31
In response to a drop in the reset source, the cooling setpoint
is normally reset upwards in order to optimise unit
performance.
To set Cooling Reset Select
1. Navigate to the Configuration menu.
2. Select
Reset Configuration
(RESETCFG).
3. Set
Cooling Reset Select
[cr_sel].
Cooling Reset Select [cr_sel]
0 = none
1 = OAT
2 = delta T
3 = 4-20mA control T
4 = Space Temp
The amount of reset is determined by linear interpolation
based on the following parameters:
• A reference at which reset is zero (OAT, delta T,
4-20 mA signal, space temp. – no reset value).
• A reference at which reset is maximum (OAT, delta T,
4-20 mA signal, space temp. – full reset value).
•
The maximum reset value.
Reset example in Cooling mode
10°C
OAT
20°C
3
Reset based on delta T
5
4
Reset based on analogue input (4-20 mA)
20
10°C
Reset based on space temperature
20°C
no reset
selection
full reset
Legend:
A: Maximum reset value
B: OAT / delta T / 4-20 mA / Space temp. for no reset
C: OAT / delta T / 4-20 mA / Space temp. for full reset
D: Building load
8.4 - Ramp loading
The control provides the ramp loading function used to
minimise the rate at which the water temperature changes.
The minimum speed is calculated based on saturated
condensing temperature and saturated suction temperature.
Ramp loading sequence can be enabled by the user (Ramp
Loading Select, GEN_CONF – General Configuration).
8.5 - Capacity limitation
The Touch Pilot control system allows for the constant control
of the unit capacity by setting its maximum allowable
capacity. Capacity limitation is expressed in percentage,
where a limit value of 100% means that the unit may run
with its full capacity (no limitation is implemented).
The main control system enables to limit the unit capacity
using one of the external orders:
•
By means of user-controlled volt-free contacts.
Units without the energy management module have one
contact (lim_sw1). Units with the energy management
module have an additional contact (lim_sw2) which
permits three capacity limitation levels (see section
The unit capacity should not exceed the limit setpoint
activated by these contacts. The limit setpoints can be
modified in the SETPOINT menu.
• By lag limit set by the master unit
(master/slave assembly).
• By night mode limitation control. The demand limit
value in the night mode is selectable if the value is
below the selected demand limit.
Demand limit can be forced when the unit is operating in
Network mode.
To set Switch Limit Setpoint
1. Navigate to the Main menu.
2. Select
Setpoint Table
(SETPOINT).
3. Set
Switch Limit Setpoint 1 / 2 / 3
[lim_sp1/lim_sp2/lim_sp3].
Switch Limit Setpoint 1 [lim_sp1]
Switch Limit Setpoint 2 [lim_sp2]
Switch Limit Setpoint 3 [lim_sp3]
0 to 100%
To set Night Capacity limitation
1. Navigate to the Configuration menu.
2. Select
General Configuration
(GEN_CONF).
3. Set
Night Capacity Limit
[nh_limit].
Night Capacity Limit [nh_limit]
0 to 100%
To verify the active demand limit value
1. Navigate to the Main menu.
2. Select
General Parameters
(GENUNIT).
3. Verify
Active Demand Limit Val
[DEM_LIM].
Active Demand Limit Val [DEM_LIM]
0 to 100%
WARNING:
Under specific operating conditions, the unit
capacity limit can be exceeded to ensure the safety of the unit.
Содержание TOUCHPILOT 30KAV
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