Bard WPV 30, WPV 36, WPV 53, WPV 62, WPVD 30, 36, 53, 62, NPVD 36, 53 heat pump Installation Instructions

 7
MANUAL 2100-048
INSTALLATION INSTRUCTIONS
HIGH EFFICIENCY
WATER SOURCE
PACKAGED HEAT PUMPS
MODELS
WPV30 WPVS3
*WPVD30 *NPVD53
NPV36WPVEZ
*NPVD36 *WPVD62
*Built-in hot water
heat exchanger.
GROUND WATER TEMPERATURES 45-75° F
Lockout Relay rd
Emergency Heat Relay ————
Blower Relay—
Heat Recovery Unit
Pump SwitCh === @ | |
4
C0
| e
ES |
O0
E
A
CONTROL PANEL
JE" nsformer
La Compressor Contactor
High Voltage
Junction Box
CNE
244 Terminal
Board
Pump With
Water Sensor
Thermostat — — ——————
|
Solengid Valyve- ——
|
Reversing Valve
Water Requlating Valve
Capitlary Access Port
High Pressure
Switch——m— _—m.
Low Pressure
Switch |
R-22 Service Part
(Discharge) ———"""T——
[J оне
| Control Panel
(See Above)
>——R.22 Service Port {Suction)
—— Water Out
Water In
=)
lr
(Compressor
900,000
Piping Access
Panel —
{May be installed as shown
or on left ar
of casfng).
Note:
right side
If no return air duct is used, applicable installation codes may limit
this cabinet to installation only in a single story structure.
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GENERAL Design the ductwork according to methods givan by
the National Warm Alr Heating and Air Conditioning
Units are shipped completely assembled and internally Association. When duct runs through unconditioned
wired, requiring only duct connections, thermostat spaces, it should be insulated with a minimum of
wiring, 230-208 volt AC power wiring, and water two inches fiberglass insulation with vapor barrier.
piping. The equipment covered in this manual is to It 15 recommended that flexible connections be used
be installed by trained, experienced service and in- to connect the ductwork to the unit in order to keep
gtallation technicians. Any heat pump is more the noise transmission to a minimum.
critical of proper reírigerant charge and an adequate
duct system than a cooling only air conditioning unit. 4. FILTER
These instructions and any instructions packaged with This unit must not be operated without a filter. It
any separate equipment reguired to make up the entire comes equipped with a disposable filter which should
heat pump system should be carefully read before be- be checked often and replaced if dirty. Insufficient
ginning the installation. Note particularly any tags air flow due to undersized duct systems or dirty
and/or labels attached to the equipment. filters can result in nuisance tripping of the high
Or Low pressure controls. Refer to Table 3 for
While these instructions are intended as a general correct air flow and static pressure requirements.
recommended guide, they do пос in any way supersede See Figure 3.
any national and/or local codes. Authorities having
jurisdiction should be consulted before the instai-
lation is made.
UNPACKING
Upon receipt of the equipment, the carton should be
checked for external signg 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.
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 aystam should be sizad and installed in ac-
cordance with Standards of the National Fire Pro-
tection 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 Canditioning Systems,
NFPA No. 90B.
№,
ca 100 ;
PTT
{
2. SITE SELECTION
The unit may be installed in a basement, closet or
utility room provided adequate service access is FIÈURE 3
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 ar only one
side has the minimum two feet clearance. The unit
dhould be located in the canditioned space to pre-
vent freezing of the water lines and to permit
proper, autcmatic shut off of the water requlating
valves.
5. ELECTRICAL WIRING
Clearance to combustible materials is 0 inches for
the heat pump. If an optional duct heater is in- All electrical connections are made through the tcp
stalled, follow the instructions packed with the Qf the unit. High voltage connections are made
duct heater “or specifications regarding clearance with wire nuts to the factory-provided vigtail leads
to combustible material. in the junction box. Low voltage connections are
made to the terminal strip mounted on the top of
Before setting the unit, consider ease of piping, the unit, Refer to the wiring diagram for con-
drain and electrical connections for the unit, Also, necting the terminals.
for units with heat recovery init, consider the
proximity of the unit =o the water heater or storage a. MAIN POWER
tank. Place the unit on a solid base, preferably
concrete, to minimize undesirable noise and vi- Refer to the unit serial plate for wire sizing
bration. DO NOT elevats the base pan on rubber or information and correct oversurrent protection
cork vibration eliminator pads as this will permit size. Each unit is marked with a "Minimum
the unit base to act like a drum, transmitting ob- Circuit Ampacity.” This means that field
jectionable noise. wiring connectors must be sized to carry that
amount of current. Each unit and/or wiring
3. DUCTWORK diagram is also marked "Use Copper Conductors
Only,” meaning the leads >rovided are not
If the unit is to be installed in a closet or suitable for aluminum wiring. Refer to the
utility room which does not have a floor drain, a National Electric Code for complete current-
secondary drain pan under the entire unit is highly carrying capacity data on the various grades oí
recommended. wiring material,
J0 NOT install the unit in such a way that a direct The unit rating plate lists "Maximum Over-
path exists between any return grills and the unit. current Protective Device” that is to be used
Rather, insure that the air entering the return wich the equipment. This device may be a time
grille will make at least one turn before entering delay fuse or HACR Type circuit breakar. The
the unit air coil. This will reduce possible ob- Correct size overcurrent protective device must
jectionable compressor and air noise from entering be used to provide Ест proper circuit protection
the occupied space. . and to avoid nuisance trips due to the momentary
nigh starting current of the compressor motor.
b. CONTROL CIRCUIT—LOW VOLTAGE W1RING
A 24 volt terminal strip is mounted on top of
the unit. Two types of thermostats are available:
11 Single stage heat, single stage cool to op-
erate the heat pump alona~~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 muat 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 albows
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 tc a sewer main.
The drain line enters the unit through the water
access panel and connects to the PPT 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 con-
nections are made directly to the heat exchanger
coil and are 3/4" or l"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 re-
comended that the píping from 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 bafore the installation is mada. In-
sufficient 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 ls advisable that the complete
watar 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 en-
countered with well water, it is strongly ra-
commended that the water lines connecting the unit
be insulated to prevent water droplets from con~
densing on the pipa surface.
Refar to Piping, Pigqure 4. Slow closing Solenoid
VALVE (6) with a 24V coil provides on/off contrel 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 indi-
cated by the arrow on the side of the valve body.
Following is a table showing which valve is to be
installed with which heat pump.
HEAT PUMP FLOW BARD
MODEL RATE PART NUMBER
WPV30, WPVDIO 4 GPM 9603-010
WPV36, WFVD36 5 GPM 8603-011
WPV53, WPVD53 & GPM 8603-007
WPV62*, WPVD62* 8603-008*
*3 GPM i
*At 50° Entering Water Temperature and above.
*For units operating below 50° water temperature
install (2) 8 GPM constant £low valves (9603-0039)
in parallel.
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 cut water lines to permit iso-
lation of the unit from the plumbing system should
future service work require this. Globe valves
should not be used as shutoff valves beacause of the
excessive pressure drop inherent in the valve de-
sign. Instead use gate or ball valves as shut-offs
so ав to minimize pressure drop.
Drain cocks (8) and (10), and tees have been in-
cluded to permit acid cleaning the refrigerant-to-
water coil should such cleaning be required. See
WATER CORROSIÓN.
Drain Cocks (12) provides accesa to the system to
check water flow through the constant flow valve
to insure adequate water flow through the unit. A
water meter 1-10 GPM (8603-013) is used to check
the water flow rate. See photo below.
PHOTO NO. 1
3. WELL PUMP SIZING
Strictly speaking, sizing the well pump is the re-
sponsibility of the well drilling contractor. It
is important, however, that the HVAC 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 in-
adequate 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 failure.
The well pump must be capable of supplying enough
water and at an adeguate pressure to meet competing
demands of water fixtures. The well pump must be
sized in such a way that three requirements are met:
Adequate flow rate in GPM.
2. Adequate pressure at the
fixture.
3. Able to meet the above from
the depth of the well-feet
cf lift.
The pressure requirements put on the pump are di-
rectly affected by the diameter of pipe being used
as well as by the water flow rate through the pipe.
The worksheet included in Manual 2100-072 should
guarantee that the well pump has enough capacity.
It should also ensure that the piping is not under-
sized which would create too much pressure due to
friction loss. High pressure losses due to under-
sized pipe will reduce efficiency and require
larger pumps and could also create water noise
problems.
SEQUENCE OF OPERATICN
1. COOLING WITH OR WITHOUT DUCT HEATERS
Whenever the system lever is moved to COOL, thermo-
stat system switch completes a circuit R to O, ener-
gizing the reversing valve solencid, On a call for
cooling, the cooling bulb completes a circuit from
R co G, energizing the Llower relay coil. The
bicwer relay contacts complete a 230 volt circuit to
the blower motor and the blower cperates. R to У
circuit is completed ar the same “ime as thes fan
circuit and current flows from Y to terminal 4 at
the lockout relay. Terminal 4 of the lockout
relay provides two paths for current flow,
FIGURE 4
1. Through the lockout relay coil which offers
the resistance of the lockout relay coil,
д. Through the normally closed contacts of tae
lockout relay to terminal 5 of the lockout
relay and then through the high and low
pressure switches to the compressor contacter
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 dis-
charge (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
coll, energizing the lockout relay coil and opening
terminals 4 and 5 of the lockout relay. The lock-
out 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 terminals 4 and 5 to make.
When the high (low) pressure switch closes, a
circuit is completed to L at the thermostat, ener-
gizing 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 Ч 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 ener-
glzed,
3. TWO STAGE HEAT WITH DUCT HEATERS
First stage heat is the same as single stage heating
without duct heater. When the second stage thermo-
stat bulb makes, a circuit is completed from R to
W2 and W3, energizing the duct heater heat ccn-
tactor, Rl, through the automatic thermal cutout
{TCO}. The contacts of Rl close a circuit to the
heat pump blower relay and, thrcugh the manual re-
set thermal cut-off device, to the elements. Elements
and blower remain energized as long as R to W2 and
W3 are made.
4, EMERGENCY HEAT
When the system switch is moved to EMER, the com-
pressor cirguit R to ¥ is disconnected. Control of
the electric heaters is from R toa W2 and Wi through
the thermostat second stage heating bulb. Blower
operation is controlled by the second stage heating
bulb. Cperation is the same as above, "Two Stage
Heat With Duct Heaters,"
SYSTEM START UP PROCEDURE
l. Be sure main power to the unit is OFF at the
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
3ixty minutes per pound of refrigerant. This
allows the crankcase heater to drive any re-
frigerant liquid aut of the compressor sump.
This procedure should be followed whenever the
power has been off for twelve hours or longer.
Except as required for safety while servicing
DO NOT OPEN THE UNIT DISCONNECT SWITCH.
4. Check system air flow for obstructions.
al Move thermostat fan switch to ON.
Blowar runs.
E) Be sure all registers and grilles
are open.
с) Move thermostat fan switch to AUTO.
Blower should stop.
5. Fully open the manual iniet and outlet valves,
6. Check water flow. (See Photo 1)
a} Connect a water flow meter ko the drain
cock (12, Pig. 4) between the constant
low чате and the solenoid valve. Run a
hose from the flow meter to a drain or
sink. “pen tae drain cock.
db) Check the water flow rate through constant
flow valve to be sure it is the same as
*he "nit is rated for.
(Example: 4 GPM for a WPV3J0!
с} When water £low is nkay, closé drain cock
and remove the water flow meter. The unit
is now ready to scart.
7, Start the unit in cooling moda. /1\ By moving
the thermostat switch to cool, fan should bea
set for AUTO.
a) Check to see the solenoid valve opened,
8. Check the system refrigerant pressures against
the cooling refrigerant pressure curve in the
Installation Manual for rated water flow and
entering water temperatures. IZ the refrigerant
pressures do not match, check for air flow
problem then refrigeration system problem.
9. Switch the unit to the heating mode. /1\ By
moving the thermostat switch to heat, ran
should be set for AUTO,
al Check “o see «he solencid valve opened
again.
10. Check the refrigerant system pressures against
the heating refrigerant pressure curve in In-
stallation 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):
al Check for possible refrigerant leaks.
b> Discharge all remaining refrigerant from
unit.
c) Evacuate unit down to 29 inches of vacuum.
d} Recharge the unit with refrigerant by
weight. This is the only way to insure a
proper charge in cap tube svstem.
A For models with domestic hot water heat
exchanger, be sure the water pump switch
ig cif wnile checking refrigerant system.
UNIT WITH HEAT RECOVERY FOR HEATING
DOMESTIC HQT WATER -- WPVD SERIES
GENERAL
Units having a heat recovery coil should only be in- uu
stalled by trained refrigeration technicians. These
instructions serve as a guide to the technician in-
stalling the heat recovery portion of the unit, They
are not intended as a step-by-step procedure with
which the mechanically inclined owner can install
the unit.
DESCRIPTION
Units with the heat recovery coil mounted at the
factory are designed to recover the "waste" heat
from the compressor discharge gas and use this
“vaste” feat to neat domestic hot water. Units so
equipred may be identified Бу the letter “D" in the
model number. In addition to the components alreadv
described for the heat pump, these units are equippeé
with an additional water-to-rerrigerant coil, а
circulating pump and a thermostat to control the
operation of the circulating pump. The water-to-
refrigerant coil ias constructed of two tubes. Waser
flows through the center tube, refrigerant flows
through a surrounding tube, totally separated from
the water tube. The space between these two tubes is
vented tc atmospnere, In the unlikely event a leak
should develop, no leakage can cccur between the
water and the refrigerant.
INSTALLATION
L. TWO TANK. In order to realize the maximum
energy savings from the domestic hot water heat re-
covery unit, it ia recommended that a second water
storage tank be installed in addition to the main
hot water heater. Fossil fuel fired water heaters
must be a two tank instaliation. If the existing
water heater is electric, the two tank installaticn
is still the best approach, however, a one tank in-
stallaction is satisfactcry. Tanks specifically in-
tended for hot water storage are available from uu
water heater manufacturers (solar hot water storage
tanks). These tanks have special dip tube arrange-
ments, are built without heaters and are constructed
with heavier insulation. However, a well insulated
electric water heatar without the electric heating
elements connected will also make a suitable storage
tank.
The size of this tank should be as large as space
and economy permit but in no event should it be
less than one-half of the daily water requirements
for the occupants. As a guide in estimating the
daily family water requirements, the Department of
Energy recommends a figure of 16.07 gallons of het
water per day per individual, For example, a family
of four would require €4.3 gallons per day
(4 x 16,07).
2. ONE TANK. Where space or first Cost economy
dictates only one hot water heater, a single tank
installation Is permissible. It should be ncted,
however, that the amount of savings realized 15
reduced.
The single hot water tank may be a new hot water
heater (sized in this case to 100% of daily water
requirements} or the existing water heater in the
case of a retrofit installation. The existing het
water heater should be carefully inspected and any
sediment removed by draining the water heater and
flushing it until all loose sediment has been
flushed away. This sediment, besides cutting ¿own
on the efficiency of the water heater and heat re-
covery unit, could damagé the circulating pump, or
clog the strainer and stop water flow,
Чан шее — -—— же.
NOTE:
Hot Water
To House
DO NOT OPERATE WATER PUMP
WITHOUT WATER LINES CONNECTED AND
WATER IN SYSTEM WITH SHUT OFF VALVES
— — — —=
Cold
Water
In
| Check Valve
Pressure Relief , (Optional)
Valve
A Insulate Plugged Tees
р
Shut Off
Valves
Water Pump
Thermostat
Water Pump
(See Note)
Pa
OPEN! TURN PUMP SWITCH TO OFF.
|”!
Existing Solengid
ar Main Valve
Water
Heater X
Strainer
Heat
Drain Recavery
Coil
TYPICAL "WEVD" MODEL
ANE TANK INSTALLATION
(PERMISSIBLE) Figure 8
Optional Cold
Bypass Water In
Loop
High Pressure а Check Valve
Relief valve ra (Optional)
Plugged Tees
Insulate
Hot Water =
To House Shut Off
Valves
———— È
tol] i !
I | |
Out || LA <
| |
| я | b
| | ; | -
| | ; A Water Pump
! | | i cer na
| || | | |
|! | - 7 |
| | | |
|! E |
|| | water |
| TN
. (se >
. * Note) —TSolenoid
Existing | Additional Hot -— ' Valve
Water Heater water Storage
LP, Gas, Oil, Tank. Not
Electric electrically Sträiner
A connected - 590
NS Drain Heat 900
| Recovery
Coil
NOTE: DO NOT OPERATE WATER PUMP | J
TTHOUT WATER LINES CONNECTED AND — /
AATER [N SYSTEM WITH SHUT OFF VALVES
OPEN! TURN PUMP SWITCH TO OFF,
TYOTCAL “HPVD" MODEL
TWO TANK INSTALLATION
(PREFERRED) Figure 7
7
LOCATION
In determining the location of the storage tank (znd
the water heater] keep in mind that small temperature
differences between the storage tank water tempera-
ture and the refrigerant temperature permit this unit
ro funetien. It 1s consequently necessary that all
tubing be kept as short and direct as possible and
that the “ubing he adegua+zly and thoroughly insu-
lated.
Locate the storage tank as close tc the heat pump
and water heater as the installation permits. Ве
sure to provide adequate service access to all com-
penents.
INSTALLATION PROCEDURE - GENERAL
1. Turn off the water heater electric power (if
electric hot wacer heater} or close the fuel supply
line {if fossil fuel water heater).
2. Turn off the electr
source neat pump.
ic power to the water
3, Shut ofi the main water supply line bv clos-
ing the water valve at the well pressure tank (11 а
well system) or the water meter (if city water is
being used for domestic purposes).
4. Connect a garden hose to the water heater
drain valve (bottom of the water heater tank) and
drain the water heater to a floor drain or other
convenient drain.
5. If the water heater has been in service for
some time, inspect it for sediment. Remove all
sadiment and thorcughly flush the water heater tank.
WATER PIPING
Two tank instailation, refer to Piping Diadram,
Tig. 7 and steps 1 to 3, and Two Tank installation
instructions. One tank installation, refer to
Piping Tiagram, Fig. 8 and steps 1 to 3 and One
Tank installation instructions. Follow all local
plumbing codes, Piping connections are 1,2 inch O.D.
copper Tipe, Type К or L, and are made inside %h
unit. Zoute the copper through the tcp of the heat
Pp hrough the fNoles provided.
1. A plugged te=2 and snut off valve should be
provided near the neat pump unit. This will make it
easy if iz aver becomes necessary to clear tne de-
superheater coil. A suicabie cleaner is mentioned
below, "Water Corrosion” section. The shut off
valves will Isolate the unit from the rest of the
plumbing and the plugged tees will provide access
to the coil and pump “or the cleaner.
2. A strainer is included in both figures to
collect ary sediment which may accumulate in the
storage tank or water heater. This strainer should
be of the zlg2anable "У" type. It is more important
thac the s-rainer be included on one tank rerrofit
installation where the Not water heater may be
Susbected of sedimentation.
2. A check valve is shown in Both figures as an
option. The purpose of the check vaive is to pre-
vent any zontaminaticn of the water svstem in the
Unlixely avant that the heat exchanger develops a
Резак, Check the local plumbing code as this check
valve may he required.
THO TANK INSTALLATION - FIGURE 7
1. Water into the heat recovery unit is taken
from the bottom of the storage tank. This location
will lasure that the coldest water will always be
circulated to the recovery unit.
2. If a solar type watar storage tank is being
uged {specifically designad for storinc but not
heating water), insert the dip tubes according to
the manufacturer's instructions.
3. If a second water heater is being used for
storage, install a pipe thread tee and a suitably
sized oipe nipple in he water heater irain con-
necticn íbcttem of <he tank). The run 2f the tea
13 connected between the water neatar and a drain
va-ve. Brass or bronze fittings ars recommended
for these fittings. Theck the local plumbing code—
brass or bronze may be required. The branch of the
tee is connected to the recovery unit "water in"
copper tube. Use a plpe thread to sweat adapter to
connect the tubing between the tee and
4. The "water cut" tubing from the recove-v unit
recovery unit.
is connected through a tee бо сое storage “2nX and to =
the normal "water in" of -he main water heater.
5, Cold water inco the storage tank is connected
to the "water in" of the storage tank.
6, An optional bypass locp with valve is shown
in Fig. 7 between the water into the storage tank
and the "water out" of the storage tank. The lcop
will make future service work easier should it be-
come necessary to drain the storage tank. In
normal operation the valve in =he bypass loop should
be closed.
ONE TANK INSTALLATION — FIGURE
NOT RECOMMENDED FOR FOSSIL FUEL FIRED WATER HEATER
1. Unless the single hot water heater is new, 1%
should be thoroughly inspected and cleaned of sedi-
ment. Flush the tank several times and inspect it
after sach flushing. Be sure the tank is Tree of
sedimentation.
2, Water from the hot water heater 15 connected
to the domestic hot water supply as any conventional
hot water heater would be connected,
1, Water to the heat recovery unit is connected
through a tee at the drain valve connection of the
hot water heater as described in step 3 above.
4, Water from “he recovery unit is connected at
the "water in" connection of the hot water heater
through a tee.
OPERATION OF THE HEAT RECOVERY UNIT
The circulating pump and soleneid valve ara wired in
parallel with the heat pump compressor (230 VAC
circuit). Thus, по water can be circulatad =o “he
water-ro-refrigerant coil unless the compressor is
in operation,
In addition, a thermostat, attached to ths sniaring
water tube of the pump, is Wired in series wisn the
pump motor and solenoid valve. The thermostat 15
normally closed and cpens when the tuke temperature
reaches 130°F. This will stop further heating of
the water by the recovery unit and is intended to
prevent overheating the water. The thermostat wiil
reset at approximately 120°F.
Heat for domestic hot water is obtained from the
discharge gas of tie compressor. This heat would
ordinarily be rejected to the ground water in the
cooling mode or to the room air in the heazing mode.
With che recovery Unit this heat is transferred to
the storage tank ог water heater.
START UP AND CHECK CUT
1. Se sure all snut off valves are open. If
optional bypass valve, see Fig. 7, has been in-
stalled, this valve should be closed.
2. Open a hot water Éaucet to permit any air =o
Eleed from the plumbing.
3. Turn off the heat pump disconnect.
4. Temporarily remove compressor wira from luac
side of contacter and insulate.
5. Turn neat cump disconnect CH.
6. Set the wall thermostat to cool.
7. Inspect for water leaks anc verify pump is
operating.
8. Again turn off the heat pump discennect,
9. Re-install compressor wire con compresser
contactor terminal,
A
dl
START UP AND CHECK CUT (Cont)
10. Repeat steps 5 and 6. Feel the "water in"
and "water out" tubes. There should be a noticeable
temperature difference. How much temperature differ-
ence you measure will depend upon tubing length, flow
rate, storage tank temperature and could vary from
2°F to 20°F.
11. Move thermostat system to CFF. Verify that
water pump stops.
WATER CORROSION
Two concerns will immediately come to light when con-
gidering 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 guantity is an important consideration and cne
which is easily determined. The well driller must per-
form a pump down test on the well according to methods
described by the National Well Water Asgoctation. This test,
If performed correctly, will provide information on
the rate of flow 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 reguired to run for ex-
tended periods of time.
The second concern, about water quality, is equally
important. Generally speaking, if the water ia 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:
l. 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 assoc-
iated with ground water. These ara:
(1) Biological growth. This is the growth of mic-
roscoplc 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)
ог galvanic reaction between dlassimilar metals in
the presence of water. By using plastic plumbing or
di-electric unions galvanic reaction is eliminated.
The use of corrosion resistant materials (such as
the Cupro Nickel coil) throughout the watar system
wlll reduce corrosion problems significantly.
(4) Scale formation. Of all 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 sulfate may also be present, Carbon dioxide
gas (CO2), the carbonate of calcium and magnesium
carbonate, is very soluble in water. It will re-
main 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 watsr 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.
REMEDIES OF WATER PROBLEMS
WATER TREATMENT. Water treatment can usually be
economically justified for closed loop systems.
However, because of the large amounts of water in-
volved with a ground water heat pump, water treat-
ment 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 mixing, use, etc. Refer to the
"Cleaning Water Coil", Fig. 9. The acíd solution
can be introduced into the heat pump coil through
the hose bib (Part 8 of Fig. 9). Be sure the
isolation valves (Parts 3 and ll of Fig. 9) 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, Fig. 9) and
returned to the bucket through the other hose bib
(Part 10, Fig. 9). 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.
BUCKET OF
ACID SOLUTION
{See Text)
Figure 9
TABLE 5
HATER COIL PRESSURE DROP
MODEL | WPV30 | WPV36 WeVS3 | weve?
WPVD30 | WPVD36 | WPVD53 | WPVD62
> GPM PSIG PSIG PSIG PSIG
TL
4 2.0 1.9 В --
5 2.0 2.0 +. __
| 6 4.2 2.4 2.5 2.5
А 7 5.7 2.0 3.2 3.5
8 7.5 3,3 4.0 4.5
9 9.5 5.5 5.2 5.6
10 12.0 7.6 6.5 6.7
Ll 14.8 10.4 7.7 3.0
12 17.6 15.3 9.0 9.3
13 20.2 20.6 10.5 10.7
14 -- u. 12.0 12.3
15 _— -— 13.9 15.5
L6 -- -- 15.8 18.3
и” Мах .
TABLE 1
ACCESSORY ITEMS = DUCT HEATER
MINIMUM | WIRE SIZE ÁN MAX. DIMENSIONS
PART NO. | 2H | VOLTS | KW | ona To FUSE
Cu Al HEA wW 1868 с
3501-067 ı] 242 3.3 25 $10 48 25 afi12!17| 6
. _ | TABLE 6
2604-768 11 249 | 3.6 50 + 6 +4 50 8 | 16 117} 6 -
3504-069 A 1] 240 [15.0 79 à 3 1 ao | 12 {18 | 27 | 12 WATER COIL RATED FLOW
a604-070/A) 1) 240 | ¡9.2 100 41 40 100 12 | 18127 | 12 MODEL PM
AN, Use wire suitable for zt least 90°C. WPYIO
= 4
¿21 Fused units (over 48 amperes). WPVD3Q
WPVI6
WEVD3I6
A
TABLE 2 WPV5 3 ç
INDOCR BLOWER PERFORMANCE WPVD53
СЕМ — DRY COIL WITH FILTER WPV62 34
WPV53, WPVD53 WPVS3, WPVDS3 APVDE 2
ans WPV30, WFVD10 ’ ; ’ ,
MODEL HEVI6, WPYDI6 WPV62, WPVD62 WPV62, WPVD62 At 50° water and above
With Optional Without Optional 16 GPM below 50° water.
NAS Installed TW45 Installed
E IN. High Medium Low High Medium Low High Medium
0 1400 1270 1210 1920 1780 1606 | 1920 1750
.10 1345 1230 1170 1880 1750 1580 | 1880 1710
‚20 1230 180 1130 1930 1720 1550 | 1830 1670
„30 1210 1110 1090 1810 1680 1540 | 1750 1630
40 1130 1070 1040 1750 1630 1500 | 1760 1570
„50 1050 1000 380 1650 1570 1440 | 1610 1520
„50 370 890 900 1320 1500 1400 | 1550 1450
TARLE 3
TABLE 4
RATED RECOMMENDED и -
MODEL CFM | AIR FLOW RANGE-—CFM SEN. DVAILABLE § FLOW RATE
PART NO. | PRESSURE PSIG GEM
“PVIO
wPDIO | 1000 900 - 1030 9603-007 15 A 6
WPV36 1200 1070 - 1345 8603-0038 15 A 8
WPUD 36
8603-010 15 A 4
WEVSI , _
oan 1550 1499 - 1760 3603-011 15 A 5
NPVE2 ÁN Th drop through th
; 1790 1530 _ 1330 e Pressure тор = TOUG che
NFYVD62 constant {low valve will vary de-
sending nn the available pragsure
ahead of the valve. Unless a
minimum of 13 psig 1s available
immediately ahead of the valve no
water will flow.
10
MODEL WPV30, WPVD30 @ 4 GPM
6/83
400
These curves are based upon 80°DB, 67°WB R.A.Temp. and
Rated CFM (airflow) for cooling and 70°DB for heating
and should be used for reference purposes only. If there
is any doubt as to correct operating charge being in the
system, the charge should be removed, system evacuated,
and recharged according to serial plate instructions.
380
36
wt
mM
o o o с < o o
y < со vo «+ С o
с”) en Са Са Са Са J —
HIGH SIDE (DISCHARGE LINE) PRESSURE -- PSIG
80
160
NOTE: On units with heat recovery coil
(WPVD) turn water pump switch to "off"
before measuring refrigerant pressures.
LOW SIDE PRESSURE--PSIG
(SUCTION LINE)
00
9
o Fs vo un
140
120
40
50 60 70 80 9% 100 110
WATER TEMPERATURE ENTERING WATER COIL--DEGREE F.
40
11A
6/83
MODEL WPV36, WPVD36 @ 5 GPM
) )
These curves are based upon 80°DB, 67°WB R.A.Temp. and
Rated CFM (airflow) for cooling and 70°DB for heating
and should be used for reference purposes only. If there
is any doubt as to correct operating charge being in the
system, the charge should be removed, system evacuated,
and recharged according to serial plate instructions.
NOTE: On units with heal recovery .)
(WPVD) turn water pump switch to "off"
before measuring refrigerant pressures.
LOW SIDE PRESSURE--PSIG
(SUCTION LINE)
< < o oO Oo o
o < co ~~ Wo Ly
40
400
© o D o o o o o o O
со D <+ с) o co D + a o со
С° en en {> с ev со с od od т
HIGH SIDE (DISCHARGE LINE) PRESSURE -- PSIG
160
140
120
50 60 70 80 90 100 110
40
WATER TEMPERATURE ENTERING WATER COIL--DEGREE F.
11B
6/83
MODELS WPV62, WPVD62 @ 8 GPM
These curves are based upon 80°DB, 67°WB R.A.Temp. and
Rated CFM (airflow) for cooling and 70°DB for heating
and should be used for reference purposes only. If there
ts any doubt as to correct operating charge being in the
system, the charge should be removed, system evacuated,
and recharged according to serial plate instructions.
a=
Brus
44 +
NH
a]:
Ti A
1%:
q
Tes Td:
Y: SEÑA:
dés
it
H
GH SIDE (DISCHARGE LIN
gig Lo
Hapa med
n n Ei +
Sin dti
Hn ML ++
id Ча
E) PRESSURE -
ds
Pu
ey
ое
I am
PSIG
NOTE: On units with heat recovery coil (WpPYD)
turn water pump switch to "off" before measuring
refrigerant pressures.
LOW SIDE PRESSURE--PSIG
{SUCTION LINE}
< с со rs vo un +
50 60 70 80 90 100 110
40
WATER TEMPERATURE ENTERING WATER COIL--DEGREE F.
12A
6/83
MODELS WPV53, WPVD53 @ 6 GPM
) )
These curves are based upon 80°DB, 67°WB R.A.Temp. and
Rated CFM (airflow) for cooling and 70°DB for heating
and should be used for reference purposes only. If there
is any doubt as to correct operating charge being in the
system, the charge should be removed, system evacuated,
and recharged according to serial plate instructions.
NOTE: On units with heat recovery coil
(WPYD) turn water pump switch to "off"
before measuring refrigerant pressures,
LOW SIDE PRESSURE--PSIG
(SUCTION LINE)
00
0
0
0
O" co fr W um
40
400
с < < o o o o o o oO oO
CO WO «+ cy oO CO ‘О «+ oJ < со
с) m с”) co” co cu od cu Cu Со —
HIGH SIDE (DISCHARGE LINE) PRESSURE -- PSIG
160
140
120
50 60 70 80 90 100 110
WATER TEMPERATURE ENTERING WATER COIL--DEGREE F.
40
12B
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-18-
PERFORMANCE CHECK
WATER SOURCE HEAT PUMPS
INSTALLER PLEASE FILL OUT AND
DATE OF INSTALLATION
RETAIN WITH UNIT
MODEL NO(S).
SERIAL NO(S).
ITEM
COOLING HEATING § JOB NUMBER
1. HEAD PRESSURE
NAME OF INSTALLER
2. SUCTION PRESSURE
NAME OF OWNER
3. WATER TEMP.(IN)
ADDRESS
4. WATER TEMP. (OUT)
i CITY
STATE
5. WATER PRESSURE (IN)
6. WATER PRESSURE (OUT)
FIELD COMMENTS :
7. WATER FLOW (GPM)
8. AMPERES (BLOWER)
9. AMPERES (COMPRESSOR)
10. LINE VOLTAGE
(COMPRESSOR RUNNING)
11. AIR TEMP.(IN) D.B.
W.B.
12. AIR TEMP.(OUT) D.B.
W.B.
13. DESUPERHEATER H,0
TEMP. (IN)
14, DESUPERHEATER H,0
*° TEMP. (OUT)
This PERFORMANCE CHECK SHEET should be
filled out by installer and retained with unit.
19
SINCE / 1914
DATE OF INSTALLATION
PERFORMANCE CHECK INSTALLER
WATER SOURCE HEAT PUMPS PLEASE FILL OUT
AND RETURN TO
BARD MANUFACTURING CO,
Please fill out as much of the below information as you can.
This information is needed by our Service Department to better
assist you in the event of possible future service needs.
MODEL NO(S). SERIAL NO{S).
ITEM
COOLING | HEATING | JOB NUMBER
HEAD PRESSURE
| NAME OF INSTALLER
2. SUCTION PRESSURE | NAME OF OWNER
3. WATER TEMP.{IN) ADDRESS
4. WATER TEMP. (OUT) CITY STATE
5. WATER PRESSURE (IN)
6. WATER PRESSURE (OUT) | FIELD COMMENTS:
7. MATER FLOW (GPM)
8. AMPERES (BLOWER)
9. AMPERES (COMPRESSOR)
10. LINE VOLTAGE
(COMPRESSOR RUNNING)
11. AIR TEMP.(IN) D.B.
W.B.
12. AIR TEMP.(OUT) D.B.
W.B.
13. DESUPERHEATER H,0
TEMP. (IN)
14. a
DESUPERHEATER H,0
TEMP. (OUT)
This PERFORMANCE CHECK SHEET should be
filled out by installer and returned to:
Bard Manufacturing Company
P.O. Box 607
Bryan, Ohio 43506
20
270795 ~~
2a8Y D704
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PLACE
STAMP
HERE
BARD MANUFACTURING COMPANY
P. O. Box 607 -
BRYAN, OHIO 43506
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