Hayward HP50A1 Service manual

SWIMMING POOL HEAT PUMP UNIT
Installation & Instruction Manual
Models HP50A1
HP70A1
Hayward Pool Products Canada, Inc.
2880 Plymouth Dr., Oakville, ON L6H 5R4
Haywardpool.ca / 1.888.238.7665

CONTENTS
1. Preface 1
2. Specifications 2
2.1 Performance Data of Swimming Pool Heat Pump Unit 2
2.2 Dimensions for Swimming Pool Heat Pump Unit 3
3. Installation and Connection 5
3.1 Installation of System 5
3.2 Swimming Pool Heat Pumps: Location 6
3.3 How Close to your Pool? 6
3.4 Swimming Pool Heat Pumps: Plumbing 7
3.5 Swimming Pool Heat Pumps: Electrical Connection 8
3.6 Initial Start-Up of the Unit 8
3.7 Water Flow Setting 9
4. User Interface 10
10
12
12
13
14
14
5. Maintenance and Inspection 15
5.1 Maintenance 15
15
6. Appendix 16
16
6.2 Wiring Diagram 17
6.3 Exploded View and Spare Parts List 19
4.1 General presentation
4.2 Clock settings
4.3 Timer function settings
4.4 Operating mode selection
4.5 Setting and visualisation of the set point
6.1 Connection of PCB: Illustration
5.2 Winterising

1
1. PREFACE
In order to provide our customers with quality, reliability and versatility, this product has
been made to strict production standards. This manual contains installation, service and
maintenance. Please read this manual carefully before you open or maintain the unit. The
manufacturer of this product will not be held responsible if someone is injured or the unit
is damaged as a result of improper installation, service or unnecessary maintenance. It is
vital that the instructions within this manual are adhered to at all times. The unit must be
installed by qualied personnel.
The unit can only be repaired by qualied installer center personnel or an authorized
dealers (HVAC).
• Maintenance and operation must be carried out according to the recommended time
and frequency, as stated in this manual.
• Use genuine standard spare parts only.
• Failure to comply with these recommendations will invalidate the warranty.
• The Swimming Pool Heat Pump Unit heats the swimming pool water and keeps the
temperature constant.
This type of heat pump has the following characteristics:
1. Durable
The heat exchanger is made of PVC & titanium; the tube can withstand prolonged expo-
sure to corrosives such as chlorine.
2. Quiet operation
The unit contains efcient rotary compressor and a low noise fan motor, which assures
its quiet operation
3. Electronic control board
The unit is controlled by an internal micro-controller, allowing all operation parameters to
be set. Operation status can be displayed on the control panel.

2
2. SPECIFICATIONS
2.1 Performance Data of Swimming Pool Heat Pump Unit
*** REFRIGERANT: R410A
Unit Model HP50A1 HP70A1
Heating Capacity kW 14.7 22.0
BTU/h 50,000 75,000
Heating Power Input kW 2.68 4.2
Running Current A 12 19
Power Supply V/Hz 208-230V~/60Hz 208-230V~/60Hz
Compressor Quantity 1 1
Compressor(s) Rotary Rotary
Fan Quantity 1 1
Fan Power Input W 120 120
Fan Rotate Speed RPM 850 850
Fan Direction Horizontal Horizontal
Noise (at 1 meter) dB(A) 54 56
Water Connection inch 1.5 1.5
Water Flow Volume Imperial/US m3/h/gpm 4.5/20 6/26
Water Pressure Drop (max) kPa/psi 10/1.5 12/1.5
Unit Net Dimensions (L/W/H) mm/in 1049x400x652 /
41.3x15.7x25.7
1162x470x865 /
45.7x18.5x34
Unit Shipping Dimensions
(L/W/H) mm 1130x470x680 /
44.5x18.5x26.8
1220x490x880 /
48x19.3x34.6
Net Weight/Shipping Weight kg 58/71 106/123
Heating: Ambient temp (DB/WB): 80ºF (26.7ºC) / 75.8ºF (24.3ºC)
Water temp (in/out): 80ºF (26.7ºC) / 92ºF (28ºC)

3
2. SPECIFICATIONS
2.2 Dimensions (mm/inches) for the Swimming Pool Heat Pump Unit
Model: HP50A1
652/25.7"
455/17.9"
103/4.1"
265/10.4"
Water Outlet
1.5 '
Water Inlet
1.5 '
630/24.8"
430/16.9"
1002/39.4"
400/15.7"
1049/41.3"

4
2. SPECIFICATIONS
2.2 Dimensions (mm/inches) for the Swimming Pool Heat Pump Unit
Model: HP70A1
Water Inlet
1.5 '
100/3.9
400/15.7
Water Outlet
1.5 '
470/18.5
1115/43.9
790/31.1
435/17.1
447/17.6
1119/44.1
868/34.2"

5
3. INSTALLATION AND CONNECTION
3.1 Installation Illustration

6
3. INSTALLATION AND CONNECTION
3.2 Swimming Pool Heat Pumps: Location
3.3 How Close To Your Pool?
Normally, the pool heat pump is installed within 24.6ft (7.5 metres) of the pool. The longer
the distance from the pool, the greater the heat loss from the piping.
2500mm
98"
300mm
11.8"
700mm
27.6"
500mm
19.7"
700mm
27.6"
Air Inlet
Air Outlet

7
3. INSTALLATION AND CONNECTION
3.4 Swimming Pool Heat Pumps: Plumbing
The titanium heat exchanger requires no special plumbing except bypass (please set the ow
rate according to the nameplate). The water pressure drop is less than 1.5psi (10KPa) at maxi-
mum ow rate. Since there are no residual heat or ame temperatures, the unit does not need
copper heat sink piping. PVC pipes can be run straight into the unit.
Location: connect the unit in the pool pump discharge (return) line downstream of all lter and
pool pumps, and upstream of any chlorinators, ozonators or chemical pumps. Install the rubber
feet onto the bottom of the unit.
*You will need to use 1½” male PVC adapter to connect to the heat pump.
Consider adding a quick coupler tting at the unit inlet and outlet to allow easy draining of the
unit for winterizing and to provide easier access should servicing be required (coupler supplied
with unit).
Condensation: since the heat pump cools the air down about 4-5ºC water may condense on
the ns of the horseshoe shaped evaporator. If the relative humidity is
very high, this could be as much as several gallons/litres an hour. Verify the unit is level so that
water will run down the ns into the basepan and drain out through the barbed plastic conden-
sation drain tted on the side of the basepan. This tting is designed to accept 3/4” clear vinyl
tubing and run to a suitable drain. It is easy to mistake the condensation for a water leak inside
the unit.
NB: a quick way to verify that the water is condensation is to shut off the unit and keep the
pool pump running. If the water stops running out of the basepan, it is condensation. An EVEN
QUICKER WAY IS TO TEST THE DRAIN WATER FOR CHLORINE - if there is no chlorine pres-
ent, then it’s condensation.

8
3. INSTALLATION AND CONNECTION
3.5 Swimming Pool Heat Pumps: Electrical Connection
3.6 Initial Start-Up

9
3. INSTALLATION AND CONNECTION
3.7 Water Flow Setting
With the water entry and exit valves being open, adjust the by-pass valve in
order to obtain a difference of 2°C between the inflow and outflow temperature
(see principle diagram § 3.1). You can verify the switch by seeing the entry/
exit temperatures directly on the control panel.
Water inlet temperature
Water outlet temperature
Note: Opening the by-pass valve creates a weaker flow, which leads to an

Closing the by-pass valve creates a stronger flow, which leads to a


10
4. USER INTERFACE
(*) Function not available on this model.
4.1 General presentation
The heat pump is equipped with a digital control panel with a touch screen,
electronically connected and pre-set at the factory in heating mode.
1On/Off
2Water inlet
3Clock and timer settings
4Compressor ON
5Conversion °C/°F
6Dry contact OUT2
7Fan ON
8Silent mode (*)
9Silent mode indicator
10 Locked screen
11 Alarm
12 Timers 1 and 2
13 Timers’ time
14 Mode selection
15 Scroll down / Decrease
16 Water outlet
17 Scroll up / Increase
18 Save / settings
19 Defrost mode
20 Automatic mode
21 Heating mode
22 Cooling mode
1
2
3
4
5
6
7
8
1091112
13
14
15
16
17
18
19202122
Legend

11
4. USER INTERFACE (continued)
OFF Mode
When the heating pump is in sleep mode (OFF Mode) “OFF” is displayed on
the command screen.
ON Mode
When the heating pump is running or regulating (ON Mode), the inlet and
outlet water temperatures are displayed on the command screen.
1 minute
1 minute

12
4. USER INTERFACE (continued)
At the end of a setting, press to validate.
The settings will be automatically saved if no button is pressed during 20s.
4.2 Clock settings
If the display is in standby mode, press briefly on .
1) Press to bring up the symbol .
2) Press to make the time display flash. Set the hour using the buttons
.
3) Press then set the minutes with the buttons .
4) Press to validate.
4.3 Timer function settings
Setting this function is necessary if you would like to run the heat pump for
a shorter period than what is defined by the filtration clock. Therefore, you
can program a deferred start and an anticipated stop or simply stop a certain
timeframe from running (at night, for example).
It is possible to set 2 Start Timers (ON1 et ON2) and 2 Stop Timers (OFF1 et
OFF2).
Timer 1 setting – Start
1) Press for 2s, Timer ON1 flashes (*).
2) Press to set the hours with the buttons .
3) Press to set the minutes with the buttons .
4) Press to validate.
Timer 1 setting – Stop
1) Press for 2s, Timer ON1 flashes (*).
Press once, Timer OFF1 flashes.
2) Press to set the hours with the buttons .
3) Press to set the minutes with the buttons ..
4) Press to validate.
(*) To access Timer ON2 directly, press for 2s, then press twice.

13
4. USER INTERFACE (continued)
Timers suppression (Start and Stop)
1) Press for 2s, Timer ON1 flashes.(*)
2) Press to make the time display flash.
3) Press to suppress the Timer .
4) Press to validate.
5) Press for 2s, the Timer flashes.
Press once , the Timer flashes.(*)
6) Press to make the time display flash.
7) Press to suppress the Timer .
(*) To access Timers 2 or , follow steps 1) or 4) then press
twice . Proceed in the same manner as above.
Timer 2 settings
After the Timer 1 settings, you will access directly the settings for Timer 2:
and .
Proceed in the same manner as for Timer 1.
Nota: To access directly Timer ON2 , press for 2s, then press
twice on .
4.4 Operating mode selection
cooling, heating or automatic
In Mode “OFF” or “ON”
Press the button to change mode: cooling, heating or automatic.
If the heat pump is set in heating only or cooling only, changing mode
is not possible.

14
4. USER INTERFACE (continued)
4.5 Setting and visualisation of the set point
(wished water temperature)
If the button is not visible on the screen, press briefly.
(While operating or stopped, simply press the button to view the set point)
In Mode “OFF” or Mode “ON”
Press the button to display the set point, then press or to set the
set point you wish.
The setting is made with a precision of 0.5 °C.
It is recommended to never exceed 30°C to avoid alteration of the liners.
4.6 Locking and unlocking the touch screen
Press the button for 5 s until it beeps and this symbol appears .
To unlock, press for 5 s until it beeps and this symbol disappears .

15
5. MAINTENANCE AND WINTERISING
5.1 Maintenance
These maintenance operations must be carried out once per year in order to
guarantee the longevity and the good working condition of the heat pump.
 Clean the coil with the help of a soft brush or jet of air or water (Warning,
never use a high pressure cleaner).
 Verify that the drains flow well.
 Verify the tightening of the hydraulic and electrical connections
 Verify the hydraulic sealing of the condenser.
Before any maintenance operation, the heating pump must be
disconnected from any electrical current source. The maintenance
operations must only be carried out by personnel that is qualified and
authorised to handle liquid refrigerants.
Any damage caused by poor winterising maintenance will lead to
cancellation of the warranty.
5.2 Winterising
 Put the heat pump in “OFF” mode.
 Cut the power supply to the heat pump.
 Empty the condenser with the help of the drain to avoid any risk of
deterioration. (high risk of freezing).
 Close the by-pass valve and unscrew the entry/exit connection unions.
 Eliminate the maximum amount of residual stagnant water from the
condenser with the help of an air gun.
 Close the water entry and exit areas of the heating pump to avoid
introducing foreign bodies.
 Cover the heating pump with a dedicated winterising case.

16
6. APPENDIX
6.1 Connection of PCB Illustration

17
6. APPENDIX
6.2 Wiring Diagram - HP50A1