Laars Mini-Therm JVi JVH Installation And Operation Instructions Manual
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Laars Mini-Therm JVi JVH Installation And Operation Instructions Manual

Laars Mini-Therm JVi JVH Installation And Operation Instructions Manual

Induced draft residential gas-fired hydronic boilers
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Installation and Operation Instructions
These instructions are to be stored next to the boiler for reference purposes.
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualified in hydronic boiler installation and maintenance. Improper installation and/or operation could
create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death.
Improper installation and/or operation will void the warranty.
If the information in this manual is not followed exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a nearby phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service agency, or gas
supplier.
Installation and
Operation
Instructions for
Mini-Therm JVi
WARNING
WHAT TO DO IF YOU SMELL GAS
Induced Draft
Residential
Gas-Fired
Hydronic Boilers
Models JVH, JVP
Document 1080C

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Summary of Contents for Laars Mini-Therm JVi JVH

  • Page 1: Installation And Operation

    Installation and Operation Instructions Document 1080C Installation and Operation Instructions for Mini-Therm JVi Induced Draft Residential Gas-Fired Hydronic Boilers Models JVH, JVP These instructions are to be stored next to the boiler for reference purposes. FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician, qualified in hydronic boiler installation and maintenance.

  • Page 2: Table Of Contents

    LAARS HEATING SYSTEMS Page 2 TABLE OF CONTENTS SECTION 1. SECTION 2. General Information Operating Procedures Introduction ........... 3 System Start-up .......... 15 Warranty ............3 Sequence of Operation ......17 Heater Identification ........3 SECTION 3. Flow Requirements ........3 Boiler Placement ..........

  • Page 3: General Information

    Laars warranty will be voided. Shipping costs are not included in the warranty The installation must conform to the requirements coverage.

  • Page 4: Boiler Placement

    (51) (102) Failure to insure proper water flow through the (51) heat exchanger of the boiler will void the Laars warranty. Flow can be verified by measuring the difference in water temperatures between the boiler VIEW inlet (system return) and outlet (system supply). For example: For a JV-100 installation, the inlet water temperature is 160°F (71ºC), and the outlet temp-...

  • Page 5: Combustion Air Supply

    Mini-Therm JVi Page 5 are normally equipped to operate below a 2000' Distance Boiler Size (610m) altitude. Boilers equipped to operate at From higher altitudes have appropriate stickers or tags Meter in attached next to the rating plate. Inches Feet (m) 0-50' Use the figures in Table 5 to provide adequate (0-15)

  • Page 6: Venting

    LAARS HEATING SYSTEMS Page 6 U.S. ANSI standard Z223.1 or in Canada, CAN/CGA- Exhaust Fans or Vents: Any equipment which B149.1 or .2, and any local codes that may be exhausts air from the boiler room can deplete the applicable.

  • Page 7: Vertical Venting - Category I

    Mini-Therm JVi Page 7 Do not weld the vent pipe to the boiler collar. minimum 12" (305mm) height above the boiler, is The weight of the stack must not rest on the boiler. recommended. The vent system should be sloped up The boiler top must be easily removable for normal toward the chimney 1/4"...

  • Page 8: H-2. Horizontal Venting - Category Iii

    LAARS HEATING SYSTEMS Page 8 10 (3.0) OR LESS MORE THAN 10 (3.0) 2 (0.6) MIN. 3 (0.9) 3 (0.9) MIN. MIN. WALL OR WALL OR PARAPET TERMINATION PARAPET CHIMNEY 10 FT. (3.0m) CHIMNEY OR LESS FROM RIDGE, NOTE: NO HEIGHT 10 (3.0)

  • Page 9: Common Venting System

    Vent Termination 1H-3. Common Venting System The side wall vent terminal (hood), Laars Part Number D2004300 (4") or D2000401 (6"), must be When an existing boiler is removed from a used when the boiler is vented through a side wall. It...

  • Page 10: Water Piping Of Boiler System

    Place in operation the appliance being inspected. A properly sized expansion tank must be Follow the lighting instructions. Adjust included in the system. Laars offers an air-charged thermostat so appliance will operate diaphragm-type expansion tank, with an automatic continuously.
  • Page 11 Mini-Therm JVi Page 11 Multi-Zone Valve System Single Circuit System Primary Secondary Multi-Zone Multi-Zone Pump Pump System System Primary/Secondary Multi-Zone Valve System Primary/Secondary Multi-Zone Valve System Low Temperature Installation Figure 9. Typical Plumbing Installations. KEY: PUMP CHECK VALVE VALVE ZONE VALVE UNION AUTO AIR BLEEDER...

  • Page 12: Electrical Wiring

    LAARS HEATING SYSTEMS Page 12 Field installed safety devices and operating 1K. Electrical Wiring controllers, such as valve end switches, relays, timers, Follow these instructions to make the necessary and outdoor temperature reset devices, can be initial electrical connections. connected to the boiler through the wall thermostat Remove the two screws attaching the front cover circuit.
  • Page 13 Mini-Therm JVi Page 13 Figure 10. Wiring Diagram, JVH. Figure 11. Wiring Diagram, JVP.

  • Page 14: Zone Valves

    LAARS HEATING SYSTEMS Page 14 Wiring with Taco Zone Valves Wiring with Honeywell Zone Valves Wiring with Multiple Zone Pumps For primary/secondary pumping: Connect to "W" in lieu of "A." Boiler relay is used for boiler pump and connection to "W" will energize boiler pump when any zone is calling for heat.

  • Page 15: Operating Procedures

    Mini-Therm JVi Page 15 12. Close the water makeup valve and check the SECTION 2. strainer in the pressure reducing valve for Operating Procedures sediment or debris. Reopen the water makeup valve. Before placing the boiler in operation, check and 13.

  • Page 16: System Start-Up

    LAARS HEATING SYSTEMS Page 16 The pilot and main burners will automatically Boiler Firing Systems Valve Manufacturer Size Natural or Propane Number ignite when there is a call for heat. Hot Surface Pilot, SV9500 & Honeywell SV9600 2B. Sequence of Operation 50-225 Wall thermostat will call for heat.
  • Page 17 Mini-Therm JVi Page 17 FOR YOUR SAFETY, READ BEFORE OPERATING WARNING If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury, or loss of life. A. This boiler is equipped with an ignition device •...

  • Page 18: Maintenance

    LAARS HEATING SYSTEMS Page 18 SECTION 3. depends on their proper functioning. It is strongly recommended that the basic items listed 3A. Maintenance below be inspected by a qualified service Lubricate the water circulating pump per the technician every year.

  • Page 19: Electrical Troubleshooting

    Mini-Therm JVi Page 19 switch, check for defective hi-limit, open circuit 3B. Electrical Troubleshooting due to excessive water temperature, or a low Remove the control box cover on the front of the temperature setting. boiler. Place the second lead on the blue wire terminal Verify that 115 volts is reaching the boiler by on the fan proving switch.
  • Page 20 LAARS HEATING SYSTEMS Page 20 Symptom Cause Remedy Pump not operating No power ..Check circuit breakers and power source. Pump defective ..Replace. Incorrectly wired ..Recheck wiring diagrams.
  • Page 21 Mini-Therm JVi Page 21 Troubleshooting Honeywell SV9501/SV9601 Hot Surface Pilot System START • TURN GAS SUPPLY OFF CHECK: • SET THERMOSTAT TO • LINE VOLTAGE POWER CALL FOR HEAT • LOW VOLTAGE TRANSFORMER • LIMIT CONTROLLER SV9501/SV9601 IS • THERMOSTAT POWERED •...
  • Page 22 LAARS HEATING SYSTEMS Page 22 Troubleshooting Honeywell S8600 Intermittent Pilot System (Spark Ignition) Some models are equipped with lockout/retry modules. On L.P.G. models, trial for ignition last 15 seconds followed by 5 minutes lockout, then the cycle repeats. START NOTE: Before troubleshooting, familiarize yourself with the start-up and checkout Turn off gas supply.
  • Page 23 Mini-Therm JVi Page 23 Glossary of Terms Air Vent Primary-Secondary Piping A device used to purge air from the Circuit. Should be Two or more interconnecting circulating loops, each located at the highest point in the Circuit. with its own pump. Primary =System Circuit; Secondary=Boiler Circuit.
  • Page 24 LAARS HEATING SYSTEMS Page 24 Part Number Description Model, Size JVH-50 JVP-50 JVH-75 JVP-75 JVH-100 JVP-100 Pilot Gas System Pilot Assembly (Nat.), Hot Surface W2001800 — W2001800 — W2001800 — Pilot Assembly (LP), Hot Surface W2001900 — W2001900 — W2001900 —...
  • Page 25 Mini-Therm JVi Page 25 Part Number Description Model, Size JVH-125 JVP-125 JVH-160 JVP-160 JVH-225 JVP-225 1. Pilot Gas System Pilot Assembly (Nat.), Hot Surface W2001800 — — W2001800 — — Pilot Assembly (LP), Hot Surface W2001900 — — W2001900 — —...
  • Page 26 LAARS HEATING SYSTEMS Page 26 Flue Collector Insulation Rear Top Insulation 1-1/4 Tee Rear Panel Insulation Side Panel Insulation 1/2" Close Nipple 1/2" Coupling (Model 50 & 100) Front Panel Insulation *Items 13, 14, 15 and 30 are not shown...
  • Page 27 Mini-Therm JVi Page 27...
  • Page 28 6000 Condor Drive, Moorpark, CA 93021 • 805.529.2000 • FAX 805.529.5934 20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • FAX 603.335.3355 480 S. Service Road West, Oakville, Ontario, Canada L6K 2H4 • 905.844.8233 • FAX 905.844.2635 www.laars.com Litho in U.S.A. © Laars Heating Systems 0005 Document 1080C...

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