SECTION 1: INTRODUCTION

CODE COMPLIANCE

Boiler installations must conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, to the National Fuel Gas Code ANSI Z223.1-latest edition. Where required by the authority having jurisdiction, the installation must also conform to the Standard for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-1.

All electrical wiring must be in accordance with National Electric Code ANSI/NFPA No.70-latest edition and any additional state or local code requirements. If an external source is utilized, boiler, when installed, must be electrically grounded in accordance with

requirements of the authority having jurisdiction or, in the absence of such requirements, with the National Electrical Code, ANSI/NFPA No.70-latest edition. UL listed power limited circuit cable is almost universally approved for safety controls on heating equipment, either internally or externally, without protection of conduits or raceway.

For Canada, the installation must be in accordance with Standards CGA B149.1 and B149.2 Installation Codes for Gas Burning Appliances and Equipment and/or local codes. All electrical connections are to be made in accordance with Standard C.S.A. C22.1 Canadian Electrical Code, Part 1 and/or local codes.

 

BOILER

 

 

DIMENSIONS

 

 

FOR MODELS SUPPLIED WITH VENT

 

 

 

 

 

 

 

DAMPER ADD 3 5/8" TO DIM. E

 

 

MODEL

A

B

C

D

E

 

 

 

 

 

GB250-S-5L

22 1/2"

18"

10 1/2"

7"

25"

 

 

 

GB250-S-5H

22 1/2"

18"

10 1/2"

7"

25"

 

 

 

GB250-S-6

26"

21 1/2"

12 1/2"

8"

30"

 

 

 

GB250-S-7

29 1/2"

25"

14"

8"

30"

 

 

 

GB250-S-8

29 1/2"

28 1/2"

15 1/2"

9"

37"

 

 

 

GB250-S-9

36 1/2"

32"

17 1/2"

9"

37"

 

 

 

SPILL SWITCH

 

 

 

D

 

 

 

 

 

 

 

 

 

 

PRESSURE CONTROL

 

 

 

 

 

*E

 

 

 

PRESSURE

 

 

 

 

 

 

3"

 

RELIEF VALVE

 

B

 

 

 

 

 

 

 

 

 

 

9 3/8"

3" STEAM

 

 

 

 

 

 

SUPPLY

 

 

 

 

 

PRESS.

 

 

 

 

 

 

8 15/16"

 

 

 

 

C

 

 

GAUGE

1/2" PLUGGED

 

 

3/4" PLUGGED

 

 

 

 

 

 

 

 

TAPPING

 

 

 

 

 

 

 

 

 

TAPPING

 

 

 

 

 

 

 

 

 

LOW

 

 

 

 

 

WATER

 

 

WATER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

31 1/2" CUT-OFF

 

 

 

 

 

LINE

 

 

 

 

3 3/4"

 

 

 

 

 

 

 

 

 

 

 

 

2 1/2"

 

 

 

 

 

 

 

26 7/8"

 

 

 

 

 

 

 

 

2 1/2"

 

23 1/4"

 

 

ROLLOUT SWITCH

 

23 7/8"

 

 

 

 

 

 

 

 

 

 

28 1/2"

 

 

 

 

21"

 

 

 

 

 

23 1/4"

 

 

 

 

 

 

 

 

20"

 

 

TRANSF.

 

 

2" RETURN

 

14 3/4"

 

 

 

 

 

 

 

115/24V

 

 

REAR

14 3/4"

 

 

 

 

 

 

 

 

 

 

 

 

18 1/4"

 

 

 

 

GAS VALVE

 

 

 

 

2" RETURN

16 1/2"

 

6 3/4"

 

A

18 1/8"

 

21 7/8"

 

 

 

 

 

 

 

FRONT

 

 

 

 

 

 

 

 

 

-LEFT SIDE VIEW-

 

 

 

-FRONT VIEW-

-RIGHT SIDE VIEW-

 

PROBE LOCATION FOR ELECTRIC LWCO.

The following terms are used throughout this manual to bring attention to the presence of potential hazards or to important information concerning the product:

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death, serious injury or substantial property damage.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death, serious injury or substantial property damage.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor injury or property damage.

NOTE: Used to notify of special instructions on installation, operation or maintenance which are important to equipment but not related to personal injury hazards.

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