WATER-SOURCE HEAT PUMPS 61WG 020-090
Remote control option
Pro-Dialog+ permits control and monitoring of the unit using
a wired interface:
-- Start/stop
-- Operating mode selection: cooling or heating
-- Demand limit
-- Dual setpoint
-- User safety loop.
The control remotely reports any problem.
The CCN clock board connection offers other control
possibilities:
Two indepen dent time schedules to control:
-- Unit start/stop
-- Operation at a second chilled-water setpoint (for
example: unoccupied mode)
-- Operation of two units in parallel (master/slave
function), and remote control via a communication
bus (RS 485 serial port).
Minimum Maximum
Evaporator
Entering water temperature at start-up
°C
7.5*
27
Leaving water temperature during operation
°C
5**
20
2.5
7
Entering/leaving water temperature difference K
Condenser
Entering water temperature at start-up
°C
15***
60****
Leaving water temperature during operation
°C
20
65
2.5
18
Entering/leaving water temperature difference K
*
**
For entering water temperatures below 7.5 °C at start-up, contact Carrier.
If the leaving water temperature is below 5 °C, a frost protection solution must be
used. Please refer to option 6 for evaporator leaving water low-temperature applications (< 5 °C).
*** For applications with a condenser entering temperature below 15 °C the use of a
three-way valve is recommended. This three-way valve can be controlled by the 0-10 V
analogue output of the Pro-Dialog+ control.
**** For a water flow rate that corresponds to a maximum water-side temperature difference
of 5 K.
61WG + option 272 (geothermal
application)
65
60
55
50
45
40
35
30
25
20
15
Standard
Option 272
-8
-6
-4
-2
0
2
4
6
8
10
12
14
16
18
20
Evaporator leaving water temperature, °C
61WG standard unit
61WG unit with option 272 (brine to water)
Option 272: Condenser-side high-temperature water production, with glycol solution
on the evaporator side
HEATING
61WG
Condenser leaving water temperature, °C
Operating limits
Minimum Maximum
Evaporator
Entering water temperature at start-up
°C
-2.5*
25
Leaving water temperature during operation
°C
-5*
20
Entering/leaving water temperature difference
K
2.5
5
Entering water temperature at start-up
°C
15**
60***
Leaving water temperature during operation
°C
20
65
2.5
18
Entering/leaving water temperature difference K
*
**
A frost protection solution must be used.
For applications with a condenser entering temperature below 15 °C the use of a
three-way valve is recommended. This three-way valve can be controlled by the 0-10 V
analogue output of the Pro-Dialog+ control.
For a water flow rate that corresponds to a maximum water-side temperature difference
of 5 K.
CONTROLS
***
AIR TREATMENT
Condenser
C
A
R
R
I
E
R
2
0
1
6
/
2
0
1
7
525