Laars Mini-Therm II JV Installation And Operation Instructions Manual Download | Manualshive

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Mini-Therm II Hydronic Boiler

Page 13

Figure 10. Multiple Zone Wiring.

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.

Wiring
with Taco
Zone Valves

Wiring with
Honeywell
Zone Valves

Wiring
with Multiple
Zone Pumps

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Summary of Contents for Mini-Therm II JV

Page 1: ...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 T...

Page 2: ...1H Venting 7 1H 1 Common Venting System 8 1I Water Piping of Boiler System 8 1I 1 By pass Piping 8 1J Chilled Water Systems 10 1K Electrical Wiring 10 1L Filling the System 12 SECTION 2 Installation...

Page 3: ...installation Consult the Laars factory or local factory representative with any problems or questions regarding this equipment Experience has shown that most operating problems are caused by improper...

Page 4: ...Temperature rise must be measured with the longest highest head zone calling for heat alone Other factors to be considered before selecting a pump are pipe size the number of fittings throughout the s...

Page 5: ...gas piping from the gas meter to the boiler 3 A trap drip leg must be provided ahead of the gas controls see Figure 4 A manual gas shutoff valve must also be provided for service convenience and safe...

Page 6: ...an indication of an undersize gas meter and or obstructed gas supply line 5 The correct burner manifold gas pressure is stamped on the rating plate The regulator is pre set at the factory and normally...

Page 7: ...de with rustproof sheet metal screws IMPORTANT NOTE Do not use sheet metal screws at the snap lock joints of Type B gas vents Do not weld or fasten the vent pipe to the boiler draft diverter The weigh...

Page 8: ...ate valves at the boiler inlet and outlet so it can be isolated for service Check local codes for specific plumbing requirements before beginning the installation An ASME pressure relief valve is supp...

Page 9: ...Water Inlet Air Cushion Type Expansion Tank Optional Feed Water Inlet Air Scoop JV Boiler Zone Pumps must be sized properly Flo Checks Flo Checks installed at proper places Bypass Valves Feed Water I...

Page 10: ...he cooling cycle 1K Electrical Wiring Follow these instructions to make the necessary initial electrical connections 1 Remove the two screws attaching the front cover of the control box 2 There are fo...

Page 11: ...al Code Part 1 in Canada Do not rely on the gas or water piping to ground the metal parts of the boiler Plastic pipe or dielectric unions may isolate the boiler electrically Service and maintenance pe...

Page 12: ...lified electrical technician make the necessary measurements to properly set the thermostats 1L Filling the System It is crucial to the efficient operation of the system that all air be removed from t...

Page 13: ...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 Wiring with Taco Zone Valv...

Page 14: ...m pressure with the boiler pressure gauge before beginning regular operation SECTION 2 Operation and Maintenance 2A 1 System Start Up WARNING Do not use this appliance if any part has been under water...

Page 15: ...n all the way and hold in Immediately light the pilot with a match using the match holder Continue to hold the control knob in for about one 1 minute after the pilot is lit Release knob and it will po...

Page 16: ...eratures are approximate 2C Maintenance 1 Lubricate the water circulating pump per the instructions on the pump 2 If a strainer is employed in a pressure reducing valve or the piping clean it every si...

Page 17: ...ge test the circuit between the red wire on the transformer and terminal 4 on the pump relay from terminal 6 on the pump relay and the A connection on the terminal board and from the purple wire termi...

Page 18: ...oiler of higher input 7 Pump noisy A Air in volute A Bleed air from volute Check pump alignment B Worn coupling or bearings B Replace worn parts 8 Boiler pounding A Too low water flow through boiler A...

Page 19: ...ble and ground wire Clean flame rod Check electrical connections between flame rod and module Check for cracked ceramic flame rod insulator Check that pilot flame covers flame rod and is steady and bl...

Page 20: ...or more interconnecting circulating loops each with its own pump Primary System Circuit Secondary Boiler Circuit Reverse return Piping Balanced equal flow first in last out piping Utilized with multip...

Page 21: ...6601 20036601 20036602 20036602 20036603 20036603 20036604 20036604 Temperature Pressure Gauge A0000100 A0000100 A0000100 A0000100 A0000100 A0000100 A0000100 A0000100 Pressure Relief Valve 30PSI A0069...

Page 22: ...036700 20036700 20036700 20036700 Terminal Strip E0098500 E0098500 E0098500 E0098500 Hi Tension Lead 10449515 10449516 Blocked Vent Switch E0121000 E0121000 E0121000 E0121000 Roll out Safety Switch E2...

Page 23: ...Mini Therm II Hydronic Boiler Page 23 Figure13 PartsIdentification Figure 13 Parts Identification...

Page 24: ...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 laar...

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