Wayne HSG200 Manual - page 5
E. COMBUSTION CHAMBER
A combustion chamber is normally required to
protect non-heat transfer surfaces, and to provide a
radiant bed for rapid heat transfer to the primary
surfaces of the heat exchanger. If in good condition,
the existing combustion chamber can be used.
A full combustion chamber liner is recommended for
warm air furnaces, (see Figure 4), and a target wall
or full combustion chamber liner is recommended
for wet leg cast iron or steel boilers. (See Figures 5
and 6). If a built-up chamber is necessary, use
2300˚ F (1260˚C) minimum insulating fire-brick or
fiberfrax.
THE BURNER AIR TUBE MUST NOT BE
ALLOWED TO EXTEND INTO THE CHAMBER
PROPER; IT MUST BE SET 1/2 INCH (12.7mm)
SHORT OF THE INSIDE SURFACE.
Before permanently securing the burner to the
heating appliance with either the adjustable mounting
flange or pedestal or cementing around the air tube
in the combustion chamber opening, check that the
burner head assembly is free of foreign materials and
that the sensor and electrode probes have not been
damaged or repositioned, see Figure 13.
F. GAS
PIPING
NOTICE: All piping must comply with state and/or
local codes. The available gas supply pressure
should be within minimum and maximum pressures
shown in the burner specifications. If the gas supply
pressure exceeds the 14” W.C. (3.5 k Pa) maximum,
an intermediate main gas regulator must be installed
ahead of the main gas manual shut off valve shown
in Figure 8.
WARNING: Failure to install the intermediate gas
regulator will result in gas leakage from burner gas
valve.
A drip leg or sediment trap must be installed in the
supply line to the burner. See Figure 8.
A pipe union shall be installed in the gas line
adjacent to, and upstream from, the main gas
manual shutoff valve. See Figure 8.
The gas supply piping to the burner should branch
off from the main gas supply line as close to the gas
meter as possible. Do not connect to the bottom of
a horizontal section. See Figure 9 for gas supply
pipe sizes.
Use new black iron pipe and malleable fittings free
of burrs and defects. Use pipe joint compound
resistant to liquefied petroleum gases.
A 1/8” (3.175mm) NPT plugged tapping accessible
for test gauge connection shall be provided
immediately upstream of the gas supply connection
for determining gas supply pressure to the burner.
Test new supply piping for leaks. CAUTION:
DURING PRESSURE TEST FOR LEAKS IN GAS
SUPPLY PIPING, THE BURNER MUST BE
DISCONNECTED TO PREVENT EXPOSING THE
COMBINATION GAS VALVE TO PRESSURES
OVER 1/2” (3447 PaG) PSIG. POSSIBLY
DAMAGING THE VALVE AND VOIDING THE
BURNER WARRANTY.
INPUT
PREFERRED
BTU/HR
kW/Hr
WIDTH”(mm) X LENGTH”(mm) DIAM.” (mm)
50 MBtu/HR (14.655kW)
7 (177.8) X 7 (177.8)
8 (203.2)
75 MBtu/HR (219.825kW)
7 1/2 (190.5) X 7 1/2 (190.5)
9 (228.6)
100 MBtu/HR (293.1kW)
12 (304.8) X 12 (304.8)
13 (330.2)
150 MBtu/HR (439.65kW)
12 (304.8) X 15 (381)
14 (355.6)
200 MBtu/HR (586.2kW)
13 (330.2) X 17 (431.8)
15 (381)
250 MBtu/HR (732.75kW)
13 (330.2) X 18 (457.2)
16 (406.4)
300 MBtu/HR (879.3kW)
13 (330.2) X 20 (508)
18 (457.2)
350 MBtu/HR (1025.85kW)
14 (355.6) X 21 (533.4)
20 (508)
400 MBtu/HR (1172.4kW)
15 (381) X 22 (558.8)
21 (533.4)
RECOMMENDED COMBUSTION
CHAMBER SIZES
Figure 7
SUPPLY LINE CONNECTION
TO BURNER
Figure 8
MANUAL SHUTOFF VALVE
1/8” (3.175mm) N.P.T.
PLUGGED TAPPING
PRESSURE GAGE PORT
TEE
UNION
CONTROL MANIFOLD
PIPE CAP
DIRECTION
OF FLOW
3” MIN.
(76.2mm)
3/4
Propane
400
250
200
(19.05mm)
(422000kJ) (263750kJ) (211000kJ)
1
Natural
400
250
200
(25.4mm)
(422000kJ) (263750kJ) (211000kJ)
Propane
400
350
250
(422000kJ) (369250kJ) (263750kJ)
1 1/4
Natural
400
400
300
(31.75mm)
(422000kJ) (422000kJ) (316500kJ)
Propane
400
400
(422000kJ) (422000kJ)
1 1/2
Natural
400
(38.1mm)
(422000kJ)
SUPPLY PIPE CAPACITIES IN MBtu/HR (kW)
Figure 9
CAPACITIES SHOWN ARE FOR A TOTAL PRESSURE
DROP OF 0.3” W.C. (74.73Pa) FOR 0.5” W.C. (124.55Pa)
PRESSURE DROP, MULTIPLY CAPACITY SHOWN BY 1.3.
FOR HIGHER PERMISSIBLE PRESSURE DROPS,
CONSULT YOUR UTILITY.
PIPE
SIZE
TYPE
OF GAS
CAPACITY - MBtu/HR (kJ)
LENGTH OF PIPE
15 (381mm) 30 (762mm) 45 (1143mm) 90 (2286mm)
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