System 3 Replace brass union and 2 nipples on the discharge line at the Taco valve (see pics) After 2 months since the May original diagnostics the insulation is completely saturated again but no higher than the 1" Brass union indicating that the Taco zone valve DOES NOT need replaced
2x Waterfurnace water\water geothermal pressurized closed loop systems confirmed running and holding stable pressure of 30 Psi after switching to cool mode and confirming 38° chiller tank temperature Test run all circulator pumps including both flow centers, 1 tank circulator pump, and four zones connected to 4 air handlers. Test run all zone valves excluding basement floor zones The two basement only hydronic floor heating zones were turned off for the summer Flush all drains and replace all air filters Test run all thermostats and equipment in cooling mode Final setting on all thermostats is 71 in cooling mode Heat can still be used but in emergency heat mode setting only, the chiller tanks will not produce heat until reset to heat mode in the fall Clean pre-filters and replace pleted filters on three basement dehumidifiers ***Zone 3 discharge line Taco valve union fitting has a micro pinhole/crack causing the saturated black insulation and rust stains on the white insulation
Replace air bleed valve and repressurize second floor hydronic coil zone 4 Noticed while on site today that zone 4 quarter turn shut off valve above the pump is frozen in place. The lower shut off valve is still functioning and todays service above was performed like normal
4 system Lennox high efficiency two stage variable speed gas furnace heating system tune up, maintenance, cleaning, safety inspection, run test. Install 4 replacement 20x25x2 pleated air filters Resurface flame sensors in the flush drains Shop vac equipment Inspect batteries and thermostat operation in all heating modes 4 system Waterfurnace hydronic heating coils heating run test Transfer hydrozone controls to heat and confirm geothermal heating operation and new tank temperature at 90°f for the winter season with 35 PSI glycol Filter and shop vac service on three whole house dehumidifiers ***System four on the second floor has a leaking air bleed valve that needs replaced ASAP. Glycol solution is leaking on the gas furnace and could potentially cause more damage at any time. (See attached pics) Estimate has been prepared and is ready to be sent for approval