Forced Defrost - Worcester GREENSOURCE 6 kW Installation Manual

Commissioning
Fan defrost inter val and Fan defrost time
Because weather conditions vary from place to place some factory settings
for defrosting may need adjustment. This particularly applies to locations
with high humidity where there is a risk that the fan will ice up. Fan defrost
means that warm air is blown upwards through the fan.
The fan defrost function is active when the value Fan defrost interval is
between 1 and 10, factory setting is 1. The value 1 states that fan defrost-
ing will occur at each ordinary defrosting. If the value is set to 3 then fan
defrost occurs every third defrost.
Select how long fan defrost should last. The factory setting is 1 min.
Min = 1 and max = 5.
The function is deactivated by selecting 0 in Fan defrost interval.
Temperature limit for fan defrost is set to -5ºC. No fan defrost occurs below
this temperature. This setting can be changed under Fan defrost in the
Advanced menu.

Forced defrost

Forced defrost is used to by-pass the timer and temperature conditions for
defrost. Temperature T11 (refrigerant temperature evaporator) must be
below the set stop level for defrosting.
Disable compressor pre heater at high outdoor
temperature
Checked by outdoor sensor T2. When the outdoor temperature exceeds
the set value the crankcase heating in the compressor is deactivated. The
compressor pre heater is active when the compressor is idle and the
outdoor temperature is below the set value. Factory setting = 10ºC. Min =
5ºC and max = 20ºC.
Anti-jamming mode time
At the set time each day the circulation pumps G1 and G2, three-way valve
VXV and fan are run for one minute each, provided that they have not been
in operation during the previous twentyfour hours. Factory setting = 2,
which means 02:00. Min = 0, max = 23.
Alarm buzzer signal length
In event of an alarm the alarm signal is sounded for the set time if the
signal is not deactivated. The factory setting is 1 minute, max setting is 10
minutes.
T1 Set point value maximum
This value is set to max, that is 80°C, on delivery. The value may need to be
reduced if only underfl oor heating is used.
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