Gas Line Installation - Marquis MQHBZDV3636 Instruction Manual

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 instal-
lation layout for rigid pipe is shown at right.
3. When using copper or flex connector, use only
approved fittings. Always provide a union so
that gas line can be easily disconnected for burn-
er or fan servicing. See gas specification for
pressure details and ratings.
4. When a vertical section of gas pipe is required
for the installation, a condensation trap is need-
ed. 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 utility
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.
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.
Gas Specifications
Models MQHBZDV
4736N
Fuel Natural
Gas Control Millivolt Adjustable
Maximum Input HI [Btu/hr] 40,000
Maximum Input LO [Btu/hr] 27,000
Maximum Output HI [Btu/hr] 27,200
Orifice Size (0-4500ft) #31
Air Shutter Opening 5/16"
Gas Inlet Size S.I.T. 820 Nova, 3/8" NPT
Gas Supply Pressure Minimum
Natural Gas [in. w.c.] 5.5"
Propane [in. w.c.] 11"
Manifold Pressure Nat. Gas
High [in. w.c. / kPa] 3.5" / 0.87
Low [in. w.c. / kPa] 1.6" / 0.40

Gas Line Installation

4736LP 4236N 4236LP
Propane Natural Propane
36,000 30,500 29,200
30,000 20,600 22,200
24,100 23,180 22,100
#49 #36 #51
Fully Open 3/16" 5/16"
Normal Maximum
7" 9"
11" 12"
Propane
10" / 2.61
6.3" / 1.57
Important: Always check for gas leaks with a
soap and water solution. Do not use open flame
for leak testing.
3636N 3636LP
Natural Propane
30,500 29,200
20,600 22,200
23,200 21,900
#36 #51
3/16" 5/16"
32
MQRB
4236N 4236LP 4236NT 4236LPT
Natural Propane Natural
30,500 29,200 24,000
20,600 22,200 18,000
23,180 22,100 -
#36 #49 #42
3/16" 5/16" 1/32"
Propane
24,000
19,000
-
#53
1/4"