Internal reset control for gas boiler

Hi I am converting my oil burning boiler to gas and my contractor is suggesting a reset control system to regulate the water temperature based on the temperature of the returning water. Has anyone used one of these? Do they work? Are they worth $1.5K in terms of energy saving and comfort? Thanks in advance.

deanmansion

in Boiler Repair 11 years and 7 months ago

3

Please log in, in order to post replies!

3 replies

Newest Oldest

Master Plvmber | 11 years and 7 months ago

string(1) "1"
object(WP_User)#4935 (8) {
  ["data"]=>
  object(stdClass)#4908 (12) {
    ["ID"]=>
    string(4) "1447"
    ["user_login"]=>
    string(14) "Master Plvmber"
    ["user_pass"]=>
    string(34) "$P$BSHLZQSJWUzjnaSv9fyWJpNYjwcz.u."
    ["user_nicename"]=>
    string(14) "Master Plvmber"
    ["user_email"]=>
    string(24) "info@gatewayplumbing.com"
    ["user_url"]=>
    string(30) "http://www.GatewayPlumbing.com"
    ["user_registered"]=>
    string(19) "2007-08-10 20:40:53"
    ["user_activation_key"]=>
    string(0) ""
    ["user_status"]=>
    string(1) "0"
    ["display_name"]=>
    string(14) "Master Plvmber"
    ["spam"]=>
    string(1) "0"
    ["deleted"]=>
    string(1) "0"
  }
  ["ID"]=>
  int(1447)
  ["caps"]=>
  array(2) {
    ["subscriber"]=>
    bool(true)
    ["bbp_participant"]=>
    bool(true)
  }
  ["cap_key"]=>
  string(15) "wp_capabilities"
  ["roles"]=>
  array(2) {
    [0]=>
    string(10) "subscriber"
    [1]=>
    string(15) "bbp_participant"
  }
  ["allcaps"]=>
  array(4) {
    ["read"]=>
    bool(true)
    ["level_0"]=>
    bool(true)
    ["subscriber"]=>
    bool(true)
    ["bbp_participant"]=>
    bool(true)
  }
  ["filter"]=>
  NULL
  ["site_id":"WP_User":private]=>
  int(1)
}

Hi Gennady, Actually, the Code calls for “reset” and not necessarily “outdoor reset”. According to NYC DoB, a compliant reset device does allow for return-temp monitoring rather than using outdoor sensors. It’s a small concession to alleviate costs.

ellenlourie | 11 years and 7 months ago

string(1) "1"
object(WP_User)#4934 (8) {
  ["data"]=>
  object(stdClass)#4933 (12) {
    ["ID"]=>
    string(6) "209451"
    ["user_login"]=>
    string(11) "ellenlourie"
    ["user_pass"]=>
    string(34) "$P$BW7BCPC4MhhU4md6aHcLH/64c1GhM1/"
    ["user_nicename"]=>
    string(11) "ellenlourie"
    ["user_email"]=>
    string(22) "ellen.lourie@gmail.com"
    ["user_url"]=>
    string(0) ""
    ["user_registered"]=>
    string(19) "2024-06-29 12:47:36"
    ["user_activation_key"]=>
    string(0) ""
    ["user_status"]=>
    string(1) "0"
    ["display_name"]=>
    string(11) "ellenlourie"
    ["spam"]=>
    string(1) "0"
    ["deleted"]=>
    string(1) "0"
  }
  ["ID"]=>
  int(209451)
  ["caps"]=>
  array(1) {
    ["bbp_participant"]=>
    bool(true)
  }
  ["cap_key"]=>
  string(15) "wp_capabilities"
  ["roles"]=>
  array(1) {
    [0]=>
    string(15) "bbp_participant"
  }
  ["allcaps"]=>
  array(1) {
    ["bbp_participant"]=>
    bool(true)
  }
  ["filter"]=>
  NULL
  ["site_id":"WP_User":private]=>
  int(1)
}

All quality condensing boilers have internal outdoor reset, it just comes as a part of the boiler. If standard efficiency boiler is used, then, if outdoor reset is added, low temperature return water protection must be implemented, otherwise boiler will be destroyed in a few years. If you want zoning, then you need outdoor reset for each zone,not for the boiler, and setback is a big No No. In short, outdoor reset properly implemented requires different control strategy for heating system. Also. principle of outdoor reset is to re set water temperature going into heating system as a function of outdoor temperature, not a function of return temperature. the colder is outside, the hotter is the water in radiators and the warmer outside the cooler water in radiators. The curve describing this dependency is a outdoor reset curve and must be calculated during heat loss calculations and edr survey.

Master Plvmber | 11 years and 7 months ago

string(1) "1"
object(WP_User)#4930 (8) {
  ["data"]=>
  object(stdClass)#4936 (12) {
    ["ID"]=>
    string(4) "1447"
    ["user_login"]=>
    string(14) "Master Plvmber"
    ["user_pass"]=>
    string(34) "$P$BSHLZQSJWUzjnaSv9fyWJpNYjwcz.u."
    ["user_nicename"]=>
    string(14) "Master Plvmber"
    ["user_email"]=>
    string(24) "info@gatewayplumbing.com"
    ["user_url"]=>
    string(30) "http://www.GatewayPlumbing.com"
    ["user_registered"]=>
    string(19) "2007-08-10 20:40:53"
    ["user_activation_key"]=>
    string(0) ""
    ["user_status"]=>
    string(1) "0"
    ["display_name"]=>
    string(14) "Master Plvmber"
    ["spam"]=>
    string(1) "0"
    ["deleted"]=>
    string(1) "0"
  }
  ["ID"]=>
  int(1447)
  ["caps"]=>
  array(2) {
    ["subscriber"]=>
    bool(true)
    ["bbp_participant"]=>
    bool(true)
  }
  ["cap_key"]=>
  string(15) "wp_capabilities"
  ["roles"]=>
  array(2) {
    [0]=>
    string(10) "subscriber"
    [1]=>
    string(15) "bbp_participant"
  }
  ["allcaps"]=>
  array(4) {
    ["read"]=>
    bool(true)
    ["level_0"]=>
    bool(true)
    ["subscriber"]=>
    bool(true)
    ["bbp_participant"]=>
    bool(true)
  }
  ["filter"]=>
  NULL
  ["site_id":"WP_User":private]=>
  int(1)
}

You don’t really have a choice. A reset control is required by code now. Most boilers include a very basic device with few features, but there are any number of external, 3rd-party controls that take the whole concept to a higher level and allow for things like automatic boiler shutdown in warm weather, un/occupied temperature settings, early morning start-up for selected days of the week, scheduling, regulate boiler output based on system response, indoor/room temp feedback, 120v pump terminals, control water heating, etc. I suspect the unit you’re being offered for an additional $1.5K is one of the simpler 3rd-party units. None of them are a plug-n-play item. Reset works well when tuned and programmed right and that’s what determines your savings and payback time.