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Heat & Glo • MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual • 2600-980 Rev. D • 9/19
A. Fuel Conversion
• Make sure the appliance is compatible with available gas
types.
• Conversions must be made by a qualified service
technician using Hearth & Home Technologies specified
and approved parts.
B. Gas Pressure
• Verify inlet pressures. Verify minimum pressures when
other household gas appliances are operating.
• Install regulator upstream of valve if line pressure is
greater than 1/2 psig.
• Valve pressure taps are accessible by removing the
decorative barrier front and the bottom glass shield.
9
Gas Information
Gas Pressure
Natural Gas
Propane
Minimum inlet pressure
5.0 in. w.c.
11.0 in. w.c.
Maximum inlet pressure
10.0 in. w.c.
13.0 in. w.c.
Manifold pressure
3.5 in. w.c.
10.0 in. w.c.
Note:
Have the gas supply line installed in accordance with
local codes, if any. If not, follow ANSI Z223.1. Installation
should be done by a qualified installer approved and/or
licensed as required by the locality. (In the Commonwealth
of Massachusetts installation must be performed by a
licensed plumber or gas fitter).
Note:
A listed (and Commonwealth of Massachusetts ap
-
proved) 1/2 in. (13 mm) T-handle manual shut-off valve
and flexible gas connector are connected to the 1/2 in. (13
mm) control valve inlet.
• If substituting for these components, please consult
local codes for compliance.
Fire Risk.
Risk of Fire! Risk of Explosion!
Incorrect pressure will damage valve.
• Isolate
gas supply piping BEFORE pressure
testing gas line at test pressures above 1/2
psig.
• Close the manual shutoff valve BEFORE
pressure testing gas line at test pressures
equal to or less than 1/2 psig.
WARNING
• Optimum appliance performance requires proper input
pressures.
• Gas line sizing requirements will be determined in ANSI
Z223.1 National Fuel Gas Code in the USA and CAN/
CGA B149 in Canada.
• Pressure requirements when in operation are:
Figure 9.1 Valve Pressure Taps
VALVE PRESSURE TAPS
Note:
This appliance does include a manual gas shutoff
valve that is located in the valve compartment. This manual
gas shutoff valve is accessible for service by removing
the decorative barrier front and the bottom glass shield.
The valve is most accessible if it is located forward in the
control cavity of the appliance.
Depending upon local code, an additional manual gas
shutoff, in a readily accessible area may be required and
located upstream from the appliance.
The bottom panel is removable if finishing material is not
installed. See Figure 9.2.
If
the finishing materials have been installed around the
appliance opening, proceed as follows:
1. Remove bottom glass shield.
2. Remove screws on left and right sides of component
heat shield and lift it out of the control cavity.
Figure 9.2 Bottom Glass Shield and Bottom Panel Location
CAUTION!
Risk of Overheating!
Component heat shield
MUST be installed before operating appliance. Electrical
components will be damaged.
C. Gas Service Access
BOTTOM PANEL SCREW LOCATIONS
BOTT
OM P
ANEL
BOTT
OM GLASS SHIELD