Evco c-pro micro SAVE Uživatelský manuál stáhnout pdf (Strana 42)

C-PRO MICRO SAVE APPLICATION MANUAL

Page 42

Anti-freeze safety on hot water circuit (AL04)

The anti-freeze mechanical thermostat (digital input DI7) is mounted downstream the coil either

inside or outside the pipe. On its intervention (voltage free contact closure on controller digital

input), the controller carries out the following steps:

a) Open the 3-way valve completely (hot water)

b) Close the fresh air damper

c) Stop the fans

This alarm is enabled by setting PA08=1 and is only active if the hot water coil is enabled

(PG02=1). The alarm is signalled after a set delay (parameter PA09) and is reset automatically.

6.7.4.2 Heating with electric heaters (3 stages)

To use the electric heaters for space heating purpose it is necessary to set the parameter PG02=2.

The control is based on the supply temperature via a supply Set Point (SPHM parameter) and a

relevant differential (Pb02 parameter.

Between following activation / de activation of the heaters a delay has been implemented

(parameter Pb05) in order to prevent for simultaneous current peaks.

In case the control probe has an alarm condition it is possible to decide the number of heaters to be

activated during the the alarm by setting the Pb06 parameter. If Pb06=0 in probe error condition no

heater is active.

Heaters thermal overload alarm

Via the DI8 (Electric heaters thermal overload protection) digital input it is possible to activate the

heaters thermal overload alarm. On occurrence of this alarm the heaters are immediately switched

OFF. The alarm is signalled after a fixed delay of 2 seconds and is reset automatically. The alarm is

enabled by setting PA12=1. The alarm can be enabled only if the heaters are configured (PG02=2).

6.7.4.3 Heaters status

Each of the three heaters can assume one out the following status:

1. Disabled: the heater is not managed by control.

2. Off: the heater is not active.

3. In switch-ON stand-by: the heater is about to switch-ON, it is in stand-by due to protection

times.

4. In switch-OFF stand-by: the heater is about to switch-off, it is in stand-by due to protection

times.

5. On: the heater is active.

6. Alarm: the heater is blocked due to the relevant thermal overload alarm.

heater

Pb02

heater

SPHM: Outlet Setpoint

Supply Temperature

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 53 54

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Evco c-pro micro SAVE Uživatelský manuál Strana 42