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Taylor RGFG Installation Instructions Manual

Summary of RGFG

  • Page 1

    92-24161-104-03 supersedes 92-24161-104-02 installation instructions for rgfg upflow high efficiency modulating condensing gas furnaces if the information in these instructions is not followed exactly, a fire or explosion may result, causing property damage, personal injury or death. Recognize this ...

  • Page 2

    2 important: to insure proper installation and operation of this product, com- pletely read all instructions prior to attempting to assemble, install, operate, main- tain or repair this product. Upon unpacking of the furnace, inspect all parts for damage prior to installation and start-up. Table of ...

  • Page 3: Safety Information

    Combustion products must be discharged outdoors. Connect this furnace to an approved vent system only, as specified in vent pipe installation section of these instructions. Provide adequate combus- tion and ventilation air to the furnace space as speci- fied in the combustion and ventilation air sec...

  • Page 4

    4 duct leaks can create an unbalanced system and draw pollutants such as dirt, dust, fumes and odors into the home causing property dam- age. Fumes and odors from toxic, volatile or flammable chemicals, as well as automo- bile exhaust and carbon monoxide (co), can be drawn into the living space thro...

  • Page 5

    5 installation check list refer to installation instructions gas supply adequate pipe size correct supply pressure (during furnace operation) manifold pressure no gas leaks electrical 115 v.A.C. Supply (single circuit) polarity observed furnace properly grounded (earth ground) adequate wire size fur...

  • Page 6

    6 general information the rgfg series furnaces are design-certified by csa for use with natural and l.P. Gases as follows: • as direct vent, central forced air furnaces with all combustion air supplied directly to the furnace burners through a special air intake system outlined in these instruc- tio...

  • Page 7

    7 tions are available from: “national fire protection association, inc., batterymarch park, quincy, ma 02269.” these publications are: • ansi/nfpa no. 70-(latest edition) national electrical code. • nfpa90a installation of air conditioning and ventilating systems. • nfpa90b installation of warm air ...

  • Page 8

    8 5. Important: if installing in a utility room, be sure the door is wide enough to: a. Allow the largest part of the furnace to pass; or b. Allow any other appliance (such as a water heater) to pass. 6. Install the furnace level and plumb. If it is not level, conden- sate cannot drain properly, pos...

  • Page 9

    9 some models have a shipping bracket installed to pro- tect the blower assembly during shipping. Locate and remove the ship- ping bracket from the side of the blower housing before operating unit. See figure 3. The following models include the additional bracket (which must be removed) on the blowe...

  • Page 10

    Ao39201 figure 4 physical dimensions and clearance to combustibles, upflow models rgfg upflo w models no te: for 1800 or more cfm, both side returns must be used when not using a bottom return configuration. Airflow a039201 10

  • Page 11

    11 ducting proper airflow is required for the correct operation of this furnace. Too little airflow can cause erratic oper- ation and can damage the heat exchanger. The supply and return duct must carry the correct amount of air for heating and cooling if summer air con- ditioning is used. Size the ...

  • Page 12

    6. After it has been determined that each appliance that remains con- nected to the common venting system properly vents (when tested as outlined above), return doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliance to their previous conditions of use. 7. If improper ven...

  • Page 13: Elbows

    Table 1 there are several different types of elbows that can be used for con- structing a vent system. The draw- ings below show the dimensions of common 1/4 bend and 1/4 bend long sweep 90 degree elbows from astm 3311, standard specification for drain, waste and vent (dwv) plastic fittings patterns...

  • Page 14

    All furnace installations must comply with the national fuel gas code, can/csa b149.1 (canada) and local codes to provide ade- quate combustion and venti- lation air for the furnace. Failure to do so can result in explosion, fire, property damage, carbon monoxide poisoning, personal injury or death....

  • Page 15

    Furnace located in a confined space. A confined space (any space small- er than shown before as “uncon- fined”) must have openings into the space, which are located in accordance with the require- ments set forth in the following subsections a and b. The open- ings must be sized by how they connect ...

  • Page 16

    B. Where communicating with out- doors through horizontal ducts, each opening shall have a minimum free area of 1 square inch for each 2000 btuh of total input rating of all equipment in the enclosure. See table 5 and figure 8. Method 2 one permanent opening, located within 12 inches of the top of t...

  • Page 17

    Installation guidelines important: when installed as a non- direct furnace, only vertical terminations are allowed. Do not use horizontal termi- nations when the furnace is installed with a non-direct vent. All exhaust vent piping must be installed in compliance with part 7, venting of equipment, of...

  • Page 18

    Direct vent pipe installation read and follow all instructions in this sec- tion. Failure to properly vent this furnace can cause carbon monoxide poisoning or an explosion or fire, resulting in prop- erty damage, personal injury or death. Direct vent installations require a dedi- cated combustion ai...

  • Page 19

    Figure 9 standard vertical direct venting upflow model shown (typical for downflow/horizontal models) 10. No screens may be used to cover combustion air or exhaust. Vertical terminations standard vertical termina- tions (see figure 9) combustion air piping: use two medi- um-radius sweep elbows to ke...

  • Page 20

    Figure 10 concentric vent kit no. Rxgy-e03a (direct vent installations) h ho or riiz zo on nt ta al l iin ns st ta al ll la at tiio on n v ve er rt tiic ca al l iin ns st ta al ll la at tiio on n 1 1"" m ma ax xiim mu um m f fiie el ld d--s su up pp pl liie ed d s st tr ra ap p note: air intake not ...

  • Page 21: Ulc S636) Side Wall Vent

    Figure 11 vent kit installation options installation – rxgy-g02(u.S.) & rxgy-g02c (canada certified to ulc s636) side wall vent 21 st-a1075 figure 12 typical installation for all models installed with 3” pipe- reduce to a length between 12 inches and 30 inches of 2 inch pipe. Note: vent should protr...

  • Page 22

    Horizontal terminations all horizontal venting must be done with direct venting (2 pipe). Furnaces installed as non-direct vent must be terminated vertically. Standard horizontal termina- tions ((s se ee e f fiig gu ur re e 1 13 3)) note: all furnaces with horizontal air intakes (except those using ...

  • Page 23

    Figure 14 alternate horizontal direct vent termination see detail a pipe support strap 3" max. Note: 3-1/2" max. When d04 kit is used. Exhaust vent for models with input of 60,000 and 75,000 btu exhaust vent 2 1 1 / 2 " pvc for models with 120,000 btuh input (kit no. Rxgy-d04a) 2" pvc for models wit...

  • Page 24

    Location requirements horizontal direct vents the combustion products and moisture in the flue gases will condense as they leave the termination. The condensate can freeze on the exterior wall, under the eaves and on surrounding objects. Some discoloration to the exterior of the building is to be ex...

  • Page 25

    Figure 16 d diir re ec ct t v ve en nt t t te er rm miin na al l c cl le ea ar ra an nc ce es s natural gas and propane installation code national fuel gas code canadian installations us installations canadian installations us installations 1 ft. (30.5 cm) 4 ft. (1.22 m) 3 ft. (91 cm) 1 ft. (30.5 cm...

  • Page 26

    Figure 18 two furnace venting through wall figure 17 two furnace venting through roof more than two furnaces are to be vented, there must be at least 4 feet between the first two furnaces and the third, etc. Connecting to furnace important: clean and deburr all pipe cuts. The shavings must not be al...

  • Page 27

    Figure 19 upflow combustion air and vent pipe connection (gas valve may be different than shown) figure 20 upflow models -- combustion air fitting 27 st-a1157-01.

  • Page 28

    Condensate drain/optional neutralizer figure 21 upflow condensate drain (gas valve may be different than shown) general information do not run drain outdoors. Freezing of condensate can cause property damage. Important: do not connect into a com- mon drain line with an air conditioner evaporator coi...

  • Page 29

    Figure 22 upflow opposite side condensate trap connection (no kit required) important: there are two options when choosing a height for the con- densate riser: condensate overflow: with a 5 1 ⁄ 2 inch riser installed above the tee, a blocked drain will result in overflow from the riser. Furnace shut...

  • Page 30: Gas Supply And Piping

    30 gas supply and piping gas supply this furnace is equipped at the factory for use on natural gas only. Conver- sion to lp gas requires a special kit a av va aiil la ab bl le e f fr ro om m t th he e d diis st tr riib bu ut to or r. Failure to use the proper conver- sion kit can cause fire, carbon ...

  • Page 31

    31 gas pressure natural gas supply pressure should be 5" to 10.5" w.C. Lp gas supply pressure should be 11" to 13" w.C. This pressure must be maintained with all other gas-fired appliances in operation. Never purge a gas line into the combustion chamber. Never use matches, flame or any ignition sour...

  • Page 32

    32 table 9 natural gas pipe capacity table (cu. Ft./hr.) capacity of gas pipe of different diameters and lengths in cu. Ft. Per hr. With pressure drop of 0.3 in. And specific gravity of 0.60 (natural gas). Nominal length of pipe, feet iron pipe size, inches 10 20 30 40 50 60 70 80 1/2 132 92 73 63 5...

  • Page 33

    33 lp conversion important: lp gas from trucks used to transport liquid-based fertilizers can contain chemicals that will damage the furnace. Verify that your gas supplier does not use the same truck to trans- port materials other than lp. This furnace is shipped from the facto- ry for use on natura...

  • Page 34

    34 setting gas pressure a properly calibrated pressure gauge or u-tube manometer is required for accurate gas pressure measurements. Elevations above 2000 ft require that the furnace input rating be adjusted and that the size of the burner orifices be re-calculated based on elevation and gas heating...

  • Page 35: Electrical Wiring

    35 ate wiring diagram located on the inside cover of the furnace control box and in these instructions. Note: the electrical junction box may be moved to the right side if necessary. A knockout is provided. Seal the opposite hole with plug provided. L1 terminal and neutral termi- nal polarity must b...

  • Page 36

    Electrical checks line power check the furnace must have a nominal 115 volt power supply for proper operation. If there is not a consistent power sup- ply, contact a licensed electrician to correct the problem. 1. With the blower compartment door off, manually hold the push button door switch in. 2....

  • Page 37: Accessories

    The hum output is engaged roughly any time the heat speed blower is engaged and (1) 24vac is present on the thermostat terminal of the ifc labeled “hum stat” or (2) a communi- cating thermostat with humidification and dehumidification capability is installed with call for humidification pre- sent. A...

  • Page 38

    A. Humidification control only with no dehumidification (requires optional humidifi- er). A1. With communicating thermostat humidifier control is included with the (-)hc-tst412mdms (modulating, non-communicat- ing) and (-)hc-tst550cmms (full-color communicating) model thermostats. However, it is not...

  • Page 39

    External side filter rack: rxgf-ca these parts are available through prostock parts department. Alternate (left-side) drain kit (downflow models only): rxgy-h01 typical wiring accessories for communicating residential systems the rheem serial communicating (cc2) system allows accessories to be conne...

  • Page 40

    Typical wiring accessories for communicating residential systems the rheem serial communicating (cc2) system allows accessories to be connected to shut down the system in the event of a fault. Typical devices that can be connected are the drain overflow switch, smoke detector and freeze protection s...

  • Page 41

    41 table 11 natural gas orifice drill size (4% per 1000 ft. De-rate) important: for 90+ furnaces only. Do not use this chart for any 80+ furnace. Burner input (per burner) 15,000 btu @ sea level sea level 2000 to 3000 to 4000 to 5000 to 6000 to 7000 to 8000 to to 1999 ft 2999 ft 3999 ft 4999 ft 5999...

  • Page 42

    42 t able 12 supplement al orifice size char t 90 plus onl y models with 15,000 btu's per burner . Do no t use this char t for any 80 plus model. Na tural gas quick reference char t for orifice selection, a t 3.5" w .C. And approxima te final firing ra tes final firing rate per burner sea level orif...

  • Page 43

    43 lp gas at high altitude elevations in the u.S. Lp gas is a manufactured gas that has consistent heating value across most regions. The national fuel gas code (n.F.G.C.) guidelines are used with the following exception: the recommended lp gas high altitude orifice selections differ slightly in tha...

  • Page 44

    Table 16 airflow and condenser selection – premium (non-communicating) cooling systems (2 stage cool) (note: switch s5-2 of the ifc must be in the “off” position for optimum performance) 2 -gfg-06 & -07 17.5" 800 -arl/asl-24 off on 3 -gfg-06 & -07 17.5" 1200 -arl/asl-36 off off 3 -gfg-09 & -10 21" 1...

  • Page 45

    45 seven segment display: the furnace control displays status and diagnostic information at the seven segment display. When viewing the display the observer should be aware that the top of the digit is to the left and the bottom of the digit is to the right (upflow models). Figure 37 details proper ...

  • Page 46

    46 figure 37 when viewing the seven-segment display the bottom of the digits is on the right side of the control board, closer to the thermostat terminal block. Four (4) examples are shown. This example is 61 not 19 this example is h7 not l4 this example is 25 not 52 this example is 33 not ee figure...

  • Page 47

    47 continuous fan mode: “f” is displayed. This is then toggled with two numbers which indicate the cfm of the main circulating blower divided by 100. For example, if “18” is displayed, the furnace is attempting to deliver 1800 cfm of air. For example, if “f” is displayed followed by “12” (toggling),...

  • Page 48

    48 pin 2 to stepper modulating gas valve connector pin 2 (rx) pin 3 to stepper modulating gas valve connector pin 3 (tx) pin 4 to stepper modulating gas valve connector pin 4 (common) pin 5 to stepper modulating gas valve connector pin 5 (mvth) 15-pin mate-n-lok con- nector (e-18) (see fig 39) the 1...

  • Page 49

    49 operation of the furnace. Further, if no furnace shared data is present, the furnace will not operate in any mode and a fault will be displayed. Valid furnace shared data is defined as furnace shared data for the furnace series in question with the correct motor horsepower. However, it is impossi...

  • Page 50

    50 b. If valid furnace shared data is available from the network and no memory card is present, a “d4” (mem card invalid) fault is displayed at the com- municating thermostat active fault screen and at the furnace seven-segment displays when in standby mode only (see fault code priority list). The h...

  • Page 51

    51 er priority fault is not also present (in which case the higher priority fault is displayed) (see fault code priority list). C. If no furnace shared data is avail- able on either the memory card or the network, the fault code “d1” (no shared data) is displayed at the communicating thermostat acti...

  • Page 52

    52 be determined by the adjustments of s3-1 and s3-2. Furnaces with ½ hp motors will have a maximum target air- flow setting of 1200 cfm. Furnace with 1 hp motors will have a maximum tar- get airflow setting of 2000 cfm. The airflow achieved may be less than the target if the static pressure across ...

  • Page 53

    53 table 17 cooling airflow selections for non-communicating condensers “off” ½ hp motors = approx. 600 cfm 1 hp motors = approx. 1000 cfm “on” ½ hp motors = approx. 1200 cfm 1 hp motors = approx. 2000 cfm s4-2 and s4-3 - furnace test and operating modes furnace test switches the test switches will ...

  • Page 54

    54 b. The furnace has been in test mode continuously for sixty minutes, at which time the furnace control (ifc) will exit the test mode and proceed to normal heating operation as con- figured. Test mode can not be acti- vated again unless line voltage power to the furnace is cycled off and back on. ...

  • Page 55

    55 wire the thermostats for each of the configurations below. In non-communicating systems, the heating cycle is always initiated by a 24 volt signal on w1. When the controller senses 24 volts on w1, the following sequence occurs: modulating function: (modulating function with a non-com- municating ...

  • Page 56

    56 control two cooling stages (one com- pressor for first stage and two com- pressors for second stage). S1 (non-communicating systems only) dipswitch bank s1 is used to fine-tune the airflow in the heating mode. The switches of bank s1 can be set to adjust either the minimum heat rate air- flow or ...

  • Page 57

    57 clearing diagnostic fault codes from the buffer to clear the fault codes in the fault buffer, push and hold down the “fault recall” (sw-1) button for 3 seconds. When this is done, both seven-segment displays will ener- gize the middle horizontal segments for four seconds as confirmation that the ...

  • Page 58

    58 communicating sys- tems the modulating furnace is capable of communicating with a thermostat and condenser to improve cooling and heat-pump airflow, displaying active faults and active furnace information at the thermostat and improved diagnostics and trou- bleshooting. Wiring a furnace for com- ...

  • Page 59

    59 startup for systems con- figured with communica- tions installation of line voltage and gas must be performed according to instructions written in this manual. Fail- ure to do so could result in injury or death. When the furnace is configured for communications, the components on the network (i.E...

  • Page 60

    60 this will continue until the high cooling call information is provided from the condenser. Once the max cooling cfm value has been transmitted by the con- denser (condenser must reach high stage – in heat pump or cooling), the continuous fan will then have a maxi- mum cfm value equal to the max c...

  • Page 61

    61 the normal state is closed. These switches are sometimes referred to as “roll-out” controls or limits. When one or more of these limits has opened, a flame has rolled into the vestibule. This event should rarely (if ever) happen but can be an indicator that the exhaust flue is blocked. The mrlc c...

  • Page 62

    62 figure 46b menu tree – – continued 7. G ga as s v vl lv v p pr rc cn nt t – indicates the firing rate of the modulating gas valve. This value can be any num- ber between 40% and 100% depending on the thermostat demand. 8. G ga as s v vl lv v r re el la ay y – indicates the state of the gas valve ...

  • Page 63

    63 the final item in this menu is “clear faults”. The options are “yes” and “no”. This item permits the faults to be cleared so all six positions will display “no fault” and “days 0”. When faults are cleared, the center segment on both seven segment displays on the furnace control will flash. Note t...

  • Page 64

    64 5. R re es se et t a al ll l d df fl lt ts s – this selec- tion restores all items in the “setup” menu to the factory default selections. If “yes” is selected, all settings in this menu will be lost. Note: when faults are cleared in the furnace “setup” user menu, the continuous fan cfm will also ...

  • Page 65

    65 dual-fuel operation in commu- nicating mode systems configured for dual-fuel opera- tion will include a communicating con- denser with a reversing valve. Dual- fuel systems will display “hp” for heat- pump heat operation at the furnace control’s (i.F.C.) dual seven-segment displays. During defros...

  • Page 66: Start-Up Procedures

    66 failure to replace the burner door can cause products of combustion to be released into the condi- tioned area resulting in personal injury or death. 6. Turn on the manual gas stop. 7. Turn on the furnace electrical power. 8. Turn thermostat to “heat” mode and set the room thermostat at least 10°...

  • Page 67

    67 t ta ab bl le e 2 20 0 n no or rm ma al l o op pe er ra at tiio on n c co od de es s low cooling mode code at dual 7-segment display of ifc: c description: indicates low cooling for legacy systems only. This code is not used in communicating systems. C description: this code indicates the furnace...

  • Page 68

    68 sequence of operation heating cycle initiation the heating cycle is always initiated by a 24 volt signal on w of the thermostat or, for communicating systems, a message is transmitted from the thermostat to the ifc. When the controller senses 24 volts on w or the communicated message for heat cal...

  • Page 69: Maintenance

    69 disconnect main electrical power to the unit before attempting any mainte- nance. Failure to do so can cause electrical shock resulting in personal injury or death. Filters keep the filters clean at all times. Remove the filter. Vacuum dirt from filter, wash with detergent and water, air dry thor...

  • Page 70

    70 figure 49 upflow -- side filter locations cut-out and drill detail rod & filter support angle assembly i 332.

  • Page 71

    71 important: it is recommended that at the beginning of the heating sea- son, the flame sensor be cleaned with steel wool by a qualified installer, ser- vice agency or the gas supplier. Important: it is recommended that at the beginning of the heating sea- son, the condensate trap be inspect- ed fo...

  • Page 72

    72 figure 50 troubleshooting chart modulating integrated furnace control (ifc) troubleshooting guide.

  • Page 73

    73 figure 50 (continued) troubleshooting chart – – continued modulating integrated furnace control (ifc) troubleshooting guide.

  • Page 74

    74 table 23 normal operation codes low cooling mode code at dual 7-segment display of ifc: c description: indicates low cooling for legacy systems only. This code is not used in communicating systems. C description: this code indicates the furnace is in cooling mode (any stage) for communicating sys...

  • Page 75

    75 table 24 furnace fault codes expanded w/descriptions and solutions e-117 fault codes note: the text in the “displayed text” box shows combinations of upper-case and lower-case letters. Upper-case letters are used in the message displayed at the thermostat active fault screen. For example, the tex...

  • Page 76

    76 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued e-117 (table continues on following pages).

  • Page 77

    77 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued (table continues on following pages).

  • Page 78

    78 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued (table continues on following pages).

  • Page 79

    79 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued 10 cause: there can be several causes for multiple failed ignition attempts. The most common are: (1) the flame sense rod is unable to sense flame. It may need cleaning or may not be properly connected. (...

  • Page 80

    80 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued note: after 3rd failure while going through 4th ignition attempt, homeowner is notified at the communicating thermostat. (table continues on following pages).

  • Page 81

    81 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued (table continues on following pages).

  • Page 82

    82 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued (pins 10 & 15 of connector e-18) pins 10 & 15 e-18 (table continues on following pages) description: this code is displayed anytime there is an igniter failure. It may also be displayed if the furnace con...

  • Page 83

    83 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued (pins 10 & 15 of connector e-18) pins 10 & 15 e-18 (table continues on following pages).

  • Page 84

    84 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued (table continues on following pages).

  • Page 85

    85 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued when the inducer is energized at high speed. 60%. The switch is (table continues on following pages).

  • Page 86

    86 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued when the inducer is energized at low (table continues on following pages).

  • Page 87

    87 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued (table continues on following pages).

  • Page 88

    88 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued (table continues on following pages).

  • Page 89

    89 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued indoor blower motor (i.B.M.) will complete the 90 second blower off delay. Further heating operation.

  • Page 90

    90 table 24 (continued) furnace fault codes expanded w/descriptions and solutions – – continued.

  • Page 91

    91 figure 51 wiring diagram – – stepper modulating gas valve (fuel code hu) (furnace model is rgfg).

  • Page 92: Thermostats

    92 figure 52 24-volt terminals non-communicating thermostats thermostat wiring note: for fully modulating function with a non-communicating thermostat, the furnace must be installed with the (-)hc-tst412mdms modulating touch-screen thermostat. Note: do not use 24 volt control wire smaller than no. 1...

  • Page 93

    93 figure 54 fully modulating – typical dual fuel application – single stage heat pump (non-communicating) thermostat model: (-)hc-tst412mdms remote sensor: f1451378 plenum sensor: 47-21711-20 ➤ figure 53 wiring diagram for modulating heat (no dual fuel) (non-communicating) v / w2 y h (y 2 ) y (y 2 ...

  • Page 94

    94 **warning: do not apply 24vac to the v/w2 terminal on the ifc (this is often done during setup, troubleshooting and/or diagnosing problems). Doing so will damage the thermostat. ➤ figure 56 wiring diagram for single-stage heat (non-communicating) * no mechanical thermostats. ** 40%, 65%, and 100%...

  • Page 95

    95 figure 57 wiring diagram from two-stage heat (non-communicating) figure 58 wiring diagram – – special configuration: communicating thermostat and furnace with non-communicating condenser st-a1173-01 note: dehumidification function from a communicat- ing thermostat will not be possible with this c...

  • Page 96: Applications

    96 figure 56 (-)hc-tst412mdms modulating touchscreen thermostat furnace operation with a two- stage thermostat to set the furnace for operation with two-stage non-communicating ther- mostats, set switches 2 & 3 of s4 to the “on” position (see figure 41). Note that these switches should be in the “of...

  • Page 97

    97 3 time of day day of week room temperature system switch fan switch indicates when thermostat is calling for heat or cool battery level indicator indicating the current power level full power remaining. Half power remaining. Change the batteries should be replaced at this time. Menu key for enter...

  • Page 98

    98 table 25: configuration menu non- displayed press or program- program- press (factory to select from mable mable button default) listed options comments 1 1 ms 2 hp 1, hp 2, ss 1 selects multi-stage (ms 2, no heat pump), heat pump 1 (hp 1, 1 compressor), heat pump 2 (hp 2, 2 compressor or 2 speed...

  • Page 99

    99 52 installer/configuration menu 11) select continuous backlight in low lighting condi- tions, display backlight improves the display contrast. When c terminal is connected, selecting dl on will turn the backlight on continuously. Selecting dl off will turn the backlight on momentarily after any k...

  • Page 100

    100 53 20) heat temperature limit range this f eature adjusts the highest setpoint temperature for heat. The default setting is 99 f. It can be changed between 62 f and 98 f b y pressing the or key. The "temperature limit" icon will be displayed to the left of your setpoint temperature when using th...

  • Page 101

    101 54 operating your thermostat choose the fan setting (auto or on or prog) fan auto is the most commonly selected setting and runs the fan only when the heating or cooling system is on. Fan on selection runs the fan continuously for increased air circulation or to allow additional air cleaning. Fa...

  • Page 102

    102 55 enter the heating program 1) press the menu button and then press set schedule. Press system button to select either "heat" or "cool" in the system switch area indicating the active mode being programmed. You can switch to the other mode by pressing the system switch at any time. 2) the top o...

  • Page 103

    103 programming energy saving factory pre-program the (-)hc-tst401mdms thermostats are programmed with the energy saving settings shown in table 26 below for all days of the week. If this program suits your needs, simply set the thermostat clock and press the run button. Table 26 below shows the fac...

  • Page 104

    104 57 programming wired remote temperature sensing one remote temperature sensor can be installed indoor or outdoor and connected to the thermostat by a maximum cable length of 100 meters (300 ft). Three terminals, +, s & - are provided on the terminal block to connect to the white- rodgers standar...

  • Page 105

    105 58 troubleshooting reset operation note: when thermostat is reset, installer configuration menu settings and programming will reset to factory settings. If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermostat by removing ...

  • Page 106: Communicating Thermostats

    106 however, after a two-hour period, this will change and the thermostat will take as long as five minutes for every degree f to change the dis- play. Therefore, for example a rapid change of five degrees in room tem- perature will not be correctly indicat- ed at the thermostat for (up to) 25 minut...

  • Page 107

    107 condenser when a cooling call has been sent from the communicating thermostat. When this configuration is desired, use the wiring diagram in figure 64 to con- nect the thermostat and condenser to the furnace control. Note: a heat pump condenser cannot be installed with this configuration. There ...

  • Page 108: On The (-)Hc-Tst501Cmms

    108 the order in which these messages will be displayed will depend on which com- ponents are energized first. The order listed here assumes that the furnace and condenser are energized at the same time. If not, the order of display will be in the order that the components are turned on. When the sy...

  • Page 109

    109 entering and viewing the furnace main menu and sub menus: figure 66 demonstrates how to view and enter the furnace user menu and subsequent sub-menus with the (-)hc- tst501cmms communicating thermo- stat. To get into the submenus, use the up and down arrow keys of the thermo- stat to display the...

  • Page 110

    110 making setup changes: figure 67 demonstrates how to make changes to the setup sub-menu with the (-)hc- tst501cmms communicating thermo- stat. Figure 67 wiring diagram – – communicating configuration st-a1118-01-2 in this example, we want to change the “max heat adjust” to –15%. First, enter the ...

  • Page 111

    111 escaping or returning from menus: figure 68 demonstrates how to escape from a menu back to the main screen or how to return to a previous menu level using the (-)hc-tst501cmms communicating thermostat. Figure 68 wiring diagram – – communicating configuration st-a1118-01-1.

  • Page 112

    112 figure 71 fault message (if any) (main limit open) displayed. 3. The f fa au ulltt s stta attu us s screen will appear with a description of the current fault (if any). Use the section of this manual titled f fu ur rn na ac ce e f fa au ul lt t c co od de es s e ex xp pa an nd de ed d w wiit th ...

  • Page 113

    113 figure 75 navigate to desired user menu and select. Figure 74 navigate to furnace and select. Viewing furnace user menus with the (-)hc-tst550cmms thermostat to enter a particular user menu on the (-)hc-tst550cmms, full color communicating thermostat follow the directions below. Use the section ...

  • Page 114

    114 figure 78 in the advanced installer menu select communicating devices. Figure 79 select furnace from the list of communicating devices. Figure 80 select setup from the list of furnace menus. Changing furnace setup items on the (-)hc-tst550cmms thermostat to change a particular furnace user setup...

  • Page 115

    115 figure 81 select the setup item to be adjusted (max heat adj%) 5. Use the up and down arrow keys to view and navigate to the desired setup menu item. Once the desired menu item is highlighted, press the “m” key to enter the sub menu. In this example, we will change the max heat adj% (cur- rently...

  • Page 116

    116 figure 84 update successful 8. This screen; update successful will be displayed briefly upon successfully changing the setting. 9. To escape from this menu, press the enter (to return to the furnace user menus) or home button or just wait a few minutes and the main screen will appear again. Cm 0...