Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
PAGE NO.
SAFETY CONSIDERATIONS ..................... 1
INSTALLATION RECOMMENDATIONS ............ 2
CHECK EQUIPMENT & JOBSITE ................. 2
LOCATION / CLEARANCE ....................... 2
APPLICATION CONSIDERATIONS ................ 3
Earth Coupled (Geothermal) Systems .............. 3
Well Water Systems ............................ 4
MOUNTING VERTICAL UNITS ................... 7
MOUNTING HORIZONTAL UNITS ................ 7
CONDENSATE DRAIN ............................ 7
DUCT SYSTEM .................................. 8
PIPING ......................................... 8
ELECTRICAL ................................... 9
Thermostat Connections ......................... 9
SAFETY DEVICES AND UPM CONTROLLER ....... 9
SEQUENCE OF OPERATION ...................... 11
Cooling Mode ................................. 11
Heating Mode ................................. 11
HEAT RECOVERY PACKAGE ..................... 13
SYSTEM CHECKOUT ............................ 14
UNIT START-UP ................................. 14
MAINTENANCE ................................. 14
TROUBLESHOOTING ............................ 15
FLUID PRESSURE DROP TABLE .................. 17
TEMPERATURE RISE/FALL TABLE ............... 18
REFRIGERANT PRESSURE RANGES TABLE ....... 19
BLOWER PERFORMANCE TABLE ................ 20
Information in these installation instructions pertains only to GB
series units.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes and
current editions of the National Electrical Code ( NEC ) NFPA 70.
In Canada, refer to current editions of the Canadian electrical code
CSA 22.1.
Recognize safety information. This is the safety-alert symbol
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal iniury. Understand
these signal words; DANGER, WARNING, and CAUTION. These
words are used with the safety-alert symbol. DANGER identifies
the most serious hazards which will result in severe personal iniury
or death. WARNING signifies hazards which could result in
personal iniury or death. CAUTION is used to identify unsafe
practices which would result in minor personal iniury or product
and property damage. NOTE is used to highlight suggestions
which will result in enhanced installation, reliability, or operation.
ELECTRICALSHOCK HAZARD
Failure to follow this warning could result in personal
iniury or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out and
tag switch with a suitable warning label.
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal iniury,
and/or property damage.
Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors. Pressurized
mixtures of air or gases containing
oxygen can lead to an explosion.
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could result in personal iniury
or equipment damage.
Puron® refrigerant systems operate at higher pressures than
standard R-22 systems. Do not use R-22 service equipment
or components on Puron® refrigerant equipment.
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing and gloves when
handling parts.
INSTALLATION RECOMMENDATIONS
The GB Water-to-Air Heat Pumps are performance certified to
American Heating and Refrigeration Institute (AHRI) ISO
Standard 13256-1. All GB Water-to-Air Heat Pumps conform to
UL1995 standard and are certified to CAN/CSA C22.1 No 236 by
Intertek-ETL. The Water-to-Air Heat Pumps are designed to
operate with entering fluid temperature between 20°F to 90°F in
the heating mode and between 30°F to 120°F in the cooling mode.
Safety devices are built into each unit to provide the maximum
system protection possible when properly installed and maintained.
IMPORTANT: 50 ° Min. EWT (entering water temperature) for
well water applications with sufficient water flow to prevent
freezing. Antifreeze solution is required for all closed loop
applications. Earth Coupled (Geothermal) applications should have
sufficient antifreeze solution to protect against extreme conditions
and equipment failure. Frozen water coils are not covered under
warranty.
IMPORTANT: This product should not be used for temporarily
heating or cooling during construction. Doing so may effect the
unit's warranty.
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Discharge air configuration change is not possible on Heat
Pumps equipped with Electric Heat Option.
Check Equipment and Job Site
Movinu and Storage
If the equipment is not needed for immediate installation upon its
arrival at the job site, it should be left in its shipping carton and
stored in a clean, dry area. Units nmst only be stored or moved in
the normal upright position as indicated by the :'UP" arrows on
each carton at all times.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage.
If unit stacking is required for storage, stack units as follows:
Do not stack units larger than 6 tons!
Vertical units: less than 6 tons, no more than two high.
Horizontals units: less than 6 tons, no more than three high.
Inspect Equipment
Be certain to inspect all cartons or crates on each unit as received at
the job site before signing the freight bill. Verify that all items have
been received and that there are no visible damages; note any
shortages or damages on all copies of the freight bill. In the event
of damage or shortage, remember that the purchaser is responsible
for filing the necessary claims with the carrier. Concealed damages
not discovered until after removing the units from the packaging
must be reported to the carrier within 24 hours of receipt.
Location / Clearance
Locate the unit in an indoor area that allows easy removal of the
filter and access panels, and has enough room for service personnel
to perform maintenance or repair. Provide sufficient room to make
fluid, electrical, and duct connection(s). If the unit is located in a
confined space such as a closet, provisions nmst be made for return
air to freely enter the space. On horizontal units, allow adequate
room below the unit for a condensate drain trap and do not locate
the unit above supply piping.
[]NIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
These units are not approved for outdoor installation;
therefore, they must be installed inside the structure being
conditioned. Do not locate in areas that are subject to
freezing.
[]NIT DAMAGE AND/OR OPERATION HAZARD
Failure to follow this caution may result in equipment
damage and/or improper equipment operation.
It is extremely important to take the proper precautions to
insure that the heat pump unit is installed in the proper
location and that measures have been taken to prevent
rupturing the water coil due to freezing conditions.
Frozen water coils are not covered under the limited
product warrant,v.
APPLICATION CONSIDERATIONS
Earth Coupled (Geothermal) Systems
Closed loop and pond @plications require specialized design
knowledge. No attempt at these installations should be made unless
the dealer has received specialized training.
10
Anti-freeze solutions are utilized when low evaporating conditions
are expected to occur. Refer to the Flow Center installation
manuals for more specific instructions.
Fig. 1 - Earth Coupled Application
EARTH COUPLED APPLICATION
1. LINE VOLTAGE DISCONNECT (UNIT)
2. FLEX DUCT CONNECTION
3. LOW VOLTAGE CONTROL CONNECTION
4. LINE VOLTAGE CONNECTION (UNIT)
5. PIT PORTS
6. VIBRATION PAD
7. CONDENSATE DRAIN
8. GROUND LOOP CONNECTION KIT
9. GROUND LOOP PUMPING PACKAGE
10. POLYETHELENEWITH INSULATION
11. LINE VOLTAGE DISCONNECT (ELECTRIC
HEATER)
A14161
Well Water Systems
IMPORTANT: Table 1 must be consulted for water quality
requirements when using open loop systems. A water sample must
be obtained and tested, with the results compared to the table.
Scaling potential should be assessed using the pH/Calcium
hardness method. If the pH is <7.5 and the calcium hardness is
1<100 ppm, the potential for scaling is low. For numbers out of the
range listed, a monitoring plan must be implemented due to
probable scaling.
Other potential issues such as iron fouling, corrosion, erosion and
clogging must be considered. Careful attention to water conditions
must be exercised when considering a well water application.
Failure to perform water testing and/or applying a geothermal heat
pump to a water supply that does not fall within the accepted
quality parameters will be considered a mis-application of the unit
and resulting heat exchanger failures will not be covered under
warranty. Where a geothermal system will be used with adverse
water conditions, a suitable plate-frame heat exchanger MUST be
used to isolate the well water from the geothermal unit.
Proper testing is required to assure the well water quality is suitable
for use with water source equipment.
In conditions anticipating moderate scale formation or in brackish
water, a cupronickel heat exchanger is recommended. Copper is
adequate for ground water that is not high in mineral content.
In well water applications, water pressure must always be
maintained in the heat exchanger. This can be accomplished with
either a control valve or a bladder type expansion tank.
When well water is used exclusively for supplying water to the
heat pump, the pump should operate only when the heat pump
operates. A 24 volt double pole single throw (DP/ST) contactor
(Fig. 2) can be used to operate the well pump with the heat pump.
(_ POWER SUPPLY
UNIT II [
TEs_T_NALII L
DP/ST RELAY
[
POWER TO PUMP
A14166
Fig. 2 - 24 volt DP/ST Contactor
When two or more units are supplied from one well, the pump can
be wired to operate independently from either unit (see Fig. 3). An
up-sized VA transformer may be required in either case.
(_ POWER SUPPLY
TE# "', ALII' II I 20P;ST
STRIP II ,-.d-_e"'_-_l RELAYS_r'-:" "_
t t _ POWER
Fig. 3 - DP/ST Independent Wiring
q
TO PUMP
A14167
11
6
7
Fig. 4 - Well Water Application
WELL WATER APPLICATIONS (50°F EWT MIN.)
1. LIN E VOLTAGE DISGON NECT (U NIT)
2. FLEX DUCT CONNECTION
3. LOW VOLTAGE CONTROL CON NECTION
4. LIN E VOLTAGE CONN ECTION
5. VIBRATION PAD
6. PIT PORTS
7. HOSE KITS (Optional)
8. BALL VALVES
9. SOLENOID VALVE SLOW CLOSING
10. CONDENSATE DRAIN CON N ECTION
11. PRESSURETANK
12. LIN E VOLTAGE DISCON NECT ( ELECTRIC H EATER)
NOTE: SEE FIGURE #3 FOR CONDENSATE DRAIN CONNECTION
A14159
Pressure/temperature ports are recommended in both the supply
and return lines for system flow balancing. The water flow can be
accurately set by measuring the water-to-refrigerant heat
exchangers water side pressure drop. See the unit specification
sheets for the water flow and pressure drop information in the back
of this manual.
The discharge water from the heat pump is not contaminated in any
manner and can be disposed of in various ways depending on local
codes (i.e. discharge well, dry well, storm sewer, drain field,
stream, pond, etc.)
When using a single water well to supply both domestic water and
the heat pump care must be taken to insure that the well can
provide sufficient flow for both. In well water applications a slow
closing solenoid valve must be used to prevent water hammer.
Solenoid valves should be connected across Y and C on the
interface board for all. Make sure that the VA draw of the valve
does not exceed the contact rating of the thermostat.
Pressure/temperature ports are recommended in both supply and
return lines for system flow balancing. Water flow can be
accurately set by measuring the water-to-refrigerant heat
exchangers water side pressure drop. See specification sheets for
water flow vs. pressure drop information in the back of this
manual.
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation,
Water piping exposed to extreme low ambient
temperatures is subject to freezing.
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Discharge air configuration change is not possible on Heat
Pumps equipped with Electric Heat Option,
Table 1 - Water Quality Requirements for Open-Loop Geothermal Heat Pump System
Parameter HX Material Closed Recirculating Open Loop and Recirculating Well
pH/Calcium Hardness
Method
Ryznar Stability Index All --
All pH <7.5 and Ca Hardness <100ppm
6.0 - 7.5
If > 7.5 minimize steel pipe use
-0.5 to +0.5
Langelier Saturation Index All --
If <-0.5 minimize steel pipe use.
Based upon 150°F HWG and Direct well,
84°F Indirect Well HX
<0.2 ppm (Ferrous)
Iron Fe2 (Ferrous) All -- If Fe2. (ferrous) >0.2 ppm with pH 6-8, 02<5 ppm check
(Bacterial Iron Potential) for iron bacteria
Iron Fouling All --
pH All
6 - 8.5 6 - 8.5
Monitor/treat as needed Minimize steel pipe below 7 and no open tanks with pH <8
<0.5 ppm of Oxygen
Above this level deposition will occur
At H S>0.2 ppm, avoid use of copper and copper nickel
Hydrogen Sulfide (H2S) All --
piping or HXs. Rotten egg smell appears at 0.5 ppm level.
Copper alloy (bronze or brass) cast components are OK
to <0.5 ppm
Ammonia ion as hydroxide,
chloride, nitrate and sulfate All -- <0.5 ppm
compounds
Maximum Allowable at Maximum Water Temperature
50°F 75°F 100°F
Copper -- <20 ppm NR NR
Maximum Chloride Levels cupronickel -- <150 ppm NR NR
304 SS -- <400 ppm <250 ppm <150 ppm
316 SS -- <1000 ppm <550 ppm <375 ppm
Titanium -- >1000 ppm >550 ppm >375 ppm
_i _ ........
<10 ppm of particles and a <10 ppm (<1 ppm "sandfree" for re-injection) of particles
Particulate Size and All maximum velocity of 1.8 m/s. and a maximum velocity of 1.8 m/s. Filtered for maximum
Erosion Filtered for maximum 841 mi- 841 micron [0.84 mm. 20 mesh] size. Any particulate that
cron [0.84 mm 20 mesh] size is not removed can potentially clog components
NOTES:
Closed recirculating system is identified by a closed pressurized piping system.
Recirculating open wells should observe the open recirculating design considerations.
NR - application not recommended
"--" No design Maximum
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