Set Points And Control Strategies - Dantherm HCH 5 Installations- Und Serviceanleitung

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:
Fan Step 0
Fan Step 1
Fan Step 2
Fan Step 3
Fan Step 4 (maximum speed)
'OFSET'
(gears between Fan Step1-2-3)
Automatic cooling/bypass
Bypass, Tmax (extract temperature, T3)
Bypass, Tmin (outside temperature, T1)
Automatic Demand Mode (RH%)
Filter duration
Frost protection, exchanger
(see below)
Frost protection, after-heat
Selecting 'of' eliminates automatic bypass.
*)
Frost protection The unit's frost protection works as follows:
16
Set points
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 reaches + 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.
Factory set- Setup range
ting
HCP 4
Control panel
Off -
Gear 14 Gear 1 - 41
Gear 39 Gear 21 -66
Gear 64 Gear 46 - 91
Gear 100 Gear 100
25 gears -
T3 ≥ 24 °C -
T1 ≥ 15 °C -
45% 45%
180 days 180 days
T4 ≤ + 2 °C -
T2 ≥ + 5 °C -
HRC 2
Remote
-
Gear 1 - 71
Gear 36 -81
Gear 46 - 91
From Fan Step
3 to Gear 100
10 – 30 gears
-
*Of/22-30 °C
Of/8-15 °C
35-65%
90-360 days
-
-
Continued overleaf