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HydroTherm VGA-175B Installation, Operation & Maintenance Manual And Replacement Parts List

Vgab-series gas-fired steam cast iron boilers 175,000 to 400,000 btuh input
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VGAB-SERIES
INSTALLATION,
OPERATION &
MAINTENANCE MANUAL
AND REPLACEMENT

PARTS LIST

Gas-Fired Steam Cast Iron Boilers
175,000 to 400,000 Btuh Input
Standing Pilot,
Standing Pilot & Vent Damper,
Intermittent Pilot and Intermittent Pilot
& Vent Damper
Code Compliance. ....................................................2
Venting Requirements ..............................................3
Chimney Requirements ............................................3
Combustion Air Requirements ..................................3
Water Treatment........................................................4
Shipment of Boiler ....................................................4
Step 1: Locating/Setting Boiler..................................5
Step 2: Installing Steam Piping ................................6
Step 4: Venting Boiler................................................7
IN UNITED STATES: 260 NORTH ELM ST., WESTFIELD, MA 01085 • (413) 564-5515 FAX (413) 568-9613
IN CANADA: 7555 TRANMERE DRIVE, MISSISSAUGA, ONTARIO L5S 1L4 • (905) 672-2991 FAX (905) 672-2883
Step 5: Installing/Testing Gas Piping ......................10
Step 6: Wiring Boiler ..............................................11
Sequence Of Operation ..........................................16
Prior To Start-Up ....................................................16
Start-Up & Adjustments ..........................................16
Before Each Heating Season..................................20
How To Change Orifices ........................................21
Heating System Problems & Causes ......................21
Replacement Parts List ..........................................22
VGAB2-501
42-9117

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  • Page 1: Table Of Contents

    VGAB2-501 42-9117 VGAB-SERIES INSTALLATION, OPERATION & MAINTENANCE MANUAL AND REPLACEMENT PARTS LIST Gas-Fired Steam Cast Iron Boilers 175,000 to 400,000 Btuh Input Standing Pilot, Standing Pilot & Vent Damper, Intermittent Pilot and Intermittent Pilot & Vent Damper Step 5: Installing/Testing Gas Piping ......10 SECTION 1: INTRODUCTION Step 6: Wiring Boiler ..........11 Code Compliance.

  • Page 2: Section 1: Introduction

    NOTE: SPILL & ROLLOUT SWITCHES DIMENSIONS BOILER USED ON VGA-175 THRU VGA-250. MODEL * FOR MODELS SUPPLIED WITH VENT VGA-175B 22 1/2" 18" 10 1/2" 7" 25" DAMPER ADD 3 5/8" TO DIM. E VGA-200B 22 1/2"...

  • Page 3: Venting Requirements

    VENTING REQUIREMENTS 7. Any improper operation of the common venting sys- tem should be corrected so the installation conforms When connecting to gas vents or chimneys, vent instal- with National Fuel Gas Code, ANSI Z223.1-latest lations shall be in accordance with Part 7, Venting of edition.

  • Page 4: Water Treatment

    NOTE: Boiler employs atmospheric combustion. SHIPMENT OF BOILER Combustion air must not be contaminated with Each boiler is shipped in a single carton. Draft hood is halogenated hydrocarbon vapors, aerosol shipped in a separate carton. propellants or freon. Otherwise, boiler heat exchanger will be subject to corrosion, reducing Optional Vent Damper boiler life.

  • Page 5: Section 2: Boiler Installation

    SECTION 2: BOILER INSTALLATION STEP 1: LOCATING AND SETTING THE BOILER ➤PROCEDURE A: Check that provisions for combustion air are in accordance with National Fuel Gas Code ANSI Z223.1-latest edition and all applicable local codes. In Canada, follow CAN/CGA B149.1 or .2 installation codes.

  • Page 6: Step 2: Installing Steam Piping

    ➤PROCEDURE C: Check component positioning. 1. Remove all packing material from boiler. 2. Install on non-combustible floor only, unless local codes permit 6" OVERHANG OF BLOCK AND SHEETMETAL ALL AROUND use and fabrication of a fireproof base (see Fig. 2.2). 4"...

  • Page 7: Step 3: Installing Hydronic Components

    Spill switches are provided on Model VGA-175B, VGA-200B &VGA-250B boilers. Applicable boiler is equipped with a factory-mounted spill switch harness/mounting bracket assembly;...
  • Page 8 The flue or vent connectors must be installed flush with Remove hairpin shipping clip which holds damper blade the inside chimney liner surface and sealed in place with in closed position and observe that damper blade furnace cement. Horizontal portions of the single wall rotates slowly to open position.
  • Page 9 of the largest flue plus 50% of the areas of the additional flue ATTACH LOWER or vent connectors. PORTION OF VENT DAMPER When an existing boiler is removed from a common venting TO DRAFTHOOD OUTLET WITH 1/2" system, common venting system is likely to be too large for OR SHORTER proper venting of appliances remaining connected to it.

  • Page 10: Step 5: Installing/Testing Gas Piping

    STEP 5: INSTALLING & TESTING GAS PIPING Connect the gas piping from the meter to the boiler Install a full-sized sediment trap at the low point in gas using a pipe size which will result in a pressure drop of line upstream of gas valve.

  • Page 11: Step 6: Wiring Boiler

    Testing Gas Piping RISER TO OTHER BEAM APPLIANCES DANGER: Before placing gas piping into service, carefully test it to assure every joint is gas tight. Bubble test all joints with a soap solution. NEVER PIPE CLAMP TEST WITH AN OPEN FLAME AS FIRE OR EXPLOSION WILL RESULT.
  • Page 12 For vent damper-equipped models, connect thermostat relays, etc.) Otherwise, transformer will be overloaded and burn out. to blue leads (see Figure 2.6). CAUTION: Label all wire prior to disconnection NOTE: If any of original wire supplied with boiler when servicing controls. Wiring errors can cause must be replaced, use similar wire of 105 C rating.
  • Page 13 OPERATING SEQUENCE STEAM BOILERS EQUIPPED WITH VENT DAMPER, CG-400 SERIES LWCO AND IID 1. MOTOR DRIVES VENT DAMPER TO CLOSED POSITION AND REMAINS CLOSED DURING STANDBY. 2. SENSING CIRCUIT IS CONTINUOUSLY MONITORED. 3. THERMOSTAT (OR OPERATING CONTROL) CALLS FOR HEAT. 4.
  • Page 14 OPERATING SEQUENCE FOR SREAM BOILERS EQUIPPED WITH STANDING PILOT, VENT DAMPER HI-LIMIT & CG-400 SERIES LWCO 1. MOTOR DRIVES VENT DAMPER TO CLOSED POSITION AND REMAINS CLOSED DURING STANDBY. 2. STANDING PILOT REMAINS LIT. 3. SENSING CIRCUIT IS CONTINUOUSLY MONITORED. 4.
  • Page 15 OPERATING SEQUENCE FOR SREAM BOILERS EQUIPPED WITH STANDING PILOT, VENT DAMPER, HI-LIMIT, ECO & CG-400 SERIES LWCO 1. MOTOR DRIVES VENT DAMPER TO CLOSED POSITION AND REMAINS CLOSED DURING STANDBY. 2. STANDING PILOT REMAINS LIT. 3. SENSING CIRCUIT IS CONTINUOUSLY MONITORED. 4.

  • Page 16: Section 3: Start-Up & Operation

    23" from the surface on which the boiler sits. Spill and rollout switches are mounted on Model SYSTEM START-UP & ADJUSTMENTS VGA-175B, VGA-200B & VGA-250B boilers. Safe lighting and other performance criteria were met with the gas manifold and control assembly provided on...
  • Page 17 If this is the air. Do not operate the boiler until the problem is case, local utility or Hydrotherm may recommend solved or severe personal injury or death may occur! orifices be changed. When changing orifices follow the procedures detailed in Section 4 of this manual.

  • Page 18: Operating Instructions

    WARNING: If you do not follow these instructions exactly, a fire or explosion may result with property damage, personal injury, or loss of life. A. BEFORE OPERATING smell all around the appliance B. Use only your hand to push in or turn the gas control area for gas.

  • Page 19: Section 4: Maintenance

    TO TURN OFF GAS TO APPLIANCE 1. Set the thermostat to lowest setting. 3. Turn gas control knob counterclockwise to "OFF". Do 2. Turn off all electric power to the appliance if service is to be not force. performed. SECTION 4: MAINTENANCE 3.

  • Page 20: How To Change Orifices

    4. All orifices are screwed into the manifold and may be removed by using a 5/8" wrench or socket. 5. Reverse procedures above to install orifices and burners. BE SURE TO REINSTALL BURNERS WITH BURNER PORTS ON TOP SURFACE (UPRIGHT). Boiler VGA-175B VGA-200B VGA-250B VGA-3000B VGA-350B VGA-400B Model (1) Nat.
  • Page 21 MODEL VGA-B SERIES REPLACEMENT PARTS LIST ORDERING INFORMATION When ordering replacement parts, provide the model and serial number shown on the unit rating plate as well as the part number and name as shown in the parts list. Parts may be obtained from your local Hydro- therm heating contractor.

  • Page 22: Replacement Parts List

    NAME OF PART PART NO. 175B 200B 250B 300B 350B 400B Burner Support Bracket 03-7369 Burner Support Bracket 03-7370 Burner Support Bracket 03-7371 Burner Support Bracket 03-7372 Burner Support Bracket 03-7373 Jacket Support Bracket - Front 03-7135 Jacket Support Bracket - Rear 03-7136 —...
  • Page 23 JACKET ASSEMBLY 48/49 30/31...
  • Page 24 NAME OF PART PART NO. 175B 200B 250B 300B 350B 400B Section, Rear BM-9677 Section, Intermediate BM-9693 Section, Front (No Coll Opening) BM-9678 Abs. Unit Ass'y BM-3162 Abs. Unit Ass'y BM-3163 Abs. Unit Ass'y BM-3164 Abs. Unit Ass'y BM-3165 Abs. Unit Ass'y BM-3166 Port Seal - 5"...
  • Page 25 NAME OF PART PART NO. 175B 200B 250B 300B 350B 400B — Jacket-Complete BM-2676 Jacket-Complete BM-2677 Jacket-Complete BM-2678 Jacket-Complete BM-2679 Jacket-Complete BM-2680 Manual Reset Spill Switch* 58-2526 Rollout Switch (Thermal Fuse)* 58-1893 *These components are not used on Multi-Temp modules (VGAM).
  • Page 26 PARTS FOR HONEYWELL INTERMITTENT PILOT SYSTEM (SEE DIAGRAM BELOW) NAME OF PART PART NO. 175B 200B 250B 300B 350B 400B Gas Valve - Nat. VR8304P 3332 02-1556 Gas Valve - Nat. VR8304P 3/4" 02-1554 Gas Valve - LP VR8304P 3340 02-1561 Gas Valve - LP VR8304P 4330 02-1555...
  • Page 28 IN UNITED STATES: 260 NORTH ELM ST., WESTFIELD, MA 01085 • (413) 564-5515 FAX (413) 568-9613 IN CANADA: 7555 TRANMERE DRIVE, MISSISSAUGA, ONTARIO L5S 1L4 • (905) 672-2991 FAX (905) 672-2883...

This manual is also suitable for:

Vga-200bVga-350bVga-400bVga-250bVga-300b

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