T Therm Geo TST-*** Installation & Operating Instructions Manual

Manual is about: Two-Stage Split Geothermal Heat Pump

Summary of TST-***

  • Page 1

    12/03/2012 gi301 two-stage split geothermal heat pump installation & operating instructions model: (tst-***) application retrofit existing forced air installations dual heat – combine this geothermal unit and a-coil with standby gas or oil furnace lmc (load management control), lmc/int ready tested ...

  • Page 2: Table of Contents

    12/03/2012 gi301 table of contents introduction 1 product configurator (gc002) 3 mechanical specifications 4 electrical data 5 product dimensions 6 installation requirements 7 mechanical installation overview 8 mechanical installation source water 11 desuperheater, domestic hot water 16 duct system/...

  • Page 3

    12/03/2012 1 gi301 introduction geothermal heat pumps are able to heat and cool spaces with efficiencies exceeding 350% by taking advantage of solar heat stored in the earth’s crust and the earth’s relatively stable temperatures. In the winter time, heat is moved from the earth into the home and con...

  • Page 4

    12/03/2012 2 gi301 safety considerations warning before performing service or maintenance operations on a system, turn off main power switches to the indoor unit. If applicable, turn off the accessory heater power switch. Electrical shock could cause personal injury. Installing and servicing heating...

  • Page 5: Tvt-048-1Cldx1-Xx

    10/12/2012 gc002 ttherm geo heat pump configurator tvt-048-1cldx1-xx ttherm geo (1) unit style (2) c = combo h = hydronic s = split v = vertical unit type (3) a = single stage t = two stage nominal tonnage (4, 5, 6) 024 = 2-ton 036 = 3-ton 042 = 3.5-ton 048 = 4-ton 060 = 5-ton 072 = 6-ton 096 = 8-to...

  • Page 6

    12/03/2012 4 gi301 mechanical specifications – r410a two-stage compressor model tst-024 (2 ton) tst-036 (3 ton) tst-048 (4 ton) tst-060 (5 ton) coax & piping water volume – gal .43 .65 1.1 1.1 source temperature °f (min/max) 20°/120° 20°/120° 20°/120° 20°/120° nominal source differential* ° f (h/c) ...

  • Page 7

    12/03/2012 5 gi301 electrical data – single phase voltage compressor desup. Pump loop pump (ext) total min. Model (60 hz) rla lra fla fla fla ampac. Max. Fuse/ hacr tst-024 208/230-1 13.1 73.0 .15 4.4 17.7 20.9 40 tst-036 208/230-1 17.9 96 .15 4.4 22.5 26.9 50 tst-048 208/230-1 27.1 152.9 .15 4.4 31...

  • Page 8

    12/03/2012 6 gi301 product dimensions forced air coil – reference information.

  • Page 9

    12/03/2012 7 gi301 installation requirements 1. All installation work must be performed by trained, qualified contractors or technicians. Ttherm geo heat pump, sponsors installation and service schools to assist the installer. Contact ttherm geo at sales@tthermgeo.Com for upcoming dealer training ev...

  • Page 10

    12/03/2012 8 gi301 mechanical installation overview this ttherm geo series unit cannot correct airflow problems inherent within the duct work system. The following items should be carefully considered and properly followed for all installations: examination of the existing forced air furnace – prior...

  • Page 11

    12/03/2012 9 gi301 equivalent duct capacity airflow charts and determine if the system is capable of delivering the cfm required on the nameplate. Especially check the number of registers and the number of “6 inch rounds”. The same would apply to cold air return duct capacity. D. Calculated cfm - by...

  • Page 12

    12/03/2012 10 gi301 figure 1 – horizontal closed loop closed loop applications – closed loop system re-circulates the same water/antifreeze solution through a closed system of underground high-density polyethylene pipe. As the solution passes through the pipe it collects heat (in the heating mode) t...

  • Page 13

    12/03/2012 11 gi301 figure 3 p/t adapter mechanical installation source water warning loop design is extremely important for proper heat pump operation. Incorrect loop design will reduce heat pump efficiency, cause poor performance or may render the system unusable. If you lack experience designing ...

  • Page 14

    12/03/2012 12 gi301 figure 4 – non-pressurized closed loop with flow center – typical piping arrangement. Figure 5 – pressurized closed loop with flow center – typical piping diagram..

  • Page 15

    12/03/2012 13 gi301 antifreeze when considering the earth loop solution, water quality is very important. Ttherm geo recommends a minimum of soft water (not well water) treated with 2 oz. Of household chlorine bleach for each 10 gallons of total volume. Ttherm geo’s recommended antifreeze concentrat...

  • Page 16

    12/03/2012 14 gi301 heat pump a flow meter is installed to provide a visual indicator of open loop flow in gpm. The water solenoid valve must be installed to control water flow through the unit. After the water solenoid a flow control valve is installed to limit maximum flow through the heat pump. T...

  • Page 17

    12/03/2012 15 gi301 figure 6: open loop – typical piping diagram. Note ttherm geo heat pumps are factory set for open loop operation. Open loop operation – ttherm geo heat pumps are factory set for open loop operation. Open or closed loop operation is set with jumper j11 on the left side of the geo ...

  • Page 18

    12/03/2012 16 gi301 desuperheater, domestic hot water general ttherm geo series units may be equipped with a double wall desuperheater and an integrated circulating pump that can provide supplemental domestic hot water (sdw). This is done by stripping heat from the superheated gas leaving the compre...

  • Page 19

    12/03/2012 17 gi301 figure 7 – desuperheater piping, preheat tank this is the most effective and efficient arrangement for high hot water needs. This is also the recommended method when using a gas water heater with a desuperheater. The preheat tank need not be as big as the standard water heater; 4...

  • Page 20

    12/03/2012 18 gi301 duct system an air filter must always be installed upstream of the air coil on the return air side of the air handler or furnace. If there is limited access to the filter rack for normal maintenance, it is suggested that a return air filter grill be installed. Be sure that the re...

  • Page 21

    12/03/2012 19 gi301 coil in supply plenum method coil in return ductwork method installing the txv on ttherm geo tst units 1. Be familiar with the following sections in the installation & operating instructions manual:  mechanical installation refrigeration (line set size and length)  charging pro...

  • Page 22

    12/03/2012 20 gi301.

  • Page 23

    12/03/2012 21 gi301 4. Determine the location of the txv bulb on the suction line of the a-coil or the line set. Locate a point on top 2-4” from the bulb and towards the compressor. Drill a ¼” hole to accept the equalizer line from the txv. Deburr the hole and clear the pipe of all shavings and debr...

  • Page 24

    12/03/2012 22 gi301 mechanical installation refrigeration overview the ttherm geo series split unit includes pre-charged r-410a, with the filter drier factory installed in the unit. The charge may need to be fine tuned based upon line set length and system performance. Line set lengths of over 25ft ...

  • Page 25

    12/03/2012 23 gi301 line set size information 10 feet 20 feet 30 feet model suction liquid suction liquid suction liquid tst-024 ¾” ⅜” ¾” ⅜” ¾” ⅜” tst-036 ⅞” ⅜” ⅞” ⅜” ⅞” ⅜” tst-048 ⅞” ⅜” ⅞” ⅜” ⅞” ⅜” tst-060 ⅞” ⅜” ⅞” ½” ⅞” ½” see specification chart, page 4, or unit nameplate for factory charge. As s...

  • Page 26

    12/03/2012 24 gi301 superheat and sub-cooling comments 1. This is a two txv system – the heating txv is internal to the main cabinet at the water coil refrigerant entrance and the cooling txv is located on the plenum air coil at the air coil liquid entrance. 2. Begin in heating and check superheat a...

  • Page 27

    12/03/2012 25 gi301 unit operating conditions – heat model stage source temp source temp Δ gpm air temp Δ amps 240 blower amps cfm discharge pressure at 68 deg a-rt discharge temp sub cool at txv suction pressure at bulb suction temp at bulb super- heat at bulb 2 32 3.3-5.3 6 26-32 8.6-9.6 1.5 840-8...

  • Page 28

    12/03/2012 26 gi301 unit operating conditions – cool model stage source temp source temp ∆ gpm air temp Δ dry bulb amps 240 blower amps cfm discharge pressure at 80 deg a-rt discharge temp sub-cool at txv suction pressure at bulb suction temp at bulb super-heat at bulb 2 59 9.4-11.4 6 20.5-25.5 6.4-...

  • Page 29

    12/03/2012 27 gi301 pressure/temperature conversion chart for r-410a pressure (psig) temp °f pressure (psig) temp °f pressure (psig) temp °f pressure (psig) temp °f pressure (psig) temp °f 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124...

  • Page 30

    12/03/2012 28 gi301 electrical installation warning disconnect all electrical power before electrically connecting or servicing the unit. Failure to disconnect the electrical power before working on this product can create a hazard leading to personal injury or death. Line voltage the nameplate and/...

  • Page 31

    12/03/2012 29 gi301 geo logic™ controller geo logic features the geo logic controller has a control strategy that will maximize the capabilities of the heat pump. The led information lights on the front will communicate the therm geo’s current stage and mode of operation. Geo logic also has the capa...

  • Page 32

    12/03/2012 30 gi301 note if a programmable thermostat is used, it is recommended that the program be set to disable. In programmable mode, the heating system must be oversized in order to recover from the setback. Since heat pumps are not typically oversized, they require a longer time to recover fr...

  • Page 33

    12/03/2012 31 gi301 figure 8 geo logic board assignment warning any changes made to switch settiings, jumpers, or accessories connected to the geo logic controller will require the geo logic controller to be power cycled for the changes to take effect..

  • Page 34

    12/03/2012 32 gi301 field setup overview thermostat connect all the standard heat pump connections. This will require 10 conductor thermostat cable. This thermostat wire should be routed through the knockout on the left side of the cabinet by the box containing the geo logic controller using the pro...

  • Page 35

    12/03/2012 33 gi301 tip – when working with the plug-in sensor terminal block and a cable (example, st), start with black wire. This can help hold the cable when working with the double white and red’s. The sensor has polarity, is sensitive to incorrect voltage, and must be protected from static vol...

  • Page 36

    12/03/2012 34 gi301 operational indicators front panel leds: power on (green led) on solid – normal pulsing – bad sensor 1 blinks every 2 seconds - bad st sensor 2 blinks every 2 seconds - bad ddt sensor 3 blinks every 2 seconds - bad lwt sensor 4 blinks every 2 seconds - bad cdt sensor hp stage 1 (...

  • Page 37

    12/03/2012 35 gi301 earth loop flow/source water limit (red led) on solid - no source flow lockout pulsing: open loop - lwt closed loop - lwt if lwt is less than this value a shutdown with 2 x acd’s (6 min) is performed this will not cause a hard lockout; it is simply a warning and a pause in the sy...

  • Page 38

    12/03/2012 36 gi301 back of circuit board – led’s stg 1-3 (red led’s) (not used on tst models) cc (green led) on when the compressor contactor (cc) is on. Ecm status (green led) (not used on tst models) ecm rpm (yellow led) (not used on tst models) fault count (red led, left side next to model size ...

  • Page 39

    12/03/2012 37 gi301 high and low pressure switches – the heat pump is equipped with both high and low pressure switches that shut the unit off if the refrigerant pressure exceeds 550 psi or goes below 40 psi. Do not reset a well water system in the heating mode without first verifying water flow. Wa...

  • Page 40

    12/03/2012 38 gi301 power on startup before applying power to the heat pump and furnace, check the following items: 1. All plumbing and ductwork to the heat pump and furnace is complete and operational. 2. Low voltage wiring of the thermostat, lmc/int, furnace/fan coil and any additional control wir...

  • Page 41

    12/03/2012 39 gi301 6. Turn the thermostat to the off position. 7. Place the thermostat in the “cool” position. Turn the thermostat down to activate a 1 st stage call for cooling. The compressor will start after a 3 minute acd period from its last shutdown.  the compressor and furnace/fan coil blow...

  • Page 42

    12/03/2012 40 gi301 operational tips geo logic - the geo logic board performs the functions controlling the compressor operation, system lockout, compressor anti-short cycle, and a three minute delay after power is applied. Review operational indicator section of this manual before proceeding. Pump/...

  • Page 43

    12/03/2012 41 gi301 troubleshooting – geo logic control sensor temperature calibration – all four remote sensors are digital electronic and factory calibrated. Normally these do not require field calibration or verification. However, if sensor temperature error is determined, use the special pc soft...

  • Page 44

    12/03/2012 42 gi301 routine continues the heat pump will not be able to maintain the temperature in the house and the backup heat will come on. Possible causes would include: open loop closed loop 1. Supply water filter that needs cleaning 1. Inadequate source water flow 2. Inadequate source water f...

  • Page 45

    12/03/2012 43 gi301 troubleshooting – general warning – refrigerant evacuation when refrigerant is evacuated from a unit without antifreeze in the water to refrigerant heat exchangers, water in the unprotected heat exchanger must be removed or continuously flowing to avoid a potential heat exchanger...

  • Page 46

    12/03/2012 44 gi301 preventive maintenance water coil maintenance –in closed loop systems, water coil maintenance is generally not needed. However, if a dirty installation or deterioration of the piping has caused debris to accumulate in the system, the water coil should be cleaned using standard cl...

  • Page 47

    12/03/2012 45 gi301 troubleshooting – general troubleshooting guide for water-to-air geo “heating” head pressure subcool suction pressure superheat compressor amp draw air temp differential source temp differential undercharged system low low low high low low low overcharged system high high high lo...

  • Page 49

    Txv-c geo loop field 7/8 1/2 7/8 1/2 txv-h 1/2 lwt ewt air coil - cond comp f/d pt-1 ll pt-2 hl sdw- coil dw-rt dw-st rv - - - - - - - - - - - line set - - - - - - - - - - - - - line set - - - bv bv fl bl t-3 name comp compressor hl pressure high limit ll pressure low limit pt pressure test port sdw...

  • Page 50

    Txv-c 7/8 1/2 7/8 1/2 geo loop field txv-h 1/2 lwt ewt f/d bv fl t-3 t-3a loop coil cond p p air coil - evap comp pt-1 ll pt-2 hl sdw- coil dw-rt dw-st rv - - - - - - - - - - - line set - - - - - - - - - - - - - line set - - - bv bl t-3 name comp compressor hl pressure high limit ll pressure low lim...

  • Page 52: Ttherm Geo™ Residential

    Page 1 of 2 gx002 ttherm geo™ residential limited product warranty effective february 1, 2012 ttherm geo warrants to the owner, at the original installation site, for a period of three (3) years from date of original purchase, that the product and product parts manufactured by ttherm geo are free fr...

  • Page 53

    Page 2 of 2 gx002 conditions and limitations: 1. This warranty is limited to residential, single family dwelling installations only. Any commercial or multi-unit dwelling installations fall under the ttherm geo commercial limited product warranty. 2. Ttherm geo shall not be liable for performance re...