Laars Mini-Combo II MCS Installation And Operation Instructions Manual

Manual is about: Residential Gas-Fired Space/Water Heater

Summary of Mini-Combo II MCS

  • Page 1

    Installation and operation instructions document 8001d h2077800d for your safety: this product must be installed and serviced by a professional service technician, qualified in hot water heater installation and maintenance. Improper installation and/or operation could create carbon monoxide gas in f...

  • Page 2

    Page 2 laars heating systems table of contents section 1. General information 1a. Introduction ................................................... 3 section 2. Installation 2a. Location ........................................................ 3 2b. Heater placement .....................................

  • Page 3

    Mini-combo ii page 3 section 1. General information warning this manual supplies information on the application, installation and operation of the indirect water heater unit. A complete instruction manual of the operation of the hydronic boiler (document 1025) is supplied along with this manual. Bot...

  • Page 4

    Page 4 laars heating systems b 54 1372 c vent damper* tank relief valve tank aquastat drain valve 24 610 a cl hot water tank outlet inlet 28 711 front view side view 24 1 / 2 622 (sizes 50 & 25) 25 635 (size 75 & 100) 7 178 mounted pump system check valve check valve mini-therm boiler (50-125) 24 61...

  • Page 5

    Mini-combo ii page 5 2c. Piping • to prevent damage to the unit, all soldering is to be done prior to assembling the cold and hot water, and any other connections to the tank. • use suitable pipe dope or tape. • before piping the boiler to the heating system, be sure to install the system check valv...

  • Page 6

    Page 6 laars heating systems h2001700h the boiler will not operate without the automatic vent damper. The vent damper wire harness must be inserted into the vent damper receptacle in canada: some units are supplied with vent damper jumper plug. Do not remove jumper unless vent damper is to be instal...

  • Page 7

    Mini-combo ii page 7 figure 6. Mct schematic. * *some canadian units are supplied with vent damper jumper plug. Do not remove jumper unless vent damper is to be installed..

  • Page 8

    Page 8 laars heating systems figure 7. Mcs schematic. * *some canadian units are supplied with vent damper jumper plug. Do not remove jumper unless vent damper is to be installed..

  • Page 9

    Mini-combo ii page 9 vent damper motor transformer figure 8. Sequence of operation. 115 volts supply tank stat (common) domestic demand (n.C.) heating demand (n.O.) tank pump (energized) high limit switch vent damper open power vent fan switch (optional) heating pump (energized) safety limit switche...

  • Page 10

    Page 10 laars heating systems figure 9. Parts identification..

  • Page 11

    Mini-combo ii page 11 # qty part # description 1 1 20085700 weldment, panel, base 2 1 20085600 weldment, panel, top 3 1 20086300 weldment, panel, door 4 1 20086400 panel, side, right 5 1 20127900 weldment, panel, side, left 6 1 20085900 panel, rear 7 1 20086500 panel, access 8 1 20084000 bracket, mo...

  • Page 12

    H2077800d waterpik technologies, inc. 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 ...