Honeywell H1008 manual

Honeywell H1008 Automatic Humidity Contr ol with HumidiCalc+  Softwar e Copyright © 1998 Honeywell Inc. • All Rights Reserved Rev 1.0 May 27, 1998[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 2 of 22  Automatic Humidity Control The Honey well H1008 Automatic Humidity Control with HumidiCalc+  Software is the world’s most advance d stand-alone humidity control. Simple to install, easy to troubleshoot, it is designed to save the installing contractor time, while maximizing benefits to th[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 3 of 22  Defining a Comfortable Humidity Level Much research has been conducted on what combination of temperature and humidity creates the most comfortable indoor environment. The 1997 ASHRAE Fundamentals Handbook 1 defines how comfort is perceived as a function of temperature and humidity . Figure 2 [...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 4 of 22 The messag e to take away from all this is: If you are in the business of trying to provide a comfortable indoor environment, controlling a humidifier by sensing re lative humidity may not result in optimum control. Especially poor performance may result when the temperature in the living space ex[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 5 of 22 Figure 3 illustrates why condensation occurs: Figure 3 – Tem p erature Profile of Double Pane Window Figure 3 shows the temperature profile through a ty pical double pane window. I f it is 70  F inside and 0  F outside, depending on the insulating value of the window, the temperature at th[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 6 of 22  Outdoor T emperature Compensating Hu midity Controls Honey well, with the Perfec t Climate Comfort Center  , was the first to introduce an electronic humidity control sy stem for the reside ntial market designe d to automatically adjust humidity levels based on outdoor temperature. This sys[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 7 of 22 The AutoTrac  control does not have the ability to provide true de wpoint control. This may result in overhumidification a t times when the temperature is g reater than norma l conditions and underhumidification if the temperature is less than normal conditions. For example, i f during night se[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 8 of 22  H1008 Automatic Hum idity Control w ith HumidiCalc+  - The T echnical Approach We found that there is more than a casual relationship between furnace run time and outdoor temperature. I n fact, in a single stage heating sy stem, in steady state, the percentag e of burner on-time (% on) is l[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 9 of 22 oversize). In this case the furnace will only be running 50% of the time at the ASHRAE design temperature of –16  F. Next, we looked at the insulation values of windows, and found that naturally, there is a relationship between the temperature of the inside surface of the window and the outdo[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 10 of 22 adjusting a single input value, we can achieve a control point that satisfied every one of the thousands of combinations of the variables. Voila  . By adjusting a single knob setting we can provide a solution for the entire range of five input variables. Figure 7 shows the operational characte[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 11 of 22 Nobody has more knowledge about heating loads than Honey well, the world leader in temperature control. More furnaces are controlled by Honey well thermostat s than any other, so nobody understands the science of temperature control better than we do. I n order for the prediction of outdoor tempe[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 12 of 22 -20 -10 0 10 20 30 40 50 60 70 80 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 0 5 10 15 20 25 30 35 40 Furnace Cy cles Humidifier C ycles Outdoor Temp. Dewpoint W indow Te m p. Temp. Setpoint Room Tem p. Time (hrs ) Tem p er atu r e ( o F) Dig itia l O u tp ut Figure 8 – Software Simulation o[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 13 of 22 -20 -10 0 10 20 30 40 50 60 70 80 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 0 5 10 15 20 25 30 35 40 Furna c e Cycles Humidifier C ycles Outdoor Tem p. Dewpoin t W indow Temp . Temp. Setpoint Indoor Tem p. Time (hrs ) Tem p er atu r e ( o F) Dig itia l O u tp ut Figure 9 – H1008 Autom atic [...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 14 of 22 -20 -10 0 10 20 30 40 50 60 70 80 00:0 0:00 01:0 0:00 02:0 0:00 03:0 0:00 04:0 0:00 05:0 0:00 06:0 0:00 07 :00:00.0 08:0 0:00 09:0 0:00 10:0 0:00 11:0 0:00 12:0 0:00 13:0 0:00 14 :00:00.0 15:0 0:00 16:0 0:00 17 :00:00.0 18:0 0:00 19:0 0:00 20:0 0:00 21:0 0:00 22:0 0:00 23:0 0:00 24:0 0:00 0 5 10 [...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 15 of 22  Making th e Best of a Duct Mou nted Hu midity Control One of the things we learned early on in this development was that a return air duct is not the best place to mount a humidistat that controls only by relative humidity . There are two major factors th at can dramaticall y affect t he accu[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 16 of 22 -20 -10 0 10 20 30 40 50 60 70 80 90 100 08: 00:00 08:30:00 .0 09: 00:00 09: 30:00 10: 00:00 10: 30:00 11: 00:00 11: 30:00 12: 00:00 12:30:00 .0 13: 00:00 13: 30:00 14:00:00 .0 0 5 10 15 20 25 30 35 40 Dewpoin t Fur nace Cycles (W ) Humidifie r Cycles Fan Cy cles (G) Duct RH Room Temp. Duct Temp.[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 17 of 22 2. Humidity Control Located Too Close to By pass Duct A second problem that can occur in many installations is a result of the humidity control being located too close to the by pass duct. We alway s recommend mounting the humidity control as far upstream from the by pass duct as possible (> 2[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 18 of 22 dewpoint increases slightly in response to the humidifier cy cles. During this period the relativ e humidity sensed in the duct is as low as 13 %. Because t he H1008 controls based on dewpoint, it is able to cy cle intermittently during the temperature re covery pe riod when the relative humidity[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 19 of 22 While the humidifier was on during the entire recovery period starting at 4:15 a.m., the sensed RH ranged from 20 to 30 %. The continuous operation of the humidifier caused the dewpoint in the house to exceed the window temperature for over two hours. Contrast this performance with the performanc[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 20 of 22 a ¾” diamete r hole to be cut in the duct. Drilling this hole with a uni-bit is a snap. Simply drill the hole, place the control on the duct, and secure it with self- tapping screws. Figure 14 – H1008 Sensors This method of mounting gr eatly improves the sealing of the return air duct. Build[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 21 of 22 Log ic to determine if the fan is running is determined from the equipment inputs so a current sensing relay is never required, providing additional savings to the contractor on jobs that would normally require one. 4. Automatic Configuration and Diagnostics Unlike AutoTrac  , the H1008 does n[...]

Rev 2. 0 63-7048 1998 Hone yw ell Inc. Page 22 of 22  Direct Comparison Chart – Honeywell H1008 Automatic Humidity Control w ith HumidiCalc+  Software vs. AutoTrac  Honeywell H1008 AutoTrac Installat ion Outdoor Sens or Not required for si ngle stage f urnaces. Recom mended f or heat pum ps and multi-stage f urnaces. Required for all ins[...]

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