GH10NA USER MANUAL
PAGE
15
Issue I
AUGUST 2017
8.
OPERATING THE HUW BOILER
The GH10NA Controller allows connection of an additional pump to control the Hot Utility Water (HUW) in
the boiler.
8.1.
Instalation and Connections
To use the Hot Utility Water (HUW) heating option, perform the following actions:
1.
connect the boiler according to the enclosed diagram (
⇒
section 6.1.1 page 7).
2.
install the HUW temperature sensor in the HUW storage
We recommend mounting HUW temperature sensor in GECO
measuring drain. You can not mount temperature sensors in
measuring drain with water or oil !!!
3.
connect the HUW temperature sensor to the Controller at the appropriate terminals as
shown in Fig. 2
4.
configure the HUW pump for operation (
⇒
section 8.2 page 13).
8.2.
Configuration of Additional Pump
This procedure allows you to connect an additional pump that can be used as a mixing pump or a Hot
Utility Water (HUW) pump operating with or without higher priority.
The HUW pump is started when the boiler outlet water temperature is higher than 40°C and higher than
the water in the HUW boiler (to prevent cooling of the HUW boiler), and the HUW boiler temperature is lower
than the temperature set in the
U2
setting (
⇒
section
7.3
page 11).
Pump operation is indicated by a dot on the display next to the fan symbol.
If the boiler room is configured as shown in the diagram (
⇒
section 6.1.1 page 7) then the boiler
controller has no external alarm output, but allows to view the HUW boiler temperature
by pressing
.
HUW temperature sensor is additional equipment and it’s not includes
to the standard set controller GH10NA.
Additional equipment can be delivery according with additional order.
