Figure 9
Propane gas venturi label identification
(Black label)
Figure 10
Natural gas venturi label identification
(White label)
Part number 550-100-131/0120
– 13 –
®
gas
-
fired
water
boiler
— 220/299/300/399
Boiler Manual
Installing propane venturi —
1. Propane venturi will have a black label identifying venturi
part number. See Figure 8, page 12 for correct part number.
2. Verify that the label on the propane venturi is correct for the
model size (see Figure 9 below).
3. If the jacket front door was not already removed, remove it.
Boiler
Model
Part Number
Gas Type
Venturi Ø
EVG
220
511-050-219
LPG
30
EVG
299/300
511-050-220
LPG
34
EVG
399
511-050-221
LPG
38
• Follow all instructions in proper order.
• Do not tamper with venturi. DO NOT change or modify
venturi in any way.
• Dispose of an uninstalled venturi; do not leave in the building.
• Caution – the gas supply shall be shut off prior to discon-
necting the electrical power, before proceeding with the
conversion.
• Whenever the venturi is removed, all gaskets must be replaced
with new gaskets.
Gas conversions
(continued)
Pipe sizing for propane gas
1. Contact gas supplier to size pipes, tanks and 100% lockup
gas pressure regulator.
Natural and Propane supply pressure
1. Adjust propane supply regulator provided by gas supplier
between the pressure listed below:
2. Pressure required at gas valve inlet pressure port:
a. Maximum: 14” (356 mm) w.c. with no flow (lockup).
b. Minimum gas pressure, with gas flowing (verify during
boiler startup, while boiler is at high fire): 3½” (89 mm) w.c.
Boiler
Model
Part Number
Gas Type
Venturi Ø
EVG
220
511-050-212
NG
30
EVG
299/300
511-050-215
NG
34
EVG
399
511-050-216
NG
38
EVG 299/300 LP
P/N 540-202-841 NG to Propane Gas Conversion Kit contents:
511-050-220
Venturi - Liquefied Petroleum (Propane) Gas
1
562-150-292
Screw Pan Hd T20 M4x12 w/Square Cone Lock Washer
3
562-248-765
Washer .89 ID x 1.19 OD Garlock
1
590-318-102
O-Ring 3mm x 70mm Black
1
590-318-103
Gasket 1-Lips EPDM Ring 60 Dia MM
1
550-225-336
Label Gas Conversion
1
550-142-871
Instructions Conversion Nat to LP Gas
1
EVG 399 LP
P/N 540-202-842 NG to Propane Gas Conversion Kit contents:
511-050-221
Venturi - Liquefied Petroleum (Propane) Gas
1
562-150-292
Screw Pan Hd T20 M4x12 w/Square Cone Lock Washer
3
562-248-765
Washer .89 ID x 1.19 OD Garlock
1
590-318-102
O-Ring 3mm x 70mm Black
1
590-318-103
Gasket 1-Lips EPDM Ring 60 Dia MM
1
550-225-336
Label Gas Conversion
1
550-142-871
Instructions Conversion Nat to LP Gas
1
Liquefied Petroleum (Propane) to Natural Gas
conversion kits
Natural Gas to Liquefied Petroleum (Propane)
conversion kits (continued)
EVG 220 NG
P/N 383-900-054 LP to Natural Gas Conversion Kit contents:
511-050-212
Venturi - Natural Gas
1
562-150-292
Screw Pan Hd T20 M4x12 w/Square Cone Lock Washer
3
562-248-765
Washer .89 ID x 1.19 OD Garlock
1
590-318-102
O-Ring 3mm x 70mm Black
1
590-318-103
Gasket 1-Lips EPDM Ring 60 Dia MM
1
550-225-336
Label Gas Conversion
1
550-142-160
Instructions Conversion LP to Natural Gas
1
EVG 299/300 NG
P/N 383-900-055 LP to Natural Gas Conversion Kit contents:
511-050-215
Venturi - Natural Gas
1
562-150-292
Screw Pan Hd T20 M4x12 w/Square Cone Lock Washer
3
562-248-765
Washer .89 ID x 1.19 OD Garlock
1
590-318-102
O-Ring 3mm x 70mm Black
1
590-318-103
Gasket 1-Lips EPDM Ring 60 Dia MM
1
550-225-336
Label Gas Conversion
1
550-142-160
Instructions Conversion LP to Natural Gas
1
EVG 399 NG
P/N 383-900-056 LP to Natural Gas Conversion Kit contents:
511-050-216
Venturi - Natural Gas
1
562-150-292
Screw Pan Hd T20 M4x12 w/Square Cone Lock Washer
3
562-248-765
Washer .89 ID x 1.19 OD Garlock
1
590-318-102
O-Ring 3mm x 70mm Black
1
590-318-103
Gasket 1-Lips EPDM Ring 60 Dia MM
1
550-225-336
Label Gas Conversion
1
550-142-160
Instructions Conversion LP to Natural Gas
1
