Hello, this will be our first full winter in our (first) house. I replaced the 6” galvanized exhaust pipe from the boiler to the chimney (SS liner, brick chimney exits roof in middle of house/garage) last year as it was in very, very bad shape. I am aware that it hasn’t gotten very cold yet, but am concerned with the very short cycling of the boiler, remembering the rotted exhaust (condensation).
Viessmann Vitorond VR2-33 (2003) w/ Riello F5 and Vitotronic 100 KK5 controller 167*F high limit
Vitocell 100- 42gal indirect DHW HL-135*F diff-7*F
Taco 007 circulators
1250sqft ranch, built in 1993, I calculated heat loss approx 27K BTU/[email protected]
zone #1 Kitchen/Livingroom has 24’ of ¾”slantfin 15? - H/L for that area 14K (under radiated??)
zone #2 Bedrooms 37’ of ¾” slantfin 15? – H/L for that area is 13K
zone #3 ½ finished basement, heat is off down there until I can swap out ZURN potable PEX. (doh!)
zone #4 DHW 1” copper
Tstats zones 1&2: 68*F morning, 64*F during day, 70*F evening, 66*F night ; 2*F DIFF
Not being an expert on the subject Id say the boiler is oversized 300%?. I have been researching the Tekmar 260 as it seems to me when installed properly can extended periods of time between burn cycles/ increasing length of burn itself. Saving fuel is nice but my primary concern, after comfort, is equipment health and longevity. Since turning the heat on this season I am averaging 2min-on 10min-off cycles; that’s with zones 1&2 calling. Ive seen a couple 10min runs maybe when 1,2&4 call on cold start?
Boiler is wired cold start, I just connected the internal pump aquastat last night (wasn’t done previously) which now energizes the Zc terminal of the SR506 (allowing circulators to run) once boiler is heated to (90*F) desired temp.
Is it better to have the circulators come on for boiler cold start and heat the zones and boiler together or allow the boiler to get to a higher temp before turning the circulators on (thermal shock)?
Will the Tekmar 260 be effective at giving me longer, more effecient burn times.
Thanks in advance. –Sean.