Technical data
86
CTC EcoZenith i250
Installation CTC EcoAir 520M
15. Connection of CTCEcoAir520M
heat pump
The CTCEcoAir520M is a modulating heat pump that is fully designed to
work with the CTCEcoZenithi250L.
The following applies when installing the CTCEcoAir520M with the
CTCEcoZenithi250H/L:
• Powered separately. The products are switched on separately. Control
cabling only between the products.
• CTC circulation pump item no. 586988301 (7.5m HP) can be added to
handle flow requirements with normal installation.
• The heat pump strives to deliver the correct temperature to the
primary flow water. The setpoint for the upper tank or lower tank. If
there is insufficient power the compressor speed increases. When the
temperature approaches the setpoint the compressor speed reduces.
The CTC EcoZenith i250 is supplied with suitable factory settings for the CTC EcoAir 520M.
Enertech AB recommend these for optimal operating economy.
The CTC EcoAir 520M is set at the factory to automatically
vary (modulate) the compressor speed between 20 and 90
rps in cold weather and to vary it between 20 and 50 rps in
warm weather as shown in the adjoining diagram.
Outdoor ºC
-25 -20 -15 -10 -5 0 5 10 15 20 25 30
100
90
80
70
60
50
40
30
20
10
0
rps