Honeywell EN2H-0221GE51 R0808 ユーザーズマニュアル

Hydraulic Components 

SDC / DHC  

128 EN2H-0221GE51 

R0808 

The start-up protection function prevents condensate building up 
when heating up while cold. 

There are three different modes of start-up protection that can be 
set: 

 

When the temperature in the heat generator drops to 2 K below 
the set minimal limit, all heating circuits are separated, at the 
water side, from the heat generator (pumps = off, mixed heating 
circuit = closed) to pass through the dew point as quickly as 
possible. The heating circuits are enabled as soon as the 
temperature in the heat generator has reached the minimum limit 
plus half of the burner switching differential 1. 

 

Start-up protection controlled by weather conditions 

The heating-up characteristic is the same as for unlimited start-up 
protection, meaning the heat generator remains in operation until 
the set minimum temperature plus half of burner switching 
differential 1 is exceeded. Below the minimum temperature, the 
pumps remain switched off and the mixed heating circuit closed. 

Once the heat generator has been switched off, the start-up 
protection becomes active again only when the heat generator 
temperature drops below the weather-responsive demand value 
(acc. to heating curve setting and nominal room setting). The 
subsequent heating-up follows the same scheme as for unlimited 
start-up protection. The result is a mean value based on the 
difference between the weather condition-controlled demand 
value and the minimum limit setting. This mean value will be 
significantly lower than the value set for a heat generator 
operated with a permanent minimum temperature limit.