Document
 MANUAL 2100-08)
INSTALLATION INSTRUCTIONS
MODELS
HWP30
HWPD30"
HWP36
HWPD36"
*Built-in hot water heat exchanger.
HIGH EFFICIENCY
WATER SOURCE
HORIZONTAL PACKAGED HEAT PUMPS
WATER TEMPERATURES: 25 to 105°F
PUMP SWITCH
TRANSFORMER LOCK OUT LOW VOLTAGE
( POWER
ENTRY вх RELAY 7 ENTRY
q | y LOW VOLTAGE
= + tre TERMINAL STRIP
© ® С
COMPRESSOR bé Sac
CONTACTOR — ry
| ANAS SR
QQ y
— Sw
e— e so
NS V0 Sa wz
oF e ОФ из
DPE
ee roy
S| L
— À EN
AN \__ BLOWER TT
HEAT RECOVERY RELAY EMERGENCY HEAT RELAY
CONTROL PANEL
BLOWER ACCES
PANEL —
BLOWER MOUNTINC PANEL
аж
=
re
BLOWER
e BLOWER ACCESS PANEL
4
ui
de |
SOLENOID VALVE ——
WATER PUMP -———
HEAT RECOVERY COIL
REVERSING VALVE
LOW PRESSURE SWITCH
ia)
WATER SENSOR
| THERMOSTAT
em" WATER COIL
—_— RETURN AIR PANEL
(Can be moved to opposite side)
i— COMPRESSOR
THERMOSTATIC EXPANSION
VALVE
WATER REGULATING VALVE
CAPILLARY ACCESS PORT
CONTROL PANEL
(See Above)
LD
HIGH PRESSURE SWITC
TOP VIEW
Su R-22 SERVICE PORT (SUCTION)
R-22 SERVICE PORT (DISCHARGE)
NOTE: If no return air duct is used,
applicable installation codes may limit
this cabinet to installation only in a
single story structure.
TO WATER HEATER
FROM WATER HEATER
WATER CUT
WATER IN
=
IT
Г
END VIEW
—1-
WATER SOURCE HEAT PUMP
Thermostatic
COOLING CYCLE Valve
Suction Service Port
Compressor
Discharge
Line
—
Reversing
Valve |
Discharge
Service
Port
Water Out
Bi-Directional
Thermostatic
Expansion Valve
Water In
Strainer
External
Equalizer
Tube
[| High Pressure Vapor
ZA Low Pressure Vapor
E -— Low Pressure Liquid
J High Pressure Liquid
=
NN
N_N TI NN
Air Flow
WATER SOURCE HEAT PUMP +
1 bd
HEATING CYCLE Thermostatic Vapor Indoor
- Expansion Valve Line / Coil
ulb 5 Capillary y — ~
(—— =
ST
“4 A CAN A a ES 7
Suction Service Port Y
J External
Й Equalizer
-— Compressor „и Tube
|
| Discharge d
| | J Line
7) Reversing й | High Pressure Vapor
Ш Valve | A
— / ZA Low Pressure Vapor
—— |
7 | Low Pressure Liquid
— NN Discharge 1 ==
SES Service
< q Port BR High Pressure Liquid
— Water Out
Bi-Directional
Thermostatic
Expansion Valve
: á = Water In
hy
we a a mm em a ae
TONE TE ся
- =
Strainer
—2-
GENERAL
Units are shipped completely assembled and internaily wired,
requiring only duct connections, thermostat wiring, 230-208
voit 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 euipment 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
guide, 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.
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,
2. SITE SELECTION
The unit may be installed in a basement, crawispace or attic
provided adequate service access is insured, The unit should
be located in the conditioned space to prevent freezing of the
water lines,
Clearance to combustible materials is 0 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 material.
Before setting the unit, consider ease of piping, drain and
electrical connections for the unit. Also, for units with heat
recovery unit, consider the proximity of the unit to the water
heater or storage tank.
3. SUPPLY AND RETURN DUCT LOCATIONS ON UNIT
Refer to Figure 3, The units supply and return air
connections can be arranged in six different configurations.
To change from left-hand return (shipping mode) to
right-hand return, remove the return air panel, turn the
panel around and install it on the opposite side of the unit
over the return air opening. Install optional filter rack or
duct work using the holes provided. To change the direction
of blower discharge, remove the blower access paneis. Remove
the bolt holding the blower assembly, lift blower out of the
bottom offset. Remove the blower discharge panel {panel with
air opening and pienum flanges) and instail it into either the
left-hand or right-hand opening. Repiace blower into its new
position by inserting blower bottom fiange into the bottom
offset and aligning upper flange bolt hole with the hale
provided and tightening the boit. Replace biower access
рапе!з. Place the unit on a solid base to minimize undesirable
noise and vibration. DO NOT elevate the base pan on rubber
ar cork vibration eliminator pads as this will permit the unit
base to act like a drum, transmitting objectionable noise,
30А, and Residence Type Warm Air Heating and Air
Conditioning Systems, NFPA No. 90B.
Service Area
Service Area Service Area
+ + Service nm [> .
. “— — |. ; Blower 5 Service -——
SO Blower! Service Area | EI Area Bl ower >
+= ee a
| с Носта
„>> - Lm
Y “+ Minimum clear e >
space service
ares required
7
Service Area
Service Area Service Âres
/s\ Sarvice Area
| ‚ Blower . | Blower
IE . == | a |
Service | | Service gl ower! Service Service | | Service
L__ Area m= | Area Area ee Area
—, = | a ke ke en | Tr Tem се —=,
Ч о — — — — haa — — | о = — — = С
Te
DSP — a —
+” > и “= и ^^
Unit
Shipped
This
Way
Service Area
<5 Jsuppiy air from unit.
<C return air from unit.
Service Area
FIGURE 3
-3-
Service Araa
>
+ 1
DUCTWORK The unit rating plate lists "maximum Overcurrent
Protective Device" that is to be used with 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 to the
momentary high starting current of the compressor motor,
Ц.
If the unit is to be installed in a crawlspace or attic, a
secondary drain pan, with overflow drain connection, 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
turn before entering the unit air coil, This will reduce
possibie objectionable compressor and air noise from entering
the occupied space.
b. CONTROL CIRCUIT--LOW VOLTACE WIRING
A 24 volt terminal strip is mounted in the control panel,
Two types of thermostats are availabie: 1) Singie stage
heat, single stage cool to operate 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 controi. 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 valtage terminals,
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 a minimum of two inches fiberglass insulation
with vapor barrier. |t is recommended that flexible connections
be used to connect the ductwork to the unit in order to keep
the noise transmission to a minimum.
5, FILTER [Filter Rack Optional)
This unit must not be operated without a filter or filter
grilles, Optional filter rack with a disposable filter 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 controls. Refer
to Table 3 for correct air flow and static pressure -
requirements, See Figure 4 for optional filter rack assembly 7. CONDENSATE DRAIN
and installation, Determine where the drain lime will run. This drain line
contains cold water and must be insulated to avoid drops of
water from dropping on ceiling, etc. A trap must he
installed in the primary drain line,
6. ELECTRICAL WIRING
All electrical connections are made through the side of the
unit, High voltage connections are made to the compressor
contactor. Low voltage connections are made to the terminal
strip mounted in the control panel. Refer to the wiring
diagram for connecting the terminals,
For installations with auxiliary drain pan, a separate drain
line should be run from the auxiliary drain pan and
teriminated where the homeowner can see it. Be certain to
show the homeowner the location of the drain line and to
explain its purpose. In the event of overflow of primary
drain, water will collect in auxiliary pan and run out
through the auxiliary drain line.
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 çurrent—carrying capacity data
on the various grades of wiring material,
lt is not recommended that any condensate drain lines be
connected to a sewer main. Drain lines must be installed in
accordance with local codes.
OPTIONAL FILTER RACK
(FR17)
FILTER RACK CAN dE >
INSTALLED ON THIS SIDE \ =
77 >
ALICN FILTER RACK >
MOUNTING FLANGE WITH y
HOLES IN THIS PANEL |
—
h
— e A
at
FIGURE 4
8, PIPING ACCESS TO THE UNIT
Water piping to and from the unit enters the unit casing
through the water access panei. Piping connections are made
to [angths of 1" hose which connect to the heat exchanger.
9%. WATER CONNECTIONS
it is very important that an adequate supply of clean
non-corrosive weter at the proper pressure be provided before
the installation is made. Insufficient water, in the heating
mode for exampie, 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 compiete 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 ba
insulated to prevent water droplets from condensing on the
pipe surface.
Refer to Piping, Figure 5. Siow closing Solencid 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
vaive solenoid coil.
Constant Flow Valve {7} provides correct flow of water to the
unit regardless of variations in water pressure. Observa 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
instailed with which heat pump,
HEAT PUMP FLOW PART
MODEL RATE NUMBER
HWPD 30 3 GPM 8603-010
PROS 5 GPM 8603-011
Strainer {5) installed upstream of constant flow valve {7} to
coliect foreign material which would clog the flow valve orifice,
The figure shows the use of shutoff valves (5) 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.
, Globe valves shouid not be used as shutoff vaives because of
the excessive pressure drop inherent in the valve design.
Instead use gate or ball valves as shutoffs so as to minimize
pressure drop,
Drain Cocks (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
ow through the constant flow valve to insure adequate water
flow through the unit. A water meter 1-10 GPM (3603-013) is
used to check tha water flow rate. Ses photo #1.
10. WELL PUMP SIZING
Strictly speaking, sizing the well pump is the responsibility 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. Rute 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 tha heat pump--NO
HEAT /NO COOL calls will result. Oversized pumps will short
cycle and could cause prematura pump motor or switch failure.
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 met:
1. Adequate flow rata in GPM.
г. Adequate pressures 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 guarantee that the well
pump has enough capacity. It should also ensure that the
piping is not undersized which would create too much
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,
11. POND INSTALLATIONS
When pond water is used as the water supply and heat sink
for these units, the following is recommended:
a. The pond must be large enough to ensure a
minimum entering water temperature of 37°F for
the unit to operate in the heating mode.
b. The pond must be large enough to ensure a
maximum entering water temperature of 105°F for
the unit to operate in the cooling mode.
с. A water flow rate of
required for all models.
12 GPM or greater is
d. Place inlet and outlet pipes far enough apart from
each other to prevent thermal interference
between the supply and return water.
8. “Screen over intake and discharge pipes,
f. Intake water shouid be below the 15 foot level in
the pond.
PHOTO NO, 1
Measuring typical water flow through a
water source heat pump using a water flow
meter (8603-013) to ensure proper water
— 5 flow through unit.
SEQUENCE OF OPERATION
1. COOLING WITH OR WITHOUT DUCT HEATERS
Whenever the system fever is moved to COOL, thermostat
system switch completes a circuit R to O, energizing the
reversing valve solenoid. On a call for cooling, the cooling
bulb completes a circuit from В to C, energizing the blower
relay coil. The blower relay contacts complete a 230 voit
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 terminal 4 at the lockout relay.
Terminal 4 of the lockout relay provides two paths for <urrent
flow.
1, Through the lockout reiay coil which offers the
resistance of the lockout relay coil,
2. Through the normaily closed contacts of the lockout
relay to terminal S 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 normai), 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 paint of the high (low) pressure control, the normally
closed contacts of the high (low) pressure control apen and
currant no longer flows to the compressor contactor coil--the
coii drops out, Current now can take the path of least
resistance through the lockout relay coil, energizing the
lockout relay coil and opening terminalis 3 and 5 of the lockout
relay. The lockout relay will remain energized as long as a
circuit is completed between К 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 terminals4 and 5 to make. When the
high (low) pressure switch closes, a circuit is completed to L
at the thermostat, energizing the signal light to indicate a
maifunction. When the system switch is moved from OFF to
COOL, the cycie is repeated.
FIGURE 5
N
2. SINGLE STAGE HEAT WITHOUT DUCT HEATERS
Compressor circuit R to Y 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 stage heating without
duct heater. When the second stage thermostat bulb makes,
a circuit is completed from R to W2, energizing the duct
heater heat contactor, R1, through the automatic thermal
cutout (TCO). The contacts of R1 close a circuit to the
heat pump blower relay and, through the manual reset
thermal cutoff device, to the elements. Elements and blower
remain energized as long as R to WZ are made.
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 from R to W2 through the thermostat second
stage heating bulb, Blower operation is controlled by the
second stage heating bulb. Operation is the same as above,
"Two Stage Heat With Duct Heaters."
/
SYSTEM START UP PROCEDURE
Be sure main power to the unit is OFF at the disconnect.
Set thermostat system switch to OFF, fan switch to AUTO.
Move main power disconnect to ON, Power should be on to
unit for a minimum of 4 hours or 60 minutes per pound of
refrigerant. This allows the crankcase heater to drive any
refrigerant liquid out 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.
Check system air flow for obstructions.
a) Move thermostat fan switch to ON. Blower runs.
D) Be sure ail registers and grilles are open.
с) Move thermostat fan switch to AUTO. Blower should
stop.
Fully open the manual inlet and outlet vaives,
Check water flow, (See Photo 1)
3) Connect a water flow meter to the drain cock (127,
Fig.5) 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 HWP30)
c) When water flow is okay, close drain cock and remove
the water flow meter. The unit is now ready to start.
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,
Check the system refrigerant pressures ÁN against the
cooling refrigerant pressure curves on page 12 and 13 of
this manual for rated water flow and entering water
temperatures. If the refrigerant pressures do not match,
check for air flow probiem then refrigeration system
problem.
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 solencid valve opened again,
Check the refrigerant system pressures À) against the
heating refrigerant pressure curve 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):
a) Check for possible refrigerant leaks.
6) 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.
A For models with domestic hot water heat exchanger,
be sure the water pump switch is off while checking
refrigerant system.
UNIT WITH HEAT RECOVERY FOR HEATING
DOMESTIC HOT WATER -- HWPD SERIES
GENERAL
Units having a heat recovery coil should only be instailed by
trained refrigeration technicians. These instructions serve as
a guide to the technician installing the heat recovery portion
of the unit, They are not intended as a step-by-step
procedure with which the mechanically inclined owner can
instal! 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 "waste" heat to heat domestic hot
water. Units so equipped may be identified by the letter "OD"
in the model number. In addition to the components already
described for the heat pump, these units are equipped with
an additional water-to-refrigerant coil, а circulating pump
and a thermostat to control the operation of the circulating
pump. The water-to-refrigerant coil is constructed of two
tubes. Water flows through the center tube, totally separated
trom the water tube. The space between these two tubes js
vented to atmosphere. In the unlikely event a [eak should
develop, no leakage can occur between the water and the
refrigerant.
INSTALLATION
1. TWO TANK. In order to realize the maximum energy
savings from the domestic hot water heat recovery unit, it is
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 installation. !f the existing water
heater is electric, the two tank installation is still the best
approach, however, a one tank instailation is satisfactory.
Tanks specifically intended for hot water storage are
available from water heater manufacturers (solar hot water
storage tanks). These tanks have special dip tube
arrangements, are built without heaters and are constructed
with heavier insulation. However, a well insulated electric
water heater 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 requirsments 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 hot water per day per individual. For example, a
family of four would require 64.3 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 noted, however, that the amount of
savings realized is 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 hot water heater shouid 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 down on
the efficiency of the water heater and heat recovery unit
could damage the circulating pump, or clog the strainer and
stop water flow,
= я соли —
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Pressure Oele encina!
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пил rT
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TT
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, +1
To uE — ,
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Ш Shut Off
! valves,
7 |
Heal Recovery Co
N ¿Mater Pump {See Note) |
x
‚Solengic Valve
Water Pump
Thermostat
Existing | - | AS
I Or Main | | ВЫ \_ Pluyged
| Adler | ; Tees
eater | Shut Off Valves
OA Strainer
|
rain
FL A il il
NOTE Do not operaté water pump TYPICAL "HWPDY MODEL
achout water times connected and ONE TANK INSTALLATION
Adler 111 system with shut off valves (Permissible)
open! Turn pum switch to off. FIG. 8
Optional mr Cold 3
В ура $ + f water [n
„000 Г |
Hah 2 a —
a ee - | | Check Valve |
Ze def alee fr AN TÉ (Optional) Heat Recovery Coil
| L
Do | Insulate {7 | X
| Pr ÿ x Water Pump (See Note)
1 To \ ' ' *
astur ee co `
op TA i y Г Shut OFF \ | Salenoid Valve
| | ао Valves \ NON
NA t | 1 i
i : | ‚ :
u. |
НЕ | |
| a I |
| " | |
‚ |
| | |
| | |
1 | , À
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a |
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a о
| 0
| |, И!
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| Existing Additional Hou
| Water Heater dater Storage | :
| LP, das, 011, Tank. Not |
Po Electric electrically Strainer |
| = connected |
и Ома + п
|
—/
NOTE: Do not operate water pump
without water fines connected and
water in system with shut off vaives
open‘ Turn pump switch to off,
р —
TYPICAL "HWPD” MODEL
TWO TANK INSTALLATION
{Preferred)
К \ Water Pump
‘Thermostat
| DN
Poo NU Plugged
Teas
| Shut Off Valves
Fic. 7
-
LOCATION
In determining the location of the storage tank (and the water
heater) keep in mind that small temperature differences
between the storage tank water temperature and the
refrigerant temperature permit this unit to function. It is
consequently necessary that all tubing be kept as short and
direct as possibie and that the tubing be adequately and
thoroughly insulated.
Locate the storage tank as close to the heat pump and water
heater as the installation permits. Be sure to provide
adequate service access to all components.
INSTALLATION PROCEDURE - GENERAL
1. Turn off the water heater electric power (if electric hot
water heater) or close the fuel supply line (if fossil fuel
water heater}.
2. Turn off the electric power to the water source heat
pump.
3. Shut off the main water supply fine by closing the
water valve at the well pressure tank {if à 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 sediment and thoroughly
flush the water heater tank,
WATER PIPING
Two tank installation, refer to Piping Diagram, Fig. 7 and
steps ! to 3, and Two Tank installation instructions. One
tank installation, refer to Piping Diagram, Fig. 8 and steps !
to 3 and One Tank installation instructions. Follow ail focal
plumbing codes. Piping connections are 1/2 inch 0.D. copper
pipe, Type K or L, and are made inside the unit. A
removable 4x4 panel has been provided in the unit side to
permit safely soldering the connections. Route the copper
through the end of the heat pump through the holes
provided.
1. A plugged tee and shut off valve should be provided
near the heat pump unit. This will make it easy if it ever
becomes necessary to clean the desuperheater coil. A suitable
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 coii
and pump for the cleaner.
2. A strainer is included in both figures to coilect any
sediment which may accumulate in the storage tank or water
heater. This strainer should be of the cieanable "Y" type. It
is more important that the strainer be included on one tank
retrofit installation where the hot water heater may be
suspected of sedimentation.
3. A check valve is shown in both figures as an option,
The purpose of the check valve is to prevent any
contamination of the water system in the unlikely event that
the heat exchanger develops 2 leak. Check the local plumbing
code as this check valve may be required.
TWO TANK INSTALLATION - FIGURE 7
1. Water into the heat recovery unit is taken from the
bottom of the storage tank. This location will insure that the
coldest water will always be circulated to the recovery unit.
2, If a solar type water storage tank is being used
(specifically designed for storing 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 pipa nipple in
the water heater drain connection (bottom of the tank). The
run of the tee is connected between the water heater and a
. drain valve. Brass or bronze fittings are recommended for
these fittings. Check 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 pipe
thread to sweat adapter to connect the tubing between the tee
and recovery unit.
4. The "water out" tubing from the recovery unit is
connected through a tee to the storage tank and to the
normal "water in" of the main water heater.
5. Cold water into the storage tank is connected to the
"water in" of the storage tank.
6. An optional bypass loop with valve is shown in Fig, 7
between the water into the storage tank and the "water out"
of the storage tank. The loop will make future service work
easier should it become necessary to drain the storage tank,
in normal operation the valve in the bypass loop should be
ciosed.
ONE TANK INSTALLATION -- FIGURE 3
NOT RECOMMENDED FOR FOSSIL FUEL FIRED WATER
HEA
1. Unless the single hot water heater is new, it should be
thoroughly inspected and cleaned of sediment. Flush the
tank several times and inspect it after each flushing. Be
sure the tank is free of sedimentation.
2. Water from the hot water heater is connected to the
domestic hot water supply as any conventional hot water
heater would be connected.
3. 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 the 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 solenoid valve are wired in parallel
with the heat pump compressor (230 VAC circuit]. Thus, no
water can be circutared to the water-to-refrigerant coil
unless the compressor is in operation.
In addition, a thermostat, attached to the entering water
tube of the pump, is wired in series with the pump motor
and solenoid valve, The thermostat is normally closed and
opens when the tube temperature reaches 150°F. This will
stop further heating of the water by the recovery unit and
is intended to prevent overheating the water. The thermostat
will reset at approximately 120°F,
Heat for domestic hot water is obtained from the discharge
gas of the compressor. This heat would ordinarily be
rejected to the ground water in the cooling mode or to the
room air in the heating mode. With the recovery unit this
heat is transferred to the storage tank or water heater,
START UP AND CHECK QUT
1, Be sure all shut off valves are open. If optional
bypass valve, See Fig. 7, has been installed, this valve
should be closed.
2. Open a hot water faucet to permit any air to bleed
from the plumbing.
3. Turn off the heat pump disconnect.
4. Temporarily remove compressor wire from [oad side of
contactor and insulate.
S. Turn heat pump disconnect ON.
6, Set the wall thermostat to cool.
J
. Inspect for water [eaks and verify pump is operating.
8. Again turn off the heat pump disconnect,
9. Re-install compressor wire on compressor contactor
terminal.
TO. Repeat steps 5 and 6, Feel the "water in" and "water
out! tubes. There should be a noticeable temperature
differance, How much temperature difference 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 OFF, Verify that water
pump stops.
— 9
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, ¡f performed
correctly, will provide information on the rate of flow and on
the capacity of the weil. it is important to consider the overail
capacity of the well when thinking about a water source heat
pump because the heat pump may be required to run for
ex tended 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 probiem 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
ar more of the following ways:
1. Decrease in water flow through the unit,
2. Decreased heat transfer of the water coii {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 siimy deposit
through out the water system. Shock treatment of the well is
usually required and this is best left up to the well driiler.
The treatment consists of injecting chlorine into the well casing
and flushing the system until ail 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. 50 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 dissimifar
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 water system will reduce corrosion problems
significantly,
(4) Scale formation. Of all the water probiems, the formation
of scale by ground water is by far the most common. Usually
this scale is due to the formation of caicium carbonate but
magnesium carbonate or calcium sulfate may also be present,
Carbon dioxide gas (CO) the carbonate of calcium and
magnesium carbonate, is very soluble in water, It wil! 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 encugh to cause the dissolved gas
to fall out of solution. Likewise if pressure drops are kept to
a reasonable level, no precipitation or carbon dioxide should
occur,
REMEDIES OF WATER PROBLEMS
WATER TREATMENT, Water
economically justified for closed loop systems. However,
because of the large amounts of water involved with a
ground water heat pump, water treatment is generally too
expensive.
treatment can usually be
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 acid
solution can be introduced into the heat pump coil through
the hose bib (Part 8 of Fig. 9). Be sure the isolation valves
{Parts 9 and 11 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,
FIGURE Y
BULKET OF
ACID SOLUTION
[Sqm Twat)
- 10-
ve”
A The pressure drop through the constant
flow valve will vary depending on the
available pressure ahead of the valve.
Unless a minimum of 15 psig is avail-
able immediately ahead of the valve no
water wiil flow.
— 11—
TABLE 5
WATER COIL PRESSURE DROP
Model | HWP30-HWPD30 | HWP36-HWPD36
B GPM | PSIG | Ft.Hd. | PSIG | Ft.Hd.
— 4 2.0 4.6 1.9 4.4
5 3.0 6.9 2.0 4.6
7 6 4.21 10.0 2.4 5.5
A
: 7 5.7 | 13.1 3.0 6.9
8 7.5 | 17.3 3.9 9.0
9 9.5 | 21,9 5.51 12.7
De 10 |12.0| 27.7 | 7.61 17.5
o 11 | 14.8! 34.1 {10.41 24.0
и” Мах
Air Flow 12 [17.6] 40.6 | 15.3] 35.3
13 [20.3% 46.8 | 20.6 | 47.5
TABLE 1
ACCESSORY ITEMS = DUCT HEATER
MINIMUM | SIRE SIZEÁN мах. DIMENSIONS TABLE 6
PART NO. | PH | VOLTS | XW
AMPACITY [oo | Al FUSE isa wie. le
WATER COIL RATED FLOW
8604-067 1| 240 4.8 25 #10 #8 9 | 12 | 17 | © MODEL СРМ
8604-068 1| 240 9.6 50 + 6 $4 8 | 16 | 17 | 6
8604-069 /N| 1] 240 | 15.0 79 #3 | 41 12 | 18 | 27 12 HWP 30 a
8604-070/NN 1| 240 l19.21 100 4 1 | #0 |100 | 12118 | 27 | 12 HWPD 30
HWP 16
A Use wire suitable for at least 90°C. HWPD36 5
A Fused units (over 48 amperes).
TABLE 2 TABLE 3
INDOOR BLOWER PERFORMANCE RATED RECOMMENDED
CEM - DRY COIL MODEL CFM | AIR FLOW RANGE— CFM
E.S.P. HWP 30 HWP 36 ado 1000 900 - 1100
In HWPD30 HWPD 16
HO
2 HWP 36
Motor Speed | Motor Speed HWPD36 1200 1080 - 1320
Low Eigh
. 00 1140 1340
10 1120 1300
20 1990 1260 TABLE 4
28 2033 $222 MIN. AVAILABLE FLOW RATE
‘ ll PART NO. | PRESSURE PSIG GEM
59 975 1100
„60 330 1035
8603-010 15 A 4
"Filter included. See unit A
specifications for rated CFM 8603-011 15 A 3
8/83
HWP30, HWPD30 @ 4 СРМ
) ) NOTE: On units with heat recovery ).
(HWPD) turn water pump switch to "off"
These curves are based upon 80°DB, 67°WB R.A.Temp. and before measuring refrigerant pressures.
Rated CFM (airflow) for cooling and 70°DB for heating
and should be used for reference purposes only. If there LOW SIDE PRESSURE--PSIG
is any doubt as to correct operating charge being in the (SUCTION LINE)
system, the charge should be removed, system evacuated,
and recharged according to serial plate instructions. © > = ~ D 3 7
O о
zZ Z
— -
O O
O Q
o U
O
FA
--
<С
LU
XL
Oo o © o o o o o o o o o o o o
oO o ve + сы o O
+ © m © A с с с с ~ 2 2 = =
HIGH SIDE (DISCHARGE LINE) PRESSURE -- PSIG
80 90 100 110
—12-
70
60
50
40
WATER TEMPERATURE ENTERING WATER COIL--DEGREE F.
8/83
HWP36, HWPD36 @ 5 GPM
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
360
340
0
Z
J
Q
O
O
o < o o o oO co o
cu < со ; vo << oJ o co
с em С с cu oJ cu —
HIGH SIDE (DISCHARGE LINE) PRESSURE -- PSIG
NOTE: On units with heat recovery coil
(HWPD), turn water pump switch to "off"
before measuring refrigerant pressures.
LOW SIDE PRESSURE--PSIG
(SUCTION LINE)
00
0
Cn CO ~~ LO un
160
140
120
40
60 70 80 90 100 110
50
40
WATER TEMPERATURE ENTERING WATER COIL--DEGREE F.
-13-
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-18-
PERFORMANCE CHECK
WATER SQURCE HEAT PUMPS
INSTALLER PLEASE FILL OUT AND
RETAIN WITH UNIT
DATE OF INSTALLATION MODEL NO(S). SERIAL NO(S).
ITEM COOLING | HEATING § JOB NUMBER
I. 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. WATER FLOW (GPM)
8. AMPERES (BLOWER)
9. AMPERES (COMPRESSOR)
10. LINE VOLTAGE
(COMPRESSOR RUNNING) | i
11. AIR TEMP.(IN) D.B. |
W.B.
12. AIR TEMP.(OUT) D.B..
W.B.
13. DESUPERHEATER H,0
TEMP. (IN)
14, DESUPERHEATER H20
TEMP. (OUT)
This PERFOEMANCE CHECK SHEET should be
filled out by installer md retained with unit.
PARTS LIST
PACKAGED HORIZONTAL
WATER SOURCE HEAT PUMPS
PART NO, DESCRIPTION HWP30 |HWPD30 | HWP36 ¡HWPD36
| 900-050 Blower Assembly Compiete x x x x
5152-047 Blower Wheel DD 10-6 X X X X
8552-007 Capacitor Comp. 20/15 - 370V X X
8552-035 Capacitor-Comp. 40/370V X X
8552-025 Capacitor - Blower 7.5/440V X X X X
8000-071 Compressor AB225HT X X
8000- 052 Compressor CRC1-0250 X X
5052-001 Condenser Coil X X
5052-001 Condenser Coil X X
8401-007 Contactor - Compressor X X X X
5052-004 Desuperheater Coil X X
5060-034 Evaporator Coil X X X X
8406-016 High Pressure Switch X X X X
8406-015 Low Pressure Switch X X X X
8105-022 Motor - Blower 1/3 PSC X X X X
8200-003 Motor Mount X X X X
8201-008 Relay - Blower X “X X X
8201-015 Relay - Emergency Heat X X X X
8201-034 Relay - Lockout x x x x
5650-009 Reversing Valve X X
5650-008 Reversing Valve X X X X
5650-005 Reversing Valve X X
5650-011 Solenoid Vaive X X
5210-010 Strainer (2) (2) (2) (2)
8607-011 Terminal Block X X X X
5651-041 Thermostat Expansion Valve X X X X
8300-001 Water Pump X X
8408-007 Water Pump Thermostat X X
8406-020 Toggle Switch X X
8407-015 Transformer__55VA X _X X x
OPTIONAL ITEMS:
8604-067 Duct Heater 4.8 Kw X X X X
8604-068 Duct Heater 9.6 Kw X X X X
8604-069 Duct Heater 15.0 Kw X X X X
8604-070 Duct Heater 19.2 Kw [x X X X
8603-006 Solenoid Valve X X X X
8603-010 Constant Flow Valve 4 CPM X X
8603-011 Contant Flow Valve 5 GPM X X
Minimum Net Billing $15. 00.
Subject to change without notice. F.O.B. Bryan, Ohio.
— 2 0-
Supersedes all previous lists.
Var:
SINCE / 19/4
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 | Joe 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) FIELO 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. DESUPERHEATER H,0
TEMP. (OUT)
This PERFORMANCE CHECK SHEET should be
filled out by installer ard returned to:
Bard Manufacturing Company
P.O. Boz 607
Bryan, Ohto 43506
20
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ВЕ В Оооо aaa
PLACE
STAMP
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BARD MANUFACTURING COMPANY
P. O. Box 607 -
BRYAN, OHIO 43506
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