Weil-McLain Evergreen EVG 220 Manual page 13

®
gas
Gas conversions
Natural Gas to Liquefied Petroleum (Propane)
conversion kits (continued)
EVG 299/300 LP P/N 540-202-841 NG to Propane Gas Conversion Kit contents:
511-050-220 Venturi - Liquefied Petroleum (Propane) Gas
562-150-292 Screw Pan Hd T20 M4x12 w/Square Cone Lock Washer
562-248-765 Washer .89 ID x 1.19 OD Garlock
590-318-102 O-Ring 3mm x 70mm Black
590-318-103 Gasket 1-Lips EPDM Ring 60 Dia MM
550-225-336 Label Gas Conversion
550-142-871 Instructions Conversion Nat to LP Gas
EVG 399 LP P/N 540-202-842 NG to Propane Gas Conversion Kit contents:
511-050-221 Venturi - Liquefied Petroleum (Propane) Gas
562-150-292 Screw Pan Hd T20 M4x12 w/Square Cone Lock Washer
562-248-765 Washer .89 ID x 1.19 OD Garlock
590-318-102 O-Ring 3mm x 70mm Black
590-318-103 Gasket 1-Lips EPDM Ring 60 Dia MM
550-225-336 Label Gas Conversion
550-142-871 Instructions Conversion Nat to LP Gas
Liquefied Petroleum (Propane) to Natural Gas
conversion kits
EVG 220 NG P/N 383-900-054 LP to Natural Gas Conversion Kit contents:
511-050-212 Venturi - Natural Gas
562-150-292 Screw Pan Hd T20 M4x12 w/Square Cone Lock Washer
562-248-765 Washer .89 ID x 1.19 OD Garlock
590-318-102 O-Ring 3mm x 70mm Black
590-318-103 Gasket 1-Lips EPDM Ring 60 Dia MM
550-225-336 Label Gas Conversion
550-142-160 Instructions Conversion LP to Natural Gas
EVG 299/300 NG P/N 383-900-055 LP to Natural Gas Conversion Kit contents:
511-050-215 Venturi - Natural Gas
562-150-292 Screw Pan Hd T20 M4x12 w/Square Cone Lock Washer
562-248-765 Washer .89 ID x 1.19 OD Garlock
590-318-102 O-Ring 3mm x 70mm Black
590-318-103 Gasket 1-Lips EPDM Ring 60 Dia MM
550-225-336 Label Gas Conversion
550-142-160 Instructions Conversion LP to Natural Gas
EVG 399 NG P/N 383-900-056 LP to Natural Gas Conversion Kit contents:
511-050-216 Venturi - Natural Gas
562-150-292 Screw Pan Hd T20 M4x12 w/Square Cone Lock Washer
562-248-765 Washer .89 ID x 1.19 OD Garlock
590-318-102 O-Ring 3mm x 70mm Black
590-318-103 Gasket 1-Lips EPDM Ring 60 Dia MM
550-225-336 Label Gas Conversion
550-142-160 Instructions Conversion LP to Natural Gas
Part number 550-100-131/0120
-
fired water boiler
(continued)
— 220/299/300/399 Boiler Manual
• Follow all instructions in proper order.
• Do not tamper with venturi. DO NOT change or modify
venturi in any way.
1
• Dispose of an uninstalled venturi; do not leave in the building.
3
• Caution – the gas supply shall be shut off prior to discon-
1
necting the electrical power, before proceeding with the
1
conversion.
1
• Whenever the venturi is removed, all gaskets must be replaced
with new gaskets.
1
1
Pipe sizing for propane gas
1. Contact gas supplier to size pipes, tanks and 100% lockup
gas pressure regulator.
1
3
Natural and Propane supply pressure
1
1. Adjust propane supply regulator provided by gas supplier
1
between the pressure listed below:
1
2. Pressure required at gas valve inlet pressure port:
1
1
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.
Installing propane venturi —
1. Propane venturi will have a black label identifying venturi
1
part number. See Figure 8, page 12 for correct part number.
3
2. Verify that the label on the propane venturi is correct for the
1
model size (see Figure 9 below).
1
3. If the jacket front door was not already removed, remove it.
1
1
1
Figure 9
Propane gas venturi label identification
(Black label)
Boiler
1
Model
3
1
EVG 220
1
EVG 299/300
1
EVG 399
1
1
Figure 10
Natural gas venturi label identification
(White label)
1
Boiler
3
Model
1
EVG 220
1
EVG 299/300
1
1
EVG 399
1
Part Number Gas Type
511-050-219 LPG
511-050-220 LPG
511-050-221 LPG
Part Number Gas Type
511-050-212 NG
511-050-215 NG
511-050-216 NG
Venturi Ø
30
34
38
Venturi Ø
30
34
38
– 13 –