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| = now located at e://onedrive/jupyter/energy =
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| ===maintenance/repair===
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| ====11/5/21====
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| problem: tstat lights were on but zone valve lights were off. End switch was not being activated for LR and TV (intermittent)
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| *replaced LR zone valve with new, voltage between terminal 1 and 3 was low
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| *replaced TV zone valve with clip salvage, voltage between terminal 1 and 3 was low
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| *ordered spare from ebay. Still have one clip salvage 2nd shelf near boiler. Replaced valves are on top shelf, have tape folded back to indicate they were replaced.
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| https://mckwiki.parleyvale.com/images/f/f6/SelectingCirculators.pdf
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| ===heat pump===
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| https://www.pmengineer.com/articles/92614-cold-climate-air-to-water-heat-pumpspart-2
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| https://www.pmengineer.com/ext/resources/PME/2016/July/pme0716Siggy_Figure4.png
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| email to Artic on air source hydronic
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| I am interested in Arctic Heat Pump 035ZA/BE – 29,000 BTU for use in a domestic HW + radiant application. Could you send me submittal sheets and any other details on
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| [https://1drv.ms/b/s!Apj4JFLjNWyohbVblBSgPTh_KsYWgA?e=H0SkNv Arctic Air to Water Heat Pumps]
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| Domestic Hot Water
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| The AltSource tank is equipped with an optional internal Heat Exchanger (HX) for domestic hot water
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| production. This consists of 200 feet of 1/2” copper piping. Based on 120°F water tank temperatures this 200 ft of ½” OD cooper pipe, 26.2 sq/ft surface area and has a volume of 1.5 total gallons.
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| Because the efficiency of the heat pump is better at lower water temperatures, we recommend using the internal domestic hot water coil in a pre-heat arrangement. In this diagram the cold water enters the coil from the bottom and exists at about 95% of the tank setting temperature. Following this the warm water then goes to the primary tank or an on-demand water tank where it is topped up a few degrees to reach 120°F or more depending on the application. When sizing a heat pump with domestic hot water load please add about 10,000 BTU per person to the daily load. So, a house with 4 persons would need an extra 40,000 BTU per day. On an hourly bases this would be 1,667 BTU/hour over 24 hours.
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| What is a flow rate and what should I ask for? Consider how many of these needs you may have simultaneously to determine the maximum flow rate you require. For a home with 1 bathroom, we recommend 6-7 GPM; 2 bathrooms, 8 – 9 GPM; and 3+ bathrooms, 9-11 GPM.
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| What is a flow rate and what should I ask for? Consider how many of these needs you may have simultaneously to determine the maximum flow rate you require. For a home with 1 bathroom, we recommend 6-7 GPM; 2 bathrooms, 8 – 9 GPM; and 3+ bathrooms, 9-11 GPM.
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| https://plumbestore.com/products/eco-king-52-stainless-steel-coil-tank?variant=40820050100277¤cy=USD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&srsltid=Ad5pg_GvtvxwqGw-r-NdmLPi-dtNOxGVEkE9--PY0lQMW7D3lHV6h7GzU2s
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| ==== heat pump water heater for HW and radiant ====
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| http://www.civil.uwaterloo.ca/beg/archtech/hot_water_heater_furnace.pdf
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| like this but with heat pump water heater instead
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| [[File:Heat pump for DHW+radiant.png]]
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| ===== hybrid heat pump algorithms for resis. =====
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| https://www.greenbuildingadvisor.com/question/rheem-hybrid-pre-warm-mode-while-in-heat-pump-mode
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| https://www.nrel.gov/docs/fy14osti/52635.pdf
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| ===boiler===
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| Lochinvar 120000 BTU
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| ==== service 9/12/2019 ====
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| Suburban Service Westwood 781-769-6694 2hrs $338 $169/hr
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| ===esp8266 hvac controller===
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| ====3/8/====
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| Soldered DHT11 onto an esp8266 to monitor attic humidity.
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| For the firmware in fs/www/iot/pio/pio-ardui/espboth/secstidif created config and saved as CONFIG_CYURD117attic_hum.cpp/h. Tricky bit was
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| ====3/7/22====
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| replaced 700ma power supply with 2A (10W)
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| ====2/24/22====
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| '''TODO''' problem with 74(mb) and 75(peri), furthest away devices. Constant wrong low readings followed by correct readings try new power supply first
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| Supply for the six 8266's and 7 relays blew today, flashing on and off. Replaced with same kind. It lasted since 11/19, 2 1/2 years, when that disastrous upgrade happened while I was sick from derm drug.
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| max power esp8266 170ma * 7 = 1672ma
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| power for 8 relays
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| The "L" in SRC-05-SL-C means 0.36 Watts. Since Watts is Volts times Amps we can divide by Volts to get Amps:
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| 0.36 / 5 = 0.072 = 72 mA per coil. * 8 = 575 mA
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| total power needed: 1672ma + 575ma =2247ma NOT 700ma
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| ==== 1/24/22====
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| The design embedded in the wooden plates for all but the living room uses a tiny pcb soldered right to the esp8266 with the sensor haging out so as not to be overheated by the chip. This KICAD esp82single design can use espboth/secstidif with a CONF_CYURD074hvacMB.cpp like configuration. All other fixes should use this version. Flaky devices are the master bedroom and peri's study. For the master bedroom, re'flashing brought it back to life. Had trouble flashing. Turns out I tried 3 bad usb cables in a row so I thought it was windows 11. You can check for a working connection in DeviceManager. view/show_hidden_devices. CH340 is the driver for esp and I plugged it into CYURD001 and its listing under PORTS changed from greyed out to dark when a good cable/connection was in play.
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| ====current design====
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| [https://wiki2.sitebuilt.net/images/a/a9/Heat_12ParleyVale.json code and spec file in d://fs/www/iot/pio/pio-ardui/espBoth/secstdif ]
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