Heat/Cool Mode; Pumps And Variable Flow; Fixed Speed - Daikin EWWQ-KC Operating Manual

3.5. Unit mode
The Unit Mode is used to define if the chiller is configured to produce chilled or heated water. This parameter is related to the unit
type and is set in factory or during commissioning operation.
Current mode is reported in the main page.
The path in the Web HMI interface for Unit mode configuration is "
Menu Parameter Range
0 = Cool
02 00
(Unit Mode)
1 = Cool with glycol
2 = Cool / Heat
3 = Cool / Heat with glycol

3.5.1. Heat/Cool Mode

Heat/Cool operating mode can be set using a Digital Input.
All settings related to Cooling-Heating operation will produce a real mode change only if Unit Mode parameter (refer to menu 01) is
set to:
▪
Heat/Cool
▪
Heat/Cool w/Glycol
In all other cases no mode switch will be allowed
Menu Parameter
02 00
(Unit Mode)
Digital input reference
Cool/Heat switch
3.6.

Pumps and Variable Flow

The UC can manage one water pump connected to the water plate heat exchanger. The pump control type is configured in page
[15] and can operate in two different ways:

1. Fixed Speed

2. DeltaT
Menu
15
(Customer Configuration)
The path in the Web HMI interface for Pump Ctrl Type is "
"/ "
Evap Pump Type Main Menu
3.6.1. Fixed Speed
First control mode, Fixed Speed, allows an automatic pump speed variation, between two different speeds.
Main Settings are:
1. Speed 1
2. Standby Speed
Range
0 = Cool
1 = Cool with glycol
2 = Cool / Heat
3 = Cool
/ Heat with glycol
Digital input state Description
Opened
Cooling mode is selected
Closed
Heating mode is selected
Parameter
00
(Evaporator Pump Ctrl Mode)
04
(Cond Pump Ctrl Mode)
→ →
Commission Unit
→
Main Menu Unit Mode
Description
Set if chilled water temperature up to 4°C is required. No glycol is
generally needed in the water circuit unless ambient temperature may
reach low values. In case of water greater than 4°C, but water circuit with
glycol, set mode "Cool with glycol".
Set if chilled water temperature below 4°C is required. This operation
requires proper glycol/water mixture in the plate heat exchanger water
circuit.
Set in case a dual cool/heat mode is required. This setting implies an
operation with double functioning which is activated through the physical
switch or BMS control. ="=!
•
COOL: The unit will work in cooling mode with the Cool LWT as the
Active Setpoint.
•
HEAT: The unit will work in heat pump mode with the Heat LWT as
the Active Setpoint.
Same behavior of "Cool / Heat" mode but Chilled water temperature below
4°C is required or glycol is present in the water circuit.
Description
Only cooling mode is permitted
Both heating and cooling mode is permitted
Descriptiion
0 = On- Off
1 = Fixed Speed
3 = DeltaT
0 = On- Off
1 = Fixed Speed
3 = DeltaT
→
Main Menu Commission Unit
→
Configuration Options
→ ".
Mode
R/W
W
W
→
Configuration
".
→ Cond
Pump Type
D-EOMHP01501-22_00EN 11/29
Psw
1
1
→ →
Options