Dantherm HCH 5, Installation And Service Manual

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16
Set points and control strategies
Introduction This section describes the different factory settings for HCH 5 and HCH 8 and the pos-
sibilities for adjustments on the control panel and the remote control.
Factory settings Default factory settings:
Set points Factory set-
ting
Setup range
HCP 4
Control panel
HRC 2
Remote
Fan Step 0 Off - -
Fan Step 1 Gear 14 Gear 1 - 41 Gear 1 - 71
Fan Step 2 Gear 39 Gear 21 -66 Gear 36 -81
Fan Step 3 Gear 64 Gear 46 - 91 Gear 46 - 91
Fan Step 4 (maximum speed) Gear 100 Gear 100 From Fan Step
3 to Gear 100
10 – 30 gears
‘OFSET’
(gears between Fan Step1-2-3) 25 gears - -
Automatic cooling/bypass
Bypass, Tmax (extract temperature, T3)
Bypass, Tmin (outside temperature, T1)
T3 ≥ 24 °C
T1 ≥ 15 °C
-
-
*Of/22-30 °C
Of/8-15 °C
Automatic Demand Mode (RH%) 45% 45% 35-65%
Filter duration 180 days 180 days 90-360 days
Frost protection, exchanger
(see below)
Frost protection, after-heat T4 ≤ + 2 °C
T2 ≥ + 5 °C
-
-
-
-
*)
Selecting ‘of’ eliminates automatic bypass.
Frost protection The unit’s frost protection works as follows:
1) Frost protection of the exchanger.
The control strategy has a built-in frost protection preventing ice building up in the
heat exchanger.
If the exhaust air temperature (T4) is below + 2 °C for 1½ hours or longer, the unit
starts reducing the flow rate of supply air (i.e. RPM of the supply fan is reduced) until
the exhaust air temperature r 2 °C. Frost protection normally starts when
outdoor temperature (T1) reaches ÷ 6 - ÷ 7 °C, or below.
2) Unit shots down at an outside temperature below ÷ 13 °C
If the outside temperature (T1) is below ÷ 13 °C for more than 5 minutes, the unit will
stop operating for 30 minutes to prevent ice from building up. If the outside temper-
ature does not reach a temperature above ÷ 13 °C, the units shots down for another
30 minutes, etc.
Continued overleaf