Weil-McLain PLUS LINE PLUS-E017-A/1206 - Manual (Page 24)

2 Part Number PLUS-E017-A/1206
PLUS LINE
Indirect-Fired Water Heaters – Series 3
B
Gas-fired boiler applications
Overview
Follow the guidelines in this section to install Gas-fired boilers with PLUS or
PLUS indirect water heaters. Install the domestic water piping and water heater following
the guidelines of Section A. See Sections C and D for other boiler applications.
B1. Install system water piping
System water piping methods ................................................................................... 25
Boiler circulator .......................................................................................................... 25
Sizing space heating system piping .......................................................................... 25
Zoning with zone valves............................................................................................. 26
Zoning with circulators ............................................................................................... 27
Combined space heating/water heating applications ............................................... 28
Dedicated water heating-only applications ............................................................... 28
B2. Install boiler-to-water heater piping
Combined space heating/water heating applications ............................................... 28
Dedicated water heating-only applications ............................................................... 28
B3. Field wiring — Gas-fired boilers only
Installation must comply with:................................................................................... 30
Line voltage connections ........................................................................................... 30
Wiring boiler circulator ............................................................................................... 30
Wiring PLUS circulator ............................................................................................... 30
Wiring a system circulator ......................................................................................... 31
Routing line voltage wiring ........................................................................................ 31
Low voltage connections ........................................................................................... 31
Room thermostat (space heating) ............................................................................. 31
Outdoor temperature sensor ..................................................................................... 31
PLUS water heater thermostat ................................................................................... 31
Additional limits .......................................................................................................... 31
B4. Start-up — Gas-fired boilers only
Follow boiler manual .................................................................................................. 33
Set space heating operation ...................................................................................... 33
Water heater operation .............................................................................................. 33
Water heater operation setup .................................................................................... 33
Verify space heating operation .................................................................................. 33
Verify water heater operation .................................................................................... 34
Operating information ................................................................................................ 34
Replace boiler jacket front door ................................................................................. 34
Gas