Weil-McLain CG25 사용자 설명서

Burner Specification & Data sheet — Beckett Gas Burners

Part No. 550-142-027/0508

Standard motor voltage is 120/60/1 for CG10, CG25 , and

230/60/1 for CG50.
Direct Spark Ignition is standard on all models.

CG10 models are available only as OO (On-Off operation) or

LFS (Low fire start, high fire run. Single position air, adjust-

able opening gas valve).
CG25 and CG50 are available as: LHL Low-high-low-off

operation. Two position air controlled by linkageless damper

actuator, fixed damper pre-purge.

Must be wired with boiler temperature or pressure control

•

switch or operation will be low-high-off.
MOD – On-off operation with proven low fire start and

•

full modulating firing conditions with combustion air

control.
Modulation control drives combustion air damper and

•

fuel metering valve in response to boiler demand. Fixed

damper pre-purge for RM 7897C.
Open damper pre-purge for RM7840L.

•
Burner capacities listed for elevations up to 2,000 feet. For

higher elevations, consult local Weil-McLain distributor/

agent or sales office.
Gas ratings based on natural gas with heating value of 1,000

btu per cubic foot and specific gravity of 0.60.
Boiler-burner unit to be adjusted to achieve +0.10 inches

W.C. pressure at flue collar, resulting in positive pressure in

firebox as listed.

Minimum gas pressures listed are subject to variations due

to job conditions. Gas burners for other gas pressures are

available. Consult local Weil-McLain distributor/agent or

sales office.
Gas manifold pressures shown are for initial start-up. Final

pressure should be determined after checking actual gas flow

and combustion readings.
Combustion Controls:

10.

RM7897 flame safeguard control uses ultraviolet elec-

tronic flame detector to monitor gas burner flame, and

provides pre-purge programming. “C” models provide

10 second main flame establishing period.
RM7840L flame safeguard control monitors the gas

burner flame, provides pre-purge and post-purge pro-

gramming, provides switching necessary to allow firing

rate motor to be driven to both low fire start and high fire

positions, prevents start-up if preignition interlock circuit

or running interlock circuit does not “prove”, system will

lock out on safety. Ultraviolet sensitive electronic flame

detector is standard.

Burners listed by Underwriters Laboratories, Inc., Canadian

11.

Gas Association, state of Connecticut, Fire Marshal state of

Massachusetts, city of New York MEA, and others.
Special controls can be provided to meet other code require-

12.

ments not listed. Consult your local Weil-McLain distributor/

agent or sales office.

Notes for Table 1 and Table 2

Burner specifications and settings

(continued)

Gas train components and flame safeguards

Table 2

Standard Gas Control Components and Sizes in Inches

Boiler

Model

Number

Manual

Hand Valve

(Field Gas Train

Connection)

Combination

Diaphragm

Operating Gas Valve

And Regulator

Safety

Gas Valve

Manual Checking

Gas Valve

488R-488

588 & 688

1-1/4

788-988

1-1/2

1088R-1288

1388

2-1/2

Flame Safeguard Provided with Listed Control Systems by Code

Boiler

Model

Number

UL/ CSD1

IRI

OO or LFS

LHL

MOD

OO or LFS

LHL

MOD

OO or LFS

LHL

MOD

488R-488

RM7897A

588-1388

RM7897C

RM7840L

RM7897C

RM7840L

RM7897C

RM7840L

Additional control suppliers are available