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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 hot water 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.
WHAT TO DO IF YOU SMELL GAS
• 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.
JVH
WARNING
Installation and
Operation Instructions for
M
Residential
Gas-Fired
Hydronic Boilers
Models JVH, JVS
Sizes 50-225
JVS
U.S. Patent No. 1,609,692
Canada Patent No. 383,318
Vent damper is optional in some provinces of Canada..
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d'incendie ou d'explosion
ou pour éviter tout dommage matériel, toute
blessure ou la mort.
Ne pas entreposer ni utiliser d'essence ni
d'autres vapeurs ou liquides inflammables dans
le voisinage de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d'allumer d'appareils.
• Ne touchez à aucun interrupteur. Ne pas
vous servir des téléphones dansle bâtiment
où vous vous trouvez.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur
de gaz, appelez le sservice des incendies.
L'installation et l'entretien doivent être assurés
par un installateur ou un service d'entretien
qualifié ou par le fournisseur de gaz.
Document 1254
-T
ini
herM
AVERTISSEMENT
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Related Manuals for Laars Mini-Therm JVH
Summary of Contents for Laars Mini-Therm JVH
- Page 1 Installation and Operation Instructions Document 1254 Installation and Operation Instructions for herM Residential Gas-Fired Hydronic Boilers Models JVH, JVS Sizes 50-225 U.S. Patent No. 1,609,692 Canada Patent No. 383,318 Vent damper is optional in some provinces of Canada.. 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 hot water boiler installation and maintenance.
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Page 2: Table Of Contents
Page 2 LAARS Heating Systems TABLE OF CONTENTS SECTION 1. SECTION 6. General Information Electrical Wiring ...........20 Introduction ............3 Outdoor Reset ..........20 Warranty ............3 Heater Identification ........4 SECTION 7. SECTION 2. Filling the System ........23 Boiler Assembly & Placement SECTION 8. -
Page 3: General Information
SECTION 1. General Information 1B. Warranty 1A. Introduction The Laars Model JV boilers are covered by a limited This manual provides information necessary for the warranty. The owner should fill out the warranty installation, operation, and maintenance of the Laars registration card and return it to Laars. -
Page 4: Heater Identification
The Laars automatic vent dampers are standard on JVH has a hot surface ignition pilot and integral draft all JVS models. The Laars side wall power venters fan, and the JVS has an electronic intermittent ignition can be used on JVS models. Special instructions for device (I.I.D.). -
Page 5: Boiler Placement
Laars, is used. See the JVS servicing the damper. Parts List at the back of this manual for the appropriate Temperature/Pressure Gauge: Install the temp/ Noncombustible Base Kit part number. -
Page 6: Dimensional Information
Page 6 LAARS Heating Systems 2D. JVH Dimensional Information inches Dimensions in Size Water Connection Connection 13-3/8 3-1/8 2-7/8 1-1/4 13-3/8 2-1/4 1-1/4 16-7/8 5-3/4 2-7/8 1-1/4 16-7/8 5-1/2 1-1/4 1-1/4 20-3/8 7-1/4 1-1/4 25-5/8 JVH Dimensions 9 -1/4... - Page 7 Mini-Therm JV Page 7 2D. JVS Dimensional Information inches Dimensions in 9 -1/4 Water Conn Conn Size 1-1/4 13-3/8 340 27-3/4 23-5/8 21-3/4 550 26-1/2 1-1/4 13-3/8 340 27-3/4 24-1/8 21-3/4 550 27-1/2 1-1/4 16-7/8 430 28-3/4 24-1/8 22-3/4 580 27-1/2 1-1/4 16-7/8 430...
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Page 8: Clearance / Closet Installations
See Table 2JVH and Figure 1JVH for when it is closed. clearances required for the Mini-Therm JVH. See Table 2JVS and Figure 1JVS for Consult the American National Standard Z21.13 for clearances required for the Mini-Therm JVS more information concerning closet installations. -
Page 9: Air And Venting
Mini-Therm JV Page 9 SECTION 3. Air and Venting Boiler Size Outside Air Area Inside Air Area sq. in sq. in. sq. cm sq. cm 3A. Combustion Air Supply The boiler location must provide sufficient air supply for proper combustion, and ventilation of the surrounding area as outlined in the latest edition of U.S. -
Page 10: Venting
Page 10 LAARS Heating Systems 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 WALL OR PARAPET 10 (3.0) -
Page 11: Vertical Venting - Category I
Mini-Therm JV Page 11 of the pipe, which may cause excessive cooling and If a chimney rebuild is required, it shall conform condensation. to nationally recognized standards (see National Building Code or ANSI/NFPA 211). Vertical Venting - Category I The boiler must not be connected to a fireplace, (JVS and JVH) wood stove or other solid fuel burning All venting must comply with fuel gas code and... -
Page 12: Vent Terminations
Pitch down the vent run, toward the vent terminal (hood), 1/4” per foot (20mm per meter). Do not locate any joint screws at the bottom of the vent run. 3D-3. Vent Termination (JVH only) The side wall vent terminal (hood), Laars Part... -
Page 13: Common Venting System
Mini-Therm JV Page 13 Number D2004300 (4”) or D2000401 (6”), must be Insofar as it is practical, close all building doors used when the boiler is vented through a side wall. and windows and all doors between the space in It provides a means of installing vent pipe through which the appliances remaining connected to the common venting system are located and other... - Page 14 15-30m If a field conversion to a different altitude range or different gas should be necessary, conversion parts are available. Contact a Laars representative 100-200' 1-1/4 1-1/4 or the factory for the correct part numbers to...
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Page 15: Special Precautions For Lp
Mini-Therm JV Page 15 A sediment trap (drip leg) must be installed ahead of the gas controls (see Figure 8). Fit the 4B Special Precautions for LP Gas trap with a threaded cap which can be removed LP Gas is heavier than air and can therefore more for cleaning. - Page 16 Page 16 LAARS Heating Systems Multi-Zone Single Circuit System Valve System Primary Multi-Zone Secondary Pump Multi-Zone System Pump System Primary/Secondary Multi-Zone Valve System Primary/Secondary Multi-Zone Valve System Low Temperature Installation KEY: PUMP CHECK VALVE VALVE ZONE VALVE UNION AUTO AIR BLEEDER...
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Page 17: By-Pass Piping
120°F (44°C); or 3) whenever the system 5D Alternate Auto-Bypass Operation piping on the outlet side of the boiler may allow Use of the Laars thermostatic union, p/n 2400-030, reduced flow through the heat exchanger, causing can provide automatic bypass operation in primary excessive temperature rise (see Section 5.2). -
Page 18: Flow Requirements
Failure to insure proper water flow through the heat The JV boiler must not be direct connected to a exchanger of the boiler will void the Laars warranty. heating system utilizing oxygen permeable tubing. Flow can be verified by measuring the difference... - Page 19 120°+ Pump Isolation Pump Isolation Valve From Valve From System System Primary/Secondary Piping with Laars Primary/Secondary Piping with Variable Speed Injection Thermostatic Union as an Automatic Bypass NON-LOW TEMPERATURE SYSTEMS (120°F+ Return Temps) Tempering Isolation Valve Isolation Valve Valve System...
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Page 20: Electrical Wiring
Page 20 LAARS Heating Systems SECTION 6. 6A. Electrical Wiring Follow these instructions to make the necessary WARNING initial electrical connections. The boiler must be electrically grounded in Remove the two screws attaching the front cover accordance with the requirements of the authority of the control box. - Page 21 Mini-Therm JV Page 21...
- Page 22 Page 22 LAARS Heating Systems...
- Page 23 Mini-Therm JV Page 23 110 VAC 110 VAC TEMP CONTROL CONTROL TEMP BOILER PUMP CONTROL PUMP 5A MAX CONTROL INDUCER TRANSFORMER TRANSFORMER 110V FUSE TEMP CONTROL TEMP CONTROL FUSE TEMP GAS VALVE DAMPER CONTROL HI LIMIT TEMP CONTROL BLOCKED ROLLOUT ROLLOUT POWER VENTER VALVE...
- Page 24 Page 24 LAARS Heating Systems HEAT Wiring with Taco Zone Valves HEAT Wiring with Honeywell Zone Valves HEAT Wiring with Multiple Zone Pumps Figure 11. Multiple Zone Wiring.
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Page 25: Filling The System
Mini-Therm JV Page 25 SECTION 7. SECTION 8. Operating Procedures 7A Filling the System Before placing the boiler in operation, check and reset the safety shutoff devices. Once the boiler is It is crucial to the efficient operation of the system that all air be removed from the circuit. -
Page 26: Operating Instructions, Jvh
Page 26 LAARS Heating Systems 8C. Operating Instructions Mini-Therm JVH... -
Page 27: Operating Instructions, Jvs
Mini-Therm JV Page 27 8D. Operating Instructions Mini-Therm JVS... -
Page 28: Operating Temperature Control
(70 deg F - outdoor temp) is removed. Laars strongly recommends using a pump post purge. During WWSD and a call for HEAT is DHW Operation The boiler target for DHW calls present the pump will remain off. -
Page 29: Maintenance
Mini-Therm JV Page 29 HEAT and the control is in WWSD the HEAT call will when the draft inducer starts (depending on be ignored. When there is a call for DHW and the the boiler size, swing may be as little as 30°). control is in WWSD the DHW call will be satisfied. -
Page 30: Electrical Troubleshooting
Page 30 LAARS Heating Systems exchanger can be inspected by using a flashlight voltage is present, skip to step 8. If voltage isn’t and placing a mirror under the burners. An alternate present, connections or the draft inducer/motor method is to remove the venting and top panel to could be defective. - Page 31 Mini-Therm JV Page 31 Symptom Cause Remedy Pump not operating No power ..Check circuit breakers and power source. Replace. Recheck Pump defective ..wiring diagrams. Incorrectly wired ..Pilot outage Inlet gas pressure too low .
- Page 32 Page 32 LAARS Heating Systems Troubleshooting Honeywell SV9501/SV9601 Hot Surface Pilot System (JVH only) START • TURN GAS SUPPLY OFF CHECK: • SET THERMOSTAT TO • LINE VOLTAGE POWER CALL FOR HEAT • LOW VOLTAGE TRANSFORMER • LIMIT CONTROLLER SV9501/SV9601 IS •...
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Page 33: Glossary Of Terms
Mini-Therm JV Page 33 SECTION 10. Replacement Parts 10A Glossary of Terms Primary-Secondary Piping Air Vent A device used to purge air from the Circuit. Should be Two or more interconnecting circulating loops, located at the highest point in the Circuit. each with its own pump. -
Page 34: Parts List Jvh
Page 34 LAARS Heating Systems 10B Parts List JVH Mini-Therm JVH Size Description JVH-50 JVH-75 JVH-100 JVH-125 JVH-160 JVH-225 Gas System 1 Pilots Pilot Assembly (Nat.), Hot Surface RW2001800 RW2001800 RW2001800 RW2001800 RW2001800 RW2001800 Pilot Assembly (LP), Hot Surface RW2001900... - Page 35 Therm JVi Page 31 Page 35 (left side) (right side) ITEMS 14, 39 Figure 14A. JVH Parts Identification. AND INSULA TION NOT SHOWN...
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Page 36: Parts List Jvs
Page 36 LAARS Heating Systems 10C Parts List JVS Mini-Therm JVS Size Description JVS-50 JVS-75 JVS-100 JVS-125 JVS-160 JVS-225 Gas System 1 Pilots Pilot Assembly (Nat.) R0061600 R0061600 R0061600 R0061600 R0061600 R0061600 Pilot Assembly (LP) W0039600 W0039600 W0039600 W0039600 W0039600... - Page 37 Mini-Therm JVS Page 37 (on left side) Figure 14B. JVS Parts Identification.
- Page 38 (Customer Service, Service Advisors) 20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering) 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1208 Document 1254...
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