Regulus PG 500 Compact User manual

EN
v. 1.2
UNINTERRUPTIBLE POWER SUPPLY WITH THERMOSTAT
FOR REGULUS CTC EcoAir HEAT PUMP
Installation, Wiring and Operation Instructions

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Contents:
1 Description ................................................................................................................................ 3
2 Technical data ................................................................................................................................ 3
3 UPS THERMOSTAT connections ..................................................................................... 4
4 UPS THERMOSTAT wall installation ..................................................................................... 4
5 Electric wiring ................................................................................................................................. 5
6 Temperature sensor connection ...................................................................................... 6
7 Operation description ................................................................................................................... 6
8 Operation overview ................................................................................................................... 7
9 Overview of possible faults and troubleshooting ......................................................... 8
10 Maintenance ..................................................................................................................................8
Enclosed:
Instruction Manual for UPS PG500
Scope of Supply:
•Backup power source UPS PG500
•UPS THERMOSTAT with Pt1000 sensor
•Power supply transformer 230V/12V
•Wall mount elements
•Auxiliary relay Z-R230/S0

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Temperature resistance table for Pt1000 sensors:
°C 0 10 20 30 40 50 60 70 80 90 100
Ω 1000 1039 1077 1116 1155 1194 1232 1270 1308 1347 1385
1 Description
UPS THERMOSTAT is designed to protect heat pumps from water circuit freezing during power breakdown.
Under current operation when a heat pump is power supplied from the mains (i.e. no power breakdown), the UPS
THERMOSTAT acts as a connection between the UPS unit (PG500) and the backup battery, ensuring charging.
At the same time, it keeps the relay closed, permitting the controller to have the pump under control. When power
breakdown occurs, the UPS THERMOSTAT disconnects from the UPS unit (PG500) in order to prevent the battery
discharge.
If the temperature at the thermostat sensor drops below 5°C, the UPS THERMOSTAT connects the battery with the
UPS unit (PG500) and the circulation pump is started. The pump is kept running until the sensor temperature rises
above 6°C. This prevents the water circuit of the heat pump from freezing.
In this Instruction Manual, the use of a PG500 UPS unit, Z-R230/SO auxiliary relay and a 12V/44Ah backup battery
is presumed.
2 Technical data
Electric data:
Voltage 12 V DC +/- 10 %
Electronics consumption (stand-by) 0.08 W
Electronics consumption (on) 1.8 W
Switching current 30A (no fuse)
Power source consumption 0.1 W
El. protection IP20, SELV
Recommended battery 12 V, 44 Ah capacity
Auxiliary relay:
Voltage 250 V / 50 Hz
Nominal current 20 A
Permissible ambient conditions:
Operation temperature 0-40 °C
Transport/storing temperature 0-60 °C
Operation air humidity max. 85 % RH at 25 °C
Transport/storing air humidity no moisture condensation permitted
Further specications and dimensions:
Case two-part ABS plastic
Installation position on a wall
Overall dimensions 125×75×50 mm
Indication LEDs
Temperature sensors:
Sensor Pt 1000 with 2.5m cable
Sensor cable 2×0.75 mm2, max. permissible length 30m

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Layout principles:
• UPS unit (PG500), UPS THERMOSTAT and battery shall be placed close to one another in
such a manner that the prepared length (2m) of 12V cables (2 blue cables and 2 red ones) will
be sufficient.
• The sensor shall be placed into a heat pump’s heating water sheath. The sheath shall be
mounted into the outdoor pipe section, min. 200mm and no more than 400mm from the wall.
Should the 2.5m cable be too short, it may be extended up to 30m (cf. Technical data).
3 UPS THERMOSTAT connections
Wiring diagram:
4 UPS THERMOSTAT wall installation
Installation
Install the UPS THERMOSTAT in dry rooms only.
1. Unscrew the lid screws and remove them.
2. Put the lid aside. Be careful not to damage the electronics inside.
3. Hold the back plate in the desired position and mark 4 mounting holes. Make sure the selected place is
at and the case will not get distorted after tightening the screws.
4. The enclosed screws and dowels can be used to mount the thermostat on a wall.
HP
BAT UPS
TERM
CIRC. PUMP
THERMAL
STORE
CONTROLLER
RELAY
or sensor

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5 Electric wiring
All the components shall be wired to the same phase with the same circuit breaker!
Procedure for el. wiring:
1. Make sure the the breaker of the circuit in question is switched o. Verify with an electrical tester that
the right circuit breaker is o.
2. Plug the cable with wall plug into the socket on the UPS (PG500) back side. Wire the live wire from UPS
(L-UPS) to the auxiliary relay, contact No. 3. Then wire the neutral lead N-UPS to the pump N clamp
(see the wiring diagram).
ATTENTION! The neutral wire from UPS (N-UPS) and the mains neutral wire (N) must not be connected!
3. Connect the heat pump controller outlet designed for a circulation pump to the auxiliary relay,
contact No. 1.
4. Wire the live and neutral conductors from the 230V mains to the auxiliary relay contacts A1 and A2.
ATTENTION! This shall be the same phase as THERMOSTAT and UPS are wired to.
5. Plug the 230V/12V power supply transformer into one of these two sockets. Then connect the
transformer terminal into the socket at the bottom of the UPS THERMOSTAT. The power supply
transformer is intended only to check for the presence of the mains. Its power consumption is
negligible (cf. Technical data).
6. Wire the UPS THERMOSTAT with UPS (PG500) using the red and blue cables. Marking“UPS+”and
“UPS-”. Mind the polarity!
7. Connect the contacts No. 2 and 4 of the auxiliary relay using a jumper and wire them to the live (L)
pump clamp. The jumper shall be of the same diameter as the pump L wire.
8. Only after having connected the previously mentioned components, connect the battery to the UPS
THERMOSTAT. Marking “UPS+” and“UPS-”. Mind the polarity!
9. As the last step, connect the UPS (the power supply cable is included in its supply) into a 230V/50Hz
wall socket.
Schéma elektrického zapojení:
Wiring diagram:
CONTROLLER
BATT
THERMOSTAT

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6 Temperature sensor connection
The sensor shall be placed into a heat pump’s heating water sheath. The sheath shall be mounted into
the outdoor pipe section, min. 200 mm and no more than 400 mm from the wall.
The sheath shall be located downstream the heat pump – see the layout diagram.
If the unit cannot be placed in such a way that the supplied 2.5 m cable is enough, the cable may be
extended. The max. permitted sensor cable length is 30 m. The lead cross section is 0.75 sqmm. No
contact resistance may be present in the sensor leads.
Temperature sensor cable shall be routed separately from mains voltage cables!
7 Description of operation
Under current operation (i.e. no power breakdown), the heat pump controller switches the outlet for the
circulation pump power supply. The auxiliary relay is wired to this outlet. It is permanently closed as long
as electric tension is present in the network. The power supply transformer is connected to the same
outlet, being intended just to detect the presence of the mains for the UPS THERMOSTAT.
In this situation, the UPS battery is being charged permanently. The pump follows the commands from
the controller. The green LEDs on the THERMOSTAT and UPS are lit.
During power failure the auxiliary relay contact will switch to power supply from the UPS. Then, these
conditions may occur:
• If the piping has not cooled down yet, no LEDs are lit on the THERMOSTAT/UPS.
• As soon as the outdoor piping cools down below +5°C, the
yellow
yellow LED is lit on the THERMOSTAT
(temperature drop). At the same time, the green LED is lit (circulation pump running). The UPS is
power supplied from the battery, the
yellow
yellow LED is lit.
Hot water from the thermal store will warm up the piping and the THERMOSTAT will turn o the
circulation pump until the next temperature drop. The piping is being heated for 1-3 minutes (depending
on its length and the circulation pump used).
• Once the battery is flat, the UPS will not run any more (UPS LED is not lit), and if the piping
temperature drops below +5°C, then the
yellow
yellow and green LEDs are lit. In this case it is
recommended to drain water from the outdoor piping. If the frost persisted for a longer time, the
heat pump piping and condenser might freeze up.
If both the LEDs are lit on the THERMOSTAT and none on the UPS – drain the water!

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8 Operation overview
The meaning of indication LEDs:
green - circulation pump running
yellow - outdoor piping temperature below +5 °C
yellow - outdoor piping temperature below +5 °C
red - sensor defect
Detailed description of all the states:
Sensor Mains Temperat. Circ. pump Thermostat UPS Description
Sensor OK
Operation
Řízeno
regulací
green
green
Battery charging.
Pump switches by controller commands.
Power failure
>5 °C 0 Ready. Waiting for temperature drop at the
outdoor pipe.
<5 °C I
yellow
yellow
green
yellow
yellow
Antifrost one-o circulating the uid. The
circulation pump is fed from the battery.
<5 °C 0
yellow
yellow
green
NO PROTECTION - DRAIN PIPES!
LED Fault
LED Battery operation
LED Mains operation
ON/OFF push button
Sensor Mains Sensor condition Circ. pump Thermostat UPS Description
Sensor defect
Operation
Sensor
disconnected
Controlled
by HP
controller
red green
green
Battery charging.
Circulation pump switched on and o by
HP controller.
Power failure
I
red green
yellow
yellow
The circulation pump is running, fed from
the battery.
Operation
Sensor shortcut
Controlled
by HP
controller
red
yellow
yellow
green
green
Battery charging.
Circulation pump switched on and o by
HP controller.
Power failure
I
red
yellow
yellow
green
yellow
yellow
The circulation pump is running, fed from
the battery.

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9 Overview of possible faults and troubleshooting
FAULT DESCRIPTION CAUSE TROUBLESHOOTING
Green LED is not lit
on the THERMOSTAT
but the socket is
energized.
The 230/12V power
supply transformer is not
connected.
Check the transformer for outgoing voltage and
a proper position of the terminal in the unit.
The battery is not connected
or completely discharged.
Check the battery connection, replace the
battery.
10. Maintenance
Maintenance consists of checking the charging function.
Before a heating season starts, check the condition of the battery.

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IMPORTANT INFORMATION ON DISPOSAL IN COMPLIANCE
WITH THE EUROPEAN DIRECTIVE 2002/96/ES
Do not dispose of this product as unsorted municipal waste.
Please dispose of this product by returning it to the point of sale
or to your local municipal collection point for recycling.
Respecting these rules will help to preserve, protect and improve
the quality of the environment, protect human health and utilize
natural resources prudently and rationally.
The crossed out wheeled bin with marking bar, printed ether in the
Manual or on the product itself, identifies that the product must be
disposed of at a recycling collection site.
WEEE number: 02771/07-ECZ

06/
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REGULUS spol. s r.o.
Do Koutů1897/3 http://www.regulus.eu
CZECH REPUBLIC
Date of Purchase:....................................
Rubber stamp print and signature of the seller:
1. The warranty period is 24 months from the date of purchase.
2. When claiming warranty, this Warranty Certificate must be submitted together with
the purchase receipt.
3. The warranty is valid only when the technical conditions set by the Manufacturer
are maintained.
4. The warranty does not cover defects caused by tampering, improper handling,
using the product to other purposes than designed for, installing the appliance in
unsuitable environment, or by a natural disaster.
5. Your claim will be dealt with by your seller at the address shown.
REGULUS UPS THERMOSTAT
WARRANTY CERTIFICATE
WARRANTY CONDITIONS
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