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Laars Mini-Therm JVH Installation and operation instructions manual

Manual is about: Residential Gas-Fired Hydronic Boilers

Summary of Mini-Therm JVH

  • Page 1

    Installation and operation instructions document 1254 installation and operation instructions for m ini -t herm residential gas-fired hydronic boilers models jvh, jvs these instructions are to be stored next to the boiler for reference purposes. For your safety: this product must be installed and se...

  • Page 2

    Laars heating systems page 2 table of contents section 1. General information 1a. Introduction ....................................................3 1b. Warranty ........................................................3 1c. Heater identification ....................................... 4 section 2. B...

  • Page 3

    Mini-therm jv page 3 section 1. General information 1a. Introduction this manual provides information necessary for the installation, operation, and maintenance of the laars model jv low pressure, copper tube hydronic boilers. These boilers are available in two configurations; the jvh has a hot surf...

  • Page 4

    Laars heating systems page 4 jvs 1 st and 2 nd c haracters (s eries n ame ) jv = m ini -t herm 3 rd c haracter (i gnition s ystem ) s = s park i gnition h = h ot s urface p ilot 4 th thru 6 th c haracters (s ize ) i nput mbtu / h 7 th c haracter ( fuel ) n = n atural g as p = p ropane g as 8 th c ha...

  • Page 5

    Mini-therm jv page 5 vent damper (jvs only): 1. Mini-therm jvs boilers have built-in draft diverter for natural draft operation. 2. Find the vent damper box which is located in the boiler package. 3. Install the vent damper directly to the top of the draft diverter outlet with the damper operator fa...

  • Page 6

    Laars heating systems page 6 inches mm dimensions in jvh 6 152 7 180 c b 25 635 2.4 61 24 610 7 180 9 -1/4 240 size a b c water connection gas connection in. Mm in. Mm in. Mm 50 75 100 125 160 225 13-3/8 13-3/8 16-7/8 16-7/8 20-3/8 25-5/8 340 340 429 429 518 651 3-1/8 2-1/4 5-3/4 5-1/2 7-1/4 10 79 5...

  • Page 7

    Mini-therm jv page 7 inches mm dimensions in jvs 6 152 7 180 c b 25 635 2.4 61 24 610 7 180 9 -1/4 240 water conn gas conn size a b c d e v in. Mm in. Mm in. Mm in. Mm in. Mm in. Mm 1-1/4 1/2 50 13-3/8 340 27-3/4 710 23-5/8 600 21-3/4 550 26-1/2 670 4 10 1-1/4 1/2 75 13-3/8 340 27-3/4 710 24-1/8 610...

  • Page 8

    Laars heating systems page 8 special attention should be paid to clearances between the front of the boiler and the closet door when it is closed. Consult the american national standard z21.13 for more information concerning closet installations. In canada, refer to the latest edition of csa-b149.1....

  • Page 9

    Mini-therm jv page 9 boiler size outside air area inside air area sq. In sq. Cm sq. In. Sq. Cm 50 15 97 100 645 75 20 129 100 645 100 25 161 100 645 125 32 206 125 807 160 40 258 160 1032 225 60 387 225 1452 *area indicated is for one of two openings: one at floor level and one at the ceiling, so th...

  • Page 10

    Laars heating systems page 10 be wired into the boiler control circuit to prevent the boiler from firing unless the blower is operating. The boiler must be completely isolated and protected from any source of corrosive chemical fumes such as those emitted by trichloroethylene, perchloroethylene, chl...

  • Page 11

    Mini-therm jv page 11 of the pipe, which may cause excessive cooling and condensation. 3c. Vertical venting - category i (jvs and jvh) all venting must comply with fuel gas code and be installed by a licensed professional. The mini-therm jvs or jvh series boiler can be vented into a masonry chimney,...

  • Page 12

    Laars heating systems page 12 vertical vents of the induced draft jvh boilers must be installed in accordance with the code requirement for category 1, fan assisted appliances. Follow the requirements as indicated in the latest edition of ansi z223.1/nfpa 54, sizing of category i venting system and ...

  • Page 13

    Mini-therm jv page 13 number d2004300 (4”) or d2000401 (6”), must be used when the boiler is vented through a side wall. It provides a means of installing vent pipe through the building wall, and must be located in accordance with ansi z223.1/nfpa 54, or in canada can/ cga-b149 and local applicable ...

  • Page 14

    Laars heating systems page 14 figure 8. Gas supply piping. Horizontal drop to boiler sediment trap or drip leg to boiler riser sediment trap or drip leg 3" (76mm) min. 3" (76mm) min. 1. Gas piping installation must be in accordance with the latest edition of ansi z223.1 and all local codes. In canad...

  • Page 15

    Mini-therm jv page 15 section 5. Water connections 5a. Water piping figure 9 shows ‘typical’ plumbing installations. Be sure to provide unions and isolation valves at the boiler inlet and outlet so it can be isolated for service. Check local codes for specific plumbing requirements before beginning ...

  • Page 16

    Laars heating systems page 16 multi-zone pump system primary secondary multi-zone pump system primary/secondary multi-zone valve system low temperature installation jv jv jv jv jv jv primary/secondary multi-zone valve system key: pump check valve valve zone valve union auto air bleeder figure 9. Typ...

  • Page 17

    Mini-therm jv page 17 5b by-pass piping the following information and suggestions are made on by-pass piping as it affects the temperature rise at the boiler. A boiler temperature rise must be taken on all jv boiler installations. If the temperature rise exceeds 30°f (17°c) at full rate, it is an in...

  • Page 18

    Laars heating systems page 18 figure 10. By-pass piping. Balancing valve or optional thermostat- ic union, laars p/n 2400-030. (primary/ secondary only) to system from system in (return) out (supply) drip leg left side view a full size by-pass must be installed. Balancing valve 5e flow requirements ...

  • Page 19

    Mini-therm jv page 19 figure 11. Typical plumbing diagrams. Jv from system to system non-low temperature systems (120°f+ return temps) simple primary/secondary piping - hydronic - not low temp note: all closed loop systems should include air elimination, expansion tank and feed water inlet. Place at...

  • Page 20

    Laars heating systems page 20 warning the boiler must be electrically grounded in accordance with the requirements of the authority having jurisdiction or, in the absence of such requirements, with the latest edition of the national electrical code, ansi/nfpa 70, in the u.S. And with the latest edit...

  • Page 21

    Mini-therm jv page 21 figure 10a. W iring diagram, jvh (220v opt) transformer 24v 115v r c urve wwsd dhw call heat call power 1 2 3 4 bo iler sen sor sys com out heat call com ca ll dhw call 120 vac l switched 120 vac to pump 0.4 2.0 3.6 o ff o n field wiring in ducer fa n bk bl box r r pilot hsi bo...

  • Page 22

    Laars heating systems page 22 figure 10b. W iring diagram, jvs r c urve wwsd dhw call heat call power 1 2 3 4 bo iler sen sor sys com out heat call com ca ll dhw call 120 vac l switched 120 vac to pump 0.4 2.0 3.6 1 2 3 4 o ff o n field wiring in ducer fa n bk bl h c mv pv 24v 115v transformer (220v...

  • Page 23

    Mini-therm jv page 23 y o br ignition control 2nd stage only gas valve mv mv/pv pv h bk temp control 3 5 pv c 6 mv blocked vent rollout sw bk bk bk power venter hi limit bl 1 damper r 2 4 gnd r r bk n jvs bk temp control pump 5a max transformer 110 vac fuse 2a p temp control temp control fan proving...

  • Page 24

    Laars heating systems page 24 com heat figure 11. Multiple zone wiring. Wiring with taco zone valves wiring with honeywell zone valves wiring with multiple zone pumps com heat com heat.

  • Page 25

    Mini-therm jv page 25 section 8. Operating procedures before placing the boiler in operation, check and reset the safety shutoff devices. Once the boiler is connected to the gas and water piping and after all the requirements in previous pages have been met, follow these procedures: 8a. System start...

  • Page 26: Mini-Therm Jvh

    Laars heating systems page 26 8c. Operating instructions mini-therm jvh.

  • Page 27: Mini-Therm Jvs

    Mini-therm jv page 27 8d. Operating instructions mini-therm jvs.

  • Page 28

    Laars heating systems page 28 8.E operating temperature control mini-therm jvi page 31 items14, 39 and insulation not shown control access panel note: the dip switch panel and led panel can be found under the control access panel after removing the bolts. When a call for heat and/or dhw is present t...

  • Page 29

    Mini-therm jv page 29 when the draft inducer starts (depending on the boiler size, swing may be as little as 30°). Remove any obstructions and clean around the pivot rod (handle) holes. 5. Inspect the venting system for obstruction, leakage or corrosion at least once a year. 6. Keep the boiler area ...

  • Page 30

    Laars heating systems page 30 exchanger can be inspected by using a flashlight and placing a mirror under the burners. An alternate method is to remove the venting and top panel to inspect the exchanger from above. The vent system should be inspected at the same time. If cleaning is required: a. Shu...

  • Page 31

    Mini-therm jv page 31 # symptom cause remedy 1 pump not operating no power . . . . . Pump defective . . . . . Incorrectly wired . . . . . Check circuit breakers and power source. Replace. Recheck wiring diagrams. 2 pilot outage inlet gas pressure too low . . . . . Consult gas utility company. Inlet ...

  • Page 32

    Laars heating systems page 32 turn gas on. Pilot burner lights? Main valve opens? System ok igniter warms up and glows red pilot valve opens start • turn gas supply off • set thermostat to call for heat sv9501/sv9601 is powered (24 vac nominal) yes check: • line voltage power • low voltage transform...

  • Page 33

    Mini-therm jv page 33 air vent a device used to purge air from the circuit. Should be located at the highest point in the circuit. Branch the section(s) of supply and return piping, including the heat distribution units connected directly to the trunk. Also referred to as a “zone”. By-pass a section...

  • Page 34

    Laars heating systems page 34 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 rw2001900 rw2001900 rw2001900 rw20...

  • Page 35

    Page 35 mini-therm jvi page 31 items14, 39 and insulation not shown (left side) (right side) figure 14a. Jvh parts identification. 25 26 22 25 16 15 27 35 33 38 32 32 17 14 19 20 34 3 28 1 2 6 5 9 23 24 37 36 29 10 31 18a 18b 4 11 7 30 12 21 13 8.

  • Page 36

    Laars heating systems page 36 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 w0039600 2 main gas valves gas ...

  • Page 37

    Page 37 mini-therm jvs (on left side) figure 14b. Jvs parts identification. 19 17 18 20 7 8 5 22 23 2 24 26 13a 13b 3 1 4 29 14 11 12 25 28 26 21 16 15 9 6 27.

  • Page 38

    Laars heating systems page 38 h2355800- 800.900.9276 • fax 800.559.1583 (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 ww...