TriangleTube Prestige Supplement - Type 5 MCBA, Руководство по управлению приложением

Страница: 15 / 28

13
CENTRAL HEATING (CH) APPLICATIONS
The Prestige Boiler provides an outdoor reset feature,
which will lower the central heating (CH) setpoint as the
outdoor temperature rises. This allows the boiler output
to more closely match the actual heat load requirements
and thus improve efficiency. A heating call can be sent
from a Room Thermostat (Factory Setting), the outdoor
temperature sensor, or an external control system.
During a heating call, the domestic hot water (DHW) cir-
culator will be disabled from providing water to the
Indirect Water Heater. The CH circulator will be enabled
and the boiler setpoint will be set to the CH setpoint.
CH CONFIGURATION OPTIONS
The following outline lists the CH configuration options
that are available.
1. Room Thermostat (Parameter 45 = 00)
The heating call is initiated from a switched dry contact
such as a room thermostat or zone panel.
a. Fixed CH Setpoint
The CH Setpoint is set to the CH Maximum
Boiler Operating Setpoint (Parameter 4) when
an Outdoor Temperature Sensor is not connect-
ed to the boiler. Additional features include:
CH Application Selection (Parameter 3)
CH Circulator Post Pump Time (Parameter 32)
CH Call Blocking Time (Parameter 40)
b. Outdoor Reset
The CH Setpoint will vary between the CH
Maximum Boiler Operating Setpoint (Parameter
4) and the CH Minimum Boiler Operating
Setpoint (Parameter 10) when an Outdoor
Temperature Sensor is connected to the boiler.
Additional features include:
CH Application Selection (Parameter 3)
Frost Protection (Parameter 13)
Boost Feature (Parameter 19)
CH Circulator Post Pump Time (Parameter 32)
CH Call Blocking Time (Parameter 40)
2. Constant CH Demand (Parameter 45 = 01)
The heating call is continuous.
a. Outdoor Reset
The CH Setpoint will vary between the CH
Maximum Boiler Operating Setpoint (Parameter
4) and the CH Minimum Boiler Operating
Setpoint (Parameter 10) when an Outdoor
Temperature Sensor is connected to the boiler.
Additional features include:
CH Application Selection (Parameter 3)
Frost Protection (Parameter 13)
CH Block Temperature (Parameter 18)
Parallel Shift Feature (Parameter 20)
CH Circulator Post Pump Time (Parameter 32)
3. 0-10 VDC Analog Signal (Parameter 45 = 02 or
03)
The heating call is initiated from an external modu-
lating boiler controller. The CH Maximum Boiler
Operating Setpoint (Parameter 4) limits the water
supply temperature from the boiler. Additional fea-
tures include:
CH Application Selection (Parameter 3)
CH Circulator Post Pump Time (Parameter 32)
CH Call Blocking Time (Parameter 40)