Bard WPV 30B, WPV 36B, WPV 53B, WPV 62B water source heat pump Installation instructions

 INSTALLATION INSTRUCTIONS
HIGH EFFICIENCY
WATER SOURCE
PACKAGED HEAT PUMPS
MODELS
WPV30B
WPV36B
WPV53B
WPV62B
Ground Water Temperatures 45 - 75
Earth Loop Fluid
Temperatures 30 - 110 F
MANUAL 2100-155 REV. E
SUPERSEDES REV. D
FILE VOL. I, TAB 8
COPYRIGHT FEBRUARY, 1989
BARD MANUFACTURING COMPANY
BRYAN, OHIO
II.
111.
IV.
VI.
VII.
VIII.
IX.
INDEX
General
Installation . . .
BTUH Capacity Selection .
Site Selection .
Ductwork
Filter
Electrical Wiring .
A. Main Power
Un с) NO >=
Condensate Drain . . .
Piping Access To The Unit ‚
Water Connections .
Well Pump Sizing
LO COP o
Sequence Of Operation . .
1. Cooling With Or Without Duct ‘Heaters
2. Single Stage Heat Without Duct Heaters
3. Two Stage Heat With Duct Heaters
4. Emergency Heat ea
System Start Up Procedure .
Water Corrosion .
Remedies Of Water Problems
Lake and Pond Installations .
Earth Coupled Ground Loop Applications
Add-On Heat Recovery Hot Water Heater .
Installation .
Start-Up, Check-Out Maintenance .
Heat Pump Service . coe.
B. Control Circuit--Low Voltage Wiring )
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WATER SOURCE HEAT PUMP
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I. GENERAL
Units are shipped completely assembled and internally wired, requiring only duct connections, thermostat
wiring, 230-208 volt AC power wiring, and water piping. The equipment covered in this manual is to be
installed by trained, experienced service and installation technicians. Any heat pump is more critical of
proper refrigerant charge and an adequate duct system than a cooling only air conditioning unit,
These instructions and any instructions packaged with any separate equipment required to make up the entire
heat pump system should be carefully read before beginning the installation, Note particularly any tags and/or
labels attached to the equipment.
While these instructions are intended as a general recommended quide, they do not in any way supersede any
national and/or local codes. Authorities having jurisdiction should be consulted before the installation is
made.
Unpacking
Upon receipt of the equipment, the carton should be checked for external signs of shipping damage. If damage
is found, the receiving party must contact the last carrier immediately, preferably in writing, requesting
inspection by the carrier's agent.
II. INSTALLATION
1. BTUH Capacity Selection
Capacity of the unit for a proposed installation should be based on heat loss calculations made in accordance
with methods of the Air Conditioning Contractors of America, formerly National Warm Air Heating and Air
Conditioning Association. The air duct system should be sized and installed in accordance with Standards of
the National Fire Protection Association For The Installation of Air Conditioning and Ventilating Systems of
Other Than Residence Type NFPA No. 90A, and Residence Type Warm Air Heating and Air Conditioning Systems, NFPA
No. 90B,
2. Site Selection
The unit may be installed in a basement, closet or utility room provided adequate service access is insured.
Ideally, three sides of the unit should have a minimum access clearance of two feet but the unit can be
adequately serviced if two or only one side has the minimum two feet clearance. The unit should be located in
the conditioned space to prevent freezing of the water lines.
Clearance to combustible materials is Ô inches for the heat pump. If an optional duct heater is installed,
follow the instructions packed with the duct heater for specifications regarding clearance to combustible
naterial.
Before setting the unit, consider ease of piping, drain and electrical connections for the unit. Also, for
units which will be used with a field installed heat recovery unit, consider the proximity of the unit to the
vater heater or storage tank, Place the unit on a solid base, preferably concrete, to minimize undesirable
noise and vibration, DO NOT elevate the base pan on rubber or cork vibration eliminator pads as this will
permit the unit base to act like a drum, transmitting objectionable noise,
3. Ductwork
If the unit is to be installed in a closet or utility room which does not have a floor drain, a secondary drain
pan under the entire unit is highly recommended.
DO NOT install the unit in such a way that a direct path exists between any return grille and the unit.
Rather, insure that the air entering the return grille will make at least one Lurn before entering the unit air
coil. This will reduce possible objectionable compressor and air noise from entering the occupied space.
Design the ductwork according to methods given by the National Warm Air Heating and Air Conditioning
Association, When duct runs through unconditioned spaces, it should be insulated with vapor barrier. It is
recommended that flexible connections be used to connect the ductwork to the unit in order to keep the noise
transmission to a minimum,
4, Filter
This unit must not be operated without a filter. It comes equipped with a disposable filter which should be
checked often and replaced if dirty. Insufficient air flow due to undersized duct systems or dirty filters can
result in nuisance tripping of the high or low pressure control, Refer to Table 2 & 3 for correct air flow and
static pressure requirements. See Figure 3.
FIGURE 3
A =
\J
All electrical connections are made through the top of the unit. High voltage connections are made with wire
nuts to the {actory-provided pigtail leads in the junction box, Low voltage connections are made to the
terminal strip mounted on the top of the unit, Refer to the wiring diagram for connecting the terminals.
5. Electrical Wiring
A. Main Power
Refer to the unit serial plate for wire sizing information and correct overcurrent protection size. Each unit
is marked with a "Minimum Circuit Ampacity.” This means that field wiring connectors must be sized to carry
that amount of current. Each unit and/or wiring diagram is also marked "Use Copper Conductors Only,” meaning
the leads provided are not suitable for aluminum wiring. Refer to the National Electric Code for complete
current-carrying capacity data on the various grades of wiring material.
The unit rating plate lists "Maximum Overcurrent Prolective Device” Lhat 15 to be used wilh the equipment.
This device may be a time delay fuse or HACR type circuit breaker. The correct size overcurrent protective
device must be used to provide for proper circuit protection and to avoid nuisance trips due Lo the momentary
high starting current of the compressor motor.
В. Control Circuit--Low Voltage Wiring
A 24 volt terminal strip is mounted on top of the unit, Two types of thermostats are available: 1) Single
stage heat, single stage cool to cperate the heat pump alone--without backup duct style electric heaters. This
thermostat is equipped with a signal light to indicate when the unit is "locked out” because of the low or high
pressure control. Refer to the wiring diagrams at the end of this manual for correct connection of the
terminals. 2) Two stage heat, single stage cool to operate the heat pump or duct heaters on heating or the
heat pump on cooling. This thermostat is also equipped with a signal light to indicate when the unit is
"locked out” because of operation of the low or high pressure control, In addition, a second signal light
tells when the unit has been placed in Emergency Heat. Refer to the wiring diagram at the end of this manual
and to the wiring diagram packed with the duct heater for correct connection of the low voltage terminals.
6. Condensate Drain
Determine where the drain line will run. This drain line contains cold water and must be insulated to avoid
droplets of water from condensing on the pipe and dropping on finished floors or the ceiling under the unit, A
trap MUST BE installed in the drain line and the trap filled with water prior to start up. The use of plugged
tees in place of elbows to facilitate cleaning is highly recommended.
Drain lines must be installed according to local plumbing codes. It is not recommended that any condensate
drain line be connected to a sewer main. The drain line enters the unit through the water access panel, ((3)
Figure 4) and connects to the FPT coupling under the condensate drain pan.
7. Piping Access To The Unit
Water piping to and from the unit enters the unit casing through the water access panel. Piping connections
are made directly to the heat exchanger coil and are 3/4" or 1" FPT. The access panel can be installed on any
one of three sides (any side of the casing except the air coil side). It is highly recommended that the piping
fron the water coil to the outside of the casing be installed while the unit is completely accessible and
before it is finally set in position.
8. Water Connections
It is very important that an adequate supply of clean, non-corrosive water at the proper pressure be provided
before the installation is made. Insufficient water, in the heating mode for example, will cause the low
pressure control to trip, shutting down the heat pump. In assessing the capacity of the water system, it is
advisable that the complete water system be evaluated to prevent possible lack of water or water pressure at
various household fixtures whenever the heat pump turns on. All plumbing to and from the unit is to be
installed in accordance with local plumbing codes. The use of plastic pipe, where permissible, is recommended
to prevent electrolytic corrosion of the water pipe. Because of the relatively cold temperatures encountered
with well water, it is strongly recommended that the water lines connecting the unit be insulated to prevent
vater droplets from condensing on the pipe surface.
Refer to Piping, Figure 4. Slow closing Solenoid Valve (6) with a 24V coil provides on/off control of the
water flow to the unit, Refer to the wiring diagram for correct hookup of the valve solenoid coil.
Constant Flow Valve (7) provides correct flow of water to the unit regardless of variations in water pressure.
Observe the water flow direction indicated by the arrow on the side of the valve body. Following is a table
showing which valve is to be installed with vhich heat pump.
Constant
Reat Pump Flow Flow Yalve
Model Rate Part Number |
"РУЗОВ 4 GPM 8603-010
WPY36B 5 GPM 8603-011
NPY53B 6 GPM 8603-007
WPYG2B 8 GEM 8603-008
Strainer (5) installed upstream of constant flow valve (7) to collect foreign material which would clog the
flow valve orifice.
The figure shows the use of shut-off valves (9) and (11), on the in and out water lines to permit isolation of
the unit from the plumbing system should future service work require this. Clobe valves should not be used as
shutoff valves because of the excessive pressure drop inherent in the valve design. Instead use gate or ball
valves as shut-offs so as to minimize pressure drop.
Drain cock (8) and (10), and tees have been included to permit acid cleaning the refrigerant-to-water coil
should such cleaning be required. See WATER CORROSION.
Drain Cock (12)provides access to the system to check water flow through the constant [low valve to insure
adequate water flow through the unit. A water meter 1-10 GPM (8603-013) is used to check the water [low rate,
FIGURE 4
9. Well Pump Sizing
Strictly speaking, sizing the well pump is the responsibility of the well drilling contractor. It is
important, however, that the HYAC contractor be familiar with the factors that determine what size pump will be
required. Rule of thumb estimates will invariably lead to under or oversized well pumps. Undersizing the pump
will result in inadequate water to the whole plumbing system but with especially bad results to the heat
pump--NO HEAT/NO COOL calls will result. Oversized pumps will short cycle and could cause premature pump motor
or switch failures.
The well pump must be capable of supplying enough water and at an adequate pressure to meet competing demands
of water fixtures. The well pump must be sized in such a way that three requirements are net:
1. Adequate flow rate in GPM.
д. Adequate pressure at the fixture.
3. Able to meet the above from the depth of the well-feet of lift.
The pressure requirements put on the pump are directly affected by the diameter of pipe being used as well as
by the water flow rate through the pipe. The worksheet included in manual 2100-078 should quarantee that the
well pump has enough capacity. It should also ensure that the piping is not undersized which would create too
nuch pressure due to friction loss. High pressure losses due to undersized pipe will reduce efficiency and
require larger pumps and could also create water noise problems.
ITI. SEQUENCE OF OPERATION
1. Cooling With Or Without Duct Heaters
Whenever the system lever is moved to COOL, thermostat system switch completes a circuit R to 0, energizing the
reversing valve solenoid. On a call for cooling, the cooling bulb completes a circuit from R to G, energizing
the blower relay coil. The blower relay contacts complete a 230 volt circuit to the blower motor and the
blower operates. R to Y circuit is completed at the same time as the fan circuit and current flows from Y to
terninal 4 at the lockout relay. Terminal 4 of the lockout relay provides two paths for current flow.
1. Through the lockout relay coil which offers the resistance of the lockout relay coil.
2. Through the normally closed contacte of the lockout relay to terminal 5 of the lockout relay and then
through the high and low pressure switches to the compressor contactor coil,
If the high and low pressure switches remain closed (refrigerant pressure remains normal), the path of least
resistance is through these safety controls to the compressor contactor coil, The contacts of the compressor
contactor complete a 230 volt circuit to the compressor and the compressor runs. If discharge (suction)
pressure reaches the set point of the high (low) pressure control, the normally closed contacts of the high
(low) pressure control open and current no longer flows to the compressor contactor coil--the coil drops out.
Current now can take the path of least resistance through the lockout relay coil, energizing the lockout relay
coil and opening terminals 4 and 5 of the lockout relay. The lockout relay will remain energized as long as a
circuit is completed between R and Y at the thermostat. In the meantime, since the compressor is not
operating, refrigerant pressure will equalize and the high (low) pressure switch will automatically reset.
However, the circuit to the compressor contactor will not be complete until the lockout relay is de-energized
by moving the thermostat system switch to OFF, breaking the circuit from R to Y dropping out the lockout relay
coil and permitting terminalis 4 and 5 to make, When Lhe high (low) pressure switch closes, a circuit is
conplete to L at the thermostat, energizing the signal light to indicate a malfunction, When the system switch
is moved from OFF to COOL, the cycle is repeated.
2. Single Stage Heat Without Duct Heaters
Compressor circuit R to Ÿ including lockout relay and pressure controls is the same as cooling, Blower circuit
R to G is the same as cooling. With system switch set to HEAT, no circuit is completed between R and O and
reversing valve solenoid is not energized.
3. Two Stage Heat With Duct Heaters
First stage heat is the same as single heating without duct heater. When the second stage thermostat bulb
nakes, a circuit is completed from C to W2, energizing the duct heater heat contactor, through the heating
element and manual reset limit. C to W2 also simultaneously energizes the 24 voit coil on the
interlock relay, closing the contacts, which in turn energize the low voltage coil on the blower relay to close
the high voltage contacts and power the blower motor. The elements and blower remain energized as long as C to
W2 are made.
The following is a verbal description of the proper procedure for connecting the low voltage hookups for the
duct heater.
1. Black wire from duct heater to C on the 24 volt terminal block.
2. Green wire from duct heater to green wire from thermostat, These wires must be wire nutted and isolated
from the terminal block. Failure to do so will result in improper heater operation,
3. Connect green with tracer from heater to the G terminal on the 24 volt terminal block.
4. Connect the white wire from the heater to W2 on 24 volt terminal block.
A. For the 15 and 20kw duct heaters, connect the white and white with black tracer wires to W2.
4. Emergency Heat
When the system switch is moved to EMER, the compressor circuit R to Y is disconnected, Control of the
electric heaters is fron C to W2 and W3 through the thermostat second stage heating bulb. Blower opération is
controlled by the second stage heating bulb. Operation is the same as above, "Two Stage Heat With Duct
Heaters."
IV. SYSTEM START UP PROCEDURE
|. Be sure main power to the unit is OFF at disconnect.
2. Set thermostat system switch to OFF, fan switch to AUTO,
3. Move main power disconnect to ON. Power should be on to unit for a minimum of four hours or sixty minutes
per pound of refrigerant. This allows the crankcase heater to drive any refrigerant liquid out of the
conpressor sump. This procedure should be followed whenever the power has been off for twelve hours or
longer. Except as required for safety while servicing--NO NOT OPEN THE UNIT DISCONNECT SWITCH.
4, Check system air flow for obstructions.
A. Move thermostat fan switch to ON. Blower runs.
В, Be sure all registers and grilles are open.
C. Move thermostat fan switch to AUTO. Blower should stop.
5. Fully open the manual inlet and outlet valves.
6. Check water flow.
A. Connect a water flow meter to the drain cock (12, Figure 4) between the constant flow valve and the
solenoid valve. Run a hose from the flow meter to a drain or sink. Open the drain cock.
B. Check the water flow rate through constant flow valve to be sure it is the same as the unit is rated
for. (Example 4 GPM for a WPY30) |
С. When water flow is okay, close drain cock and remove the water flow meter. The unit is now ready to
start,
7. Start the unit in cooling mode. By moving the thermostat switch to cool, fan should be set for AUTO.
A. Check to see the solenoid valve opened,
8. Check the system refrigerant pressures against the cooling refrigerant pressure Table 11, Page 19 in the
Installation Manual for rated water flow and entering water temperatures. If the refrigerant pressures do
not match, check for air [low problem then refrigeration system problen.
9. Switch the unit to the heating mode. By moving the thermostat switch to heat, fan should be set for AUTO.
A. Check to see the solenoid valve opened again.
10. Check the refrigerant system pressures against the heating refrigerant pressure Table 12, Page 20 in
Installation Manual. Once again, if they do not match, check for air flow problems and then refrigeration.
system problems,
NOTE: If a charge problem is determined (high or low}:
Check for possible refrigerant leaks.
Discharge all remaining refrigerant from unit.
Evacuate unit down to 29 inches of vacuum,
Recharge the unit with refrigerant by weight. This is the only way to insure a proper charge.
Кр a OF све
V. WATER CORROSION
Two concerns will immediately come to light when considering a water source heat pump, whether for ground water
or for a closed loop application: Will there be enough water? And, how will the water quality affect the
system?
Water quantity is an important consideration and one which is easily determined. The well driller must perform
a pump down test on the well according to methods described by the National Well Water Association. This test,
if performed correctly, will provide information on the rale of [low and on the capacity of the well, It is
important to consider the overall capacity of the well when thinking about a water source heat pump because the
heat pump may be required to run for extended periods of time,
The second concern, about water quality, is equally important. Generally speaking, if the water is not
offensive for drinking purposes, it should pose no problem for the heat pump. The well driller or local water
softening company can perform tests which will determine the chemical properties of the well water.
Water quality problems will show up in the heat pump in one or more of the following ways:
1. Decrease in water flow through the unit.
2. Decreased heat transfer of the water coil (entering to leaving water temperature difference is less).
There are four main water quality problems associated with ground water. These are:
1. Biological Growth, This is the growth of microscopic organisms in the water and will show up as a slimy
deposit throughout the water system. Shock treatment of the well is usually required and this is best left
up to the well driller. The treatment consists of injecting chlorine into the well casing and flushing the
system until all growth is removed.
2. Suspended Particles In The Water, Filtering will usually remove most suspended particles (fine sand, small
gravel) from the water. The problem with suspended particles in the water is that it will erode metal
parts, pumps, heat transfer coils, etc, So long as the filter is cleaned and periodically maintained,
suspended particles should pose no serious problem. Consult with your well driller.
3. Corrosion Of Metal. Corrosion of metal parts results (from either highly corrosive water (acid water,
generally not the case with ground water) or galvanic reaction between dissimilar metals in the presence of
water. By using plastic plumbing or dielectric unions galvanic reaction is eliminated. The use of
corrosion resistant materials (such as the Cupro Nickel coil) through the water system will reduce
corrosion problems significantly.
4. Scale Formation. Of ail the water problems, the formation of scale by ground water is by far the most
common. Usually this scale is due to the formation of calcium carbonate but magnesium carbonate or calcium
sul{ate may also be present. Carbon dioxide gas (CO2), the carbonate of calcium and magnesium carbonate,
is very soluble in water. It will remain dissolved in the water until some outside factor upsets the
balance. This outside influence may be a large change in water temperature or pressure, When this
happens, enough carbon dioxide gas combines with dissolved calcium or magnesium in the water and falls out
of solution until a new balance is reached, The change in temperature that this heat pump produces is
usually not high enough to cause the dissolved gas to fall out of solution. Likewise if pressure drops are
kept to a reasonable level, no precipitation of carbon dioxide should occur.
VI. REMEDIES OF WATER PROBLEMS
Water Treatment. Water treatment can usually be economically justified for closed loop systems. Rowever,
because of the large amounts of water involved with a ground water heat pump, water treatment is generally too
expensive,
Acid Cleaning The Water Coil Or Heat Recovery Unit. If scaling of the coil is strongly suspected, the coil can
be cleaned up with a solution of Phosphoric Acid (food grade acid). Follow the manufacturer's directions for
nixing, use, etc. Refer to the "Cleaning Water Coil”, Figure 5. The acid solution can be introduced into the
heat pump coll through the hose bib (Part 8 of Figure 5), Be sure the isolation valves (Parts 9 and 11 of
Figure 5) are closed to prevent contamination of the rest of the system by the coil. The acid should be pumped
from a bucket into the hose bib (Part 8, Figure 5) and returned to the bucket through the other hose bib (Part
10, Figure 5). Follow the manufacturer's directions for the product used as to how long the solution is to be
circulated, but it is usually circulated for a period of several hours.
FIGURE 5
po DEF
ACID SOLUTION
<> (See Text)
VII. LAKE AND POND INSTALLATIONS
Lakes and ponds can provide a low cost source of water for heating and cooling with a ground water heal pump.
Direct usage of the water without some filtration is nol recommended as algae and turbid water can foul the
water to freon heat exchanger. Instead, there have been very good results using a dry well dug next to the
water line or edge. Normal procedure in installing a dry well is to backhoe a 15 to 20 foot hole adjacent to
the body of water (set backhoe as close to the water's edge ns possible). Once excavated, a perforated plastic
10
casing should be installed with gravel backfill placed around the casing. The gravel bed should provide
adequate filtration of the water to allow good performance of Lhe ground water heat pump.
The following is a list of recommendations to follow when installing this type of systen:
A.
A lake or pond should be at least 1 acre (40,000 square feet) in surface area for each 50,000 BTUs of
ground water heat pump capacity or have 2 times the cubic feet size of the dwelling that you are trying to
heat (includes basement if heated).
The average water depth should be at least 5 feet and Lhere should be an area where the water depth is at
least 12 to 15 feet deep.
If possible, use a submersible pump suspended in the dry well casing. Jet pumps and other types of suction
pumps normally consume more electrical energy than similarly sized submersible pumps. Pipe the unit the
same as a water well system.
Size the pump to provide necessary GPM for the ground water heat pump. A 12 GPM or greater water flow rate
is required on all modes when used on this type system,
A pressure tank should be installed in the dwelling to be heated adjacent to the ground water heat pump. A
pressure switch should be installed at the tank for pump control.
Ail plumbing should be carefully sized to compensate for friction losses, etc., particularly if the pond or
lake is over 200 feet from the dwelling to be heated or cooled.
Keep all water lines below low water level and below the frost line.
Most installers use 4-inch field tile (rigid plastic or corrugated) for water return to the lake or pond.
The drain line discharge should be located at least 100 feet from the dry well location.
The drain line should be installed with a slope of 2 inches per 10 feet of run to provide complete drainage
of the line when the ground water heat pump is not operating. This gradient should also help prevent
freezing of the discharge where the pipe terminates above the frost line,
locate the discharge high enough above high water level so the water will not back up and freeze inside the
drain pipe.
Where the local conditions prevent the use of a gravity drainage system to a lake or pond, you can instead
run standard plastic piping out into the pond below the frost and low water level,
WARNING
THIN ICE MAY RESULT IN THE
VICINITY OF THE DISCHARGE LINE.
11
For complete information on water well systems and lake and pond applications, refer to Manual 2100-0788 (or
later edition), available from your distributor,
VIII. EARTH COUPLED GROUND LOOP APPLICATIONS
This unit is also designed to work on earth coupled ground loop systems, however these systems operate at
entering water (without antifreeze) temperature well below the temperature normally experienced in water well
system. Therefore, when this unit is connected to an earth coupled ground Icop, an optional thermostat kit,
8620-002, is required. The kit consists of a SPST thermostat to sense refrigerant temperature and shut off
compressor should extremely low antifreeze temperatures or loss of flow occur. See Installation Instructions
for thermostat kit packed with the thermostat.
When used on these systems, Item 5 strainer, Item 6 solenoid valve, and Item 7 constant flow valve (refer to
Figure 4) are not needed. An external circulating pump must be used.
For information on earth coupled loop design, piping connections to heat pump and installation refer to Manual
2100-099G, "Earth Coupled Loop System Design Manual," available from your distributor.
FIGURE 6
We!l Cap
Y Y Y Y VY y ¥
LAKE AND POND APPLICATIONS |
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IX. ADD-ON HEAT RECOVERY HOT WATER HEATER
NOTE: This section applies only if a water heating recovery device is added.
GENERAL
This high efficiency water source heat pump series was designed for easy field installation of a heat recovery
device for hot water heating commonly known as a desuperheater water heater. The amount of annual hot water
supplied and thus additional energy cost savings will depend on the amount of hot water your family uses and
the number of hours your heat pump operates. We recommended that a U.L. recognized heat recovery device be
used, This device must be suitable for potable water.
Installation
1. Fellow all local, state and national codes applicable to the installation of heat recovery devices.
2. Follow the installation procedures you receive with the heat recovery device.
3, Connect the refrigerant lines between the heat recovery device and the heat recovery valves in the heat
pump using the inlet and exit panel on the lower left side of the unit as shown in Figure 7. Keep dirt and
moisture out of the inter-connecting tubing using good refrigeration service procedures. (See Figure 7).
Use refrigeration grade (type L) copper tubing. The tube diameter should be the same as the valve for
lengths up to 15 feet each way. For lengths between 15 and 25 feet, increase the diameter 1/8". Avoid
placing the heat recovery device over 25 feet from the heat pump.
This tubing should be insulated with Armaflex insulation. Tubing should be protected from abrasion and damage.
FIGURE 7 _- >.
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oo
\
- 50 ”
CONNECTION BETWEEN OUTLET OF 0 -
HEAT RECOVERY DEVICE AND п
DISCHARGE LINE TO REVERSING VALVE
CONNECTION FROM COMPRESSOR DISCHARGE
TUBE TO INLET OF HEAT RECOVERY
DEVICE
REFIRIGERANT FLOW
13
“
Evacuate the heat recovery device inter-connecting tubing and heat exchanger through the process service
ports A or B shown in Figure 8 and pressurize with Refrigerant 22 and perform a leak check. Release the
charge used for pressurization, leak check and re-evacuate. Add 1 ounce of refrigerant for each 10 feet of
additional interconnecting tubing to the total system charge. Replace the caps and tighten.
FIGURE 8
PROCESS
SERVICE
PORT *g*
TD REVERSING YALVE
LP
Cas
GEL
N x
N
PINCH DISCHARGE TUBE CLOSED AS SHOWN, USING A
REFRIGERATION PINCH OFF TOOL WITH SMOOTH ROUNO -
pe PROCESS \ PLUNGER EDOES. DO NOT USE PLIERS (R SIMILAR
SERVICE cap gr TOOL WITH SHARP EDGES THAT COULD DAMAGE THE
COPPER TUBING AND REDUCE [TS STRENGTH.
FROM COMPRESSOR DISCHARGE
14
5. Tighten the plunger caps "C" and "D" shown in Figure 8. This forces down a plunger which shears a
frangible plug and moves it out of the refrigerant flow path (see Figure 9). This now permits the
discharge refrigerant from the compressor to flow through valve at plunger "C" (Figure 8) to the heat
recovery coll heat exchanger and back through the valve at plunger "D" and then to the condenser inlet,
FIGURE
NN
ZANT
N
SS
e аа TTT: Matal:Lo-Metal Seal
ZAS AE
ER НЕ Y
AN ZAHN
ANN LEN
ALS NY J N
O-Ring ASE O-Ring HS |
NN IH ——0-Rine
Plunger N JE Plunger Plunger
| _~Frangible Plug
Ц
В
нЕ!
.
UH
\ — frangible Plug
(JT Relining Cup a Retaining Cup
When the plunger cap is tightened, The O-Ring seal
the plunger shears the frangible
plug forcing it into the retaining
cup. This opens the valve for
Frangitle Plug
Retaining Cup
on Lhe plunger ~ Tightening the plunger cap 1/4
prevents leakage while the valve turn after it bottoms results in a
is being opened. netal-to-netal seal.
6. Wire the heat recovery device per the diagram supplied with the heat recovery unit, Turn power to the air
conditioner off prior to wiring the heat recovery unit, DO NO in any way alter any factory or safety
circuits on the air conditioner.
Start-Up, Check-Out Maintenance
Follow the procedures supplied with the heat recovery unit,
Heat Pump Service
While performing any heat pump service analysis, turn water pump switch to off as it could affect the
refrigerant pressures and be misleading.
15
TABLE | _
ACCESSORY ITEMS--DUCT HEATER (See drawing below)
Minimum | Wire Size | Max. Dimensions >
Part No. PH | Volts | KW | Ampacity | CU AL | Fuse | AL BIC IDIELE
8604-080 1 240 5 21 #10 48 30 8 110 | 4 } 7j 7112
8604-081 1 | 240 {9.8 52 #6 #41 55 | 8 [10 | 4 | 7 | 7 [16 -
AD 240 [14.7 78 #4 #1 | 8 |15 {18 | 4 | 1 | 9 |18
8604-0832) 1 240 [19.2 100 #2 #0 | 100 1125 118 | 4 [11 | 9118
> Use wire suitable for a least 75 degree E,
2) Fused units (over 48 anperes).
TABLE 2
[NDOOR BLOWER PERFORMANCE
CEM--DRY COIL WITH FILTER (1)
Mode] WPY30B WPY53B, WPY628 With WPY53B, WPV62B Without
WPY3GB Ontional Cwá45 Installed Ontional Cw45 Installed
E.S.P. In.| High ¡Mediun| Low | High | Medium | Low High Medium
WC.
0 1400 | 1270 | 1210 | 1920 | 1780 | 1600 1920 1750
‚10 1345 | 1230 | 1170 | 1880 | 1750 | 1580 1880 1710
.20 1280 | 1180 | 1130 | 1830 | 1720 | 1550 1830 1670
‚ 30 1210 | 1110 | 1090 { 1810 1680 1540 1750 1630
‚ 40 1130 | 1070 | 1040 | 1750 | 1630 | 1500 1700 1570
.50 1050 | 1000 | 980 | 1650 | 1570 | 1440 1610 1520
‚ 60 970 | 890 | 900 | 1580 { 1500 | 1400 1550 1450
(1) For wet coil CFM multiply by .96
TABLE 3 TABLE 4
Rated Recommended CONSTANT FLOW VALVES
Model CFM Air Flow Range--CFM Min. Available Flow Rate
HPY3OR 1000 900 - 1090 Part No. Pressure PSIG СРМ
WPY36B | 1200 1070 - 1345 8603-007 На 6
WPY53B | 1550 1400 - 1700 8603-008 15 8 -
WPV62B 1700 1530 - 1830 8603-010 15 4
| _8603-011 15 0 5
TABLE 5 (D The pressure drop through the constant
WATER COIL PRESSURE DROP flow valve will vary depending on the
Моде! | WPY30B | WPV36B | WPVS3B | WEYOZB available pressure ahead of the valve,
GEM PSIG PSIG PSIG PSIG Unless a minimum of 15 psig is available
4 2.0 1.9 -- -- innediately ahead of the valve no vater
5 3.0 2.0 -- -- will flow
6 4,2 2.4 2.5 2.5
7 5.7 3.0 3.2 3.5
8 7.5 3.9 4,0 4,5
9 9.5 5.5 5.2 5.6
10 12.0 7.6 6.5 6.7
11 14.8 10.4 7.7 8.0
12 17.6 15.3 9.0 9.3
13 20.3 20.6 10.5 10.7
14 > -- 12.0 12.3
15 -- -- 13.9 15.5
16 -- ~~ 15.8 18.3
TABLE 6
FLOW RATES REQUIRED TO
MAINTAIN RATED CAPACITY WPY3OB | WEV36B| WPY53B/ NPY62B
Flow rate required CPM vater 4 5 6 8
Flow rate required GPM 15% propylene glycol | 5.2 | 6.5 | 7.8 | 10.4 | e
Flow rate required GPM 30% propylene glycol | 6.4 | 8.0 | 9.6 | 12.8 LT Air Flow
16
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MEFEA 10 COMTIVIL CIMCULT WERING Cpt CONTROL PANEL
CNCA ANT INSTALLATION INSTRUCTIONS FOR HAOK-UP
(F OPTIMHAL, OUCT HEATER
IMERSION CANMCASE HEATER
ne
SILENTID YAL
PANT 4 ET ET MEAT AMTICIDAJOS AT
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AN fan switch shown in “Muto” positien,
This wiring diagram is for use with the units listed below and
the following duct heaters: 8604-080,8604-081,8604-082,48604-083.
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Wiring Wiring, Wiring
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Heat Anticipator Setting a and 10Kw
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Wal? Thermostat/Optional Duct Heater Field Wiring Connections d h
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DATE OF INSTALLATION
PERFORMANCE CHECK
WATER SOURCE HEAT PUMPS
Instalier Please Fill Out
and Retain With Unit
MODEL NO(S). SERIAL NO(S).
ITEM
COOLING
HEATING JOB NUMBER
HEAD PRESSURE
NAME OF INSTALLER
SUCTION PRESSURE
NAME OF OWNER
WATER TEMP. (IN)
ADDRESS
WATER TEMP. (OUT)
CITY STATE
. WATER PRESSURE CIN)
FIELD COMMENTS:
| 6. WATER PRESSURE (OUT)
WATER FLOW (GPM)
AMPERES (BLOWER)
AMPERES (COMPRESSOR)
LINE YOLTAGE
(COMPRESSOR RUNNING)
11.
AIR TEMP. (IN) D.B.
W.B.
12,
AIR TEMP. (OUT) D.B.
N.B.
This PERFORMANCE CHECK SIEET should be filled out by
installer and retained with unit.
27
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