot.
• The use of substitute glass will void all product warranties.
• Care must be taken to avoid breakage of the glass.
• Do not operate this fireplace without the glass front or with a broken
glass front.
• Do not strike or abuse glass.
Glass Replacement
REPLACEMENT GLASS FOR BOTH DIRECT VENT UNITS
Model MDV30 or MDV31 Series can use either tempered glass or
Robax ceramic or coated Neaoceram glass. Must be 5 mm thick.
Only Robax ceramic or coated Neaoceram glass may be used for
replacement for model MDV38/MDV39 Series. Must be minimum
5mm thick.
Removal of the Glass Door
1. Remove the two screws located behind upper grill.
2. To remove, pull frame forward and lift from bottom door retainer.
3. To replace glass, clean all materials from door frame. Using a high
heat silicone (temperature-resistant to 500°F (260°C) apply a bead
of approximately 1/32” to all four sides of frame and insert glass
with new gasket. Frame should be on flat surface, with a small
amount of weight pressing glass into silicone. Let dry approximate-
ly 15 to 20 minutes. The door can be re-installed by reversing Steps
1 & 2.
Gas Line Installation
This gas appliance should be installed by a qualified installer in accordance with
local building codes and with current CAN/CGA - B149.1 or .2 installation codes for
Gas Burning appliances and equipment in Canada and the National Fuel Gas Code
ANSI Z223 in the U.S.A.
1. The gas pipeline can be brought in through either the right or the left side of the
appliance. A knockout is provided at either location to allow for the gas pipe
installation and testing of any gas connection.
2. The gas control inlet is 3/8” NPT. Typical installation layout for rigid pipe is
shown at right.
3. When using
copper
or
flex connector
, use only approved fittings. Always pro-
vide a union so that gas line can be easily disconnected for burner or fan servic-
ing. See gas specification for pressure details and ratings.
4. When a vertical section of gas pipe is required for the installation, a condensa-
tion trap is needed. See CAN/CGA-B149.1 or .2 for code details.
5. For natural gas, a minimum of 3/8” iron pipe with gas minimum pressure of 4.5
w.c. must be used for supply from the gas meter. Consult with the local gas utili-
ty if any questions arise concerning pipe sizes.
6. A 1/8” NPT plugged tappings are accessible for test gauge connection both on
the inlet and outlet of the gas valve.
7. Turn the gas supply ON and check for leaks. DO NOT USE OPEN FLAME
FOR THIS PURPOSE. Use an approved leak testing solution.
8. The appliance and its individual shutoff 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).
9. The appliance must be isolated from the gas supply piping system by closing its
individual shutoff valve during any pressure testing of the gas supply piping sys-
tem at test pressures equal to or less than 1/2 PSIG (3.5 KPa).
Note: The gas line connection may be made of 1/2” rigid pipe or an approved
flex connector. Since some municipalities have additional local codes, it is
always best to consult your local authorities and the current CAN/CGA - B149.1
or .2 installation code in Canada or the National Fuel Gas code ANSI Z223.1 in
the U.S.A.
Gas Specifications
FUEL
LP/PROPANE
NG/NATURAL
MODEL
MDVR31LP
MDVR31NG
MDVR39NG(converted)
MDVL31LP
MDVL31NG
MDVL39NG(converted)
ORIFICE SIZE
#51
#36
#30
INPUT BTU/HR
HIGH 30,000
30,000
39,000
LOW 25,000
22,500
26,000
AIR SHUTTER
.25"
.093"
.188"
Gas Inlet Size
S.I.T. 820 Nova, 3/8” NPT
Gas Supply Pressure
Minimum
Normal
Maximum
Natural Gas
5.5”
7”
9”
Liquid Propane
11”
11”
12”
Manifold Pressure
Natural Gas
Liquid Propane
Manifold Pressure High
3.5 IN. W.C./.87 KPa
10 IN. W.C./2.61 KPa
Manifold Pressure Low
1.6 IN. W.C./.40 KPa
6.3 IN. W.C./1.57 KPa
Important:
Always check for gas leaks with a soap and water solution. Do not use
open flame for leak testing.
For the state of Massachusetts a
T-handle gas shut-off valve
must
be used on a gas appliance. This T-handle gas shut-off valve must
be listed and approved by the state of Massachusetts. This is in ref-
erence to the state of Massachusetts state code CMR238.
Summary of Contents for MDV30
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