Specifications

49
GT-PCS Split Units - 60Hz Puron
®
Created: 29 Aug., 2013
Unit Start-Up and Operating Conditions
 CAUTION! 
 CAUTION! 
CAUTION! To avoid equipment damage, DO NOT
leave system fi lled in a building without heat during the
winter unless antifreeze is added to the water loop. Heat
exchangers never fully drain by themselves and will
freeze unless winterized with antifreeze.
CAUTION! Verify that ALL water valves are open and
allow water fl ow prior to engaging the compressor.
Freezing of the coax or water lines can permanently
damage the heat pump.
Unit and System Checkout
BEFORE POWERING SYSTEM, please check the following:
UNIT CHECKOUT
 Shutoff valves: Insure that all isolation valves are open.
 Line voltage and wiring: Verify that voltage is within
an acceptable range for the unit and wiring and fuses/
breakers are properly sized. Verify that low voltage wiring
is complete.
 Unit control transformer: Insure that transformer has the
properly selected voltage tap. Residential 208-230V units
are factory wired for 230V operation unless specifi ed
otherwise.
 Loop/water piping is complete and purged of air. Water/
piping is clean.
 Antifreeze has been added if necessary.
 Entering water and air: Insure that entering water and air
temperatures are within operating limits of Tables 13a
and 13b.
 Low water temperature cutout: Verify that low water
temperature cut-out on the DXM2 control is properly set.
 HWG is switched off at SW 3-4 unless piping is
completed and air has been purged from the system.
 Unit air coil and fi lters: Insure that fi lter is clean and
accessible. Clean air coil of all manufacturing oils.
 Unit controls: Verify that DXM2 fi eld selection options are
properly set. Low voltage wiring is complete.
 Blower CFM and Water ∆T is set on communicating
thermostats or diagnostic tool.
 Service/access panels are in place.
SYSTEM CHECKOUT
 System water temperature: Check water temperature
for proper range and also verify heating and cooling set
points for proper operation.
 System pH: Check and adjust water pH if necessary to
maintain a level between 6 and 8.5. Proper pH promotes
system longevity (see Table 6).
 System fl ushing: Verify that all air is purged from the
system. Air in the system can cause poor operation or
system corrosion. Water used in the system must be
potable quality initially and clean of dirt, piping slag,
and strong chemical cleaning agents. Some antifreeze
solutions may require distilled water.
 Internal Flow Controller: Verify that it is purged of air and
in operating condition.
 Low water temperature cutout: Verify that low water
 WARNING! 
temperature cut-out controls are set properly
(LT1 - JW3).
 Miscellaneous: Note any questionable aspects of
the installation.
Unit Start-up Procedure
1. Turn the thermostat fan position to “ON.” Air Handler
Blower should start.
2. Turn Blower off.
3. Ensure all valves are adjusted to their full open position.
Ensure line power to the heat pump is on.
4. Room temperature should be within the minimum-
maximum ranges of listed in the unit IOM. During start-
up checks, loop water temperature entering the heat
pump should be between 30°F [-1°C] and 95°F [35°C].
5. It is recommended that water-to-air units be fi rst started
in the cooling mode, when possible. This will allow liquid
refrigerant to fl ow through the fi lter-drier before entering
the TXV, allowing the fi lter-drier to catch any debris that
might be in the system before it reaches the TXV.
6. Two factors determine the operating limits of geothermal
heat pumps, (a) return air temperature, and (b) entering
water temperature. When either of the factors is at a
minimum or maximum level, the other factor must be at
normal levels to insure proper unit operation.
a. Place the unit in Manual Operation. When in manual
mode activate Y1,Y2, and O to initiate the cooling
mode. Next adjust pump speed % until desired loop
temperature difference (leaving water temperature
minus entering water temperature) is achieved. (For
modulating valve adjust valve %).
WARNING! Polyolester Oil, commonly known as POE
oil, is a synthetic oil used in many refrigeration systems
including those with Puron
®
refrigerant. POE oil, if it ever
comes in contact with PVC or CPVS piping, may cause
failure of the PVC/CPVC. PVC/CPVC piping should
never be used as supply or return water piping with water
source heat pump products containing Puron
®
as system
failures and property damage may result.
INSTALLER SETTINGS
THERMOSTAT CONFIG
SYSTEM CONFIG
ACCESSORY CONFIG
INPUT DEALER INFO
HUMIDITY CONFIG
TEMPERATURE ALGORITHM
DEMAND REDUCTION CNFG
SERVICE MODE
RESTORY DEFAULTS
ATC32U01
SELECT OPTION
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